Abstract

A lightweight intelligent localization method for multi-base-station integrated sensing and communications (ISAC) is provided. To improve stability and accuracy of a multi-base-station system in localizing an unmanned aerial vehicle (UAV), the present disclosure proposes a two-stage screening neural network architecture on a basis that a plurality of base stations estimate coordinates of the UAV by using a least squares subspace rotational invariance technique. This architecture uses a dynamic threshold grouping mechanism in a first stage to realize differentiable base station pre-screening through a straight-through estimator (STE); and in a second stage, designs a learnable exponential correction term that combines physical characteristics of a distance and a signal-to-noise ratio (SNR), and constructs a multi-objective loss function to simultaneously optimize localization accuracy and physical consistency. While maintaining a lightweight characteristic, this solution supports millisecond-level real-time localization on an embedded device, significantly improving navigation reliability of the UAV in a complex electromagnetic environment.

IPC Classes  ?

• H04W 64/00 - Locating users or terminals for network management purposes, e.g. mobility management
• H04B 17/309 - Measuring or estimating channel quality parameters
• H04W 84/06 - Airborne or Satellite Networks

Abstract

The invention provides a photo-electric cooperative intervention orthokeratology lens for myopia improvement, which belongs to the technical field of biomedical devices. The orthokeratology lens comprises an external transmitting terminal and an internal receiving terminal; the two terminals realize passive supply of the light field and electric field of the internal receiving terminal through electromagnetic coupling. The internal receiving terminal is composed of a light intervention unit and an electric field intervention unit. The light intervention unit is built-in with a red light LED to achieve red light intervention, and the electric field intervention unit generates a potential difference to form an electric field. By integrating the circuit with the orthokeratology lens, the invention accelerates myopia improvement and reduces the discomfort and risks caused by long-term wearing of orthokeratology lenses.

IPC Classes  ?

• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• A61F 2/16 - Intraocular lenses
• H02J 50/10 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type

Abstract

Disclosed is an absorption terahertz direct modulator with zero reflection. The absorption terahertz direct modulator with zero reflection includes a rectangular waveguide and a modulation module, two ends of the rectangular waveguide are waveguide ports, the modulation module penetrates through cavity wall of the rectangular waveguide and is placed on a wide side of the rectangular waveguide in a way that its face is perpendicular to a face of the waveguide port, the modulation module includes filter units and a modulation unit disposed between the filter units, a cross-shaped slot line transmission structure and a semiconductor regulation device disposed on the cross-shaped slot line transmission structure are disposed on a front side of the modulation unit, a dual split ring is disposed on back of the modulation unit, and the dual split ring corresponds to the cross-shaped slot line in position.

IPC Classes  ?

• H01P 1/201 - Filters for transverse electromagnetic waves

Abstract

The present invention provides a method for colorimetric temperature measurement in ultra-high temperature environment based on multisource error self-correction, which firstly establishes a colorimetric temperature measurement formula, then determines a low-error characteristic curve based on green channel features of N pluralities of calibration images, thus creating a probability model that combines prior knowledge of calibration data with actual observation data in actual measurement, and lastly, performs a iterative optimization based on an established objective function to obtain a corrected temperature, thus the multisource errors are uniformly corrected and the accuracy of colorimetric temperature measurement in ultra-high temperature environment is significantly improved.

IPC Classes  ?

• G01K 11/12 - Measuring temperature based on physical or chemical changes not covered by group , , , or using changes in colour, translucency or reflectance
• G01K 15/00 - Testing or calibrating of thermometers

Abstract

A method for synchronizing and controlling backscatter communication based on an ambient cellular OFDM signal includes the following steps: S10, transmitting, by a transmitting terminal, an ambient cellular OFDM signal, which carries synchronization and control information; and S20, acquiring, by a backscatter tag, the synchronization and control information from the ambient cellular OFDM signal, including: utilizing, by the backscatter tag, an envelope-detection circuit to convert the ambient cellular OFDM signal into a digital pulse signal; establishing, by the backscatter tag, synchronization with the transmitting terminal by detecting a rising edge of the digital pulse signal; and identifying, by the backscatter tag, the control information of the transmitting terminal by detecting multi-segment pulse widths of the digital pulse signal.

IPC Classes  ?

• H04L 5/00 - Arrangements affording multiple use of the transmission path
• H04W 56/00 - Synchronisation arrangements

Abstract

The present disclosure discloses a fast approximate analysis method for mutual coupling-containing pattern of a large-scale ultra-wideband heterogeneous array, comprises: dividing the entire large-scale ultra-wideband heterogeneous array into a plurality of sub-arrays according to a type of element used by a heterogeneous array, ensuring that each sub-array contains elements of the same type; classifying the elements in the sub-arrays; selecting representative elements for representing environmentally similar elements, removing rows and columns that do not have the representative elements, and retaining all key features of the heterogeneous array; performing full-wave simulation on a constructed compact representative array, extracting AEPs of all the representative elements, and storing same; and replacing AEPs of the environmentally similar elements with the AEPs of the representative elements, performing approximate computing to obtain patterns of all the sub-arrays, and superimposing the obtained results to obtain a mutual-coupling-containing pattern of the heterogeneous array.

IPC Classes  ?

• G06F 18/241 - Classification techniques relating to the classification model, e.g. parametric or non-parametric approaches
• G06F 17/11 - Complex mathematical operations for solving equations
• G06F 30/20 - Design optimisation, verification or simulation
• H01Q 21/24 - Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction

Abstract

An exposure device or tool and a method for preparing circuits on curved surfaces, belonging to the technical field of exposure devices and tools, are disclosed. By expanding the designed pattern on the curved surface into multiple, continuous pattern blocks, the original curved pattern is converted into a flat pattern. Based on the flat pattern, a corresponding mask is designed, with the pattern areas retained. Subsequently, using the exposure device or tool, a photoresist on the curved surface is selectively exposed to light, thereby transferring the pattern from the mask to the curved surface. In this exposure process, rotation of the sample stage and horizontal movement of the mask, combined with the light from a light source, allow for the transfer of the pattern from the mask onto the curved sample or workpiece.

IPC Classes  ?

• G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
• G03F 7/16 - Coating processesApparatus therefor
• G03F 7/18 - Coating curved surfaces

Abstract

A method and system for positioning a trajectory of an ultrasonic logging tool includes steps: S1: inputting waveforms and extracting arrival times; S2: establishing a coordinate system and initializing a tool trajectory; S3: calculating an initial wave velocity in fluid using a least squares method, and calculating a distance between the tool and a casing and coordinates of casing's inner surface based on the initial wave velocity in fluid and time; S4: searching for an optimal tool trajectory based on the distance and the inner boundary coordinates, and updating a wave velocity in fluid based on a perimeter of the inner boundary; S5: repeating steps S3 and S4 until the update amount of the tool trajectory between two iterations is less than a threshold; S6: outputting a final tool trajectory, wave velocity in fluid and casing's inner surface.

IPC Classes  ?

• G01V 1/50 - Analysing data
• E21B 47/024 - Determining slope or direction of devices in the borehole

Abstract

A zero-delay panoramic video bit rate control method that considers distortion temporal propagation aims to optimize target bit allocation and achieve global rate-distortion optimization in coding. It encompasses coding tree unit (CTU)-level bit rate control and temporal global rate-distortion optimization. CTU-level bit rate control involves optimizing target bit allocation and updating bit rate control parameters. Temporal global rate-distortion optimization utilizes the reconstruction error and motion compensation prediction error information of the previous coded frame to estimate the temporal dependence between CTUs in the current coding frame and those in the previous coded frame to adjust the coding parameters of the current CTU. The coding parameters are further fine-tuned according to the area stretching ratio encountered during the projection of the panoramic video from a 3D spherical surface to a 2D plane, taking into consideration the detrimental impact of interpolated redundant pixels on the coding process.

IPC Classes  ?

• H04N 19/96 - Tree coding, e.g. quad-tree coding
• G06V 10/75 - Organisation of the matching processes, e.g. simultaneous or sequential comparisons of image or video featuresCoarse-fine approaches, e.g. multi-scale approachesImage or video pattern matchingProximity measures in feature spaces using context analysisSelection of dictionaries
• H04N 19/124 - Quantisation
• H04N 19/159 - Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
• H04N 19/172 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a picture, frame or field
• H04N 19/177 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being a group of pictures [GOP]

Abstract

An ultra-miniaturized wireless-controlled patch-type drug pump and a production method thereof, in the field of biomedical engineering device technology, are disclosed. The pump utilizes near-field communication (NFC) technology commonly found in smartphones to power the circuit. It injects drug into patients' bodies via volume alteration of a thermal expansion material and a gas generated by an electrolytic electrode, attaining pre-meal bolus and basal rate drug infusion. The drug pump has a relatively simple structure, a small size, and no need for an internal power supply, thereby alleviating at least some of the burden on patients and enhancing the comfort and convenience of wearing the pump. Meanwhile, it can be controlled through a smartphone application, simplifying the operation(s) of the pump and providing users with a precise and convenient drug injection approach.

IPC Classes  ?

• A61M 5/155 - Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. by means of pistons pressurised by gas
• A61M 5/145 - Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. by means of pistons
• A61M 5/142 - Pressure infusion, e.g. using pumps

Abstract

A method for constructing an infrared imaging dataset of gas leakage based on computational fluid dynamics includes steps of: establishing a three-dimensional physical model of a gas leakage field scene; meshing and simulating based on the computational fluid dynamics to obtain leaking gas mole fractions of each mesh under time steps, and constituting three-dimensional gas concentration data corresponding to each frame; using optical gas imaging based on a pinhole camera model, imaging the three-dimensional gas concentration data to obtain initial images, and calculating gas concentration path-lengths corresponding to pixel points in each frame of the initial images; and performing maximum-minimum value normalization and generating grayscale images, thereby constructing the infrared imaging dataset of the gas leakage. The method can not only be used in leakage classification tasks and localization tasks, but can also be used in training tasks related to the leakage concentration.

IPC Classes  ?

• G01N 21/35 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
• G01N 21/3504 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
• G06F 30/28 - Design optimisation, verification or simulation using fluid dynamics, e.g. using Navier-Stokes equations or computational fluid dynamics [CFD]
• G06F 113/08 - Fluids

Abstract

A method for synthesizing arbitrary distribution noise signal includes two parts. An upper computer fits H given distribution function ƒ(x) to obtain H pluralities of K pairs of means μkh and variances σkh, by using Expectation Maximization algorithm based on a weakened Gaussian Mixture Model. An FPGA stores H pluralities of K pairs of means μkh and variances σkh into RAM, function values that box-muller transformation needs into ROM 1 and ROM 2, then read out two function values and multiply them to obtain random number xn, means μkh and variances σkh are read out from RAM to synthesizing kth Gaussian noise signal yknh, after amplitude limitation and normalization, obtained analogy signal is amplified Amax−Amin times and set bias voltage to Amin to obtain analogy noise signal with amplitude interval. An arbitrary distribution noise signal with specific distribution is outputted.

IPC Classes  ?

• G06F 7/58 - Random or pseudo-random number generators

Abstract

A fault diagnosis method for the RF front-end circuit of a MIMO system includes using a Synchronous Enhancement Extracting Transform (SEET) to pre-process the acquired fault signal to extract fault feature, creating a fault identification model fused by a complex field based asymmetric convolutional neural network and a complex field based multi-head attention module to assign fault feature weights, extract key feature and identify fault status. The SEET can extract fault feature components, and calculate its real field feature and imaginary field feature to obtain a real field two-dimensional matrix i and an imaginary field two-dimensional matrix q, thus an enhanced time-frequency feature is obtained. The fault identification model is used for a transform from a complex field feature space to a high dimensional space and realizing the assignment of fault feature weights, key features extraction and fault status identification.

IPC Classes  ?

• G01R 31/28 - Testing of electronic circuits, e.g. by signal tracer

Abstract

Provided are a reinforcement learning method and system based on sequential decision-making, a device, and a medium. The method includes: preprocessing historical trajectory data of reinforcement learning to generate preprocessed historical trajectory data to train a Transformer network model, and transforming the reinforcement learning into a language conversion model task by using a text conversion mechanism in the Transformer network model, to generate a trained Transformer network model, where the Transformer network model is used to predict action information at a next time point in a historical environment, and determine a maximum target reward value in a historical environmental state to obtain a complete trajectory in the historical environmental state; and predicting action information at the next time point in a real environmental state by using the trained Transformer network model, to obtain a complete trajectory in the real environmental state.

IPC Classes  ?

• G06N 3/092 - Reinforcement learning
• G06N 3/0455 - Auto-encoder networksEncoder-decoder networks

Abstract

Provided are a method and system for novel-view image synthesis and rendering, a device and a medium. The method includes: acquiring initial information of a target model; performing neural texturing on the initial information to obtain neural texture (NT) information; and inputting the NT information to a synthesis rendering model to obtain a rendered image, where the synthesis rendering model includes an NT input module, an NT learning network module, and a differentiable renderer that are connected to each other; the NT input module receives the NT information, and transmits the NT information to the NT learning network module; the NT learning network module performs convolution and activation as well as concatenation on the NT information to obtain NT processed information; and the differentiable renderer adjusts and renders the NT processed information in a neural rendering manner to obtain the rendered image.

IPC Classes  ?

• G06T 15/04 - Texture mapping

Abstract

The present disclosure provides a three-dimensional semantic scene graph (3DSSG) generation method and system, and an electronic device, and relates to the field of three-dimensional (3D) scene graph generation. The method includes: obtaining a point cloud set and an object segmentation result of a target scene; determining a point cloud subset of each object according to the point cloud set and the object segmentation result; and determining a 3DSSG of the target scene according to a point cloud subset of any object and object auxiliary information by using a 3DSSG prediction model, where the 3DSSG prediction model is obtained by training a 3DSSG initial prediction model by using a training dataset; and the 3DSSG prediction model includes a Transformer-based feature extractor, a first multi-layer perceptron (MLP), a graph neural network (NN)-based relationship reasoning module, and a scene graph generation module. The present disclosure improves accuracy of generating a 3DSSG.

IPC Classes  ?

• G06V 10/86 - Arrangements for image or video recognition or understanding using pattern recognition or machine learning using syntactic or structural representations of the image or video pattern, e.g. symbolic string recognitionArrangements for image or video recognition or understanding using pattern recognition or machine learning using graph matching
• G06V 10/26 - Segmentation of patterns in the image fieldCutting or merging of image elements to establish the pattern region, e.g. clustering-based techniquesDetection of occlusion
• G06V 10/77 - Processing image or video features in feature spacesArrangements for image or video recognition or understanding using pattern recognition or machine learning using data integration or data reduction, e.g. principal component analysis [PCA] or independent component analysis [ICA] or self-organising maps [SOM]Blind source separation
• G06V 10/774 - Generating sets of training patternsBootstrap methods, e.g. bagging or boosting
• G06V 10/82 - Arrangements for image or video recognition or understanding using pattern recognition or machine learning using neural networks

Abstract

The present disclosure a dual-beacon electro-optical fusion terahertz communication tracking and aiming system and method. The system comprising a transmitter and a receiver, the transmitter includes a transmitting antenna, a first control module, a first communication module, a first information acquisition module, a first image acquisition and processing module, a first beam emitting end and a first gimbal. The receiver includes a receiving antenna, a signal processing module, a second control module, a second communication module, a second information acquisition module, a second image acquisition and processing module, a second beam emitting end and a second gimbal. Based on the disclosure, by means of a laser beacon and a terahertz beacon, the transmitter and the receiver in the terahertz communication system perform adjustment and alignment in real time, such that it is ensured that the terahertz communication system still keeps stable communication during movement.

IPC Classes  ?

• H04B 10/90 - Non-optical transmission systems, e.g. transmission systems employing non-photonic corpuscular radiation
• H04B 10/112 - Line-of-sight transmission over an extended range
• H04B 10/50 - Transmitters

Abstract

A 3D reconstruction method for PCB solder joints based on neural rendering, including using the signed distance function (SDF) to represent the solder joint surface, combining the bidirectional reflectance distribution function (BRDF) with the calibrated incident angle to represent the light intensity of solder joint images, and then unifying them into the neural rendering framework to optimize. The method uses existing solder joint inspection equipment to collect solder joint image, and reconstructs high resolution 3D reconstruction of solder joint from a single image with low cost.

IPC Classes  ?

• G06F 30/32 - Circuit design at the digital level
• G06F 115/12 - Printed circuit boards [PCB] or multi-chip modules [MCM]
• H05K 1/11 - Printed elements for providing electric connections to or between printed circuits

Abstract

An inverter circuit and inverter module without high-side power transistors are provided. The inverter circuit consists of at least two inverter modules connected in a ring structure. Each inverter module includes: A pre-filter circuit, having a signal input terminal and a signal output terminal, wherein the signal input terminal serves as the modulation signal input terminal; A central filter circuit, including a DC power input terminal and an AC power output coil, with the signal input terminal of the central filter circuit connected to the signal output terminal of the pre-filter circuit; A signal output circuit, with its signal input terminal connected to the signal output terminal of the central filter circuit, and its signal output terminal serving as the modulation signal output terminal. The inverter circuit and the inverter module enable a significant reduction in inverter costs and simplifies the controller algorithm.

IPC Classes  ?

• H02M 1/00 - Details of apparatus for conversion
• B60L 58/10 - Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
• H02M 1/38 - Means for preventing simultaneous conduction of switches
• H02M 1/44 - Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
• H02M 7/5395 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation

Abstract

A method for predicting adverse reactions between drugs based on multi-attribute and multi-kernel representation learning is provided. Aiming at existing differences of different drug properties in revealing a potential characteristic of adverse reactions between drugs and preference and tendency of different kernel functions themselves in calculating attribute representation similarities between drugs, the present invention, based on multi-attribute representations of drugs, provides a multi-kernel representation learning model, designs a distance learning strategy of kernel functions and a reconstruction strategy of the kernel functions, selects a representative kernel function, constructs an optimal kernel function combination by incidence relation between the representative kernel functions and original kernel function, reveals a relationship between the multi-attribute similarities of the drugs and the adverse reactions between drugs, and realizes prediction of the adverse reactions between drugs based on multi-attribute and multi-kernel representations.

IPC Classes  ?

• G16C 20/10 - Analysis or design of chemical reactions, syntheses or processes
• G16C 20/70 - Machine learning, data mining or chemometrics

Abstract

Provided is an individual-tree segmentation method of UAV LiDAR point cloud based on canopy morphology. The method uses woodland data obtained by a UAV LiDAR to: extract initial canopies from a CHM based on a region growing algorithm, determine whether each initial canopy is a correct segmentation canopy according to the number of local density maximum points in each initial canopy, finely segment each wrong segmentation canopy according to canopy morphology to obtain an updated set of tree tops, and finally use each of the updated set of tree tops as a seed point for performing the region growing algorithm to thereby obtain a final individual-tree segmentation result. The method make full use of height information and density information contained in a tree point cloud; and under the guidance of the density information, a wrong segmentation tree can be more accurately identified.

IPC Classes  ?

• G06T 7/187 - SegmentationEdge detection involving region growingSegmentationEdge detection involving region mergingSegmentationEdge detection involving connected component labelling
• G06T 7/11 - Region-based segmentation
• G06T 7/155 - SegmentationEdge detection involving morphological operators
• G06T 7/521 - Depth or shape recovery from laser ranging, e.g. using interferometryDepth or shape recovery from the projection of structured light

Abstract

In a fabrication method for a package structure, a copper foil is provided, electroplating is performed on the copper foil to form a cavity sacrificial post, a dielectric material is laminated to form a dielectric layer, wherein an end face of the cavity sacrificial post is exposed to the dielectric layer, a wiring layer is formed on the dielectric layer, the cavity sacrificial post is removed by etching to form a through cavity, a bonding pad is formed on the wiring layer, a reverse side of a device is mounted on the copper foil in the through cavity, and a terminal of the device is wire-bonded with the bonding pad.

IPC Classes  ?

• H01L 21/48 - Manufacture or treatment of parts, e.g. containers, prior to assembly of the devices, using processes not provided for in a single one of the groups or
• H01L 23/00 - Details of semiconductor or other solid state devices

Abstract

A lateral power semiconductor device layout and a device structure belong to the technical field of power semiconductor devices. A method for designing a lateral power semiconductor device layout with high integrity and high cell density has the following advantages of reducing a specific on-resistance of the device, increasing a width of a channel per unit area, improving the current capability of the device, optimizing the static characteristic of the device, reducing the area of a drain region and the parasitic capacitance of the device, reducing the delay time of a cell switch caused by an excessively long gate electrode of a traditional finger cell, optimizing the dynamic characteristic of the device, optimizing the cell edge of the device and the curvature effect of a terminal, and reducing the pre-breakdown risk of the device.

IPC Classes  ?

• H01L 29/78 - Field-effect transistors with field effect produced by an insulated gate
• H01L 29/06 - Semiconductor bodies characterised by the shapes, relative sizes, or dispositions of the semiconductor regions
• H01L 29/417 - Electrodes characterised by their shape, relative sizes or dispositions carrying the current to be rectified, amplified or switched

Abstract

An integrated structure of an ultrafast response hydrogen sensor includes: a gas path chamber; a gas extractor fixed to a gas inlet of the gas path chamber; and a first hydrogen sensor and a second hydrogen sensor provided inside the gas path chamber; wherein the gas extractor is located in an identical straight line with the first hydrogen sensor and the second hydrogen sensor; the first hydrogen sensor and the second hydrogen sensor each have an Port A and a Port B, and DC voltage is applied to the Port A of the first hydrogen sensor and the Port B of the second hydrogen sensor, and the Port B of the first hydrogen sensor is connected to the Port A of the second hydrogen sensor to form a shared port, and the shared port serves as a voltage output port.

IPC Classes  ?

• G01N 33/00 - Investigating or analysing materials by specific methods not covered by groups

Abstract

A power semiconductor device, including a cell region, a transition region, and a terminal region. The transition region is located between the cell region and the terminal region of the device. A first conduction type substrate, a first conduction type epitaxial layer located above the first conduction type substrate, and a first conduction type buffer layer located in the first conduction type epitaxial layer are jointly arranged at the bottoms of the cell region, the transition region, and the terminal region of the device. In a high-current application, since the cell region occupies the largest area of a chip, in a case that breakdown can occur in the cell region and the current can be discharged through the cell region. On the basis of ensuring the BV of the terminal region, a silicon layer step is formed by elevating the position of a top structure of the terminal region.

IPC Classes  ?

• H01L 29/06 - Semiconductor bodies characterised by the shapes, relative sizes, or dispositions of the semiconductor regions

Abstract

2 different capacitance values can be generated to reduce the chip area consumption. This structure can reduce the error to LSB/4 and the weighting error of the ADC, and increases the effective number of bits of the ADC without excessively increasing comparator gain.

IPC Classes  ?

• H03M 1/60 - Analogue/digital converters with intermediate conversion to frequency of pulses
• H03M 1/10 - Calibration or testing
• H03M 1/40 - Analogue value compared with reference values sequentially only, e.g. successive approximation type recirculation type
• H03M 1/46 - Analogue value compared with reference values sequentially only, e.g. successive approximation type with digital/analogue converter for supplying reference values to converter

Abstract

Embodiments of the present disclosure relate to the field of acoustic sensing demodulation with high signal-to-noise ratio, real-time demodulation, and high sensitivity, and in particular, to a parallel sensing and demodulation system for acoustic waves based on dual optical frequency combs. The present disclosure introduces dual optical frequency combs as multi-path parallel input light sources, leveraging features of the dual optical frequency combs including narrow linewidth, stable power, high sensitivity, and the capability of precisely converting signals from the optical domain to the radio frequency domain, so the dual optical frequency combs can be used as multi-channel parallel input light sources for acoustic array detection. Besides, some embodiments of the present disclosure employ three-wavelength adaptive demodulation technology to ensure that the detection of acoustic wave signals at every moment has a high signal-to-noise ratio and improved sensitivity for detecting weak signals.

IPC Classes  ?

• G01H 9/00 - Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means

Abstract

Provided is a fringe line detection and phase unwrapping method and system based on an FL-Net convolutional neural network. The method includes: constructing the FL-Net convolutional neural network; detecting fringe lines of an input image by using the FL-Net convolutional neural network to obtain an image with detected fringe lines; performing circulation integral on the detected fringe lines to repair the detected fringe lines to thereby obtain an image with repaired fringe lines; performing path integral on the repaired fringe lines to unwrap the repaired fringe lines to thereby obtain an image with unwrapped fringe lines; and identifying error points of the unwrapped fringe lines by using the FL-Net convolutional neural network; and processing the error points. Specifically, an HDC method is used to replace a down-sampling method to avoid the loss of resolution, and residual connection is used to prevent the network from being too deep.

IPC Classes  ?

• G06T 5/60 - Image enhancement or restoration using machine learning, e.g. neural networks
• G06T 5/30 - Erosion or dilatation, e.g. thinning
• G06T 5/73 - DeblurringSharpening

Abstract

A rice-crop intensity identification method based on radar time series observation and temperature analysis is provided. Capturing of diversified periodic characteristics of time series backscatter and detection of backscatter troughs are achieved through time series reconstruction and trough identification; potential phenological phases corresponding to the backscatter troughs are determined through potential rice phenological phase estimation; and through temperature limitation of rice phenological phase, temperature suitability of potential rice phenological phases is evaluated, a backscatter trough that does not satisfy a temperature condition is removed by combining a rice growth mechanism and a regulation of rice-crop intensity, thereby realizing the identification of the rice troughs and the correction of the overestimation of the rice-crop intensity, and finally realizing the identification of rice-crop intensity.

IPC Classes  ?

• G01S 7/41 - Details of systems according to groups , , of systems according to group using analysis of echo signal for target characterisationTarget signatureTarget cross-section
• G01S 13/88 - Radar or analogous systems, specially adapted for specific applications

Abstract

The present invention discloses a pipeline defect detecting and positioning method based on multi-sensor information fusion, which belongs to the technical field of pipeline non-destructive testing. The method comprises the following steps of performing state segmentation processing on a pipeline according to a pipeline defect detection signal and/or a three-axis attitude signal of a pipeline detection equipment in the pipeline, positioning a pipeline defect signal in the pipeline defect detection signal to a pipeline section in a corresponding state, and calculating a position of the pipeline defect signal in pipeline section in each state according to a running speed, the three-axis attitude signal, and mileage information of the pipeline detection equipment in the pipeline section in the corresponding state. According to the invention, the pipeline is segmented so that the pipeline defect can be preliminarily positioned in the pipeline section in a certain state.

IPC Classes  ?

• G01N 27/90 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents

Abstract

Disclosed are a perovskite solar cell and a fabrication method thereof. The perovskite solar cell includes an electron transport layer, a perovskite layer, and a hole transport layer, where the hole transport layer includes an inorganic substance serving as a hole transport material, and an organic layer including a carbazole derivative is formed on the hole transport layer. A combination of a carbazole derivative and an inorganic material serving as a hole transport layer can allow the preparation of a perovskite solar cell with a high conversion efficiency.

IPC Classes  ?

• H10K 30/86 - Layers having high hole mobility, e.g. hole-transporting layers or electron-blocking layers
• H10K 30/40 - Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation comprising a p-i-n structure, e.g. having a perovskite absorber between p-type and n-type charge transport layers
• H10K 30/57 - Photovoltaic [PV] devices comprising multiple junctions, e.g. tandem PV cells
• H10K 85/20 - Carbon compounds, e.g. carbon nanotubes or fullerenes
• H10K 85/50 - Organic perovskitesHybrid organic-inorganic perovskites [HOIP], e.g. CH3NH3PbI3
• H10K 85/60 - Organic compounds having low molecular weight

Abstract

Provided are a scattering aperture imaging method and a device, a system and a storage medium. The method mainly includes four steps of scattering point position estimation, azimuth resampling, range compensation and synthetic aperture radar imaging. A phased array radar with a fixed position is used for NLOS imaging, and the radar can control a beam to scan in space, which is equivalent to a scattering aperture moving along a relay surface. Therefore, the method can realize converting NLOS imaging into LOS synthetic aperture radar imaging, which can be suitable for the situation that a relay surface is rough and the relay surface with more complicated surface condition, thus widening the application range of radar NLOS imaging.

IPC Classes  ?

• G01S 13/90 - Radar or analogous systems, specially adapted for specific applications for mapping or imaging using synthetic aperture techniques
• G01S 7/295 - Means for transforming co-ordinates or for evaluating data, e.g. using computers

Abstract

The present invention discloses a Self-detection circuit based on power detector, comprising a power detector, a coupler, a phased array transmitting channel 1 and a phased array transmitting channel 2, and the power detector is divided into two working modes of phase test and amplitude test. The problems that the self-test circuit is complex and large in chip area are solved.

IPC Classes  ?

• G01R 31/28 - Testing of electronic circuits, e.g. by signal tracer
• H01Q 3/36 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elementsArrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture varying the phase by electrical means with variable phase-shifters

Abstract

The present disclosure provides a blockchain sharding method, system, and server based on locally repairable system codes. The blockchain sharding system includes k original shards and n−k encoding shards. In each round of consensus, each original shard and m corresponding encoding shards form a local verification group (m<

IPC Classes  ?

• H04L 67/10 - Protocols in which an application is distributed across nodes in the network
• G06F 16/27 - Replication, distribution or synchronisation of data between databases or within a distributed database systemDistributed database system architectures therefor
• H04L 67/1097 - Protocols in which an application is distributed across nodes in the network for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]

Abstract

The present disclosure provides a security protection method for a sharded blockchain system, and the sharded blockchain system includes one core shard and multiple common shards. A node in the common shard can additionally store historical blocks of other shards in addition to storing historical blocks of the shard in which the node is located. When a single shard in the system is corrupted, the corrupted shard cannot provide a valid verification result for a transaction that the corrupted shard is responsible for verifying. In this case, honest nodes that store historical blocks of the corrupted shard can submit reports on a transaction verification result to the core shard. The core shard confirms validity of the report, and the system performs reward or punishment on the node submitting the report according to whether the report is valid.

IPC Classes  ?

• G06Q 20/38 - Payment protocolsDetails thereof
• G06Q 20/02 - Payment architectures, schemes or protocols involving a neutral third party, e.g. certification authority, notary or trusted third party [TTP]

Abstract

Disclosed is a three-axis Hall angle sensor with an accuracy of 0.3°. The sensor is mainly designed by means of finite element software and COMSOL Multiphysics. The present specification will be mainly performed in three steps. In the first step, a cross-shape horizontal Hall element for measuring the magnetic field in the vertical direction, that is, the direction z, is studied. The second section mainly studies a three-contact four-Hall vertical element for measuring the magnetic field in the directions x, y. The third part is to design the angle sensor. Compared with the horizontal Hall element, the vertical Hall element has a relatively large offset, therefore, four vertical Hall elements are used to measure the magnetic field in the horizontal direction, and two complementary vertical structures are used to eliminate the error when the magnetic field in the same horizontal direction is measured.

IPC Classes  ?

• G01R 33/02 - Measuring direction or magnitude of magnetic fields or magnetic flux
• G01R 33/07 - Hall-effect devices

Abstract

A lateral power semiconductor device is provided and includes a second doping type substrate, a first doping type buried layer, a second doping type epitaxial layer, a first doping type drift area, a second doping type first body area, a first doping type drain area, a first doping type source area, a second doping type second body area, a dielectric layer, a control gate, a body electrode, second doping type polysilicon and first doping type polysilicon. The control gate is led out and connected to different potentials; when the device is in an off state, the control gate is connected to a low potential to assist the drift area in depletion; and when the device is in an on state, the control gate is connected to a high potential, and more carriers are induced on a silicon surface below the control gate.

IPC Classes  ?

• H10D 30/65 - Lateral DMOS [LDMOS] FETs
• H10D 30/60 - Insulated-gate field-effect transistors [IGFET]
• H10D 62/17 - Semiconductor regions connected to electrodes not carrying current to be rectified, amplified or switched, e.g. channel regions
• H10D 64/27 - Electrodes not carrying the current to be rectified, amplified, oscillated or switched, e.g. gates

Abstract

An endoscopic image segmentation method based on a single image and a deep learning network achieves real-time and accurate segmentation for a single case, and provides support for making a treatment plan based on an endoscopic image in clinical medicine. The endoscopic image segmentation method first proposes a single image-based training set generation method to automatically generate a training set, and further proposes a lightweight deep learning network EUnet to perform feature fitting on the generated training set, to achieve endoscopic image segmentation and obtain a segmentation result of a lesion region. The endoscopic image segmentation method can significantly improve segmentation accuracy and has advantages of a small volume, high real-time performance, and easy operation. Especially in processing of endoscopic images of rare cases such as a gastric cancer and an esophageal cancer, the endoscopic image segmentation method has significant advantages in accuracy and speed, and has clinical application value.

IPC Classes  ?

• G06K 9/00 - Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
• G06T 3/4007 - Scaling of whole images or parts thereof, e.g. expanding or contracting based on interpolation, e.g. bilinear interpolation
• G06T 3/60 - Rotation of whole images or parts thereof
• G06T 7/00 - Image analysis
• G06T 7/12 - Edge-based segmentation
• G06T 7/13 - Edge detection
• G06V 10/25 - Determination of region of interest [ROI] or a volume of interest [VOI]
• G16H 30/40 - ICT specially adapted for the handling or processing of medical images for processing medical images, e.g. editing

Abstract

M after performing the gain-offset error correction. Digital correction of sampling data collected from multiple channels in a multi-ADC system is realized while ensuring that respective dynamic ranges of the sampling data with different gains output by the multiple channels are not lost.

IPC Classes  ?

• H03M 1/10 - Calibration or testing
• H03M 1/12 - Analogue/digital converters
• H03M 1/16 - Conversion in steps with each step involving the same or a different conversion means and delivering more than one bit with scale factor modification, i.e. by changing the amplification between the steps
• H03M 1/18 - Automatic control for modifying the range of signals the converter can handle, e.g. gain ranging

Abstract

Disclosed are a method, an apparatus, and a device for predicting adverse drug-drug interactions, and a readable storage medium, and relates to the technical field of pharmaceutical research and development. An objective of the present application is to provide the method, apparatus, and device for predicting adverse drug-drug interactions, and the readable storage medium for solving the above problems. To achieve the above objective, a technical solution adopted by the present application is as follows: acquiring first information; constructing an adverse drug-drug interaction prediction model according to the first information; acquiring second information, where the second information is molecular structure information of two drugs to be predicted; and outputting predicted adverse drug-drug interactions with the second information as an input into the adverse drug-drug interaction prediction model.

IPC Classes  ?

• G16C 20/10 - Analysis or design of chemical reactions, syntheses or processes
• G16C 20/50 - Molecular design, e.g. of drugs

Abstract

A wireless charging apparatus is provided. The apparatus uses a multi-feed, multi-mode, and resonance coherent working mechanism and wirelessly charges an energy receiving apparatus through a focusing field, thereby effectively improving wireless charging efficiency and implementing miniaturization of an energy receiving antenna. The wireless charging apparatus includes a cavity (1) and a phased array antenna. The cavity (1) includes an even number of side faces (2). The even number of side faces (2) are parallel in pairs. Each side face (2) has a capability of reflecting an electromagnetic wave. The phased array antenna includes an antenna array. The antenna array includes a plurality of antennas (3). The plurality of antennas (3) are disposed on the even number of side faces (2) and are configured to emit electromagnetic waves to charge an energy receiving device (4) placed in the cavity (1).

IPC Classes  ?

• H02J 50/23 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 50/00 - Circuit arrangements or systems for wireless supply or distribution of electric power
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/70 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields

Abstract

Provided is an analysis method for determining gas-bearing situation of an unknown shale reservoir, includes: S1, selecting a shale reservoir of a target interval of a place; and collecting data of parameters of cores of each of a known gas-bearing shale reservoir A and a known water-bearing shale reservoir B; S2, calculating average values of the parameters of each of the reservoirs A and B respectively; S3, calculating average differences of the parameters of each of the reservoirs; S4, calculating covariance values of the parameters of each of the reservoirs; S5, establishing, according to the covariance values, an equation group and resolving discriminant coefficients; S6, establishing a discriminant equation according to the discriminant coefficients and solving a discriminant index; and S7, obtaining values of parameters of cores of a sample of the unknown shale reservoir, calculating a discriminant value, and determining gas-bearing situation of the unknown shale reservoir.

IPC Classes  ?

• G06F 17/18 - Complex mathematical operations for evaluating statistical data
• E21B 49/00 - Testing the nature of borehole wallsFormation testingMethods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells

Abstract

r respectively.

IPC Classes  ?

• H04B 7/04 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
• H04L 27/36 - Modulator circuitsTransmitter circuits

Abstract

This invention, falling into the field of radio communication technology, discloses 5G millimeter wave dual-band dual-mode mixer and wireless communication terminal. In the said 5G millimeter wave dual-band dual-mode mixer, the first MOSFET is connected to the source of the second MOSFET and the third MOSFET through its drain, with the first MOSFET connected to the drain of the fourth MOSFET through its drain. The second MOSFET is connected to one end of the first capacitor through its gate, with the other end of the first capacitor connected to the drain of the third MOSFET. The third MOSFET is connected to one end of the second capacitor through its gate and the other end of the second capacitor is connected to the drain of the second MOSFET.

IPC Classes  ?

• H04B 1/16 - Circuits
• H03D 7/14 - Balanced arrangements
• H04B 1/24 - Circuits for receivers in which no local oscillation is generated the receiver comprising at least one semiconductor device having three or more electrodes

Abstract

The present invention belongs to the technical field of 5G millimeter wave communication and discloses a 5G dual-band up-mixer with switching between amplification function and frequency mixing function, and terminal. The first double-balanced active mixer and the second double-balanced active mixer are connected in series, and both ends of the first double-balanced active mixer are connected with a first transformer and a second transformer respectively; both ends of the second double-balanced active mixer are respectively connected with the second transformer and the third transformer; the first double-balanced active mixer is provided with a first MOSFET and a fourth transformer connected with the first MOSFET; the second double-balanced active mixer is provided with a second MOSFET and a fifth transformer connected with the second MOSFET.

IPC Classes  ?

• H03D 7/14 - Balanced arrangements
• H04B 1/00 - Details of transmission systems, not covered by a single one of groups Details of transmission systems not characterised by the medium used for transmission

Abstract

The present disclosure provides a flight anti-collision method and apparatus based on electromagnetic field detection of an overhead transmission line. An example method includes: determining whether an overhead transmission line around is an Alternating Current (AC) transmission line or a (Direct Current) DC transmission line; if the overhead transmission line is an AC transmission line, determining a position relationship between an aircraft and the overhead transmission line on the basis of a phase distribution model and an electric field phase and a magnetic field phase measured by a phase detector on the aircraft; if the overhead transmission line around is a DC transmission line, determining the position relationship between the aircraft and the overhead transmission line on the basis of a magnetic field intensity distribution model and the magnetic field intensities collected by magnetic field intensity sensors on the aircraft; and thus controlling the aircraft.

IPC Classes  ?

• G05D 1/243 - Means capturing signals occurring naturally from the environment, e.g. ambient optical, acoustic, gravitational or magnetic signals
• B64D 45/00 - Aircraft indicators or protectors not otherwise provided for
• G05D 1/622 - Obstacle avoidance
• G05D 109/20 - Aircraft, e.g. drones

Abstract

The embodiments of the present disclosure provide a ranging system of a dual optical frequency comb time-of-flight manner based on dispersive Fourier transform. The embodiment of the present disclosure introduces a dispersive Fourier transform technology into a conventional dual optical frequency comb system, which amplifies a stray relationship of a pulse time domain using a dispersion element and obtains a precise position relationship of three pulses directly through interfering fringe information. Therefore, the “dead zone” in the conventional dual optical frequency comb ranging system is eliminated, and the ranging accuracy of the system is greatly improved, and a repetition frequency difference of the dual optical frequency combs can be increased to a magnitude of MHz, which greatly improves the ranging speed. The ranging system has advantages of a large measurement range, a high measurement accuracy, and a high measurement speed.

IPC Classes  ?

• G01S 7/4865 - Time delay measurement, e.g. time-of-flight measurement, time of arrival measurement or determining the exact position of a peak
• G01S 7/481 - Constructional features, e.g. arrangements of optical elements
• G01S 7/484 - Transmitters
• G01S 17/10 - Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves

Abstract

A random transient power test signal generator based on three-dimensional memristive discrete map, which utilizes a three-dimensional parallel bi-memristor Logistic map module to generate two pseudo-random sequences, and based on the sequences, uses two waveform output modules to generate transient voltage and transient current signals respectively, thus the random transient power testing signal is obtained. The map can significantly improve the complexity of chaos and greatly extend its range of chaos. In addition, a performance evaluation shows the map has more robust hyperchaotic behavior in much larger chaos range. Moreover, the random sequences generated by the map module combines with DDS, which can generate a transient power signal with completely random period, starting phase and ending phase. Thus, a stimulated output of the high-precision transient power testing signal with random characteristic is realized, which makes the development and calibration of high-precision measurement of power meters more convenient.

IPC Classes  ?

• G06F 7/58 - Random or pseudo-random number generators

Abstract

The present invention discloses the method and system for predicting adverse drug-drug interactions by recovering the multi-attribute information of drugs and the medium. The method includes: collecting adverse drug-drug interactions data and multi-attribute data of drugs; constructing the recovery model of multi-attribute absent feature of drugs; correcting the recovery model of multi-attribute absent feature of drugs by the cosine similarity regularization term, and solving the corrected recovery model to obtain the common features and unique features of multi-attribute information of drugs; obtaining the multi-attribute information of two drugs, calculating common features and unique features of their multi-attribute information as the inputs of the prediction model to predict their adverse drug-drug interactions. The present invention improves the accuracy of the prediction of the adverse drug-drug interactions, promotes the experimental study of the adverse drug-drug interactions, and ensures the safety of medication.

IPC Classes  ?

• G16C 20/30 - Prediction of properties of chemical compounds, compositions or mixtures
• G16C 20/70 - Machine learning, data mining or chemometrics

Abstract

A low-complexity panoramic video coding method considering distortion temporal propagation is provided. By analyzing the inter-frame reference relationships under the random access coding structure and establishing the corresponding distortion propagation chain, the method utilizes distortion impact factors of coding units to adjust encoding parameters, thereby optimizing the encoding process. Furthermore, the method addresses the issue of oversampling arising from the varying geometric deformations in different latitude regions during the projection of spherical images in panoramic videos. This is achieved by adjusting coding parameters based on the ratio of area changes at different latitudes. The proposed approach significantly enhances coding performance.

IPC Classes  ?

• H04N 19/149 - Data rate or code amount at the encoder output by estimating the code amount by means of a model, e.g. mathematical model or statistical model
• H04N 19/147 - Data rate or code amount at the encoder output according to rate distortion criteria
• H04N 19/169 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
• H04N 19/172 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a picture, frame or field
• H04N 19/174 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a slice, e.g. a line of blocks or a group of blocks
• H04N 19/597 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding specially adapted for multi-view video sequence encoding

Abstract

A new variable selective etching technology for thick SOI devices. An SOI material is etched by the following steps: (1) providing an SOI wafer; (2) depositing a composite hard mask with a variable selection ratio to replace a traditional hard mask with an invariable selection ratio; (3) applying a photoresist; (4) mask making, namely defining a to-be-etched region by using a photoetching plate; (5) etching the photoresist in the defined region; (6) etching the composite hard mask; (7) removing the photoresist; (8) etching top silicon by using a second etching method at a first selection ratio; and (9) etching a buried oxide layer by using a third etching method at a second selection ratio. The new variable selective etching technology avoids the damage to a side wall of a deep trench when the buried oxide layer is etched, and does not need to use an excessive thick hard mask.

IPC Classes  ?

• H01L 21/033 - Making masks on semiconductor bodies for further photolithographic processing, not provided for in group or comprising inorganic layers
• H01L 21/02 - Manufacture or treatment of semiconductor devices or of parts thereof
• H01L 21/027 - Making masks on semiconductor bodies for further photolithographic processing, not provided for in group or
• H01L 21/311 - Etching the insulating layers
• H01L 21/3205 - Deposition of non-insulating-, e.g. conductive- or resistive-, layers, on insulating layersAfter-treatment of these layers
• H01L 21/3213 - Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer

Abstract

A multiple-access constant envelope orthogonal frequency division multiplexing (OFDM) method and wireless communication system are disclosed. The method and system include a transmitter that sequentially processes the information and/or information bits of each user by digital modulation, symmetric mapping, frequency-domain to time-domain transformation, phase modulation, time-domain to frequency-domain transformation, frequency domain offsetting, frequency-domain to time-domain transformation, and cyclic prefix addition to obtain a baseband transmission signal, which is then sent to one or more receivers through a channel, and a receiver that sequentially processes the received signal by time-domain to frequency-domain transformation, user signal separation, equalization offsetting, frequency-domain to time-domain transformation, phase demodulation, another time-domain to frequency-domain transformation, demapping, and decision-making to obtain detection results for the corresponding user. The present method and system reduce data overlap between users and decrease inter-user interference by applying different phase rotations and/or different offsets to different users, thereby enhancing system performance.

IPC Classes  ?

• H04L 25/02 - Baseband systems Details
• H04L 5/00 - Arrangements affording multiple use of the transmission path

Abstract

A calibration concentration selection method includes steps of: using a gas sensor array to obtain a concentration variation sequence and a response variation sequence of the gas mixture; constructing and training an AE-BP model; constructing VAE and identically distributing the response variation sequence; inputting the identically distributed response variation sequence into the trained AE-BP model to output a predicted concentration variation sequence; and then normalizing the predicted concentration variation sequence to generate a target concentration variation sequence; sorting a target concentration variation sequence and calculating a response gradient sequence; processing the response gradient sequence for obtaining a corresponding smoothed gradient sequence; if the spike is greater than a preset hyperparameter, finding a large gradient concentration interval; and selecting concentration test points by random uniform sampling according to weights; and selecting concentration test points from all other concentration intervals in the smoothed gradient sequence by random uniform sampling.

IPC Classes  ?

• G01N 33/00 - Investigating or analysing materials by specific methods not covered by groups

Abstract

A system for real-time target identification of an unmanned aerial vehicle (UAV) based on an embedded technique and an improved YOLO4 algorithm, and relates to the field of real-time target detection is disclosed. The system for real-time target identification of a UAV based on an embedded technique and an improved YOLO4 algorithm abandons a conventional “one-to-one” mode, and can be used for a plurality of UAV data processing applications, and multiple users in different geographical locations can further remotely manage and control the system. Particularly, in a target identification client of the present disclosure, to obtain a better real-time identification effect, a YOLOv4 target identification algorithm is improved, so that a better identification result and a faster identification speed are obtained.

IPC Classes  ?

• G06T 7/20 - Analysis of motion
• B64C 39/02 - Aircraft not otherwise provided for characterised by special use
• G06V 10/94 - Hardware or software architectures specially adapted for image or video understanding
• G06V 20/17 - Terrestrial scenes taken from planes or by drones
• H04N 23/661 - Transmitting camera control signals through networks, e.g. control via the Internet
• H04N 23/667 - Camera operation mode switching, e.g. between still and video, sport and normal or high and low resolution modes
• H04W 4/029 - Location-based management or tracking services
• B64U 101/30 - UAVs specially adapted for particular uses or applications for imaging, photography or videography

Abstract

A homogenization field device with low specific on-resistance based on multidimensional coupled voltage dividing mechanism includes a first conductive type semiconductor substrate, a first conductive type well region, a first conductive type semiconductor contact region, a second conductive type drift region, a second conductive type well region, a second conductive type semiconductor contact region, a first dielectric oxide layer, a second dielectric oxide layer, a third dielectric oxide layer, a fourth dielectric oxide layer, a polycrystalline silicon electrode of a floating field plate, a polycrystalline silicon electrode of a control gate, a first layer of metal strips and a second layer of metal strips. The first dielectric oxide layer and the polycrystalline silicon electrode of the floating field plate form a vertical floating field plate, and the first layer of metal strips, the second layer of metal strips and the fourth dielectric oxide layer form a surface fixed dielectric capacitor.

IPC Classes  ?

• H01L 29/40 - Electrodes
• H01L 29/423 - Electrodes characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched

Abstract

t with a trace of density matrices in the conditional quantum master equation; and replacing the parameter (W, b) with a connection between density matrices in the conditional quantum master equation at imminent moments.

IPC Classes  ?

• G06N 3/04 - Architecture, e.g. interconnection topology
• G06N 3/0442 - Recurrent networks, e.g. Hopfield networks characterised by memory or gating, e.g. long short-term memory [LSTM] or gated recurrent units [GRU]
• G06N 10/20 - Models of quantum computing, e.g. quantum circuits or universal quantum computers

Abstract

A high-dimensional signal transmission method is provided. The method generates M M-dimensional first signals on the basis of M original signals and generates M M-dimensional second signals on the basis of a precoding signal and of the first signals, and finally, a transmitter sums all of the second signals and then transmits by utilizing M subchannels. As such, each subchannel carries information of the M original signals; hence, when any subchannel experiences deep fading, the deep fading is shared jointly by M signals, thus preventing the deep fading from causing a particularly severe impact on any signal. Moreover, all of the original signals can be recovered by utilizing the signals on the other subchannels, thus increasing the systematic resistance against subchannel deep fading. Meanwhile, the system implements the parallel transmission of the M original signals, thus ensuring the throughput of a communication system.

IPC Classes  ?

• H04B 7/0456 - Selection of precoding matrices or codebooks, e.g. using matrices for antenna weighting
• H04L 5/00 - Arrangements affording multiple use of the transmission path
• H04L 25/03 - Shaping networks in transmitter or receiver, e.g. adaptive shaping networks

Abstract

A circuit and method for simulating real-time reconfigurable general-purpose memristor, nonlinear m-order polynomial fitting of mathematical model of a memristor is performed by using McLaughlin formula. m is related to the amplitude and frequency of an input signal and the fitting accuracy, thus the mathematical model of a memristor can be easily and quickly adapted by updating the polynomial order, the polynomial coefficients and the FPGA system clock cycle. Based on the FPGA, a system state variable generation module, a FIFO, a output module are used to obtain an output signal y[n]. the detailed steps of signal processing and displaying are given to obtain a display of a pinched hysteresis loop and a waveform display of time-domain. Simulation of high frequency memristor by setting polynomial coefficients can be obtained. Meanwhile, this is built based on FPGA, adopt digital circuit to simulates a reconfigurable general-purpose memristor, and experimental accuracy is enhanced.

IPC Classes  ?

• G06F 30/347 - Physical level, e.g. placement or routing
• H03K 19/177 - Logic circuits, i.e. having at least two inputs acting on one outputInverting circuits using specified components using elementary logic circuits as components arranged in matrix form

Abstract

A hierarchical proxy deployment method includes: performing information collection and information interaction in a hierarchical proxy deployment architecture to obtain bandwidths and latencies of all inter-node communication links; and selecting an optimal proxy deployment solution from all feasible proxy deployment solutions based on the bandwidths and latencies of all the inter-node communication links. According to the method, a hierarchical proxy deployment architecture is used. An optimal proxy deployment solution is formed by selecting the optimal location and the optimal number of proxies for deployment to meet the transmission performance requirement of network applications in 5G/B5G networks. Therefore, transmission performance requirements are satisfied by a proxy deployment with a minimized number of proxies, thereby reducing network overheads and resource waste.

IPC Classes  ?

• H04W 24/02 - Arrangements for optimising operational condition
• H04W 24/10 - Scheduling measurement reports
• H04W 88/18 - Service support devicesNetwork management devices

Abstract

A random phase modulation method depending on a communication distance is provided. In the method, time synchronization is carried out by means of a transmitter and a receiver, a local random signal is generated, and an original signal to be sent is pre-coded according to a transmission delay and the generated local random signal, such that random phase modulation depending on a communication distance is realized, potential security brought about by positions of the transmitter and the receiver is fully utilized, a receiver at an expected distance position can receive a signal with a correct phase, and a receiver at another distance position receives a signal with a scrambled phase, thereby improving the secure communication capability of a wireless communication system in terms of the dimension of space.

IPC Classes  ?

• H04K 1/00 - Secret communication

Abstract

The present invention provides a method for optimizing the energy efficiency of wireless sensor network based on the assistance of unmanned aerial vehicle, firstly, collecting the state of the WSN through current routing scheme, and inputting the state of the WSN into the decision network of the agent to determine a next hover node; Secondly, based on the location of the next hover node, generating a new routing scheme by the UAV, and sending each sensor node's routing to its corresponding sensor node through current routing by the UAV; Lastly, after all sensor nodes have received their routings respectively, all sensor nodes send their collected data to the hover node through their routings respectively, and the UAV flies to and hovers above the next hover node to collect data through the next hover node, thus the data collection of the whole WSN is completed. Considering that the amounts of data forwarded by the sensor nodes are different, the rates of energy consumptions of the sensor nodes are also different, an online determination of the data collection scheme is adopted. When the residual energies of the sensor nodes relatively have changed, the UAV needs to determine a next hover node and generate a new routing scheme according to current state of the WSN, thus the energy efficiency of wireless sensor network is optimized and the lifetime of the WSN is maximized.

IPC Classes  ?

• H04W 40/10 - Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources based on available power or energy
• H04W 40/20 - Communication route or path selection, e.g. power-based or shortest path routing based on geographic position or location

Abstract

A spatial position-dependent I/Q domain modulation method, dual domain modulation method and multiple access communication method are provided. The methods eliminate the dependence of physical layer secure communication on channel state information, and realize the function that a receiver at an expected position can communicate normally, while an eavesdropper at other positions cannot receive a signal or can only receive a wrong signal. The security capability of a wireless communication system is improved from the spatial dimension. The multiple access communication method can realize the distinguishing of multiple users according to precise spatial position points. Even if a plurality of users are located in the same sector in an angular domain, as long as the spatial positions of these users are different, the method can be used to perform multiple access communication, thereby further improving the spatial multiplexing rate of the system and increasing the system capacity.

IPC Classes  ?

• H04L 27/28 - Systems using multi-frequency codes with simultaneous transmission of different frequencies each representing one code element
• H04J 3/06 - Synchronising arrangements
• H04L 27/00 - Modulated-carrier systems
• H04W 56/00 - Synchronisation arrangements

Abstract

A high-dimensional non-orthogonal transmission method is provided. In the method, signals of various users are mapped to form high-dimensional signals, and the high-dimensional signals are pre-coded, such that non-orthogonal transmission is realized in a higher dimension. Moreover, different users perform matched receiving on respective signals, and non-orthogonal transmission signals can be recovered merely by means of a receiver with a linear complexity. By means of the method, multi-user data non-orthogonal transmission can be realized without depending on conditions such as user pairing and collaboration, and various users do not need to perform iterative feedback, such that the detection complexity of non-orthogonal multi-user signals is significantly reduced.

IPC Classes  ?

• H04L 1/00 - Arrangements for detecting or preventing errors in the information received
• H04B 17/336 - Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]

Abstract

A phase domain modulation method dependent on a spatial position is provided. The method mainly includes the following steps: a transmitter and a receiver perform time synchronization to obtain a synchronization time; the transmitter performs a phase domain precoding operation on an original signal to obtain a phase domain pre-coded signal; the receiver receives the phase domain pre-coded signal, obtains a phase domain initial reception signal, and performs a phase domain matching operation on the phase domain initial reception signal to obtain an estimation of the original signal.

IPC Classes  ?

• H04L 27/18 - Phase-modulated carrier systems, i.e. using phase-shift keying
• H04W 56/00 - Synchronisation arrangements

Abstract

A random transient power test signal generator based on three-dimensional memristive discrete map, which utilizes a three-dimensional parallel bi-memristor Logistic map module to generate two pseudo-random sequences, and based on the two pseudo-random sequences, uses two waveform output modules to generate a transient voltage signal and a transient current signal respectively, thus the random transient power testing signal is obtained.

IPC Classes  ?

• G01R 35/04 - Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current

Abstract

The disclosure relates to mixed analog-digital circuits, and more specifically a low-noise millimeter-wave fractional-N frequency synthesizer. It overcomes quantization noise and fractional spurs caused by the limited dynamic range and nonlinearity of time error amplifiers (TA) in traditional phase-locked loop structures based on TA. In addition to the traditional structure, the synthesizer includes a coarse digital-to-time converter (CDTC), a fine digital-to-time converter (FDTC), and DTC non-linearity calibration circuits. By inserting the CDTC and FDTC before and after the TA, respectively, the variance of the input phase difference of the TA can be reduced, thereby improving the TA linearity and suppressing the quantization noise and spur generated by fractional-N operation. Furthermore, by using non-linearity calibration, the non-linearity of DTC and TA can be compensated to avoid large quantization noise and spur while the second order quantization noise reshaping is maintained. Furthermore, a high-gain TA can increase the resolution of the FDTC.

IPC Classes  ?

• H03L 7/197 - Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division
• H03L 7/093 - Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using special filtering or amplification characteristics in the loop

Abstract

A multi-band, shared-aperture, circularly polarized phased array antenna relating to the field of antenna technology is disclosed. Specifically, two multi-band, shared-aperture, circularly polarized phased array antenna designs are disclosed. By integrating multiple circularly polarized endfire antennas with different operation bands into one aperture, a shared-aperture antenna array is achieved. The bandwidth and crossband port isolation of this antenna are enhanced, and the antenna also has the properties of miniaturization, feasibility, and ease of connection with circuits.

IPC Classes  ?

• H01Q 9/04 - Resonant antennas
• H01Q 3/36 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elementsArrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture varying the phase by electrical means with variable phase-shifters
• H01Q 21/00 - Antenna arrays or systems
• H01Q 21/06 - Arrays of individually energised antenna units similarly polarised and spaced apart

Abstract

A termination structure of a super-junction power device has a novel polysilicon resistive field plate at the top of a termination region between a transition region and an edge of the device. By utilizing the regular distribution of potential in the field plate, an additional electric field is introduced at the top of the termination structure to limit the expansion of a non-depletion region and optimize the distribution of charges. The termination structure includes a first doping type epitaxial layer, a second doping type compensation region, a second doping type body region, a second doping type lateral connection layer, a second doping type body contact region, a first doping type source contact region, a gate oxide layer, a passivation layer, a field oxide layer, a gate electrode, a second doping type edge contact region, a polysilicon resistive field plate, a metal layer and the like.

IPC Classes  ?

• H10D 30/66 - Vertical DMOS [VDMOS] FETs
• H10D 62/10 - Shapes, relative sizes or dispositions of the regions of the semiconductor bodiesShapes of the semiconductor bodies
• H10D 64/00 - Electrodes of devices having potential barriers

Abstract

The present invention provides a method for robot assisted multi-view 3D scanning measurement based on path planning. Firstly, establishing a virtual simulation platform to complete the setting of measurement poses and measurement paths and perform the path evaluations of measurement paths, which improves the measurement efficiency and guarantees the measurement safety. Then, completing the preliminary hand-eye calibration based on the properties of Kronecker product, which reduces the system noise in the process of calibration and the error influence caused by the calculation, and the preliminary hand-eye calibration is optimized by establishing a reprojection error cost function as the fitness function of the particle swarm optimization algorithm, which further improves the accuracy of hand-eye calibration and guarantees the registration quality of single-view point cloud. Lastly, moving the robot in turn to the measurement poses of the planned measurement paths, obtaining a single-view point cloud of the measured object and transforming it from the camera coordinate system to the robot base coordinate system to obtain a registered single-view point cloud based on the optimized hand-eye matrix. when registered single-view point clouds of all measurement poses are obtained, the points under the robot base coordinate system form a complete point cloud of the measured object, the 3D the measurement is completed.

IPC Classes  ?

• G06F 17/00 - Digital computing or data processing equipment or methods, specially adapted for specific functions
• B25J 9/16 - Programme controls
• B25J 19/02 - Sensing devices

Abstract

A multi-level gate driver applied to the SiC metal-oxide-semiconductor field-effect transistor (MOSFET) includes three parts: the SiC MOSFET information detection circuit, the signal level shifting circuit, and the segmented driving circuit. The SiC MOSFET information detection circuit includes the SiC MOSFET drain-source voltage detection circuit and the SiC MOSFET drain-source current detection circuit. The segmented driving circuit includes a turn-on segmented driving circuit and a turn-off segmented driving circuit. The SiC MOSFET drain-source voltage detection circuit and the SiC MOSFET drain-source current detection circuit process a drain-source voltage and a drain-source current during the SiC MOSFET's switching as enable signals for segmented driving; the signal level shifting circuit transfers enable signals required by the segmented driving circuit to the suitable power supply rail; and the SiC MOSFET turn-on segmented driving circuit and the turn-off segmented driving circuit select suitable driving currents.

IPC Classes  ?

• H01L 29/16 - Semiconductor bodies characterised by the materials of which they are formed including, apart from doping materials or other impurities, only elements of Group IV of the Periodic System in uncombined form
• H01L 29/06 - Semiconductor bodies characterised by the shapes, relative sizes, or dispositions of the semiconductor regions
• H01L 29/66 - Types of semiconductor device
• H01L 29/78 - Field-effect transistors with field effect produced by an insulated gate

Abstract

The present invention discloses a hollow fiber membrane material for a high-humidification hydrogen fuel cell humidifier and a preparation method and application thereof, and belongs to the technical field of fuel cell materials. The present invention provides a hollow fiber membrane material, and the preparation method includes: mixing and dissolving sulfonated polyarylene ether nitrile resin, a pore-forming agent, a modified nano-filler and a solvent for still standing; performing vacuumizing; coagulating a spinning fluid in an internal coagulant bath and an external coagulant bath; and washing and drying an obtained crude product to obtain the hollow fiber membrane material.

IPC Classes  ?

• D01D 5/24 - Formation of filaments, threads, or the like with a hollow structureSpinnerette packs therefor
• H01M 8/04119 - Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyteHumidifying or dehumidifying
• D01D 5/06 - Wet spinning methods

Abstract

2 is grounded.

IPC Classes  ?

• H03F 1/42 - Modifications of amplifiers to extend the bandwidth
• H03F 1/32 - Modifications of amplifiers to reduce non-linear distortion
• H03F 3/24 - Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages

Abstract

A network emulation system supporting a flexible and efficient dynamic experiment emulates a network based on container, veth-pair, traffic control (TC), and other technologies and sets a network state management model based on a key-value pair, thereby constructing a network emulation system supporting a flexible and efficient dynamic experiment. The system flexibly realizes the dynamic performance of a plurality of dimensions, namely, dynamic node start/stop, dynamic node attribute configuration, dynamic link start/stop, and dynamic link attribute configuration. Based on the network state management model, the network emulation system provides a concise and unified dynamic application programming interface (API) for an upper layer. Researchers can call the API in their network innovation programs at any time after an emulation network is deployed to achieve efficient, batch-processing, and programmable dynamic management. The network emulation system greatly facilitates the experimental work of the researchers in a dynamic scenario of the network.

IPC Classes  ?

• G06F 15/173 - Interprocessor communication using an interconnection network, e.g. matrix, shuffle, pyramid, star or snowflake
• H04L 41/14 - Network analysis or design
• H04L 43/55 - Testing of service level quality, e.g. simulating service usage

Abstract

A method of reducing or rejecting common mode interference and a circuit for electromagnetic induction logging with improved common mode interference reduction or rejection are disclosed, which are useful in the field of electromagnetic induction logging technology. Accurate formation signals are calculated based on phases and amplitudes of common mode signals, which do not change with the coil access mode, and phases of differential signals, which are reversed with amplitudes unaltered when the coil is connected reversely. This provides a mechanism to effectively eliminate the influence of common mode interference even when the common mode interference is greater in amplitude than the signals from a geological formation.

IPC Classes  ?

• G01V 3/28 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation specially adapted for well-logging operating with magnetic or electric fields produced or modified either by the surrounding earth formation or by the detecting device using induction coils
• G01V 3/30 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation specially adapted for well-logging operating with electromagnetic waves

Abstract

The invention discloses a bearings-only target tracking method based on pseudo-linear maximum correlation entropy Kalman filtering, which introduces the correlation entropy function into pseudo-linear Kalman filtering to solve the problem of non-Gaussian noise. A bearings-only target tracking algorithm based on pseudo-linear maximum correlation entropy Kalman filtering is also proposed. The invention combines the maximum correlation entropy theory with pseudo-linear Kalman filtering, and the target tracking accuracy is higher and divergence can be avoided when working in a non-Gaussian environment.

IPC Classes  ?

• G06F 17/15 - Correlation function computation
• G06F 17/18 - Complex mathematical operations for evaluating statistical data
• G06F 17/16 - Matrix or vector computation

Abstract

The present disclosure provides a GaAs monolithic integrated terahertz low-noise communication system transceiver front-end, including an intermediate frequency circuit and a terahertz circuit. The terahertz circuit includes a local oscillator frequency tripler, a local oscillator unidirectional 3 dB filter coupler, a radio frequency 180° filter coupler, and two terahertz GaAs monolithic integrated subharmonic mixers. The local oscillator unidirectional 3 dB filter coupler and the radio frequency 180° filter coupler each include one ring-cylindrical resonant cavity and four rectangular waveguides. The ring-cylindrical resonant cavity is divided into four rectangular waveguides which are correspondingly connected to the four sector-annular resonant cavities, respectively. The present disclosure suppresses the local oscillator noise by adopting a local oscillator unidirectional 3 dB filter coupler and a radio frequency 180° filter coupler with both coupling and filtering functions, thereby achieving a low local oscillator noise transceiver front-end.

IPC Classes  ?

• H04B 1/40 - Circuits
• H03D 7/16 - Multiple frequency-changing

Abstract

A terahertz full-duplex co-local oscillator solid-state front-end transmitting circuit is disclosed, which belongs to the technical field of terahertz communication. The overall structure of the solid-state front-end transmitting circuit adopts a new system, wherein the circuit comprises two branches that are parallel and driven by a local oscillator source. A branched waveguide directional coupler is configured to output two driving signals provided by the same local oscillator source respectively to two branch circuits with required powers. Two transmission signals generated from the two branches are combined into one signal for transmission through an orthogonal mode coupled duplexer, so as to fulfill the construction of a full-duplex co-local oscillator solid-state front-end transmission circuit.

IPC Classes  ?

• H04B 1/04 - Circuits
• H01Q 13/08 - Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
• H04B 1/03 - Constructional details, e.g. casings, housings
• H04L 5/14 - Two-way operation using the same type of signal, i.e. duplex

Abstract

The present disclosure provides a hetero-integrated terahertz low-noise miniaturized image frequency rejection transceiver front-end, including an intermediate frequency circuit and a terahertz circuit arranged up and down, where the terahertz circuit includes a local oscillator frequency tripler, a 135° 3 dB filter coupler, a radio frequency waveguide power divider, and two quartz hetero-integrated subharmonic mixers; resonant cavities of an input unit, a first output unit, an isolation unit, and a second output unit of the 135° 3 dB filter coupler are sequentially coupled through resonant grooves to form a ring structure, a cavity length of the resonant cavity of the input unit is twice that of the resonant cavities of the other three units, and an electrical length of a waveguide of the first output unit is 45° different from that of a waveguide of the second output unit.

IPC Classes  ?

• H04B 1/40 - Circuits
• H03D 7/16 - Multiple frequency-changing

Abstract

i, i=1, 2, . . . , A of the cooperative routing decision system, deploys the to-be-deployed wireless sensor network into an environment and updates the routing policy of the deployed wireless sensor network at each update cycle of routing.

IPC Classes  ?

• H04L 45/02 - Topology update or discovery
• H04W 40/10 - Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources based on available power or energy
• H04W 40/24 - Connectivity information management, e.g. connectivity discovery or connectivity update

Abstract

A bidirectional conduction trench gate power MOS device and a manufacturing method thereof are provided. A gate electrode, a source electrode and a drain electrode are formed on a surface of a silicon wafer to realize a bidirectional conduction and bidirectional blocking power MOS device used in an application environment such as lithium battery BMS protection. A device structure of the bidirectional conduction trench gate power MOS device has advantages compared with double-transistor series connection used in a conventional BMS and other structures for realizing a bidirectional conduction: firstly, the bidirectional conduction trench gate power MOS device needs to occupy half or less area compared with a conventional mode, improving a degree of integration; secondly, the device structure has a simple manufacturing process and a low manufacturing cost reducing manufacturing problems; thirdly, the drain electrode and the source electrode of the device structure are exchanged to realize a symmetrical structure.

IPC Classes  ?

• H10D 30/66 - Vertical DMOS [VDMOS] FETs
• H01L 21/265 - Bombardment with wave or particle radiation with high-energy radiation producing ion implantation
• H01L 21/266 - Bombardment with wave or particle radiation with high-energy radiation producing ion implantation using masks
• H01L 21/761 - PN junctions
• H10D 30/01 - Manufacture or treatment
• H10D 62/10 - Shapes, relative sizes or dispositions of the regions of the semiconductor bodiesShapes of the semiconductor bodies
• H10D 62/17 - Semiconductor regions connected to electrodes not carrying current to be rectified, amplified or switched, e.g. channel regions
• H10D 64/00 - Electrodes of devices having potential barriers

Abstract

A moving target focusing method and system based on a generative adversarial network are provided. The method includes: generating, using a Range Doppler algorithm, a two-dimensional image including at least one defocused moving target, as a training sample; generating at least one ideal Gaussian point in a position of at least one center of the at least one defocused moving target in the two-dimensional image, to generate a training label; constructing the generative adversarial network, the generative adversarial network includes a generative network and a discrimination network; inputting the training sample and the training label into the generative adversarial network to perform repeated training until an output of the generative network reaches a preset condition, to thereby obtain a trained network model; and inputting a testing sample into the trained network model, to output a moving target focused image.

IPC Classes  ?

• G06K 9/00 - Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
• G06T 7/20 - Analysis of motion

Abstract

0m(n+δ) mode dielectric resonator; the calibration component and the dielectric conductor test sample are mounted on the test platform to measure corresponding quality factors, thereby calculating the microwave surface resistance of the deposition interface of the dielectric conductor test sample. The present invention requires no pre-measurement of relative permittivity and loss tangent of the dielectric conductor test sample. After calibration, the microwave surface resistance of the dielectric conductor deposition interface can be obtained by only one non-destructive measurement.

IPC Classes  ?

• G01R 27/26 - Measuring inductance or capacitanceMeasuring quality factor, e.g. by using the resonance methodMeasuring loss factorMeasuring dielectric constants

Abstract

A method for manufacturing a semiconductor device is provided. A drift region and a compensation region are formed through a deep trench etching and a filling technology. A plurality of modulation doping regions are formed at a top of the drift region by an epitaxy and an ion implantation. A modulation region is introduced, wherein the modulation region flexibly modifies capacitance characteristics and achieve improved dynamic characteristics.

IPC Classes  ?

• H01L 21/265 - Bombardment with wave or particle radiation with high-energy radiation producing ion implantation
• H01L 21/266 - Bombardment with wave or particle radiation with high-energy radiation producing ion implantation using masks
• H01L 21/761 - PN junctions
• H10D 30/01 - Manufacture or treatment
• H10D 30/66 - Vertical DMOS [VDMOS] FETs
• H10D 62/10 - Shapes, relative sizes or dispositions of the regions of the semiconductor bodiesShapes of the semiconductor bodies
• H10D 62/17 - Semiconductor regions connected to electrodes not carrying current to be rectified, amplified or switched, e.g. channel regions

Abstract

A DC-DC converter circuit with selectable working modes is disclosed. Compared with the traditional chip that works in one mode, the DC-DC converter with selectable working modes adds only a mode selection circuit, so that the chip can work in voltage control mode or current control mode. On the one hand, the applications of the chip are more extensive, and on the other hand, when the applications are different, the cost of developing a DC-DC converter with selectable working mode is greatly reduced compared with the traditional DC-DC converter.

IPC Classes  ?

• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H02M 1/00 - Details of apparatus for conversion
• H02M 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters

Abstract

Methods and systems of synchronous sending are described for state sharing of UAV teams. Most state data of UAV is nonstationary time series, the state data collected or perceived by sensors of UAV is segmented automatically with changepoint detection methods in real time. Each segment is sliced non-uniformly, and all the data of each slice is summarized. The summary result of each slice is finally sent for sharing among UAV teams. The changing of state generation parameters of UAV flight or working can be discovered and the segments are non-uniformly sliced automatically in the invention. The shared data is sent in time when the state changes irregularly while it is sent at large intervals when the state changes regularly. The invention reduces the number of sending substantially and then decreases the bandwidth consumption of state sharing of UAV teams, without decreasing the real time of state sharing.

IPC Classes  ?

• H04L 65/80 - Responding to QoS
• H04L 43/04 - Processing captured monitoring data, e.g. for logfile generation
• H04W 56/00 - Synchronisation arrangements

Abstract

conductivity type, a first region doped with the first conductivity type, a second region doped with the second conductivity type, N first oxide layers and K second oxide layers. The second region is located above the second drain region. The first region is located above the drain region and at a side of the second region. The source region is located above the first region and the second region. The first oxide layers are located at a side in the second region close to the source region. The second oxide layers are located at a side in the first region close to the drain region.

IPC Classes  ?

• H10D 62/10 - Shapes, relative sizes or dispositions of the regions of the semiconductor bodiesShapes of the semiconductor bodies

Abstract

A three-dimensional carrier stored trench IGBT and a manufacturing method thereof are provided. A P-type buried layer and a split gate electrode with equal potential to an emitter metal is introduced on the basis of the traditional carrier stored trench IGBT, which can effectively eliminate the influence of an N-type carrier stored layer on breakdown characteristics of the device through the charge compensation, and at the same time can reduce the on-state voltage drop and improve the trade-off relationship between the on-state voltage drop Vceon and the turn-off loss Eoff. The split gate electrodes is introduced in the Z-axis direction, so that the gate electrodes are distributed at intervals. Therefore, the channel density is reduced. The turning on of the parasitic PMOS has a potential-clamping effect on the NMOS channel, so that the saturation current can be reduced and a wider short-circuit safe operating area (SCSOA) can be obtained.

IPC Classes  ?

• H10D 62/10 - Shapes, relative sizes or dispositions of the regions of the semiconductor bodiesShapes of the semiconductor bodies
• H10D 12/00 - Bipolar devices controlled by the field effect, e.g. insulated-gate bipolar transistors [IGBT]
• H10D 12/01 - Manufacture or treatment
• H10D 62/13 - Semiconductor regions connected to electrodes carrying current to be rectified, amplified or switched, e.g. source or drain regions
• H10D 62/17 - Semiconductor regions connected to electrodes not carrying current to be rectified, amplified or switched, e.g. channel regions
• H10D 84/85 - Complementary IGFETs, e.g. CMOS
• H10D 88/00 - Three-dimensional [3D] integrated devices

Abstract

A split gate carrier stored trench bipolar transistor (CSTBT) with current clamping PMOS include a P-type buried layer and a split gate electrode with equal potential to an emitter metal on the basis of the traditional CSTBT, which effectively eliminates the influence of an N-type carrier stored layer on breakdown characteristics of the device through the charge compensation effect, and helps to improve the trade-off relationship between the on-state voltage drop and the turn-off loss. Moreover, the introduction of a parasitic PMOS structure can reduce the saturation current and improve short-circuit safe operating area of the device, reduce the Miller capacitance, and improve the switching speed of the device and reduce the switching loss of the device. In addition, the split gate CSTBT integrating the split gate electrode and gate electrode in the same trench can shorten the distance between PMOS and NMOS channels.

IPC Classes  ?

• H10D 12/00 - Bipolar devices controlled by the field effect, e.g. insulated-gate bipolar transistors [IGBT]
• H01L 21/761 - PN junctions
• H01L 21/765 - Making of isolation regions between components by field-effect
• H10D 12/01 - Manufacture or treatment
• H10D 62/10 - Shapes, relative sizes or dispositions of the regions of the semiconductor bodiesShapes of the semiconductor bodies
• H10D 62/17 - Semiconductor regions connected to electrodes not carrying current to be rectified, amplified or switched, e.g. channel regions
• H10D 64/00 - Electrodes of devices having potential barriers

Abstract

The present disclosure provides a student performance evaluation method and system based on artificial intelligence (AI) identification data, and relates to the field of intelligent education. A lightweight network model suitable for student performance evaluation takes the AI identification data as an input and evaluation results as an output. A training data generation algorithm is provided, and multidimensional AI identification data and labels are uniformly processed into training data suitable for the network model through the above algorithm, which can solve the problems that dimensions between any AI identification data and various labels are not uniform, and original data cannot meet training of a multidimensional and cross-time prediction model. A simulated data generation algorithm and a simulated label generation algorithm are provided, and simulated training data is generated using these algorithms in conjunction with the training data generation algorithm.

IPC Classes  ?

• G06N 20/00 - Machine learning
• G09B 19/00 - Teaching not covered by other main groups of this subclass

Abstract

A dynamic network resource allocation method based on network slicing is provided. A historical resource demand dataset of an accessed network slice is inputted into a first neural network for training. Based on a trained first neural network and the historical resource demand of the accessed network slice, a resource demand prediction information corresponding to the accessed network slice in a first prediction time period is determined. Resources are pre-allocated to the accessed network slice based on the resource demand prediction information, and resources are allocated to the accessed network slice when the first prediction time period arrives. In this way, the service provider can reasonably allocate network resources for network slices without violating the SLA, thus avoiding the waste of network resources.

IPC Classes  ?

• H04L 41/147 - Network analysis or design for predicting network behaviour
• H04L 47/83 - Admission controlResource allocation based on usage prediction

Abstract

An SOI lateral homogenization field high voltage power semiconductor device, and a manufacturing method and application thereof are provided. The device includes a type I conductive semiconductor substrate, a type II conductive drift region, a type I field clamped layer, type I and type II conductive well regions, the first dielectric oxide layer forming a field oxide layer, the second dielectric oxide layer forming a gate oxide layer, a type II conductive buried dielectric layer, a type II conductive source heavily doped region, a type II conductive drain heavily doped region. The first dielectric oxide layer and the floating field plate polysilicon electrodes form a vertical floating field plate distributed throughout the type II conductive drift region to form a vertical floating equipotential field plate array. When the device is in on-state, high doping concentration can be realized by the full-region depletion effect form the vertical field plate arrays.

IPC Classes  ?

• H01L 29/06 - Semiconductor bodies characterised by the shapes, relative sizes, or dispositions of the semiconductor regions
• H01L 29/40 - Electrodes
• H01L 29/66 - Types of semiconductor device
• H01L 29/739 - Transistor-type devices, i.e. able to continuously respond to applied control signals controlled by field effect
• H01L 29/78 - Field-effect transistors with field effect produced by an insulated gate

Abstract

A reverse time migration imaging method for cased-hole based on ultrasonic pitch-catch measurement, including: calculating a theoretical dispersion curve; expanding original Lamb data of two receivers into array waveform data based on phase-shift interpolation; establishing a two-dimensional migration velocity model including density, P-wave velocity and S-wave velocity of a target area; generating and storing a forward propagating ultrasonic wavefield for each time step; reversing a time axis; generating and storing a reversely propagating ultrasonic Lamb wavefield for the two receivers after phase-shift interpolation; calculating envelopes of the forward propagating ultrasonic Lamb wavefield and the reversely propagating ultrasonic Lamb wavefield; applying a zero-lag cross-correlation imaging condition to obtain reverse time migration imaging results; and applying Laplace filtering to suppress low-frequency imaging noises in the imaging results.

IPC Classes  ?

• E21B 47/005 - Monitoring or checking of cementation quality or level
• E21B 47/14 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves
• G01V 1/50 - Analysing data

Abstract

A reverse blocking gallium nitride (GaN) high electron mobility transistor includes, sequentially stacked from bottom to top, a substrate, a nucleation layer, a buffer layer, a barrier layer, a dielectric layer. The buffer layer and the barrier layer form a heterojunction structure. The barrier layer is provided with at least two p-GaN structures. The barrier layer is provided with a source metal at one end and a drain metal at the other end, source metal forms ohmic contact and drain metal forms Schottky contact with AlGaN barrier, respectively. In forward conduction, the two-dimensional electron gas below the spaced p-GaN structure connected to the drain metal is conductive, and a turn-on voltage of the device is low. During reverse blocking, the two-dimensional electron gas at the spaced p-GaN structure is rapidly depleted under reverse bias, to form a depletion region, so that the blocking capability of the device is improved.

IPC Classes  ?

• H01L 29/20 - Semiconductor bodies characterised by the materials of which they are formed including, apart from doping materials or other impurities, only AIIIBV compounds
• H01L 29/66 - Types of semiconductor device
• H01L 29/778 - Field-effect transistors with two-dimensional charge carrier gas channel, e.g. HEMT
• H01L 29/06 - Semiconductor bodies characterised by the shapes, relative sizes, or dispositions of the semiconductor regions

Abstract

Embodiments of the present disclosure provide a quantitative method and system for attention based on a line-of-sight estimation neural network, which improves the stability and training efficiency of the line-of-sight estimation neural network. A few-sample learning method is applied to training of the line-of-sight estimation neural network, which improves generalization performance of the line-of-sight estimation neural network. A nonlinear division method for small intervals of angles of the line of sight is provided, which reduces an estimation error of the line-of-sight estimation neural network. Eye opening and closing detection is added to avoid the line-of-sight estimation error caused by an eye closing state. A method for solving a landing point of the line of sight is provided, which has high environmental adaptability and can be quickly used in actual deployment.

IPC Classes  ?

• G06T 7/73 - Determining position or orientation of objects or cameras using feature-based methods
• G06V 10/776 - ValidationPerformance evaluation
• G06V 10/82 - Arrangements for image or video recognition or understanding using pattern recognition or machine learning using neural networks
• G06V 40/16 - Human faces, e.g. facial parts, sketches or expressions
• G06V 40/18 - Eye characteristics, e.g. of the iris

Abstract

The present invention provides a method for eddy current thermography defect reconstruction based on electrical impedance tomography, first, obtaining a thermal reference image of temperature change with time by acquiring a thermogram sequence S of the specimen in the process of heating and fitting a curve for pixels of each location of the thermogram sequence S, then, creating a current matrix and a magnetic potential matrix, and calculating the satisfied conductivity distribution through iterations, so as a reconstructed image is obtained, then taking the low conductivity area of the reconstructed image as the defect profile, thus the defect profile is identified and quantified.

IPC Classes  ?

• G01N 27/90 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
• G01N 1/44 - Sample treatment involving radiation, e.g. heat
• G01N 25/72 - Investigating presence of flaws

Abstract

A multi-feature log anomaly detection method includes steps of: preliminarily processing a log data set to obtain a log entry word group corresponding to all semantics of a log sequence in the log data set, and using the log entry word group as a semantic feature of the log sequence; extracting a type feature, a time feature and a quantity feature of the log sequence, and encoding the semantic feature, the type feature, the time feature and the quantity feature into a log feature vector set of the log sequence; training a BiGRU neural network model with all log feature vector sets to obtain a trained BiGRU neural network mode; and inputting the log data set to be detected into the trained BiGRU neural network model for prediction, and determining whether the log sequence is a normal or abnormal log sequence according to a prediction result.

IPC Classes  ?

• G06N 3/08 - Learning methods
• G06F 40/30 - Semantic analysis

Abstract

A wireless single-phase AC-to-AC conversion circuit based on a 2.4G microwave includes a receiving antenna unit, a RF switch unit, a positive voltage rectification unit, a negative voltage rectification unit and an AC synthesis unit. An output port of the receiving antenna unit is connected to the common input port of the RF switch unit. A first microwave output end of the RF switch unit and a second microwave output end of the RF switch unit are correspondingly connected to a microwave input end of the positive voltage rectification unit and a microwave input end of the negative voltage rectification unit, respectively. A DC output end of the positive voltage rectification unit and a DC output end of the negative voltage rectification unit are correspondingly connected to a positive voltage input port of the AC synthesis unit and a negative voltage input port of the AC synthesis unit, respectively.

IPC Classes  ?

• H04B 1/16 - Circuits
• H04B 1/00 - Details of transmission systems, not covered by a single one of groups Details of transmission systems not characterised by the medium used for transmission
• H04B 1/04 - Circuits
• H04B 1/44 - Transmit/receive switching

Abstract

The present invention provides a system for data mapping and storing in digital three-dimensional oscilloscope, wherein the fixed coefficients, which are calculated according the parameters and settings of a digital oscilloscope, are stored into a fixed coefficient memory CO RAM, the fixed coefficients are outputted to N fractional operation units through N−1 D flip-flop delay units to multiply with the acquired data x(n) and then be accumulated, thus N fractional calculus results are obtained. In this way, N fractional calculus results can be obtained by performing L/N fractional calculus operations. N fractional calculus results are sent to a signal processing and display module, in which they are converted into a display data through a drawing thread, and the display data are sent to LCD for displaying, thus the fractional calculus operation and display of a input signal in a digital oscilloscope is realized.

IPC Classes  ?

• G01R 13/40 - Arrangements for displaying electric variables or waveforms using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect
• G01R 13/02 - Arrangements for displaying electric variables or waveforms for displaying measured electric variables in digital form

Abstract

The present disclosure provides a method for detection of soil heavy metal pollution using an unmanned aerial vehicle (UAV) and an X-ray fluorescence (XRF) technology. Based. Based on hardware equipment such as the UAV, XRF analyzer, and embedded equipment, the present disclosure develops an altitude hold module of the system and a ground-contact monitoring module, and assists the UAV to achieve safe and accurate fixed-point hovering, and develops a driving device for data acquisition to replace manual control and realize the automatic acquisition of XRF data. The data inversion method is realized by using embedded equipment, and after the data is acquired by the portable XRF analyzer near the ground, the algorithm research of inversion processing of contents of heavy metal elements in soil is realized, such that the portable XRF analyzer can automatically and accurately detect the contents of heavy metals in soil at a certain distance.

IPC Classes  ?

• G01N 23/223 - Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups , or by measuring secondary emission from the material by irradiating the sample with X-rays or gamma-rays and by measuring X-ray fluorescence
• B64U 101/00 - UAVs specially adapted for particular uses or applications
• G01C 21/20 - Instruments for performing navigational calculations
• G01N 33/24 - Earth materials
• G01S 19/45 - Determining position by combining measurements of signals from the satellite radio beacon positioning system with a supplementary measurement
• G05D 1/00 - Control of position, course, altitude or attitude of land, water, air or space vehicles, e.g. using automatic pilots

Abstract

gd caused by overlapping of traditional polysilicon gate and drift region, but also enable the power semiconductor device to have strong robustness against an hot carrier effect.

IPC Classes  ?

• H01L 29/78 - Field-effect transistors with field effect produced by an insulated gate
• H01L 29/06 - Semiconductor bodies characterised by the shapes, relative sizes, or dispositions of the semiconductor regions
• H01L 29/10 - Semiconductor bodies characterised by the shapes, relative sizes, or dispositions of the semiconductor regions with semiconductor regions connected to an electrode not carrying current to be rectified, amplified, or switched and such electrode being part of a semiconductor device which comprises three or more electrodes
• H01L 29/40 - Electrodes