重力时序变化系统稳定性的研究

摘要

We regard gravity time sequence system as slow time-varying system and use difference equations for describing its equivalent parameter model based on the theory of linear systems analysis. By judging the stability of parametric sequence,we are going to explore the precursors. On the basis of gravity time-varying series from 1994 to 2009 of three observation points in Hexi gravity survey network, we prove that this method is effective, but more research are required to confirm the relations between unstability and seismic precursor anomalies.%把重力时序系统视为慢时变系统,根据线性系统分析的理论方法,用差分方程描述该系统的等价参数模型,通过判断参数序列的稳定性来探索前兆异常.对河西流动重力观测网1994-2009年3个测点的观测数据的计算分析验证了该方法的有效性,但失稳与地震前兆的关系还需进一步研究.