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59 results about "Time series processing" patented technology

Audio and video mutual retrieval method based on user click behaviors

The invention discloses an audio and video mutual retrieval method based on user click behaviors. The method comprises the following steps: preprocessing input audio and video data; Sending the preprocessed audio data into a deep convolutional neural network to obtain an audio representation vector and attention weight distribution; Sending the preprocessed video key frame into a deep convolutional neural network to obtain a key frame representation vector, and sequentially sending the key frame representation vector into a time sequence processing network based on an attention mechanism to obtain a representation vector of the video and attention weight distribution; Calculating the similarity of the audio and video representation vectors and sorting the audio and video according to the similarity; performing Annotating according to the attention weight distribution to provide explainable basis for sorting; Calculating the loss function through a user click behavior, and carrying outmodel training by adopting a backward propagation method; And carrying out retrieval matching on audios and videos in the media library based on the trained model. According to the method and the device, matched audios and videos in the media library can be retrieved under the condition of giving videos and audios.
Owner:SOUTH CHINA UNIV OF TECH

Multi-source data and time sequence processing method and device for construction of industry knowledge graph

PendingCN110990585ASolve the difficult problem of processing time series dataGuaranteed accuracyDatabase management systemsRelational databasesTable (database)Theoretical computer science
The invention discloses a multi-source data and time sequence processing method and device for construction of an industry knowledge graph. The method comprises the following steps: constructing an ontology layer of the knowledge graph, wherein the ontology layer comprises ontologies, ontology attributes and an ontology relation; extracting entities and entity attributes from multiple data sources, and conducting inconsistency check on the entities; conducting inconsistency check on the entity attributes of all the entities, wherein an entity relationship between the entities inherits the ontology relationship between the ontologies corresponding to the entities; and establishing indexes of a knowledge graph database and a time sequence database. The method has the advantages that throughthe uniqueness of a standard naming table and the relational database, entity conflict resolution accuracy is ensured to the greatest extent; by utilizing the advantage that the knowledge graph has the ontology layer, accurate classification of the entity attributes is realized by establishing similar labels, and fusion efficiency is effectively improved; and the problem that the knowledge graph is difficult to process time sequence data is solved by establishing indexes between knowledge graph database ontologies and a time sequence database form.
Owner:SHANGHAI GEOTECHN INVESTIGATIONS & DESIGN INST

Method for determining undetermined frequent pattern in undetermined time sequence

ActiveCN102867118AImprove computing efficiencyPrecise determination of indeterminate frequent patternsSpecial data processing applicationsPattern recognitionState space
The invention provides a method for determining an undetermined frequent pattern in an undetermined time sequence, belonging to the field of time sequence processing. The method comprises the following steps of: S1, selecting the type of the undetermined frequent pattern and setting a time threshold value and a probability threshold value eta, wherein the type of the undetermined frequent pattern comprises a minimal occurrence pattern and a non-overlapping occurrence pattern; S2, calculating effective examples of each candidate pattern in the undetermined time sequence according to the type of the undetermined frequent pattern, and determining the type of each candidate pattern to be a first candidate pattern or a second candidate pattern; S3, judging whether the first candidate pattern is the undetermined frequent pattern by using a dynamic programming technology; and S4, judging whether the second candidate pattern is the undetermined frequent pattern by combining a state space compression coding technology and a fuzzy programming technology. According to the method disclosed by the invention, the undetermined frequent pattern in the undetermined time sequence can be accurately determined; and moreover, the calculation efficiency is improved by using the state space compression coding technology.
Owner:CHONGQING HANGUANG ELECTRONICS ENG

Method and device for optimizing control parameters in clinker firing system

The invention discloses a method and device for optimizing control parameters in a clinker firing system. The method comprises the steps of converting historical sample time series data into a historical parameter recommendation sample set according to a preset time series processing strategy, wherein each parameter in the historical parameter recommendation sample set is obtained by aggregating according to a production time sequence based on a mechanism characteristic and a lag period of a process link to which the parameter belongs; determining an alternative parameter recommendation sampleset based on the real-time parameter set and the historical parameter recommendation sample set of the clinker generation system; and transmitting each alternative recommendation sample in the alternative parameter recommendation sample set to a preset multi-target parameter optimization function for calculation, determining a target parameter recommendation sample based on a calculation result,and taking a target control parameter in the target parameter recommendation sample as a control parameter of the clinker firing system. According to the process, the parameters in the alternative parameter recommendation sample set take the lag period into consideration, time lag of associated data before and after is avoided, and the accuracy of target control parameter determination is guaranteed.
Owner:蓝卓数字科技有限公司

Time series unsupervised anomaly detection method based on conditional regularization flow model

The invention discloses a time series unsupervised anomaly detection method based on a conditional regularization flow model. The time series unsupervised anomaly detection method comprises the following steps of: (1) preprocessing a time series, and constructing a training data set; (2) constructing a recurrent neural network for processing a historical time series into implicit representation; (3) constructing the conditional regularization flow model for modeling probability density of an observation window by taking a historical observation series as a condition, wherein the conditional regularization flow model is used for calculating conditional logarithm likelihood of a time series in the observation window; (4) learning optimization model parameters based on a maximum likelihood principle; (5) selecting a threshold value according to the conditional logarithm likelihood of all the samples under the conditional regularization flow model with determined parameters; (6) and calculating the conditional logarithm likelihood of the time series in the observation window on line by using the recurrent neural network and the conditional regularization flow model with the determinedparameters, and reporting the observation window to be abnormal when the conditional logarithm likelihood is lower than a specified threshold value. The time series unsupervised anomaly detection method can effectively reduce the false alarm rate of anomaly detection.
Owner:ZHEJIANG UNIV

Fault diagnosis method for stamping equipment and computer storage medium

The invention provides a fault diagnosis method for stamping equipment, and belongs to the technical field of fault diagnosis of heavy equipment. The method comprises the following steps: acquiring basic data, current operation data and historical fault data of a hydraulic system of the stamping equipment, and transmitting and storing the data to terminal equipment; carrying out time-series processing on the current operation data; building a deep-learning network model based on an LSTM (Long Short-Term Memory) and a RNN (Recurrent Neural Network); training a network model by adopting an improved particle swarm POS algorithm according to the basic data and the historical fault data, optimizing parameters of the network model, and acquiring an oil leakage feature set; inputting the preprocessed current operation data into the network model to extract performance state features of the hydraulic system; and inputting the performance state features into a classifier to judge whether hydraulic equipment has an oil leakage risk or not. The method can quickly and accurately forecast whether the stamping equipment has the oil leakage risk or not, guarantee safe and reliable operation of the stamping equipment and reduce the operation and maintenance cost of the stamping equipment.
Owner:HEFEI UNIV OF TECH

A method and apparatus for constructing a computational flow graph for time series processing

ActiveCN109508412AOptimizing Calculation StepsAvoid blockingOther databases indexingAlgorithmResource utilization
The invention provides a method and an apparatus for constructing a computational flow graph of time series processing, wherein, the method comprises the following steps of: acquiring a time series processing algorithm to be processed; Splitting the time series processing algorithm to be processed into a plurality of calculation expressions; Constructing a computational flow graph for the plurality of computational expressions to obtain a plurality of computational flow graphs; The plurality of computational flow diagrams are combined to obtain a flow diagram model corresponding to the time series processing algorithm to be processed. As a result of that technical solution provide by the embodiments of the present application, the data dependency of time series algorithm can be visually displayed, this dependency can be used to optimize the computational steps in the time series processing algorithm, The problem of processor congestion caused by data dependency can be avoided, and thecomputational flow diagram can be easily divided according to the characteristics of the computing system to match the computing power of the computing system, so as to improve the resource utilization rate of the computing system and the running efficiency of the time series processing algorithm.
Owner:YUSUR TECH CO LTD

Time series data processing method, device and system, server and readable storage medium

The invention discloses a time series data processing method, device and system, a server and a readable storage medium. The method comprises the following steps: receiving a plurality of pieces of to-be-processed data sent by a plurality of pieces of equipment, wherein the plurality of pieces of to-be-processed data respectively comprise time series data acquired by the plurality of pieces of equipment and identification codes of the plurality of pieces of equipment; according to grouping results of the multiple pieces of equipment, respectively importing multiple pieces of to-be-processed data into corresponding task queues respectively for sequential processing, and correspondingly obtaining multiple pieces of result data; and sequentially storing the result data into a first cache queue. According to the time series data processing method provided by the invention, based on the grouping result of the equipment, high-performance time series processing of large-batch data can be realized in parallel, and the advantages of multi-core operation are exerted. Meanwhile, a single machine can process data of tens of thousands of devices, a complex computer group is prevented from beingbuilt, and the deployment cost is remarkably reduced.
Owner:NUCTECH JIANGSU CO LTD +1
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