The thesis based on random fractal theory, utilizing fractional Brownian motion model, using R/S analysis technique and wavelet transform method to estimate Hurst exponent which dep.

基于随机分形理论，采用分数布朗运动模型，应用R/S分析技术和基于小波变换的谱参数估计方法计算地震道信号的赫斯特指数。

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It "does not provide blanket immunity for the act of hydraulic fracturing, and any assertion to the contrary would be false, " John Stefanko, deputy DEP secretary, wrote to Kasunic and another of the legislation's co-sponsors, Republican Sen.

WSJ: Pa. pushes drillers to frack with coal mine water