演算法

In the inversion of re- flection coefficient, t...

迭代反演反射系数时，对于过渡矩阵没有对称正定的限制，从而改善了算法的稳定性，同时减少计算量。

This paper uses Tikhonov regulation method to solve the first kind Fredholm integral equation which gets the solution of the inverse problem in time,and based on the advantage of the genetic algorithms presents a ex- ample of inverse problem.

利用Tikhonov 正则化方法解第一类Fredholm积分方程获得该逆时反问题的解，并结合遗传算法的优点给出了一种反演的例子。

Genetic algorithm is one of the most effective methods to solve the inverse problem.

而遗传算法是解反演问题的有效方法之一。

This paper provides a process: according to the experimental data from the groundsill load experiment, we can identify the parameter of the loess nonlinear model by using the genetic algorithm before construct the building. By the parameter we can forecast the groundsill distortion.

本论文所作的工作提供了这样一种思路，依据建筑物建造之前，从地基土载荷试验中获取的试验数据，通过由遗传算法所建立的黄土非线性本构模型参数反演的方法，可以进行黄土非线性本构模型参数的优化识别。

This paper briefly introduces the homotopy theory and algorithm of tracking zero curves. At the same time, the paper gives the example of the impedance inversion in the seismic exploration. In the end, the advantages and disadvantages of the homotopy method are pointed out in this paper.

本讲座概要地介绍了同伦方法的基本原理，跟踪同伦曲线的具体算法，并给出了同伦方法在地展勘探波阻抗反演中的应用实例，最后归纳总结了同伦方法的特点及目前存在的不足。

And it can be regarded as a helpful attempt to improve the physical algorithm applied in China with which the rainfall intensity and hydrometeor structures can be retrieved from brightness temperature.

综上，研究所确立的物理算法是成功的，可作为发展适用于我国的由微波亮温反演地面雨强和水凝物廓线的物理方法一次有益尝试。

In the ***, all types and fundamental principles of Radon transform are summarized systematacially. This *** starts from the general linear Radon transform, and then researches how to use the damped least square method to find the solution of the forward transform. However, the least squares smoothing effect will lead to a certain degree of trails in the data of Radon domain, which led to the application\'s limitations. After that the implementation in Radon domain and relative merits of linear Radon transform, parabolic Radon transform and polynomial Radon transform which have time invariance are introduced, the conjugate gradient method that can solve numerical solution is also given. And then the high resolution Randon transform is discussed, it introduces the regularization theory and Bayes principle into inversion, which successfully remove the negative affect caused by discrete Radon transform. Finally, we introduce the optimal weighting similar coefficient Radon transform, which adapt to the time variant quality of hyperbolic Radon transform.

本文系统总结了Radon变换的各种类型及其基本原理，从τ- p变换(即一般线性Radon变换)出发，研究利用阻尼最小二乘平方法求解其正变换，但是最小平方法的平滑作用会导致Radon域数据存在一定程度的拖尾效应，给这种方法的应用带来了很大的局限性；然后先容了具有时不变性的线性、抛物和多项式Radon变换在频率域的实现及其优缺点，给出了求解其数值解的共轭梯度算法；接着讨论了高分辨率Radon变换，它把正则化思想和贝叶斯原理引进到了反演中，很好的克服了离散Radon变换产生的截断效应对结果的不利影响；最后先容了适应双曲Radon变换时变性质的高分辨率最优相似系数加权Radon变换。

In Chapter 2,we improve the Differential Evolution algorithm developed rapidly in recent years,and apply it to study the multi-exponential inversion problem in nuclear magnetic resonance.

第二章改进了近年发展起来的差分进化算法，研究核磁共振T_2谱多指数反演问题。

We also use this inversion algorithm to invert some real data.

同时，我们用该算法对一些实测大地电磁数据进行了反演。

Based on a relationship between the RF and Jacobi matrix, a novel method which is independent of the forward modeling for a fast algorithm of Jacobi matrix employing the RF was advanced.

通过建立二维非均质反演Jacobi矩阵与响应函数的关系，开辟了Jacobi矩阵快速算法构造的有效途径。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。