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An Improved SPSA Algorithm for System Identification Using Fuzzy Rules for Training Neural Networks 被引量:1
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作者 Ahmad T.Abdulsadda Kamran Iqbal 《International Journal of Automation and computing》 EI 2011年第3期333-339,共7页
Simultaneous perturbation stochastic approximation (SPSA) belongs to the class of gradient-free optimization methods that extract gradient information from successive objective function evaluation. This paper descri... Simultaneous perturbation stochastic approximation (SPSA) belongs to the class of gradient-free optimization methods that extract gradient information from successive objective function evaluation. This paper describes an improved SPSA algorithm, which entails fuzzy adaptive gain sequences, gradient smoothing, and a step rejection procedure to enhance convergence and stability. The proposed fuzzy adaptive simultaneous perturbation approximation (FASPA) algorithm is particularly well suited to problems involving a large number of parameters such as those encountered in nonlinear system identification using neural networks (NNs). Accordingly, a multilayer perceptron (MLP) network with popular training algorithms was used to predicate the system response. We found that an MLP trained by FASPSA had the desired accuracy that was comparable to results obtained by traditional system identification algorithms. Simulation results for typical nonlinear systems demonstrate that the proposed NN architecture trained with FASPSA yields improved system identification as measured by reduced time of convergence and a smaller identification error. 展开更多
关键词 Nonlinear system identification simultaneous perturbation stochastic approximation (SPSA) neural networks (NNs) fuzzy rules multi-layer perceptron (MLP).
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Research on the Rules of Short Video Online Reviews in Mainstream Media
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作者 Zihua Zhan Yajuan Liu 《Proceedings of Business and Economic Studies》 2021年第2期1-4,共4页
With the continuous optimization of mobile intelligent mode,the internet has gradually entered the era of visualization.This paper briefly summarizes the reasons and current situation of the rapid development of mains... With the continuous optimization of mobile intelligent mode,the internet has gradually entered the era of visualization.This paper briefly summarizes the reasons and current situation of the rapid development of mainstream media short films,analyzes the composition and functions of mainstream media short video online reviews,and probes into the rules of mainstream media short video online reviews. 展开更多
关键词 Mainstream media Short video The rule of network comment Research on the mode
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