利用计算机测定近震时空参数的记忆梯度法

MEMORY GRADIENT METHOD FOR DETERMINING NEAR EARTHQUAKE TIME AND SPACE PARAMETERS WITH COMPUTER

基于无约束最优化问题的记忆梯度法,本文设计了测定近震时空参数的计算机程序。仅需三个台站的记录资料即可利用本程序进行测定,记录中的主要震相((?)、(?)、P_n、S_n)均可参与测定运算。本程序对台网内外近震的参数测定均适用,对远离台网的地震,其测定结果的精度不低于交切法。

In this paper, a computer program for determining near earthquake time and space parameters is designed, on the basis of memory gradient method for unconstrained optimization. As long as the computer gets the recorded data from more than three stations, it can run. The recorded major phases((?), (?), P_n, S_n) all can be used in the program. The program is applicable to determine the parameters of near earthquake in or out of the network of stations. Even if the earthquake is far from the network, the precision of the results determined with this program is not lower than that with the method of intersection.