苏北溱潼凹陷非线性动力学特征浅析

Preliminary Analysis of Nonlinear Dynamic Characterishcs of Qintong Depression in Northern Jiangsu

混沌动力学研究提出的方法，可以从观测数据角度重建系统的演变规则．本文在扼要介绍非线性数学模型反演理论的基础上，采用时序资料重建复杂系统动力学特征的方法，求得苏北溱潼凹陷演化的非线性动力学方程，并对系统Ｌｙａｐｕｎｏｖ指数、熵及Ｌｙｓｐｕｎｏｖ维数的变化特征和溱潼凹陷演化过程的混沌特征进行了研究和初步分析，为分析盆地演化特征提供了方法．系统信息维的变化特征，反映了溱潼地区断陷阶段活动剧烈、凹陷阶段活动较弱的特点．

The evolutional regularity of systems can be reconstracted from observed data by using the method railed from the study of chaotic dynamics.Inverse theory of nonlinear mathematical model is introduced to the point in this paper,moreover,moreover,nonlinear dynamic equations of evolution of the Qintong depression are obtained from time series data.It is studied that the variational features of of Lyapunov exponents, entropy and Lyapunov information dimension,and chaotic characteristics of evolutional process of the Qintong depression are preliminarily analysed.The variational features of information dimension of system showed violent activity in fault subsidence stage and weak activity in depression stage.The methods of analyses of basin evolutional characteristics are privided moreover.