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对logistic耦合映像的最大Lyapunov指数研究发现: 在混沌区参数内在系统尺度足够大而 耦合强度具有较大值时系统的最大Lyapunov指数存在一个不随尺度和耦合强度变化的平台 .该平台的物理意义也得以解释.Based on the investigation of the largest Lyapunov exponent of coupled map latti ce systems it is found that in the parameter region of chaos if the system is large enough and the coupling coefficient is neither too small nor too large th e largest Lyapunov exponent of the system has a plateau which does not vary wit h the size and the coupling coefficient. The physical meaning of this flat pla teau is discussed.
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