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我们在周期外力作用下的布鲁塞尔振子中发现了从准周期行为到混沌态的过渡。这样,强迫布鲁塞尔振子成为数值实验中第一个同时看到各种通向混沌的道路并存的模型,而这是与某些流体力学实验一致的。原来光滑的周期采样图在局部起皱折迭,同时准周期的功率谱中出现越来越多的噪声背景,这种过渡方式与人们在圆周映象中讨论的准周期轨道全局失去光滑性成为对比,可能在非线性微分方程所描述的系统中更具有代表性。We have observed transitions from quasiperiodic regime to chaos in the periodically forced Brusselator. It takes place via kinking and folding of the originally smooth Poincare map which may be more generic as compared to the transition in circle mapping, where the quasiperiodic orbit looses smoothness globally. Now all the well-known "routes" to chaos have been shown to coexist in this mathematical model in different part of the parameter space. This is in agreement with experimental observations in some hydrodynamical systems where different routes to turbulence have been found in one and the same system under slightly different conditions.
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