最大似然谱估计方法及其在磁震关系中的应用

最大似然谱估计方法及其在磁震关系中的应用曾小苹１）林云芳１）赵跃辰１）赵明１）续春荣２）于明鑫３）汪江田４）王居云５）１）中国北京１０００８１国家地震局地球物理研究所２）中国北京１０００８５国家地震局地壳应力研究所３）中国辽宁大连１１６０３３辽宁省...

中国南极长城站的地下电性结构

将Ｃａｐｏｎ谱估计法（即最大似然法）用于分析中国南极长城站１９８６年１—３月的地磁短周期事件，计算出周期Ｔ＝４５ｓ－１６０ｍｉｎ分的复数转换函数Ａ和Ｂ。由Ａ的模｜Ａ｜及其相位角推测出，在本文计算周期所对应的地下深度范围内，长城站地下电导率有二层结构，分层处对应的周期为２０—２６ｍｉｎ左右。本文还就Ｃａｐｏｎ谱估计法和快速富氏变换法的计算结果和误差作了比较，前者显示了明显的优越性。

多层地电断面视电阻率的高精度计算

目前地电的方法在我国已应用到地震预报的研究中,为了了解与地下力学场变化相联系的地电变化,需要了解台址下勘探体积内的电阻率分层情况,从而正确地认识各种影响因素对地电阻率的作用。

The subterranean electric structure at the Chinese Great Wall Station on Antarctic（CGWSA）

In this paper the Capon spectral estimation method,i.e.the maximun likelihood method,was applied to the analysis of the short periodic geomagnetic events occurred from January to March,1986 at the Chinese Great Wall Station on Antarctic(CGWSA) and the complex transfer functions A and B for Peneds T=45 s-160 min were calculated,derived from the medulus|A| of A and its phase angle,it seems that there are two structural layers in the subterranean electric conductivity under the CGWSA,the corresponding periods at the interface being around 20-26 minutes.We also compared the Capon spectral estimation method with the Fast Fourier Trasformation(FFT).The former appeared to be better than the latter.

Maximum likelihood spectrum estimation method and its application in seismo－magnet－icrelation

Ｍａｘｉｍｕｍｌｉｋｅｌｉｈｏｏｄｓｐｅｃｔｒｕｍｅｓｔｉｍａｔｉｏｎｍｅｔｈｏｄａｎｄｉｔｓａｐｐｌｉｃａｔｉｏｎｉｎｓｅｉｓｍｏ┐ｍａｇｎｅｔ┐ｉｃｒｅｌａｔｉｏｎＸＩＡＯ－ＰＩＮＧＺＥＮＧ１）（曾小苹），ＹＵＮ－ＦＡＮＧＬＩＮ１）（林云芳），...