【摘要】 概述了远震P波衰减因子的测量方法,并将作者在走时层析成像研究中提出的方法推广到三维Q值图像重建中,并认为,与走时层析成像相比,有其特殊的困难,主要表现在δt^* 的测量值具有较大的误差,且各接收台站的δt 的测量精度也会明显不同.此外,理论误差可能也比较大.为此,有必要采用具有抗数据失常能力的"健全"方法,并建议使用l₁范数极小化反演的有效数值方案.更多还原

【Abstract】 In this paper we summarized the measurement method about the attenuation factor of teleseismic P wave, and the seismic tomographic method about the travel time is popularized to the reconstruction of 3\|D Q images. Comparing with the travel time tomography, there is a specific difficulty in the Q tomography. The main expression is the larger error in δt* measurement values and the deferent measurement precision in various received stations. Moreover theoretic error can be larger. Therefore it is necessary that we use a "wholesome" method with ability of anti\|data out of gear, and make suggestions to use the numerical inverse method of l1 norm minimization. 更多还原