A cepstral F statistic for detecting delay-fired seismic signals
A cepstral F statistic for detecting delay-fired seismic signals
复制标题
用于检测延迟发射地震信号的倒谱 F 统计量
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
Z. Der
中科院分区：
文献类型：
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作者：
R. Shumway;D. Baumgardt;Z. Der
时间和频域的方法来检测一致模式的反射地震记录的集合发展。这种模式是矿爆的特征，而不是核爆炸或地震的特征，因此检测波纹延迟结构可以作为鉴别的一个组成部分。在频域方法中，使用倒谱分析的推广来导出用于检测阵列上观察到的延迟触发事件的F统计量。去趋势对数谱被认为是平稳过程的实现，其周期成分是频率，周期与延迟时间差成正比。导出了一个F统计量，它与叠置或求和倒谱和叠置对数谱的谱成正比。倒谱F统计量的优点来自于更好的分辨率和延迟峰可以建立统计显著性的事实。它也很容易并入自动检测系统。频域应用…
Time- and frequency-domain approaches to detecting a consistent pattern of reflections on an ensemble of seismic recordings are developed. Such patterns are characteristic of mining bursts and not of nuclear explosions or earthquakes so that detecting a ripple delay structure can serve as one component for discrimination. In the frequency-domain approach, a generalization of cepstral analysis is used to derive an F statistic for detecting delay-fired events observed on an array. Detrended log-spectra are considered as realizations of stationary processes whose periodic components are frequencies, with periods proportional to delay-time differences. An F statistic is derived that is proportional to the stacked or summed cepstra and the spectrum of the stacked log-spectra. Advantages of the cepstral F statistic accrue from better resolution and the fact that statistical significance can be established for delay peaks. It is also easily incorporated into automatic detection systems. The frequency-domain appr...