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The theory of acousto-optic interaction for the SAW field with metal strip reflective arrays(MSRA)onthe piezoelectric substrate is presented.The original optical probe system is improved to detect and displaythe SAW distribution in the pulse compressor with MSRA deposited on the surface of YZ-LiNbO_3,and theresults are analysed and discussed briefly. 相似文献
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Determining the input dimension of a neural network for nonlinear time series prediction 总被引:6,自引:0,他引:6
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Determining the input dimension of a feed-forward neural network for nonlinear time series prediction plays an important role in the modelling.The paper first summarizes the current methods for determining the input dimension of the neural network.Then inspired by the fact that the correlation dimension of a nonlinear dynamic system is the most important feature of it ,the paper pressents a new idea that the input dimension of the neural network for nonlinear time series prediction can be taken as an integer just greater than or equal to the correlation dimension.Fimally,some validation examples and results are given. 相似文献
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