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1324 results about "Data dimension" patented technology

Human body action recognition method and mobile intelligent terminal

The invention discloses a human body action recognition method and a mobile intelligent terminal. The human body action recognition method comprises the steps that human body action data are acquired for training so that feature extraction parameters and template data sequences are obtained, and the data requiring performance of human body action recognition are acquired in one time of human body action recognition so that original data sequences are obtained; feature extraction is performed on the original data sequences by utilizing the feature extraction parameters, and the data dimension of the original data sequences is reduced so that test data sequences after dimension reduction are obtained; and the test data sequences and the template data sequences are matched, and generation of human body actions corresponding to the template data sequences to which the test data sequences are correlated is confirmed when the successfully matched test data sequences exist. Dimension reduction is performed on the test data sequences so that the requirements for the human body action attitudes are reduced, and noise is removed. Then the data after dimension reduction are matched with the templates so that calculation complexity is reduced, accurate human body action recognition is realized and user experience is enhanced.
Owner:GOERTEK INC

Method of deep neural network based on discriminable region for dish image classification

The invention discloses a method of deep neural network based on a discriminable region for dish image classification. The method relates to the field of image processing, integrates a significant spectrum pooling operation, and fuses low-level features and high-level features in a network. The method adopts a convolution kernel filling operation, effectively preserves important information on characteristic spectra, and is matched with data dimensions of a full connection layer, so that the full connection layer can utilize a VGG-16 pre-training model at a training state, thereby improving the training efficiency and network convergence speed. Each image to be classified is subjected to normalization processing based on the model which is learned in a constructed database, the image is tested by using a trained convolutional neural network, the classification precision is measured by using Softmax loss, a classification result of the image is obtained, real categories and predicted categories of targets in all test images are compared, and a classification accuracy rate is obtained through calculation. The method is used for testing on a self-established data set CFOOD90, and theeffectiveness and the real-time performance of the method are verified.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Hexapod-robot real-time gait planning method based on deep reinforcement learning

InactiveCN107450555AEnables real-time gait planningFast convergencePosition/course control in two dimensionsSimulationGait
The invention provides a hexapod-robot real-time gait planning method based on deep reinforcement learning. The method comprises the following steps of using a hexapod robot to acquire environment road condition information and making an integral movement track; through a camera, acquiring an environment photograph, according to the photograph, using a binocular range finding method to calculate road condition information of a target track, and using the calculated road condition information of the track in robot center of mass movement track navigation; in a foot end swinging space range of robot legs, taking photographs of a road condition environment, and through a trained deep reinforcement learning network based on a depth determinacy policy gradient (DDPG), carrying out data dimension reduction and feature extraction on the photograph; and according to a feature extraction result, acquiring a control policy of a hexapod robot, wherein the hexapod robot controls foot laying of a robot according to the control policy so that real-time walking of the hexapod robot is realized. By using the gait planning method, a complex and non-structural environment of a road condition can be planned in real time. The method has an important meaning for increasing an environmental adaptive capacity of the hexapod robot.
Owner:唐开强

Automatic recognition and classification method of electrocardiogram heartbeat based on artificial intelligence

The embodiment of the invention relates to an automatic recognition and classification method of electrocardiogram heartbeat based on artificial intelligence. The method includes the following steps that received original electrocardiogram digital signals are processed, and heartbeat time sequence data and lead heartbeat data are obtained; according to the heartbeat time sequence data , the lead heartbeat data is cut to generate lead heartbeat analysis data; the lead heartbeat analysis data is subjected to data combination, and a one-dimensional heartbeat analysis array is obtained; accordingto the one-dimensional heartbeat analysis array, data dimension amplification and conversion are conducted, and four-dimensional tensor data is obtained; the four-dimensional tensor data is input to aLepuEcgCatNet heartbeat classification model obtained through training, and heartbeat classification information is obtained. The method overcomes the defect that a traditional method only depends onsingle lead independent analysis for result summary statistics and thus classification errors are more easily obtained, and the accuracy of the electrocardiogram heartbeat classification is greatly improved.
Owner:SHANGHAI LEPU CLOUDMED CO LTD

Hyper-spectral remote sensing image classifying method based on AdaBoost

The invention discloses a hyper-spectral remote sensing image classifying method based on AdaBoost. A traditional mode identification method cannot meet the requirements of carrying out high-efficiency and high-precision classification on hyper-spectral data with high data dimensions and great data quantity; and although a neural network and a support vector machine can effectively classify remote sensing data, an ideal selection method of parameters does not exist. The hyper-spectral remote sensing image classifying method based on the AdaBoost comprises the following steps of: pre-processing the hyper-spectral data to remove abnormal wave bands influenced by factors including atmosphere absorption and the like; then utilizing MNF (Minimum Noise Fraction) conversion to carry out wave band preferential selection to achieve the aims of optimizing data, removing noises and reducing dimensions of the data; then, dividing a training sample and a test sample; selecting a decision stump as a weak classifier and utilizing an AdaBoost algorithm to train the weak classifier to obtain a strong classifier; selecting suitable iterations; and finally, utilizing a one-to-one method to establish a plurality of the classifiers. According to the hyper-spectral remote sensing image classifying method based on the AdaBoost, the convergence rate is enhanced and the classification performance of a hyper-spectral image is improved.
Owner:徐州智控创业投资有限公司

Frequency domain full-waveform inversion seismic velocity modeling method

The invention relates to a frequency domain full-waveform inversion seismic velocity modeling method. The method comprises the following steps of: 1) acquiring an original seismic shot gather record, focus wavelet information and an initial model used by inversion; 2) analyzing information acquired in the step 1), and determining basic inversion parameters and a full-waveform inversion frame from low frequency to high frequency based on a forward modeling algorithm and an optimization algorithm; 3) calculating to acquire the most appropriate forward and inversion model network for different frequencies; 4) compressing data dimensions which participate in inversion by a principal component analysis method during low-frequency inversion; 5) judging whether projection matrix dimensions corresponding to different frequencies meet the threshold value conversion standard, if the conversion standard is met, performing a next step, and if the conversion standard is not met, returning to the step 4); 6) introducing a focus encoding method, and pressing crosstalk noise by a random phase encoding method; 7) judging whether an iteration stopping condition is met, if the iteration stopping condition is met, performing a next step, and if the iteration stopping condition is not met, returning to the step 6); and 8) if the inversion of all the frequencies is not finished, returning to the step 3) until the inversion of all the frequencies is finished, acquiring the final velocity model, and outputting the velocity model.
Owner:CHINA NAT OFFSHORE OIL CORP +1

Improved parallel channel convolutional neural network training method

InactiveCN107092960AGuaranteed liquidityOvercoming the difficulty of gradient instabilityNeural architecturesNeural learning methodsAlgorithmEngineering
The invention relates to an improved parallel channel convolutional neural network training method. The improved parallel channel convolutional neural network training method comprises steps that characteristic extraction of data of the convolutional neural network is carried out through utilizing direct connection and convolutional channels to acquire characteristic matrixes; the characteristic matrixes are merged, and data dimension reduction is further carried out; the convolutional neural network is trained, and a loss value of network training at present is calculated; error items and a weight gradient of each layer are calculated; whether the network is in a convergence state is determined according to the loss value, if not, an initialization parameter of the convolutional neural network is adjusted according to the weight gradient, and re-training is further carried out; if yes, the network training result is outputted. The method is advantaged in that data circulation in the network can be guaranteed through introducing the direct connection channel, a problem of gradient instability during deep convolutional neural network training is solved, and deeper networks can be trained; through maximum pooling and mean value pooling, characteristic matrix dimensions of two times of characteristic extraction can be made to be consistent, and advantages of two pooling methods are integrated.
Owner:CIVIL AVIATION UNIV OF CHINA

Effective micro-expression automatic identification method

InactiveCN103440509AReduce the impact on recognition performanceImprove robustnessCharacter and pattern recognitionAlgorithmComputer performance
The invention discloses an effective micro-expression automatic identification method which comprises the steps of micro-expression frame sequence preprocessing, micro-expression information data study and micro-expression identification. The method for micro-expression frame sequence preprocessing comprises the steps that frames of obtained micro-expression sequences are detected, data of an image of each frame are extracted so that graying processing can be conducted on the data, and all the micro-expression sequences are interpolated into the frame of the unified number through the linear interpolation method. The method for micro-expression information data study comprises the steps that the micro-expression sequences obtained in the preprocessing stage are written in a tensor mode, then, the intra-class distance of the same class of micro-expressions is minimized in a tensor space through the discriminating analysis method of tensor expression and the between-class distance of different classes of micro-expressions is maximized, so that data dimension reduction is achieved, and characteristic data are ranked in a vectorized mode according to a class discriminating capacity descending order. A nearest neighbor classifier is used for micro-expression identification. Compared with the methods of MPCA, GTDA, DTSA and the like, the effective micro-expression automatic identification method has the advantages of being high in rate of identification, low in computer performance requirement and easy to achieve.
Owner:SHANDONG UNIV

Hyperspectral remote sensing classification method based on support vector machine under particle optimization

The invention discloses a hyperspectral remote sensing classification method based on support vector machine under particle optimization. High-efficiency high-accuracy classification of hyperspectral data which are high in data dimension and large in data volume can not be met by existing methods, and no ideal selection method is provided for parameters of a support vector machine method. According to the method, hyperspectral data is preprocessed, abnormal wave bands are removed under the influence of factors such as atmospheric absorption, then a certain proportion of data of various types are selected at random to serve as training data, a Gauss radical basis function is selected to serve as a kernel function mode, a classifier based on the support vector machine is trained, a speed updating formula of changing weight is designed, a certain proportion of particle mutation is guaranteed, an optimal classifier parameter is selected and obtained according to a particle swarm optimization algorithm, a plurality of second classifiers are trained, and a type which wins most votes is selected to be a final predicted type of data points according to a voting mode. According to the method, parameter optimization convergence ability of the classifier is strengthened, and the classification performance of hyperspectral remote sensing images is improved.
Owner:HANGZHOU DIANZI UNIV

Fault diagnosis method and device of power transformer

The invention discloses a fault diagnosis method and a fault diagnosis device of a power transformer. The method comprises the following steps: establishing a state characteristic data table based on an in-oil dissolved gas sample with a definite fault type; carrying out normalized treatment on the state characteristic data table and establishing a normalized fault table; calculating based on the normalized fault table to obtain various fault type clustering centers; based on the clustering centers, establishing a state standard spectrum matrix; calculating through an improved main component analysis method to obtain a characteristic value, a characteristic vector and a main component contribution rate; setting a threshold value and correspondingly selecting a main component; and calculating an Euler distance between a sample to be detected and the main component of a state characteristic sample main component and taking a state characteristic sample corresponding to a minimum distance value as a diagnosis result. The fault diagnosis method and device of the power transformer have the following advantages that a state standard spectrum is calculated by utilizing fuzzy clustering, and subject data removal and sample quantity restriction are avoided; meanwhile, the dimension of the data can be reduced and main characteristics for representing fault types are refined; and the accuracy of latent fault diagnosis in the power transformer is effectively improved.
Owner:GUANGZHOU POWER SUPPLY CO LTD +1

Power distribution network visual platform construction method based on SG-CIM

The invention discloses a power distribution network visual platform construction method based on an SG-CIM. The method includes the steps that the SG-CIM is adopted as an information model for information interaction of a power distribution network, and an interaction standard is determined; then a visual platform provided with a three-layer structure including a data source layer, a platform supporting layer and an application development layer is built. The data source layer provides original data of the power distribution network, data objects of a system are classified according to master data dimensions, the data are packaged according to the uniform data model interface standard of the SG-CIM, and the data are pushed to the platform supporting layer. The platform supporting layer comprises a sharing fusion platform, a mobile operating platform and a GIS platform, the sharing fusion platform provides data aggregates, analyzes and extracts aggregate objects and provides corresponding sharing service, the GIS platform carries out data construction and provides external service, and the mobile operating platform provides mobile operating service. The application development layer is used for developing high-grade applications. According to the method, by extending the SG-CIM and determining the uniform interaction standard based on IEC61970/968, visual management on the power distribution network is achieved, and the management capacity of the power distribution network is achieved.
Owner:NANJING INST OF TECH

Method and apparatus for mining massive intelligent power consumption data based on cloud computing

ActiveCN105005570ARealize electricity forecastRealize optimal energy use strategy formulationData processing applicationsEnergy efficient computingDecompositionDistributed File System
The present invention discloses a method and apparatus for mining massive intelligent power consumption data based on cloud computing. The method comprises the following steps of: storing massive power consumption data generated by a peripheral system in a distributed file system; a user actively initiating a service request, and a master node receiving the request and analyzing the service request, selecting slave nodes required to participate in mining and a mining algorithm according to an actual situation, and assigning tasks to the slave nodes after decomposition of dimension; and each slave node according to the assigned task, performing data storage and task execution, using the data mining algorithm selected by master node to perform a power consumption data mining task independently, and interacting with task management. The apparatus comprises a data management module, a task management module, a task execution module, a data storage module, a mining model library module and a data dimension model module. According to the method and apparatus for mining massive intelligent power consumption data based on cloud computing, power consumption information of massive users is efficiently mined, and forecast of power consumption of domestic consumers is achieved, so as to develop an optimal power consumption strategy.
Owner:STATE GRID CORP OF CHINA +1
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