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120 results about "Real time learning" patented technology

Real-time learning debutanizer soft measurement modeling method on basis of Gaussian mixture models

The invention discloses a real-time learning debutanizer soft measurement modeling method on the basis of Gaussian mixture models (GMM). The real-time learning debutanizer soft measurement modeling method includes training process Gaussian mixture models to acquire various Gaussian component parameters and building corresponding sub-models; computing posterior probabilities of to-be-predicted samples and local Mahalanobis distances of various Gaussian components by a Bayesian process so as to obtain weighted sample similarity definition indexes; reasonably selecting similar samples by the aid of the new similarity indexes for local modeling. The posterior probabilities indicate whether the to-be-predicted samples belong to the various Gaussian components or not. The real-time learning debutanizer soft measurement modeling method has the advantages that problems of process non-Gaussianity and nonlinearity can be effectively solved, characteristics of the to-be-predicted samples can be sufficiently extracted, the similar samples can be reasonably selected for real-time learning modeling, and accordingly the real-time learning debutanizer soft measurement modeling method is favorable for improving the model prediction precision.
Owner:ZHEJIANG UNIV

Self-learning wheel chair control method based on change of gravity center of human body

The invention discloses a self-learning wheel chair control method based on change of a gravity center of a human body, and belongs to the field of pattern recognition and intelligent systems. According to the self-learning wheel chair control method, a pressure sensor is installed between a wheel chair seat and a framework so as to collect force distribution under a sitting position of the human body, two-dimensional areal coordinates are calculated, and real-time data of the center of the gravity are stored in an embedded type computer; and algorithm optimization is conducted to the number of neurons in an output layer, network initial weight value, a network neighborhood radius adjusting rule and the like according to a basic learning process of a normal self-organizing feature map (SOFM) algorithm, and therefore operating complexity is reduced, calculating instantaneity of the algorithm in application is improved, and the purpose that algorithms are controlled to be different according to difference of people is achieved. By utilizing the improved SOFM algorithm, and in the process of driving habit learning, rate of convergence of an SOFM clustering algorithm and learning efficiency are greatly improved, instantaneity of the algorithm and accuracy of cluster are improved, the requirement of wheel chair real-time learning and controlling is met, and the problem that manual parameter adjustment is fussy due to difference of driving habits of users is solved.
Owner:BEIJING UNIV OF TECH

Method for real-time monitoring of numerical control machining states of complicated structural components based on machining features

The invention discloses a method for real-time monitoring of numerical control machining states of complicated structural components based on machining features. The method is characterized in that monitoring threshold values indicating whether the machining states are normal or not are established based on the machining features, and monitoring of the numerical control machining states is achieved according to the machining features; typical machining feature monitoring signals and a threshold value library are established through a cutting experiment, machining feature monitoring identifiers and machining feature monitoring threshold values in the matched threshold value library are added for numerical control machining programs before numerical control machining and serve as the basis for state monitoring in the machining process; for the machining features which do not exist in the threshold value library, machining feature samples are established in numerical control machining through real-time learning, and monitoring signals of new machining features arisen for the first time during machining serve as the basis for follow-up same-type machining feature state monitoring. The method can be not only suitable for monitoring of numerical control machining states during large-scale part production, can be also suitable for numerical control machining states during small-scale or even single part production and is wide in application range.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Real-time learning condition analysis system matching classroom knowledge content and real-time learning condition analysis method thereof

The invention relates to the technical field of information and education, and relates to a real-time learning condition analysis system matching the classroom knowledge content and a real-time learning condition analysis method thereof. The real-time learning condition analysis system comprises a knowledge map generation module, a real-time learning condition data generation module and an analysis and comparison module. The knowledge map generation module generates an actual knowledge map according to the actual classroom teaching content. The real-time learning condition data generation module is used for performing algorithm analysis on the learning concentration situation of the onsite learning personnel so as to generate a concentration distribution diagram. The analysis and comparison module is connected with the knowledge map generation module and the real-time learning condition data generation module and establishes the correlation analysis view of the actual knowledge map andthe concentration distribution diagram with the time acting as the index so as to form the classroom knowledge content concentration distribution result. According to the real-time learning conditionanalysis system matching the classroom knowledge content and the real-time learning condition analysis method thereof, the knowledge map of the teaching content knowledge points is formed, and the knowledge points and concentration analysis are correlated with the time value acting as the index so as to form the classroom knowledge content concentration distribution result.
Owner:广州思涵信息科技有限公司

An integrated real-time learning industrial process soft measurement modeling method based on multi-objective optimization

The invention discloses an integrated real-time learning industrial process soft measurement modeling method based on multi-objective optimization, and belongs to the field of industrial process softmeasurement modeling. The invention aims to solve the common problems of redundancy and process nonlinearity of industrial data. An evolutionary multi-objective optimization method is adopted to optimize input variables and model structures in a historical sample database, variables irrelevant to quality variables or weakly relevant to the quality variables are removed, the sample quality of the database is improved, and meanwhile, the relation between the model complexity and the prediction precision is effectively balanced. Besides, a part of samples similar to the query samples are selectedfrom the optimized historical sample library to construct a local extreme learning machine model, and a selective integration strategy is adopted to integrate the Pareto optimal solution obtained through multi-objective optimization, so that the nonlinear problem of the industrial process can be effectively solved. By optimizing the modeling data structure and the extreme learning machine model structure, the prediction precision and the calculation efficiency of industrial process soft measurement modeling are improved.
Owner:KUNMING UNIV OF SCI & TECH
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