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 application relates to a metal oxide semiconductor field effect transistor and a manufacturing method therefor. The metal oxide semiconductor field effect transistor comprises: a source region (142) having a first conductivity type; a drift region (130) having the first conductivity type; a first well region (120) having the first conductivity type, and located below the drift region (130) and connected to the drift region (130); a drain trench structure extending downward from the drift region (130) into the first well region (120), the drain trench structure comprising an insulating dielectric layer (145) located on a sidewall of a first trench, and a conductive material (146) located in the first trench and laterally surrounded by the insulating dielectric layer (145), and at least a portion of the drift region (130) being located between the source region (142) and the drain trench structure; and a gate (152) located on the drift region (130).

IPC Classes  ?

• H10D 30/65 - Lateral DMOS [LDMOS] FETs

Abstract

A high-speed matrix computation circuit, relating to electronic technology. The present invention comprises M+N-1 addition modules and a predetermined number of macro computation modules. Each macro computation module comprises M row lines and N column lines which are equivalently and orthogonally arranged. Multipliers are arranged at intersections of the row lines and the column lines to form a multiplier array composed of M x N multipliers. A first input terminal of each multiplier is connected to the row line in which the multiplier is located, and a second input terminal thereof is connected to the column line in which the multiplier is located. M and N are predetermined natural numbers. U[M-x][N-y] is used to represent a multiplier at each position, and x and y are both integers and satisfy the following conditions: 0≤x≤M-1, and 0≤y≤N-1. Among the macro computation modules, an output terminal of a multiplier satisfying x+y=S is connected to an input terminal of an addition module having a serial number S. On the basis of serial numbers, output terminals of the addition modules are connected to different bit weight input terminals of a bit weight addition circuit in a one-to-one correspondence. The present invention greatly reduces the amount of digital computation.

IPC Classes  ?

• G06F 17/16 - Matrix or vector computation

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 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

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

The present application relates to a semiconductor device, comprising: a source region (134); a drain region (132), wherein the drain region (132) is of the same conductivity type as the source region (134); a field oxide layer (150), which is located between the source region (134) and the drain region (132); a gate (138), which is located between the source region (134) and the drain region (132) and extends from an edge of the source region (134) onto the field oxide layer (150); and a resistive field plate (140), which is located on the field oxide layer (150), wherein a plurality of series-connected diodes obtained by means of N-type doping and/or P-type doping are formed on the resistive field plate (140), the conduction directions of some of the series-connected diodes are opposite to those of the others, and the resistive field plate (140) is electrically connected to both the drain region (132) and the gate (138).

IPC Classes  ?

• H10D 30/65 - Lateral DMOS [LDMOS] FETs

Abstract

The present invention provides a multi-target position and velocity joint estimation method based on terahertz near-field MIMO-OFDM, comprising: a terahertz near-field MIMO-OFDM model establishment step: establishing a near-field MIMO-OFDM signal model, and representing a received signal in the near-field MIMO-OFDM signal model as a third-order tensor; a tensor decomposition step: decomposing the received signal sensor, and on the basis of the uniqueness of the tensor decomposition, performing estimation by using a factor matrix obtained after the tensor decomposition to obtain estimated values of intermediate parameters; a parameter preliminary estimation step: using the estimated values of the intermediate parameters and a least squares (LS) algorithm for preliminary calculation so as to obtain iteration starting points, and establishing an optimization equation; and a precise positioning and velocity estimation step: performing Taylor expansion and second-order Taylor approximation on nonlinear terms of the optimization equation at the starting points, converting the optimization equation into a convex optimization equation, and using a cvx toolbox to iteratively solve the convex optimization equation to obtain estimated values of the position and the velocity of a target. The present invention improves the accuracy of target parameter estimation by jointly processing an inter-antenna phase difference and an inter-subcarrier phase difference by means of tensor decomposition.

IPC Classes  ?

• G01S 13/89 - Radar or analogous systems, specially adapted for specific applications for mapping or imaging
• H04B 7/0413 - MIMO systems

Abstract

The present application relates to a lateral device, comprising: a source region (134) having a first conductivity type; a drain region (132) having the first conductivity type; a drift region (110) having the first conductivity type and at least partially located between the source region (134) and the drain region (132); a buried region (112) of a second conductivity type located in the drift region (110) between the source region (134) and the drain region (132); a field oxide layer (150) located on the drift region (110); a top-doped region (120) located in the drift region (110) that is above the buried region (112) of the second conductivity type and below the field oxide layer (150), the top-doped region comprising at least one doped layer of the first conductivity type, and the doped layer of the first conductivity type having a doping concentration greater than that of the drift region (110); and field plates (140) located on the field oxide layer (150).

IPC Classes  ?

• H10D 30/65 - Lateral DMOS [LDMOS] FETs

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

An identity authentication method based on a building Internet of Things. The method comprises: a client sending a first request message for acquiring an anonymous identifier to a server; when the first request message passes verification against a real user information table previously uploaded to a private blockchain, the server generating an anonymous identifier on the basis of a user authentication identifier, uploading anonymous user information comprising the anonymous identifier to an anonymous user information table of a consortium blockchain, and returning the anonymous identifier to the client; the client sending a second request message for acquiring an anonymous credential to a first management node; and when it is verified on the basis of the anonymous user information table that a user corresponding to the anonymous identifier has permission to access a target building device, the first management node generating an anonymous credential corresponding to the anonymous identifier, and returning the anonymous credential to the client.

IPC Classes  ?

• H04L 9/40 - Network security protocols

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

A backscatter communication synchronization and control method based on an ambient cellular OFDM signal, which method relates to the technical field of wireless communications. The method comprises the following steps: S10, a sending end sending an ambient cellular OFDM signal, wherein the ambient cellular OFDM signal carries synchronization and control information; and S20, a backscatter tag acquiring the synchronization and control information from the ambient cellular OFDM signal, wherein step S20 comprises: the backscatter tag using an envelope detection circuit to convert the ambient cellular OFDM signal into a digital pulse signal; the backscatter tag establishing synchronization with the sending end by means of performing detection on a rising edge of the digital pulse signal; and the backscatter tag identifying control information of the sending end by means of measuring multiple pulse widths of the digital pulse signal. The method realizes reliable synchronization and control without relying on an additional excitation signal.

IPC Classes  ?

• H04L 27/26 - Systems using multi-frequency codes

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

The present application relates to a laterally diffused metal-oxide-semiconductor device and a preparation method therefor. The laterally diffused metal-oxide-semiconductor device comprises: a substrate structure 11; a first doped region 111, which is arranged in the substrate structure 11; a first well region 115 and a drain region 113, which are arranged in the first doped region 111 at intervals; a source region 112, which is arranged in the first well region 115; a variable-K dielectric layer 12, which is embedded in the first doped region 111 and is located between the first well region 115 and the drain region 113, wherein in a direction from a front surface of the substrate structure 11 to a back surface of the substrate structure 11, a dielectric constant of the variable-K dielectric layer 12 gradually increases; and a super-junction structure 13, which is arranged in the first doped region 111 on the side of the variable-K dielectric layer 12 that is close to the back surface of the substrate structure 11.

IPC Classes  ?

• H01L 29/06 - Semiconductor bodies characterised by the shapes, relative sizes, or dispositions of the semiconductor regions
• H01L 29/78 - Field-effect transistors with field effect produced by an insulated gate

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

Provided in the present invention is a video stabilization method that deeply integrates optical flow and IMU data. The method comprises: acquiring and preprocessing data, computing optical flow, computing historical data of an original pose and a stable pose, predicting a stable camera pose, implementing video stabilization, and training a deep learning model, wherein computing the optical flow involves mixing the optical flow and translation of a camera between adjacent frames as parameters of a translational motion of the camera and inputting the parameters into a deep learning network; computing the historical data of the original pose and the stable pose and predicting the stable camera pose involve using an LSTM network to train and predict stabilization quaternion; and implementing video stabilization involves dividing a video frame into rectangular grids, transforming vertices of the grids by means of the quaternion output by the deep learning network, obtaining each pixel value in the video frame by means of performing quadratic interpolation on four vertices of the grid where the pixel value is located, and processing each pixel value to obtain a stabilized video frame. The method of the present invention can adapt to complex motion scenarios and provide a highly stable video output.

IPC Classes  ?

• H04N 23/68 - Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations

Abstract

The present invention provides a back segmentation method based on improved Mask RCNN. The method comprises the following steps: collecting adolescent forward-bending bare back human body images to obtain a color image dataset; manually annotating human body bare back regions to obtain annotation files corresponding to original color images; constructing an improved Mask RCNN framework; training an improved Mask RCNN network to obtain a human body bare back segmentation model; and using the back segmentation model to obtain background-free human body bare back. The present invention effectively improves a feature pyramid in a Mask RCNN framework in light of an artificial intelligence technology and an image processing technology, and improves the accuracy of human body back region segmentation on the basis of instance segmentation characteristics of Mask RCNN.

IPC Classes  ?

• G06T 7/10 - SegmentationEdge detection

Abstract

An intelligent recommendation method based on user behavior features. The method comprises data collection, data organization, construction of an LR-based CTR model, construction of a CIN-based CTR model, and model selection and recommendation. On the basis of the design idea of a CTR recommendation model, the method takes into account user behavior features such as viewing, purchasing and favoriting, thus making reasonable recommendations on the basis of behaviors of user groups; in addition, massive user data is cleaned and reshaped to filter out valid data, thereby improving the training speed; furthermore, in order to enhance the prediction efficiency and prediction accuracy, a high-order explicit feature interaction terms algorithm is additionally introduced. The method effectively improves the process of conventional recommendation algorithms, thus enhancing the recommendation accuracy.

IPC Classes  ?

• G06F 16/9535 - Search customisation based on user profiles and personalisation

Abstract

An image classification neural network architecture searching method based on a social evolution algorithm. The method comprises: constructing an image classification neural network; executing in the image classification neural network an individual screening operation, a group organization tackling operation, an individual innovation operation, a failure tolerance mechanism and a development resource supply operation; searching for an optimal neural network architecture; and using the calculated image classification neural network to perform image classification.

IPC Classes  ?

• G06V 10/764 - Arrangements for image or video recognition or understanding using pattern recognition or machine learning using classification, e.g. of video objects

Abstract

The present invention relates to the field of knowledge graph reasoning, and disclosed is a neural architecture search-based knowledge graph link prediction method. By incorporating the characteristics of existing mature networks, certain constraints are imposed on changes in network search, for example, the sequential order of a convolution kernel layer and a pooling layer in a same cell is constrained, and a parallel/serial structure of a network layer in a same cell is also constrained by distance, such that a found architecture is more in line with existing empirical cognition, thereby reducing the probability of searching for poor networks, saving the computational overhead, and improving the search efficiency.

IPC Classes  ?

• G06F 16/906 - ClusteringClassification
• G06F 16/901 - IndexingData structures thereforStorage structures
• G06N 3/0985 - Hyperparameter optimisationMeta-learningLearning-to-learn
• G06N 3/0464 - Convolutional networks [CNN, ConvNet]
• G06N 3/042 - Knowledge-based neural networksLogical representations of neural networks
• G06N 3/0455 - Auto-encoder networksEncoder-decoder networks
• G06N 3/006 - Artificial life, i.e. computing arrangements simulating life based on simulated virtual individual or collective life forms, e.g. social simulations or particle swarm optimisation [PSO]
• G06N 5/02 - Knowledge representationSymbolic representation

Abstract

The present invention relates to the technical field of wireless communications. Disclosed is an adaptive non-orthogonal uplink multiple access method based on energy consumption. In the present invention, a plurality of users are paired on the basis of their distances from a base station; for a user close to the base station and having a small configured transmitting power, a DFT-s-OFDM waveform is used, and for a user far away from the base station and having a large configured transmitting power, the waveform of a signal to be transmitted is adaptively selected on the basis of the device energy level; that is, the DFT-s-OFDM waveform can be selected when the energy consumption level is high, and a low-energy-consumption waveform CE-OFDM is used when the energy consumption level is low. In the present invention, improved serial interference cancellation detection suitable for a new uplink access scheme is further configured at a receiving end; by means of the detection mode, when the waveform of a remote user is unknown to the base station, global detection can be performed by means of pattern recognition to complete data detection of the remote user. By means of blind recognition by a base station, additional signaling or resource overhead related to waveform indication can be effectively avoided.

IPC Classes  ?

• H04L 27/26 - Systems using multi-frequency codes

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

Disclosed in the present invention are an age-of-sensing analysis and optimization method for a wireless power supply sensor network. The method comprises the following steps: S1, determining a network model; S2, determining a MAC layer model; S3, determining a channel model; S4, on the basis of a multi-segment formula, fitting a nonlinear energy-receiving model, and calculating the decoding success probability of a single sensor; S5, calculating the possibility of information being successfully received in a fusion center under a sensing information requirement threshold; S6, using a hypothesis testing theory to model a fusion-sensing reliability model, so as to obtain the probability of credible fusion; S7, by means of a joint sensing-transmission success possibility, acquiring a closed-form expression of age of sensing, and formulating an information timeliness optimization problem; and S8, respectively optimizing a sensor power supply duration, a fusion information demand threshold, and sensor deployment, so as to give a minimum age of sensing. By means of the present invention, age of sensing is optimized on the basis of the analysis thereof, thereby improving the timeliness of sensing information.

IPC Classes  ?

• H04W 4/38 - Services specially adapted for particular environments, situations or purposes for collecting sensor information

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

The present invention relates to the field of big data and business intelligence, and in particular to an online retail data prediction system and method. The method comprises the following steps: acquiring a first dataset and a second dataset, wherein both the first dataset and the second dataset comprise several years of data, and each year of data comprises two missing values; and in respect of the problem of an online retail sales dataset including missing values with unique features, performing relatively accurate imputation on the basis of data trends, and on the basis of features of an imputed complete dataset, using prediction model groups matching the features to perform prediction, thereby improving the accuracy of online retail sales prediction.

IPC Classes  ?

• G06Q 30/0202 - Market predictions or forecasting for commercial activities

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

Disclosed in the present application is a fault determination method. The fault determination method for intelligent building fault event extraction based on contrastive learning comprises: inputting text to be recognized into a trigger word extraction module of a target fault recognition model, and acquiring at least one golden trigger word, which is outputted by the trigger word extraction module; and inputting the at least one golden trigger word into a trigger word classification module of the target fault recognition model, and acquiring target fault information, which is outputted by the trigger word classification module.

IPC Classes  ?

• G06F 16/35 - ClusteringClassification

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

Disclosed in the present application is a rapid approximate analysis method for a mutual-coupling-containing pattern of a large-scale ultra-wideband heterogeneous array. The method comprises the following steps: according to the types of elements used, dividing a heterogeneous array into a plurality of sub-arrays, wherein the types of elements in each sub-array are identical; according to the positions of the elements, 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. The present application can effectively avoid the enormous operational resource overheads of full-wave simulation of a large-scale heterogeneous array, thus greatly reduce the complexity of computing of a mutual-coupling-containing pattern, and can also ensure the accuracy of the obtained mutual-coupling-containing pattern.

IPC Classes  ?

• G06F 30/20 - Design optimisation, verification or simulation

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

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

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

Provided in the present application are a circuit, a control method therefor, a wireless transceiver system, a chip and an electronic device, which are used for enabling two different working modes to share a same first mixer circuit and a same second mixer circuit. The circuit comprises a first mixer circuit, a second mixer circuit, a first port, a second port, a third port, a fourth port, a first switch and a second switch; the first mixer circuit comprises a first input end and a first output end; the second mixer circuit comprises a second input end and a second output end; the first input end selects, by means of the first switch, to be electrically connected to the first port or the second port; the first output end selects, by means of the first switch, to be electrically connected to the second port or the first port; the second input end selects, by means of the second switch, to be electrically connected to the third port or the fourth port; and the second output end selects, by means of the second switch, to be electrically connected to the fourth port or the third port.

IPC Classes  ?

• H04B 1/401 - Circuits for selecting or indicating operating mode

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

A heating method, a microwave cooking device (10), and a computer-readable storage medium. The heating method comprises: transmitting a detection signal, the detection signal being used for acting on a food material and causing the food material to generate a reflection signal; according to characteristic parameters, generating heating mode information, at least some of the characteristic parameters being determined by means of the detection signal and the reflection signal; and according to the heating mode information, determining a heating mode for the food material, the heating mode corresponding to the type of the food material.

IPC Classes  ?

• H05B 6/64 - Heating using microwaves

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

Disclosed in the present invention is a satellite orbit error prediction method based on digital twin and container technologies, comprising the following steps: S1, constructing a digital twin-based satellite orbit error prediction system; and S2, constructing a container module for precise satellite orbit prediction to perform satellite orbit error prediction: constructing one or more container modules on a digital twin system constructed by a control center, completing initial orbit prediction value collection on the constructed container module, and performing satellite orbit error prediction on the basis of a temporal convolutional network. According to the present invention, the digital twin system and the container module are introduced into satellite orbit prediction by the control center, so that offline training of a machine learning model becomes possible, the problems of burden of calculation under the control center and difficulty in model updating are solved, and orbit prediction errors instead of all available satellite orbit data are used as learning variables, so that the dimensions of input variables are reduced, overfitting during model training is avoided to a certain extent, and prediction precision is improved.

IPC Classes  ?

• G06F 30/27 - Design optimisation, verification or simulation using machine learning, e.g. artificial intelligence, neural networks, support vector machines [SVM] or training a model

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

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

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

Provided in the present invention is a binocular polarization three-dimensional reconstruction method. The method comprises: acquiring a polarized image, and left and right images from a binocular camera; calculating a zenith angle and an azimuth angle; calculating a normal gradient map of an object surface; calculating a binocular vision point cloud of an object; performing normal gradient correction; performing gradient integration surface reconstruction; and calculating true three-dimensional coordinates. By means of the method, the problem of the ambiguity of an azimuth angle calculated in polarization imaging is corrected by using prior information of an object surface that is acquired using a binocular vision method, so as to obtain an accurate normal gradient map; and a point cloud acquired using the binocular vision method is used as a "bridge", relative coordinates obtained by means of polarization reconstruction are converted into absolute coordinates, and a three-dimensional model having true information is obtained by means of reconstruction.

IPC Classes  ?

• H04N 7/18 - Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast

Abstract

stereooccstereooccdatasmoothsmooth(f) item of the energy function by means of occlusion detection.

IPC Classes  ?

• G06T 7/00 - Image analysis

Abstract

Provided in the present invention is a three-dimensional reconstruction method based on structured light and binocular vision. The method comprises: generating a coding pattern; performing image collection and preprocessing; calculating an absolute phase; calculating depth information by using a binocular stereoscopic vision technique; correcting the absolute phase; and calculating three-dimensional coordinate data. By means of the method, an ordered periods phase shift algorithm is improved on the basis of a Gray code technique, the number of periods is increased, and the precision of three-dimensional reconstruction is improved. Moreover, by means of the present invention, the problem of stripe mutation of an absolute phase in an ordered periods phase shift algorithm is effectively ameliorated on the basis of a binocular stereoscopic vision technique, thereby improving the accuracy of three-dimensional reconstruction.

IPC Classes  ?

• G06T 7/00 - Image analysis

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

The present invention belongs to the technical field of image processing, and specifically relates to a zero-delay panoramic video bitrate control method considering time-domain distortion propagation. The method of the present invention mainly involves target bit allocation optimization and global rate-distortion optimization coding, and comprises coding tree unit (CTU)-level bitrate control and time-domain global rate-distortion optimization. The CTU-level bitrate control mainly comprises target bit allocation optimization and bitrate control parameter updating. The time-domain global rate-distortion optimization mainly comprises: using reconstruction error and motion compensation prediction error information of a coded frame to estimate the time-domain dependency of each CTU in the current coding frame and accordingly adjusting rate-distortion optimization parameters of the CTUs; and further, according to the feature that pixel redundancies are increased due to oversampling at two poles during the process of projecting a panoramic spherical figure to a 2D plane (ERP projection), adjusting coding parameters on the basis of a projection area change ratio. The present invention can effectively reduce the coding time, and improves the video coding quality at a given bandwidth.

IPC Classes  ?

• H04N 19/146 - Data rate or code amount at the encoder output

Abstract

The present invention belongs to the technical field of image processing, and specifically relates to a low-complexity panoramic video encoding method considering time-domain distortion propagation. The present invention provides a panoramic video encoding method considering time-domain distortion propagation. By means of analyzing an inter-frame reference relationship under a random access encoding structure and establishing a corresponding distortion propagation chain, the present invention uses a distortion impact factor of the current encoding unit for adjusting encoding parameters, so as to achieve the objective of optimization encoding. In view of the problem of oversampling caused by the geometric deformation of different degrees of a spherical image of a panoramic video in different latitude areas during the projection process, the present invention adjusts the encoding parameters according to area change ratios of different latitudes, thus greatly improving the encoding performance.

IPC Classes  ?

• H04N 19/147 - Data rate or code amount at the encoder output according to rate distortion criteria

Abstract

The present application relates to the technical field of wireless power transmission. Provided are a wireless power transmission apparatus, a signal processing method, a device and a system, which are used for improving the accuracy and sensitivity of acquiring amplitude and phase information of pilot signals. The apparatus comprises a first channel and a plurality of second channels. The first channel is used for receiving a first pilot signal and outputting a reference signal according to the first pilot signal; and each of the plurality of second channels is used for receiving a second pilot signal and the reference signal and determining the phase and amplitude of the second pilot signal according to the reference signal, namely, the plurality of second channels all perform amplitude and phase identification on second pilot signals of the second channels using the reference signal outputted by the first channel according to the first pilot signal, wherein the phases and amplitudes of the second pilot signals are used for determining a power transmission signal corresponding to the second channels, and the first pilot signal and the second pilot signals are obtained by means of the first channel and the second channels receiving the same pilot signal.

IPC Classes  ?

• H01Q 3/26 - 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

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

abcd44) material, wherein the value range of a is 0.3-0.55, the value range of b is 0.45-0.55, the value range of c is 0-0.2, and the value range of d is 1.8-2; and in the ferrite particles, the number of particles having a particle size of 2-11 μm accounts for 50-70%. The filler has the advantages of a low relative density, a wide absorption frequency band and good high-temperature and low-temperature properties, such that the overall mass of a packaged device can be reduced, and the anti-electromagnetic interference frequency band and suitable temperature range of the packaged device are improved.

IPC Classes  ?

• C04B 35/30 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on ferrites with nickel oxide as the principal oxide with zinc oxide
• C04B 35/622 - Forming processesProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products
• H01F 1/36 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites in the form of particles
• C08K 3/22 - OxidesHydroxides of metals
• H01L 23/29 - Encapsulation, e.g. encapsulating layers, coatings characterised by the material

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

Provided are a method and device for purifying blood on the basis of a blood-repellent breathable film (3), an apparatus, and a device. By means of the air permeability of the blood-repellent breathable film (3), the difference of temperatures inside and outside the blood-repellent breathable film (3) is controlled. When blood flows through the blood-repellent breathable film (3), water in the blood carries metabolic molecules to penetrate through holes in the blood-repellent breathable film (3) in the form of vapor to reach the outside of the blood-repellent breathable film (3), and condenses outside the blood-repellent breathable film (3) to be guided out, such that excessive water and metabolic substances in the blood can be removed under the condition that a dialysate does not need to be used.

IPC Classes  ?

• A61M 1/34 - Filtering material out of the blood by passing it through a membrane, i.e. hemofiltration, diafiltration

Abstract

The present invention belongs to the technical field of wireless communications. Disclosed is a multiple access method for a constant envelope orthogonal frequency division multiplexing system. The method of the present invention comprises: a transmitting end sequentially performing digital modulation, symmetric mapping, frequency domain-time domain transformation, phase modulation, time domain-frequency domain transformation, frequency domain migration, frequency domain-time domain transformation and cyclic prefix adding on information bits of users to obtain a baseband transmission signal and sending same to a receiving end by means of a channel; and the receiving end sequentially performing time domain-frequency domain transformation, user separation, equalization migration, frequency domain-time domain transformation, phase demodulation, time domain-frequency domain transformation, de-mapping and determination on the received signal to obtain detection results of the corresponding users. In the present invention, different phase rotations are performed for different users, such that data aliasing between users is reduced, thereby reducing interference between users and improving system performance.

IPC Classes  ?

• H04L 27/20 - Modulator circuitsTransmitter circuits
• H04L 27/22 - Demodulator circuitsReceiver circuits

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 shorted-anode lateral insulated gate bipolar transistor and a manufacturing method therefor. The transistor comprises: a drift region (103) having a first conductivity type; a collector region (109) provided in the drift region (103) and having a second conductivity type; an anode region (110) having the first conductivity type; and an isolation structure (106), comprising a first structure provided between the collector region (109) and the anode region (110), and a second structure (1062) forming an included angle with the first structure (1061) and extending from the first structure (1061) to below the anode region. The first conductivity type is one of an N type and a P type, and the second conductivity type is the other one of the N type and the P type.

IPC Classes  ?

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

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 self-detection circuit based on a power detector, comprising: a power detector, a coupler, a phased array transmitting channel 1, and a phased array transmitting channel 2. The power detector has two working modes, i.e., a phase detection mode and an amplitude detection mode. The problems of high complexity and large chip area of a self-detection circuit are solved.

IPC Classes  ?

• G01R 21/06 - Arrangements for measuring electric power or power factor by measuring current and voltage
• G01R 21/133 - Arrangements for measuring electric power or power factor by using digital technique
• G01R 25/00 - Arrangements for measuring phase angle between a voltage and a current or between voltages or currents

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

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

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

The present invention belongs to the technical field of information security. Disclosed is a privacy-preserving neural network prediction system. The present invention comprises a client, a server and a third party. In an offline prediction stage of a neural network model, the client, the server and the third party complete sharing of model parameters by means of negotiation; and in an online prediction stage, the client sends a shared value of input data to the server, the client and the server jointly execute privacy-preserving neural network prediction using a secure computing protocol, the server shares an obtained prediction result to the client, and the client performs reconstruction to obtain a prediction result. In terms of communication, the present invention only requires one round of communication interaction, and reduces the communication overhead data volume of an existing solution, such that the communication efficiency of the present invention is significantly increased; and all computations in the present invention are based on rings instead of fields. In the present invention, a protocol for the offline stage is recustomized, such that not only is the efficiency of the offline stage increased, but only a lightweight secret sharing operation is required.

IPC Classes  ?

• H04L 9/08 - Key distribution
• G06N 3/08 - Learning methods
• G06N 3/04 - Architecture, e.g. interconnection topology
• G06N 5/04 - Inference or reasoning models
• G06F 7/58 - Random or pseudo-random number generators

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

The present invention belongs to the technical field of 5G millimeter wave communications. Disclosed are a 5G dual-band upper frequency mixer with amplification and frequency mixing function switching, and a terminal. A first double-balanced active frequency mixer and a second double-balanced active frequency mixer are connected in series, two ends of the first double-balanced active frequency mixer are respectively connected to a first transformer and a second transformer, and two ends of the second double-balanced active frequency mixer are respectively connected to the second transformer and a third transformer; the first double-balanced active frequency mixer is provided with a first MOS transistor and a fourth transformer that is connected to the first MOS transistor; and the second double-balanced active frequency mixer is provided with a second MOS transistor and a fifth transformer that is connected to the second MOS transistor. In the present invention, two double-balanced active frequency mixers are connected in series, the later-stage frequency mixer can be switched to an amplifier function by means of controlling a bias voltage and an alternating-current signal switch, such that the whole frequency mixer can perform frequency mixing once or frequency mixing twice, so as to respectively correspond to radio-frequency signals of two bands, and thus dual-band upper frequency mixing can be realized.

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