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中文摘要：
基于一个多重非各向同性的散布过程的明确的表达，一典型来源时间被介绍在来源定义精力密度的起始的推动宽度。起始的紧张的分析表情光谱一个震波的密度被合并到震波精力的不可分的方程密度。并且，草地功能的一个递归的公式被导出获得草地工作的更高的顺序，它被包括描述更强壮的非各向同性的散布进程。然后，精力密度信封上的散布模式的效果被修改散布理论调查。重要差别用不同散布模式与距离在精力密度信封的腐烂被发现。信封由向前统治的散布模式综合了比各向同性、向后的统治散布模式获得的结果大。不同散布模式也被用来从 2008 Wenchuan 地震的余震适合观察数据。信封由前面的散布模式综合了，这被结束能比各向同性、向后的统治散布案例，和新解释更好匹配数据结尾，波浪被给。用向前统治的散布模式，最后，观察数据拓宽的信封被复制。
英文摘要：
Based on the formulation of a multiple non-isotropic scattering process, a characteristic source time is introduced to define the initial impulse width of energy density at the source. An analytical expression of the initial intensity spectral density of a seismic wave is incorporated into the integral equation of seismic wave energy density. And, a recursive formula of Green＇s function is derived to obtain the higher order Green＇s function, which is included to describe the stronger non-isotropic scattering process. Then, the effect of the scattering pattern on the energy density envelope is investigated by the modified scattering theory. Significant differences arc found in the decay of the energy density envelopes with distances using different scattering patterns. The envelope synthesized by the forward dominated scattering pattern is larger than the results obtained by the isotropic and backward dominated scattering pattern. Different scattering patterns are also used to fit the observation data from the aftershocks of the 2008 Wenchuan earthquake. It is concluded that the envelopes synthesized by the forward scattering pattern can match the data better than the isotropic and backward dominated scattering cases, and a new interpretation of the coda wave is given. Finally, using the forward dominated scattering pattern, the envelope broadening of the observed data is reproduced.
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