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223 results about "Residual neural network" patented technology

A residual neural network (ResNet) is an artificial neural network (ANN) of a kind that builds on constructs known from pyramidal cells in the cerebral cortex. Residual neural networks do this by utilizing skip connections, or short-cuts to jump over some layers. Typical ResNet models are implemented with double- or triple- layer skips that contain nonlinearities (ReLU) and batch normalization in between. An additional weight matrix may be used to learn the skip weights; these models are known as HighwayNets. Models with several parallel skips are referred to as DenseNets. In the context of residual neural networks, a non-residual network may be described as a plain network.

Radar lifting control method and system based on meteorological monitoring

The invention discloses a radar lifting control method and system based on meteorological monitoring, and relates to the technical field of radar lifting control, and the method comprises the steps: completing the switching of a power supply and communication after a radar is powered on, initializing a controller, collecting the data of a meteorological station, and generating a future fusion wind speed in real time through a Kalman filtering physical model and a residual neural network; future fused wind speed is converted into wind pressure for evaluation, the risk degree is judged according to the evaluation result, early warning is given out, and the controller is preheated to enter a lifting preparation state. The input stability is improved through meteorological data sliding window smoothing and feature extraction, wind speed dynamic prediction and uncertainty quantification are achieved through XGBoost prediction and residual variance estimation, the time sequence consistency and robustness are enhanced through remote API interpolation correction and adaptive extended Kalman filtering, residual correction is conducted through a neural network, the prediction precision is improved, and the prediction accuracy is improved. And a reliable decision basis is provided for radar lifting control.
Owner:ZHONGAN GUOTAI (BEIJING) TECH DEV CENT

Image recognition method for secondary circuit terminal based on contrastive learning and improved CRNN

The present disclosure belongs to the technical field of health status assessment of secondary circuits in power systems, and specifically relates to an image recognition method for a secondary circuit terminal based on contrastive learning and an improved CRNN. The method includes: step 1: pre-training sample data of a secondary circuit terminal block of a power system through the contrastive learning; step 2: improving a feature extraction layer of a CRNN by using a residual neural network; and step 3: introducing an ECA-Net on the basis of the step 2 to construct a recognition model for the secondary circuit terminal based on the contrastive learning and the improved CRNN. In the method of the present disclosure, an image of the secondary circuit terminal block can be accurately recognized, and the accuracy of image recognition, detection accuracy and detection efficiency can be greatly improved.
Owner:SANMEN NUCLEAR POWER CO LTD

Online calibration method for running state of electricity meter

The invention provides an electricity meter running state online calibration method, which relates to the technical field of electric power metering, and comprises the following steps: acquiring voltage signals and current signals of an electricity meter to be calibrated under different load conditions, and extracting instantaneous phase characteristics and instantaneous amplitude characteristics of the voltage signals and the current signals; a voltage feature sequence and a current feature sequence are obtained, and a deep residual neural network model is constructed based on a load feature vector to output a dynamic compensation parameter matrix, so that online calibration is performed on a measured value of the electric meter. Therefore, the accuracy and the real-time performance of ammeter calibration under the complex load condition can be remarkably improved, the influence of environment change and nonlinear load characteristics on the calibration result is effectively avoided, and the long-term metering reliability of the ammeter and the operation efficiency of a smart power grid can be improved.
Owner:LINYI RONGXIAN WATER METER CO LTD

Sonar image classification method based on high and low frequency combined features

The invention discloses a sonar image classification method based on high and low frequency combined features, and the method comprises the steps: obtaining a to-be-recognized sonar image, inputting the to-be-recognized sonar image into a trained image classification network, and outputting a target classification result in the sonar image; the image classification network comprises a wavelet transformation module, a residual neural network, a bidirectional cross attention mechanism module, an adaptive fusion module and an output module, wherein the wavelet transformation module is used for transforming an input sonar image into a high-frequency sonar image and a low-frequency sonar image; the residual neural network has a high-frequency branch and a low-frequency branch which are parallel and is used for extracting high-frequency features and low-frequency features; the bidirectional cross attention mechanism module is used for performing interaction and complementation on the high-frequency features and the low-frequency features; the self-adaptive fusion module is used for performing deep fusion on high-frequency feature maps and low-frequency feature maps output by the high-frequency branch and the low-frequency branch; and the output module is used for classifying the fused image features and outputting a classification result of the target.
Owner:SHAANXI NPU SCI PARK CO LTD

Visual detection test method for damage crack of solidified soil test piece

The invention discloses a visual detection test method for damage cracks of a solidified soil test piece, and particularly relates to the technical field of geotechnical engineering material detection. The method comprises the following steps: doping fluorescence labeling particles in a solidified soil test piece, and applying periodic load to induce crack formation after curing and forming; synchronously exciting fluorescent particles through an ultraviolet excitation light source, and collecting a short-wave fluorescence response image sequence; inputting the image sequence into a deep residual neural network model, identifying a nonlinear enhancement region of a fluorescence signal, and deducing a crack initiation position and a propagation path; constructing a three-dimensional dynamic model of crack evolution in combination with an image space reconstruction algorithm and time sequence comparison, extracting indexes such as a crack propagation rate, a bending angle and crack density, performing comparative analysis on the indexes and initial parameters of a material, evaluating a microstructure damage development mechanism, and outputting a visual damage evolution result; the method provided by the invention can realize high-precision, non-destructive and dynamic detection of the fine cracks in the solidified soil, and has the advantages of high identification sensitivity, strong modeling precision and good engineering adaptability.
Owner:GUANGDONG UNIV OF TECH

Monocular vision and sparse IMU-based rehabilitation action whole body attitude estimation method and system

The invention provides a monocular vision and sparse IMU rehabilitation action whole body posture estimation method and system, and the method comprises the steps: synchronously collecting video data and inertial data of human body rehabilitation actions through a monocular RGB camera and a plurality of IMUs, and cutting and zooming an image to a preset resolution; extracting a key point thermodynamic diagram from continuous N frames of images by using a sliding window and a residual neural network, and calculating 2D key point pixel coordinates of each frame; splicing the N frames of 2D key point pixel coordinates, the rotation matrix of the IMU and the acceleration signal into an input sequence; cross-modal time sequence modeling is carried out on an input sequence through time Transform, and after high-dimensional features are extracted, weighted average is carried out through a convolutional layer, and 3D relative key point coordinates of the last frame are output through a regression head. According to the method, by fusing monocular vision and sparse IMU cross-modal data, the problem of visual information loss caused by limb self-shielding is effectively solved, and the defect that a traditional pure vision method is insufficient in precision in rehabilitation actions is overcome.
Owner:SHANGHAI JIAOTONG UNIV

Grinding state online monitoring method based on multilayer data fusion and mathematical combined driving model

The invention discloses a grinding state on-line monitoring method based on multilayer data fusion and a mathematical combined driving model, and the method comprises the steps: carrying out the signal collection through a multi-source sensor, carrying out the fusion according to a corresponding weight, and carrying out the noise reduction through stacking self-coding. When signals are extracted, frequency domain multi-dimensional features are fed into the residual neural network and the bidirectional double-layer LSTM fusion model after being subjected to Pearson correlation screening, and single-working-condition grinding state recognition is achieved. 10 types of discrete grinding states are defined, and a physical driving type empirical formula for working condition and monitoring signals and working condition and state characterization is established based on working condition parameters such as grinding depth and main shaft rotating speed. And generating a training data set by using an empirical formula, and training a cross-working-condition monitoring model through a transfer learning mechanism to realize cross-working-condition identification. According to the method, online accurate recognition of the grinding state is achieved, the limitation of traditional single-working-condition monitoring is broken through, and the problem of repeated data collection training is solved through the physical law of an empirical formula.
Owner:HARBIN INST OF TECH

Porous asphalt concrete gap blockage identification method based on pavement noise signals

The invention discloses a porous asphalt concrete gap blockage identification method based on pavement noise signals, and belongs to the technical field of asphalt concrete blockage identification, and the method comprises the following steps: S1, collecting tire-pavement contact original noise signal audio data, and carrying out the preprocessing; s2, carrying out pavement gap blockage degree sensitive correlation analysis, and extracting multi-dimensional acoustic features; s3, dividing a single-layer drainage asphalt pavement data set and a double-layer drainage asphalt pavement data set, and giving a blockage level label to obtain a marked data set; s4, constructing a deep residual neural network model, and performing training and verification to obtain a gap blockage degree identification model; and S5, identifying porous asphalt concrete gap blockage. According to the method, the accurate classification of the gap blockage degree is realized through the blockage recognition model based on the acoustic characteristics, the optimal cleaning and maintenance opportunity can be determined, a scientific decision basis is provided for the maintenance of the porous asphalt concrete pavement, and the pertinence and economy of the maintenance are improved.
Owner:SOUTH CHINA UNIV OF TECH +1

Underground pipe network construction segmented supervision system based on deep learning

The invention discloses an underground pipe network construction segment supervision system based on deep learning. The method comprises the following steps: establishing a segment coordinate framework by using construction segment boundary information and mileage pile number information; constructing a super voxel graph; obtaining super voxel maps with consistent time sequences; generating a cross-modal feature vector; outputting a first abnormity identification result; updating the first dense residual neural network model to obtain a second dense residual neural network model; obtaining a third dense residual neural network model, and outputting a second uncertainty score and a third anomaly recognition result; and generating a structured anomaly report according to the third anomaly recognition result, the second uncertainty score and laws and regulations in the building information model and the geographic information model. According to the method, abnormal features of different spatial scales can be captured at the same time, meanwhile, multi-type abnormal structures are subjected to accurate grading identification, the generalization ability and the robustness adaptability to multi-scale anomalies are higher, and the probability of false alarm and missing alarm is remarkably reduced.
Owner:CHINA RAILWAY CONSTRUCTION ENGINEERING GROUP

Three-dimensional vision measurement system error compensation method based on spatial adaptive weighted RBF (Radial Basis Function) residual neural network

The invention discloses a three-dimensional vision measurement system error compensation method based on a spatial adaptive weighted RBF residual neural network, and particularly provides a spatial adaptive residual learning framework SAW-RFramework, in the first stage, global rigid body errors are eliminated based on a Kabsch algorithm, and point cloud rigid alignment is realized; in the second stage, a thin-plate spline kernel RBF interpolator is used for modeling a spatial smoothing error field, and position-related systematic deviation is captured; and in the third stage, a partition weighted residual neural network is adopted, and an improved residual compensation network is proposed for residual high-fluctuation nonlinear residual after RBF modeling: a regional importance coefficient is calculated based on a mean value and a variance of the residual in a self-adaptive three-dimensional grid, so that network training focuses on a high-error and high-fluctuation region. According to the method, the problems of insufficient global spatial modeling capability, low boundary region compensation precision, poor generalization capability and the like of an existing method can be solved; high-precision error compensation of the three-dimensional vision measurement system is realized, the measurement result reaches submillimeter precision, and the application reliability in robot control, man-machine interaction and precision manufacturing is improved.
Owner:SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI

Multi-sensor track management method based on spatial-temporal characteristic comparison

The invention discloses a multi-sensor track management method based on spatio-temporal feature comparison, belongs to the field of multi-sensor information fusion and target tracking, and provides a track association algorithm based on spatio-temporal feature comparison by combining a bidirectional LSTM network and a residual neural network for the track association problem of multiple sensors and multiple targets. Through time feature extraction, space feature extraction, track feature comparison and a classifier module, conversion from a track association problem to a dichotomy problem is realized. And finally, through an analog simulation experiment, the convergence and generalization of the proposed network are verified. In a Monte Carlo experiment, the algorithm provided by the invention can reach the correlation accuracy of 95% or more, the trained network can quickly realize track correlation, and the track correlation effect is not sensitive to the influence of scene change.
Owner:XI AN JIAOTONG UNIV

Charging pile adaptive pulse width modulation method, medium and system

The invention provides a self-adaptive pulse width modulation method, medium and system for a charging pile, and belongs to the technical field of charging piles. The self-adaptive pulse width modulation method comprises the following steps: acquiring voltage and current values of a battery, calculating a charge state parameter and a tilt change rate of the battery, and calculating a load coefficient and a third-order precision index by combining a load sensing algorithm; and analyzing the current waveform by using Fourier transform to obtain a harmonic distortion index, and calculating a delay compensation function value. The core technology is to call a deep residual neural network model of a double-path parallel architecture, input multi-dimensional characteristic parameters, output optimal pulse width modulation parameters and generate pulse width modulation signals to adjust charging characteristics. Meanwhile, the temperature and the internal resistance value of the battery are monitored in real time, parameter updating is triggered when the preset threshold value is exceeded, a complete closed-loop control cycle is formed, and the technical problem that the pulse width modulation parameter accurately adapts to the change of the charging state of the battery under the complex dynamic load condition is effectively solved.
Owner:BEIJING XIRONG TONGSHUN INVESTMENT MANAGEMENT CO LTD

Ship navigation behavior prediction method and system based on interpretable artificial intelligence

The invention relates to the technical field of ship navigation behavior prediction, and discloses a ship navigation behavior prediction method and system based on interpretable artificial intelligence. Comprising the following steps: acquiring ship AIS historical data and historical marine environment data in a target sea area; based on a time scale and a space scale, fusing the ship AIS historical data and the historical marine environment data, and constructing a spatio-temporal data set; performing feature decoupling on a static variable and a time-varying variable of the spatio-temporal data set, and determining historical input data, known future input data and static input data; an interpretable space-time fusion neural network model is constructed based on a dynamic gating residual neural network, a space-time characteristic variable selection network, a Fourier analysis gating neural unit and an interpretable multi-head attention mechanism so as to accurately predict ship navigation behaviors such as a ship trajectory, an over-the-ground navigational speed and an over-the-ground course. And a navigation behavior influence factor weight visualization result is output, and the method has interpretability.
Owner:TIANJIN UNIV

Electric energy quality disturbance identification method and identification device, equipment and storage medium

The invention relates to the technical field of power quality identification, and discloses a power quality disturbance identification method and device, equipment and a storage medium, and the method comprises the steps: obtaining a power quality disturbance signal; performing feature extraction on the power quality disturbance signal by using a preset one-dimensional convolutional neural network and a one-dimensional residual neural network to obtain a target time feature vector of the power quality disturbance signal; performing feature fusion processing on the target time feature vector by using a preset multi-head attention mechanism to obtain a fused signal feature; and classifying the fused signal features by using a preset classifier to obtain a final classification result used for indicating the disturbance type of the power quality disturbance signal. According to the method, various feature information can be integrated, the influence of noise on a classification result is effectively reduced, the classification performance and generalization ability of a classifier are improved, better performance is achieved in the aspects of classification accuracy and noise immunity, disturbance recognition accuracy is improved, and effective support is provided for electric energy fault diagnosis in an electric power system.
Owner:YUNNAN POWER GRID CO LTD +1

Six-dimensional force sensor calibration method based on intelligent algorithm and ensemble learning

The invention discloses a six-dimensional force sensor calibration method based on an intelligent algorithm and ensemble learning, which improves calibration precision and system adaptability by combining data anomaly detection, the intelligent algorithm and the ensemble learning. The calibration method comprises the following steps: S1, building a six-dimensional force sensor calibration system; s2, loading and unloading experiments of force and torque are carried out on the six-dimensional force sensor on the standard calibration table, and multi-channel analog signal data output by the six-dimensional force sensor are obtained; s3, repeating the operation in the step S2 for a plurality of times; s4, data anomaly detection; s5, performing preliminary calibration by adopting a multiple linear regression model to obtain a preliminary decoupling matrix of the six-dimensional force sensor; s6, calculating error data after multiple linear regression calibration, and taking the error data as input characteristics of subsequent error compensation; s7, performing error compensation based on the residual neural network; and S8, determining calibration precision and outputting a final model.
Owner:HANGZHOU INST FOR ADVANCED STUDY UCAS

Multi-fault diagnosis method for lithium battery sample scarcity and data imbalance

The invention discloses a multi-fault diagnosis method for lithium battery sample scarcity and data imbalance, and the method comprises the steps: firstly constructing a feature extraction model based on a residual neural network, introducing an improved multi-factor imbalance index (MFI), carrying out the analysis of real-time monitoring batch feature distribution through employing a minimum spanning tree, and carrying out the real-time monitoring of the real-time monitoring batch feature distribution; therefore, the loss function and the sample weight are dynamically adjusted, and the learning stability of majority classes and the recognition precision of minority classes are both considered. On the basis, a prototype vector of a normal working condition is obtained through sample feature mean value calculation, and a prototype network (ProtoNet) is constructed to serve as an anomaly detector; after features of a test sample are extracted through the ResNet-MFII module, the Euclidean distance between the test sample and a normal prototype is calculated, if the Euclidean distance exceeds a set threshold value, it is judged that the test sample is abnormal, and detection of unknown or rare faults is achieved. The system finally outputs fault types and abnormal alarms, and high-precision recognition of multiple types of faults such as short circuit and aging of the lithium ion battery is achieved.
Owner:CHONGQING UNIV OF POSTS & TELECOMM +1

Cable defect positioning and intelligent identification system and method based on broadband impedance spectroscopy

The invention belongs to the technical field of buildings, and particularly relates to a cable defect positioning and intelligent identification system and method based on a broadband impedance spectrum. The system comprises a vector network analyzer which can inject a sweep frequency excitation signal into a target cable to be detected, a high-precision receiver which is used for collecting signal reflection / transmission response so as to obtain full-band complex impedance spectrum data, and computer equipment which receives test data. The positioning method based on Nuttall-Kai ser mixed window and cepstrum coupling does not need to depend on an intact cable parameter database, is high in anti-interference capability, can accurately identify defect positions, and is high in positioning precision; the one-dimensional impedance spectrum is converted into the two-dimensional image through the GAF, the automatic identification of the defect type is realized by combining the residual neural network (ResNet), the manual intervention is reduced, and the automation degree is high; the deep feature learning capability of ResNet is utilized, and a CBAM attention module is combined, so that the capture of a fine defect mode is enhanced, and the recognition accuracy is improved.
Owner:INNOVATION RES INST OF ZHEJIANG UNIV OF TECH SHENGZHOU

Passive radiation noise multipath channel estimation method based on complex residual neural network

The invention provides a passive radiation noise multipath channel estimation method based on a complex residual neural network. According to the method, complex number time-frequency characteristics of ship radiation noise are fully utilized, in a non-cooperative scene without prior information, time delay and amplitude parameters of a multipath channel are accurately estimated through a deep neural network, and the problems that a traditional method is unstable in performance and low in estimation precision under the condition of a low signal-to-noise ratio are solved. According to a simulation experiment, the estimation precision, robustness and path resolution capability of the algorithm are systematically analyzed from multiple angles of different signal-to-noise ratios, path strength and the like, the result shows that the method has stable and reliable performance under the ship radiation noise background, and the effectiveness and popularization potential of the method are verified.
Owner:HARBIN ENG UNIV

Carbon monoxide plume identification and quantification method based on domestic hyperspectral satellite

The invention provides a carbon monoxide plume identification and quantification method based on a domestic hyperspectral satellite, and the method comprises the steps: carrying out the radiometric calibration and atmospheric correction of the data of a visible short-wave infrared hyperspectral camera AHS I carried by the domestic hyperspectral observation satellite (GF-5B, Gaofen-5 B satellite); generating a carbon monoxide unit absorption spectrum by using a medium-resolution atmospheric transmission model MODTRAN; inverting a carbon monoxide enhancement value by adopting a matched filtering method; generating a binary plume mask through threshold segmentation; and constructing a deep learning model based on a residual neural network ResNet network, and realizing plume pixel-level identification and carbon monoxide column concentration enhancement value prediction. The method can identify the carbon monoxide plume with high precision and high efficiency, and is suitable for atmospheric pollution monitoring and pollution source quantification.
Owner:ANHUI UNIV

Rock-fill dam deformation digital twinborn body construction method based on generative AI

The invention discloses a rock-fill dam deformation digital twin construction method based on generative AI, and the core is that a conditional denoising diffusion probability model is adopted, a conditional sampling mechanism is constructed through classifier-free guidance and continuous conditional vectors, and finite element simulation data, monitoring data and operation data are efficiently fused. And further combining a residual neural network ResNet-18 and a K-means clustering method to carry out finite element data unsupervised classification, introducing combinatorial optimization, and identifying a finite element data category which is most matched with monitoring data, so that the condition-guided deformation field is generated. The framework is applied and verified on the highest two-estuary rockfill dam (303 meters) in the current built world. The result shows that the rockfill dam deformation digital twinborn body construction method based on the generative AI can efficiently reconstruct rockfill dam deformation, has high precision and real-time performance, remarkably improves the global deformation thorough sensing ability of the rockfill dam, and provides key technical support for safe operation of the rockfill dam.
Owner:WUHAN UNIV

Territorial space planning multi-modal data alignment method

The invention provides an alignment method for territorial space planning multi-modal data, and belongs to the technical field of big data processing.The alignment method comprises the steps that a quadtree structure is adopted to segment a remote sensing image, a three-dimensional index is established, a graph segmentation algorithm is utilized to divide vector data space subgraphs, a space-time weight matrix fusing space weight, time weight and credibility weight is constructed, and the three-dimensional index is established; inputting the preprocessed multi-modal data into a multi-modal semantic fusion model comprising a residual neural network, a bidirectional encoder and a graph convolutional network to extract a unified semantic representation vector, identifying conflict data by calculating semantic similarity, constructing a rule priority directed graph, and calculating a rule importance score by adopting a random walk algorithm; and executing the conflict resolution rule according to the priority and outputting the aligned data set. The technical problem that efficient alignment of the multi-source heterogeneous territorial space planning data on the semantic level is difficult to realize is solved.
Owner:JIANGXI PROVINCIAL LAND & SPACE SURVEY & PLANNING RES INST

Small sample radiation source data enhancement and individual identification method based on equipotential constellation diagram

The present invention proposes a method for data enhancement and individual identification of small-sample radiation sources based on equipotential constellation diagrams, comprising the following steps: preprocessing the collected I / Q signals emitted by the radiation source, and mapping the one-dimensional I / Q signal sequence data onto a two-dimensional equipotential constellation diagram image. An improved generative adversarial network is used to perform data enhancement on the two-dimensional equipotential constellation diagram of the I / Q signal sample, and a structural similarity measurement method is used to screen the generated equipotential constellation diagram to optimize the quality of the generated samples. A residual neural network recognition model is constructed, and the generated sample data set is merged with the original data set for model training. Finally, the obtained radiation source recognition model identifies the radiation source device in the small-sample scenario. By comprehensively applying technologies such as mapping the I / Q signal sequence data to images, data enhancement and screening, the model provides an effective solution for individual identification of radiation sources in small-sample scenarios.
Owner:HOHAI UNIV

Watermarking method and device suitable for input of image with any resolution

The invention discloses a watermarking method and device suitable for any resolution image input, and the method comprises the steps: generating a fixed low-resolution watermark residual error through a watermark encoder according to an input carrier image and a watermark message, restoring the watermark residual error to the size of the carrier image, and superposing the watermark residual error with the carrier image to obtain a watermark-containing image; designing a watermark discriminator based on the residual neural network, wherein the watermark discriminator is used for distinguishing the difference between the watermark-containing image and the carrier image; a watermark noise layer is used for simulating various distortion operations suffered by an image under a digital channel, and disturbance is applied to the watermark-containing image processed by a watermark discriminator; and transmitting the watermark-containing image to which the disturbance is applied in a real channel, inputting the watermark-containing image into a robust watermark decoder, and decoding and extracting a watermark message. According to the method and the device, image input of any resolution can be processed, good invisibility and robustness can be kept, and copyright protection and leakage traceability of the image of any resolution can be realized.
Owner:UNIV OF SCI & TECH OF CHINA

Automatic control method and system for fumaric acid production

The invention discloses an automatic control method and system for fumaric acid production. The method comprises the following steps: collecting process variables in a fermentation process; constructing a soft measurement model fusing physical modeling and a residual neural network to obtain an acid production rate prediction value and prediction confidence; calculating a feed-forward control quantity, and adjusting the weight according to the prediction confidence to obtain a feed-forward control output; constructing a state vector, and establishing a Markov decision process; training a neural network control strategy by adopting a near-end strategy optimization algorithm, and outputting a proportionality coefficient, an integral coefficient and a differential coefficient; calculating feedback control quantity, fusing the feedback control quantity with feed-forward control output, and applying change rate and amplitude limitation to obtain final control output; and switching to a feedback priority control mode under a specific condition, and regularly updating a soft measurement model and a control strategy parameter. According to the invention, high-precision stable control of pH in the fumaric acid fermentation process is realized, the production efficiency and the process robustness are improved, and the method is suitable for automatic control of the large-scale fermentation process.
Owner:SHANXI JINGBOLI NEW MATERIALS CO LTD

Multi-stage evaluation electric power system short circuit and open circuit fault diagnosis method

A multi-stage evaluation electric power system short circuit and open circuit fault diagnosis method comprises the steps that voltage and current sensors and fault recording devices are installed at key nodes such as a main transformer and a distribution line, and three-phase voltage and current waveform data and zero-sequence components are collected in real time and transmitted to a fault diagnosis server; the server firstly performs preliminary judgment and alarm triggering on short circuit, open circuit and one-way grounding / electric leakage faults, then performs discrete wavelet decomposition and multi-scale time-frequency domain feature extraction on acquired waveforms by using a deep fault classification model based on wavelet analysis and neural network fusion, and realizes fine classification of the faults through a multi-layer residual neural network. And finally, establishing a fault diagnosis result self-adaptive evaluation and response mechanism, dynamically adjusting an alarm level and a switching scheme according to a fault type, realizing protection equipment tripping and fault isolation for a short-circuit fault, generating a standby line switching suggestion for an open-circuit fault, and effectively improving the accuracy and coping capacity of power system fault diagnosis.
Owner:NANJING INST OF MECHATRONIC TECH

Power distribution equipment state detection method and device based on multi-modal data fusion, terminal equipment and storage medium

The invention discloses a power distribution equipment state detection method and device based on multi-modal data fusion, terminal equipment and a storage medium, and belongs to the field of power distribution equipment. Performing feature analysis on the acquired multi-modal data by using a time sequence convolutional network, a residual neural network and a Transform network to obtain a local abnormal fluctuation feature, an infrared temperature spatial distribution feature and a video global feature representation; performing feature splicing on the local abnormal fluctuation feature, the infrared temperature spatial distribution feature and the video global feature representation to obtain a fusion feature, and inputting the fusion feature to a long-short term memory network to obtain a historical hidden state sequence; and determining the equipment state of the to-be-detected power distribution equipment according to the historical hidden state sequence, the fusion features and edge equipment deployed in the local network domain of the equipment. By implementing the application, the problem of low accuracy of state analysis of the power distribution equipment caused by only depending on single modal data in the prior art can be solved.
Owner:ELECTRIC POWER RES INST OF GUANGDONG POWER GRID CO LTD

Oil type gas laser monitoring and early warning device and method

The invention relates to the technical field of oil type gas monitoring, in particular to an oil type gas laser monitoring and early warning device and method, and the device comprises a processor control panel, a laser driver, a laser device group, a light path change-over switch, a diffusion type light absorption cell and a tuning fork detector; emergent laser with different gas spectrum absorption wavelengths is generated; switching each path of laser beam to a diffusion type absorption cell; respectively demodulating based on the acquired acquisition signals to obtain second harmonic signal voltages of optical signals of methane, ethane and hydrogen sulfide gas; inputting the second harmonic signal voltage of the optical signal absorbed by the to-be-detected gas into the residual neural network, identifying the methane and ethane gas overlapping spectrum, and outputting the methane and ethane gas concentration in the to-be-detected gas; and generating a multi-parameter early warning signal according to the methane and ethane gas concentrations and the hydrogen sulfide concentration. The light absorption detection can be accurately carried out on methane, ethane and hydrogen sulfide in the oil type gas, and the methane and ethane gas overlapping spectrum can be effectively identified.
Owner:HUANENG COAL TECH RES CO LTD +1

A bearing fault detection method based on a residual neural network with cross-attention mechanism

This invention belongs to the field of fault detection and relates to a bearing fault detection method based on a residual neural network using a cross-attention mechanism. The fault detection method comprises the following steps: First, preprocessing the input data; second, extracting features from the data; third, fusing the data features; fourth, detecting data defects; and fifth, inputting the processed data into the network to obtain the corresponding fault detection category and result. This invention has a wider applicability to bearing fault data and higher accuracy, effectively improving the accuracy and speed of bearing fault detection in complex environments. Through the cross-attention mechanism, data features can be extracted more effectively.
Owner:DALIAN UNIV OF TECH

High-precision single well stratigraphic division method and device

The embodiment of the invention provides a high-precision single well stratigraphic division method and device, and relates to the field of oil and gas field exploration and development, and the method comprises the steps: determining a multi-dimensional original vector group according to parameter data of all sampling points of a single well and a preset window value; inputting the multi-dimensional original vector group into a residual neural network model for window division and feature processing to obtain a feature vector group of each window; calculating the feature vector groups of every two adjacent windows through a clustering algorithm, and determining the clustering distance of every two adjacent windows; clustering the sampling points in each window according to the clustering distance to obtain a clustering result; and performing stratigraphic section division on the single well based on the clustering result to obtain a corresponding stratigraphic section division result. Through the method provided by the invention, the accuracy of stratigraphic division is improved.
Owner:PETROCHINA CO LTD

Wireless signal automatic modulation identification method based on CGAF and residual error identification network model

The invention discloses a wireless signal automatic modulation identification method based on a CGAF and a residual error identification network model, and the method comprises the steps: firstly, enabling the I, Q and I / Q one-dimensional time features of a wireless signal to be mapped to a two-dimensional space image domain through a complex number field Gramb angle field algorithm; therefore, the technical bottlenecks of high time domain feature similarity and low feature space separability of a modulation mode are effectively solved. On the basis, a channel segmentation residual neural network is designed as a classifier, feature extraction is performed through channel segmentation and an attention mechanism, and information is simplified by using a residual module, so that the classification precision of a modulation mode and the system robustness are remarkably improved. According to the method provided by the invention, the accuracy and robustness of modulation recognition are remarkably improved in a complex wireless channel environment, the problems of single feature and insufficient model learning ability of a traditional method are solved, and reliable technical support is provided for application of automatic modulation recognition in the fields of cognitive radio, military reconnaissance and the like.
Owner:HEBEI UNIV OF TECH