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本文提出了在数字地震勘探技术使用的一种借助于首层折射滑行波特性,来提取表层厚度、速度信息的方法。本文中介绍了该提取方法得出的过程,使用的物理模型及假设,数学原理及近似解法等。本文企盼的是,这个得出过程的启迪示范作用。 相似文献
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For the localization of electronic states of one-dimensional quasilattices, two kinds of methods extensively used (KKT renormalization-group method and numerical simulation methods) have given contradictory, results. In this paper, an approach based on the transfer matrix method is adopted to deal with this problem in general. We confirm that the above two methods describe the ideal infinite quasilattices in different asymptotical ways. so different results are obtained. We also study analytically the localization of the zero-energy electronic states of the one-dimensional quasilattices, and provide some new results different from that of the previous work. 相似文献
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We have studied a new class of one-dimensional quasiperiodic lattices, for which the substitution rules are B→BA, and A→BAB. The Kohmoto-Kadenoff-Tang (KKT) renormalization group method has been used to study the asymptotical behavior of the spectrum. It is found that the energy spectra are Cantor-like but have different salf-similarity from that of Fibonacci lattice. By use of several different criteria, three kinds of wave function behavior (extended, localized, and intermediate states) are clearly observed. 相似文献
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用最小平方距离法对泥石流地貌要素之初探 总被引:1,自引:0,他引:1
藉助MATLAB工具 ,对泥石流沟的六个地貌要素之沟床比降与切割度、流域面积与主沟长 ,用最小平方距离法进行了初步处理分析的探讨 :建立了线性相关的回归方程 ,并与用最小二乘法得到的线性回归方程进行比较 ,一些参数的估计值得到了改善 相似文献