26 results about "Matrix decomposition algorithms" patented technology

The invention relates to the technical field of optical detection, in particular to a notebook computer shell injection molding part surface quality detection method and system, and the method comprises the steps: irradiating a standard part with a preset wave band according to preset parameters through an infrared spectrometer to obtain a first spectrogram, and irradiating the injection molding part with the preset wave band according to the preset parameters to obtain a second spectrogram. Through the synergistic effect of a non-negative matrix factorization algorithm and a Transform fusion model, the problem of spectrum overlapping caused by addition of a flame retardant is effectively solved, through seven-degree polynomial and smooth second derivative processing, the carbonyl peak position measurement error is further reduced, and compared with a traditional Fourier transform infrared spectroscopy, the feature parameter extraction precision is further improved. The number of the carbonyl absorption peaks and the positions of the carbonyl absorption peaks are compared with the standard threshold values twice, so that the problem that some qualified products are mistakenly considered as non-qualified products easily due to deviation during judgment of the carbonyl content of the injection molding shell of the notebook computer is further solved.

The invention relates to a three-component high-dimensional seismic data reconstruction method and device based on vector tensor reduced rank, a medium and equipment, and the method comprises the steps: firstly, placing three-component high-dimensional seismic data at three imaginary part positions of a quaternion array in a time domain through employing a quaternion tool, and setting a real part of the quaternion array to be 0 value; and realizing vector joint representation of the quaternion-based three-component seismic data. Quaternion representation can protect the nonlinear orthogonal relation of three component seismic data in the space direction, and vector field structural characteristics of seismic waves are kept. And secondly, transforming a time domain quaternion array into a frequency domain by using quaternion Fourier transform, extracting a spatial high-dimensional quaternion array corresponding to each frequency domain slice, and performing missing data restoration and reconstruction on the high-dimensional quaternion array by using a tensor reduced-rank reconstruction technology based on a quaternion parallel matrix decomposition algorithm. According to the method, the memory occupation amount is remarkably reduced, the calculation amount is small, the calculation cost is low, and the reconstruction calculation efficiency is high.

The invention provides a quantum circuit system based on an AES cryptosystem and an encryption method. The quantum circuit system based on the AES cryptosystem comprises a byte replacement module which adopts a pre-optimized S-box query circuit to realize non-linear byte replacement; the row shift module completes in-row byte cyclic shift through quantum bit exchange operation; the column confusion module realizes a matrix multiplication circuit based on finite field operation, and a quantum circuit of the column confusion module is generated by a depth-first matrix decomposition algorithm; and the round key adding module realizes XOR operation of a round key and a state by using a CNOT gate array, and a key required by the round key adding module is dynamically generated through a key expansion circuit. And a compact Z-shaped architecture is adopted to optimize time sequence scheduling and resource allocation of each module. On the premise of keeping the quantum bit resource usage amount equivalent to that of an original Z-shaped architecture, the quantum circuit depth is remarkably reduced, and higher fidelity and shorter execution time can be realized on NISQ equipment.

The present invention discloses a method and system for on-demand intelligence distribution, comprising the following steps: (1) receiving superior telegraphic information to obtain action tasks and intelligence information; (2) extracting features: commander features, action task features, and intelligence features; (3) error processing and model optimization; and (4) outputting intelligence in order of interest based on the optimized model. The present invention preprocesses task and intelligence text using an improved linear discriminant analysis method, encodes task and intelligence data using a sparse edge denoising autoencoder, and uses a matrix decomposition algorithm to remove blank portions of the matrix for dimensionality reduction, thereby effectively improving the accuracy of the training model, while also increasing the precision of on-demand intelligence distribution and enhancing the command efficiency of commanders.

The invention discloses a fitness quality evaluation method based on myoelectricity and images, which comprises the following steps: step 1, data acquisition: the acquired data comprises original myoelectricity data with time sequence information and time sequence image data of fitness actions; step 2, preprocessing the collected data; step 3, for the preprocessed myoelectricity data, extracting myoelectricity characteristics through a sliding window by adopting a time domain intermediate frequency value model, and then decomposing a muscle activation degree matrix into a collaborative structure factor matrix and an activation coefficient matrix through a non-negative matrix decomposition algorithm; for the preprocessed time sequence image data, adopting a BlazePose algorithm to extract 33 3D articulation points in the time sequence image data and calculating the Euler angles of the articulation points so as to obtain attitude angle features; and step 4, using a support vector machine to fuse the myoelectricity features and the attitude angle features to carry out action scoring. The method can effectively improve the fitness quality of the user.

The invention relates to the technical field of embryonic development evaluation, and discloses an embryonic chromatin openness and gene expression evaluation method, which comprises the following steps: extracting an embryonic cell sample with a survival rate of more than or equal to 95% through a micromanipulation technology; acquiring chromatin open signal data by adopting an ATAC-seq technology; carrying out genome positioning by utilizing a BWA comparison tool, and constructing a three-dimensional contact matrix through a matrix decomposition algorithm in combination with Hi-C data; determining the gene expression quantity by adopting fluorescent quantitative PCR (Polymerase Chain Reaction); and constructing an XGBoost integrated learning model to fuse chromatin characteristics and gene expression data. By optimizing micromanipulation parameters and an ATAC-seq experimental process, the cell survival rate is increased to 95.2 + / -1.3%, the ATAC-seq library complexity reaches 85.3%, and Hi-C data standardization processing is combined, so that the technical problem of data deviation is solved, and the embryo sample processing efficiency and data reliability are remarkably improved.

This invention provides a method, medium, and system for acoustic early warning of thermal runaway in lithium-ion batteries based on feature reconstruction, belonging to the field of lithium-ion battery technology. The invention constructs a positive sample set by collecting safety valve opening sounds through multi-condition thermal runaway experiments, and expands the samples using data augmentation. Multi-resolution Mel spectra are extracted from the audio signals. These Mel spectra are then input into a complex-domain phase-aware separation model for joint estimation of complex-domain amplitude masking and phase residuals. Physical prior corrections are applied to the reconstruction results using a sound source separation algorithm based on wave equation time-frequency inverse scattering and a low-rank sparse time-frequency matrix decomposition algorithm based on random matrix theory. The three corrected signals are weighted and fused to obtain a corrected Mel spectra, which are finally input into a temporal convolutional network to classify and identify the safety valve opening sounds and output a thermal runaway early warning signal. This invention solves the technical problem of insufficient accuracy in thermal runaway early warning caused by acoustic feature reconstruction distortion in complex noise environments.

The invention relates to a TSN (Time Sensitive Network) timestamp recovery method based on an FPGA (Field Programmable Gate Array), which belongs to the technical field of TSNs and comprises the following steps of: S1, collecting synchronous messages of different TSN nodes in parallel by multiple ports of the FPGA, and analyzing timestamp data by taking a message serial number as an anchor point; s2, constructing an incomplete timestamp matrix and a mask matrix by adopting a time sliding window mechanism, and automatically marking missing data; s3, a random index set is generated through LFSR, and matrix sparse sampling is achieved through a bitmap judgment unit; and S4, based on an FPGA accelerated CUR matrix decomposition algorithm, solving a pseudo-inverse matrix through parallel MGS-QR decomposition, and reconstructing a complete timestamp matrix through block parallel matrix chain multiplication. The FPGA parallel architecture, ping-pong cache and fixed-point number processing are adopted, microsecond-level low-delay recovery is achieved, hardware resource occupation is greatly reduced, robustness in a severe network environment is improved, and the method is suitable for a high-precision clock synchronization scene of an industrial TSN node.

The invention provides a credit card application processing method and device, equipment, a medium and a product, relates to the field of artificial intelligence, and can be applied to the field of financial science and technology. Comprising the steps that credit card information of a target user is acquired, and the target user is a user who fills in credit card application information but does not submit the credit card application information; the credit card information of the target user is analyzed by adopting a caching technology and a data matching algorithm, intra-bank credit card information of the target user is determined, and the intra-bank credit card information is used for indicating that an intra-bank credit card is held or not held; if the intra-bank credit card information represents that the target user does not hold the intra-bank credit card, target feature information in the credit card information is extracted according to an auto-encoder algorithm; according to the target feature information and the matrix decomposition algorithm, the first service information is pushed to the target user, the first service information is information of at least one target credit card determined according to the demand of the target user, the application efficiency of the credit card is improved, and the satisfaction degree of credit card application of the user is improved.

The present application relates to the field of group portrait, disclose a kind of user portrait generation method, device, computer equipment and storage medium, its method includes: obtaining user interaction history record;According to user interaction history record generates user intent data, user intent data includes each user's flow node and node intent, a flow node corresponds to a node intent;According to user intent data constructs g×c two-dimensional matrix, wherein, g is total number of users, c is total number of node intent;Two-dimensional matrix is decomposed into first matrix and second matrix by non-negative matrix decomposition algorithm, first matrix is g×p matrix, second matrix is p×c matrix, and p is self-defined dimension;According to first matrix and second matrix, construct a number of group user portraits.The user portrait generated by the present application is highly matched with the intelligent customer service system, and the reply satisfaction of the intelligent customer service system can be improved.

The application discloses a kind of early identification methods of fire smoke image based on multi-modal fusion, comprising the following steps: S1, acquisition multi-modal data and carry out time alignment;S2, construct visible light branch, infrared branch and photoacoustic branch, generate multi-modal feature and store into shared feature pool;S3, embedding space-time tracking module in shared feature pool, generate global feature representation;S4, generate dynamic background template using low-rank matrix decomposition algorithm, separate and remove background noise;S5, by light self-attention mechanism in shared feature pool fusion multi-modal feature and compensate missing features;S6, by sparse feature enhancement algorithm enhances early smoke signal, and applies multi-task classification network to fire state classification and smoke diffusion path prediction;S7, by dynamic feedback mechanism updates shared feature pool and space-time tracking module.The application utilizes multi-modal fusion, space-time tracking and dynamic feedback method, realizes the early accurate identification of fire smoke.

The invention discloses a multi-scene single-frame large-view-field scattering imaging method based on polarization coding and spatial multiplexing, and the method comprises the steps: building a reflection-type scattering imaging system and a transmission-type scattering imaging system, and respectively measuring the OME ranges of the reflection-type scattering imaging system and the transmission-type scattering imaging system; multiple spatial multiplexing speckles are collected through single exposure of a polarization camera, and a linear multiplexing model is constructed; a signal identification method based on a minimum mean square error and an N-FINDR algorithm are introduced to realize target number identification and polarization specificity speckle initial value extraction; designing a Laplacian regularization term constrained Cozishi non-negative matrix factorization algorithm, and analyzing polarization specific speckles of different OME regions by using the extracted target number and initial value iterative optimization; and reconstructing a speckle result by using a phase recovery algorithm, and hiding the target after recovering the scattering medium. According to the method, the view field range is expanded by 4.5 times in a transmission-type / reflection-type system, the fidelity of a demultiplexing result reaches 32dB, and hidden scene reconstruction without continuous acquisition is realized.

The invention relates to a decentralized recommendation method with privacy protection performance, which is designed based on a matrix decomposition algorithm and a block chain and is used for providing privacy protection in a recommendation system. By introducing the block chain technology, the single-point fault risk in traditional centralized federated learning is eliminated, and the privacy protection capability is enhanced. In the model training period, a user locally trains a model containing private parameters and public parameters, but only shares the public parameters, so that leakage of original private data and the private parameters of the user is avoided, meanwhile, quantitative analysis is performed on privacy protection performance of the method, the total probability of privacy leakage is deduced, and the user experience is improved. And a theoretical basis is provided for evaluating the privacy protection intensity of the user.

The application discloses a multi-scene single-frame large-field-of-view scattering imaging method based on polarization encoding and spatial multiplexing, and comprises the following steps: a reflection type and a transmission type scattering imaging system are built, and the OME ranges of the two systems are measured; a linear multiplexing model is constructed by collecting multiple spatial multiplexed speckles through a single exposure of a polarization camera; a signal recognition method based on minimum mean square error and an N-FINDR algorithm are introduced to realize target number recognition and polarization-specific speckle initial value extraction; a Cauchy non-negative matrix decomposition algorithm with a graph Laplace regularization term is designed, and the extracted target number and initial value are iteratively optimized to analyze the polarization-specific speckles in different OME regions; and a phase recovery algorithm is used to reconstruct the speckle results, and hidden targets in a scattering medium are recovered. The method can expand the field of view range by 4.5 times in the transmission type / reflection type system, the fidelity of the demultiplexing result reaches 32 dB, and the hidden scene reconstruction is realized without continuous collection.

The application discloses a transcription factor regulation network modeling method based on single cell transcriptome data, comprising the following steps: S1, extracting multi-phenotype single cell omics data, performing data cleaning, and integrating the cleaned data; S2, based on a biological knowledge base, analyzing the data processed in S1, and constructing a prior inter-molecular interaction relationship network; S3, based on a multi-factor non-negative matrix factorization algorithm, establishing a multi-dimensional molecular synergistic interaction relationship module according to the data processed in S1 and the prior inter-molecular interaction relationship network in S2; S4, calculating the interaction relationship module related to the phenotype of the multi-dimensional molecular synergistic interaction relationship module; and S5, visualizing and exporting the interaction relationship between the multi-dimensional molecular synergistic interaction relationship module and the phenotype. With the aid of single cell sequencing technology and prior biological knowledge, the application extracts multi-dimensional molecular synergistic regulation relationship in high-dimensional single cell omics data, and obtains a transcription factor-gene function synergistic regulation interaction mechanism closely related to phenotype changes.

The invention belongs to the technical field of image processing, and particularly relates to a dietary tracking image processing method based on non-negative matrix blind source separation, which comprises the following steps: acquiring a dietary image, and preprocessing the dietary image; inputting the preprocessed image into a Unet network for food image classification; analyzing the classified food images by adopting a non-negative matrix factorization algorithm to obtain different types of food images; converting different types of food images into an HSV color space, and performing thresholding processing on the food images converted into the HSV color space; obtaining an independent food image according to the image after thresholding processing; calculating volumes of the individual food images; determining the nutrient intake of the user according to the volume of the food image and the type and number of the food image, and realizing diet tracking of the user; according to the method, spatial constraint non-negative matrix blind source separation is introduced, the local structure and spatial correlation of the image are reserved, stacked or semi-covered food materials with similar colors / textures are effectively distinguished, and the accuracy of component separation in a mixed scene is remarkably improved.

The invention discloses a gene multi-omics data fusion method in a modal deletion scene, and relates to the field of bioinformatics, and the method comprises the steps: carrying out the preprocessing and feature screening of each kind of omics data of a sample; adopting a non-negative matrix factorization algorithm to obtain common potential representations of the samples, and constructing hyperedges based on cosine similarity between the common potential representations; extracting omics data features as hypergraph nodes by using the prototype network layer and the linear layer; similar sample information is aggregated through a hypergraph information propagation mechanism, a missing mode is interpolated in a potential space, and an existing mode and auxiliary information are fused to enhance a representation learning effect; and inputting the interpolated and enhanced feature representation into a multi-modal learning module, and carrying out multi-modal data fusion and prediction result output. According to the deletion mode completion method based on the hypergraph neural network, the deep learning technology is combined with knowledge in the gene multi-omics field, and therefore the purposes of data noise reduction, deletion mode completion, efficient prediction and the like are achieved.

The application provides a quantum circuit system and encryption method based on AES encryption system, which comprises a byte substitution module, a row shift module and a column confusion module; the byte substitution module uses a pre-optimized S-box query circuit to realize nonlinear byte substitution; the row shift module completes the cyclic shift of the bytes in the row through a quantum bit exchange operation; the column confusion module realizes a matrix multiplication circuit based on finite field operation, wherein the quantum circuit of the column confusion module is generated by a depth-first matrix decomposition algorithm; the round key addition module uses a CNOT gate array to realize the XOR operation of the round key and the state, and the required key of the round key addition module is dynamically generated through a key expansion circuit. The timing scheduling and resource allocation of each module are optimized by using a compact Z-shaped architecture. Under the premise of keeping the quantum bit resource usage equivalent to the original Z-shaped architecture, the quantum circuit depth is significantly reduced, and higher fidelity and shorter execution time can be realized on NISQ devices.

The application discloses a high-capacity vehicle clustering method and system based on an information-physical dual network, which comprises the following steps: firstly, constructing a physical network topology graph corresponding to the current network of vehicles, and calculating a vehicle mobility correlation index; then, constructing a physical network topology graph corresponding to the current network of vehicles, and calculating a link transmission quality; further, superimposing the physical network and the information network by weighted summation, calculating a correlation density under a comprehensive network, and further establishing an optimal clustering model based on the correlation density; finally, using a matrix decomposition algorithm to approximately solve, and obtaining a final clustering result. In the calculation process, the channel fading under the LOS and NLOS environments is considered, and a channel link capacity calculation method is given through a matrix mother function. The method can reflect the stability of the physical topology, and can also reflect the link transmission quality of the whole channel, so that the VC construction with a more efficient transmission structure can be realized.

The invention discloses a new energy power system false load data detection and recovery method and system, and the method comprises the steps: carrying out the attack behavior modeling of load data, and obtaining an attack model; when it is monitored that the data of the power system is abnormal, the constraint of the obtained attack model is converted into a mathematical decoupling condition through a matrix decomposition algorithm so that the abnormal data can be processed subsequently, an attack amplitude and a position matrix are identified, and a GoDec algorithm is adopted to decompose a problem into two sub-problems of low-rank matrix estimation and sparse matrix updating; iterative solution is carried out, so that an attack amplitude and a position matrix are identified, and a recovered load matrix is obtained; obtaining recovered load data, and evaluating errors; and adopting a compact mixed integer linear programming model to carry out unit commitment optimization decision on the recovered load data, and adding compact constraints. According to the method, attack modeling, the GoDec algorithm and optimization decision are fused, high-efficiency detection and recovery of false load data are realized, and the security, stability and economy of the system are improved.

The application provides a new type of single-channel-based fetal heart detection algorithm, first uses a single-channel body surface bioelectricity collection device to collect pregnant woman abdominal bioelectricity data, wherein the data contains fetal electrocardiosignal and other mother and baby physiological signals; then uses wavelet transform and singular value decomposition algorithm to reconstruct the pregnant woman reference electrocardiosignal, uses an adaptive filtering algorithm to eliminate most of the interference physiological signals; then uses wavelet transform, singular value decomposition and digital band-pass filter to reconstruct the fetal electrocardiosignal, obtains the fetal electrocardiogram curve, and simultaneously uses time-frequency domain transform algorithm, non-negative matrix decomposition algorithm and power spectral density to obtain accurate fetal heart rate. The algorithm is a single-channel non-invasive passive fetal electrocardiosignal analysis algorithm, is convenient to operate, is reliable in performance, can accurately obtain fetal electrocardio information, and provides a basis for non-invasive fetal heart monitor product design based on body surface bioelectricity signal collection and analysis.

This invention discloses an objective fatigue state recognition method based on EEG classifier-assisted annotation, belonging to the field of human-computer interaction and biosignal processing technology. The method includes: simultaneously acquiring EEG, EMG, and eye-tracking video signals from the subject; weighting the EEG channels and extracting frequency domain features using a non-smooth, non-negative matrix factorization algorithm to construct a MobileNetV2 EEG classifier; extracting eye-tracking features using an improved Unet algorithm incorporating an attention mechanism and elliptic fitting error loss; automatically annotating the eye-tracking data using the EEG classifier and setting a threshold for fuzzy sample exclusion; and fusing the outputs of the EEG classifier and the eye-tracking sub-classifier at the decision level using D-S evidence theory to construct a comprehensive fatigue recognition model and form a closed-loop optimization paradigm. This invention solves the bottleneck problem of high-quality annotation of cross-modal fatigue data, significantly improving the objectivity and accuracy of fatigue recognition, and can be widely applied in safety-critical fields such as aviation, rail transportation, and long-distance driving.

The application relates to an airborne dual-frequency high-resolution SAR image fusion method, device, equipment and medium. The method comprises the following steps: performing multi-scale transformation on a first source image and a second source image which have been accurately registered to obtain low-frequency sub-band coefficients and high-frequency sub-band coefficients in each direction corresponding to the first source image and the second source image; obtaining an observation matrix in the form of additive noise according to the low-frequency sub-band coefficients corresponding to the first source image and the second source image, decomposing the observation matrix by using a non-negative matrix decomposition algorithm to obtain a feature matrix, performing non-negative matrix decomposition on the feature matrix to obtain low-frequency fusion coefficients; combining the high-frequency sub-band coefficients in each direction by using an improved Laplace energy sum to obtain high-frequency fusion coefficients; and performing inverse transformation on the low-frequency fusion coefficients and the high-frequency fusion coefficients to obtain a fusion image. The method can obtain a high-frequency and low-frequency SAR fusion image with higher resolution, more comprehensive information and smaller distortion.

The invention belongs to the technical field of information remote sensing, and particularly discloses a large-scale port bridge target accurate identification method based on distributed polarization three-dimensional SAR data, and the method comprises the steps: obtaining real-time visibility data and a multi-band polarization signal of a polarization synthetic aperture radar according to a port meteorological sensor network; amplitude correction is carried out on the multi-band polarized signal through a radiation calibration coefficient; calculating an atmospheric attenuation compensation parameter according to the visibility data to obtain corrected polarization scattering data; according to the corrected polarization scattering data, scattering components in different polarization states are extracted based on a scattering matrix decomposition algorithm, noise interference in the scattering components is filtered out through a coherence preserving algorithm, and a pure polarization feature vector containing bridge component information is obtained; the objective of the invention is to solve the problems of radar signal attenuation and insufficient component identification precision caused by visibility change in a port environment in the prior art.

The embodiment of the invention relates to a model processing method and device, equipment and a medium. The method comprises the steps that a target task model and a basic model are acquired; wherein the model parameters of the basic model are adjusted based on the target task data sample to obtain a target task model; obtaining a weight difference model matrix of the target task model and the basic model; and decomposing the weight difference model matrix according to a preset matrix decomposition algorithm to obtain a low-rank matrix, and associatively storing the low-rank matrix and the target task identifier for executing the target task. By adopting the technical scheme, the low-rank matrix is obtained by decomposing the weight difference model matrix of the target task model and the basic model, and the extracted low-rank matrix is ensured to have high fidelity and practicability, so that the low-rank matrix of the target task model can be stored, and the accuracy of the extracted low-rank matrix is improved. And the storage and deployment cost is greatly reduced while the model effect is maintained.

A service soldier training and certification system includes a processing module that performs the following steps: collecting and preprocessing multimodal data to obtain skill increment feature components; establishing a digital twin roulette model, adjusting the weights of corresponding skill points in the digital twin roulette model according to the skill increment feature components and / or external feedback components, and obtaining a skill point weight matrix; obtaining a standardized course feature matrix, calculating the cosine similarity between the skill point weight matrix and the standardized course feature matrix to obtain a course content matching score; obtaining a service soldier-course cross-feature matrix and processing it based on a matrix factorization algorithm to obtain a course prediction score; linearly weighted summing to obtain the final course score, sorting the courses in the database according to the final course score, generating a course recommendation list for each registered service soldier, and pushing it out. This application can provide service soldiers with dynamic, personalized, and quantifiable training paths.