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Tracking tests for different polymer materials were carried out to investigate the chaotic behavior of surface discharge.The discharge sequences measured during the discharge process were analyzed for finding the evidence of chaos existence.Four kinds of nonlinear analysis methods were adopted:estimating the largest Lyapunov exponent,calculating the fractal dimension with increasing the embedding dimension,drawing the recurrence plots,and plotting the Poincare maps.It is found that the largest Lyapunov exponent of the discharge is positive,and the plot of fractal dimension,as a function of embedding dimension,will saturate at a value.The recurrence plots show the chaotic frame-work patterns,and the Poincare maps also have the chaotic characteristics.The results indicate that the chaotic behavior does exist in the discharge currents of the tracking test. 相似文献
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本文论述了科际联系在地理课堂教学中的应用,把科际联系定义为地理课堂教学中各学科之间知识、技能、方法与观念等方面的相互迁移与融会贯通。通过理论依据和实际应用,阐述了科际联系在地理教学中的应用。 相似文献
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