Ricker子波视主频的变化对混沌振子检测效果的影响  

Influence of the variety of the apparent dominant frequency of Ricker wavelets on the detection effects of chaotic oscillator

作　　者：袁野[1] 罗正玮[1] 李月[1] 

机构地区：[1]吉林大学通信工程学院,长春130012

出　　处：《地球物理学进展》2006年第1期70-73,共4页Progress in Geophysics

基　　金：国家自然科学基金面上项目(40374045);吉林省科技厅发展项目(20050526)资助

摘　　要：针对地震勘探资料中存在加性强随机噪声干扰,已经提出用混沌振子系统处理的方法技术.为完善该方法,需要研究诸如地震勘探同相轴完整程度、组成同相轴的地震子波变化等对系统检测效果的影响.本文以Ricker子波模拟地震子波,研究Ricker子波视主频变化的相应检测效果.研究结果:随着Ricker子波视主频的升高,检测SNR逐渐变差,在高频部分SNR的变化明显比低频部分缓慢;在通常地震勘探频率范围内,混沌振子系统检测SNR有可能部分补偿由于地震波传播引起的幅度降低;为检测由畸变子波构成的同相轴提供一定的可能.For the seismic prospecting data with additive noise, it has been put up to deal with the data using the chaotic oscillator system. It is needed to study the influence on the detection effects, which is aroused by such as the level of integrity of the seismic prospecting event, the variety of the apparent dominant frequency of the Ricker wavelet. The findings： with the apparent dominant frequency of the Ricker wavelet rising, the detection SNR will get worse gradually, it is obvious that the variety of the SNR is slower during the portion of high frequency than during the portion of low frequency; in the usual range of seismic prospecting frequency, the SNR of the chaotic oscillator detection system could partially make up the amplitude attenuation aroused by the transmit of the seismic wave;the results could provide help for detecting the event constituted by aberrant wavelets.

关 键 词：混沌振子系统 Rieker子波 视主频 信噪比(SNR) 地震勘探同相轴 

分 类 号：P631[天文地球—地质矿产勘探]