PGA, 相位梯度自聚焦算法

在气体动力学中，黎曼问题是一个具有初始条件的问题。

以源代码和二进制形式重新分发和使用，有或没有；

OFELI is an object oriented library of C++ classes for development of finite element codes. Its main features are : * Various storage schemes of matrices (dense, sparse, skyline). * Direct methods of solution of linear systems of equations as well as various combinations of iterative solvers and preconditioners. * Shape functions of most "popular" finite elements * Element arrays of most popular problems (Heat Transfer, Fluid Flow, Solid Mechanics, Electromagnetics, ...).-OFELI is an object oriented library of C++ classes for development of finite element codes. Its main features are :* Various storage schemes of matrices (dense, sparse, skyline).* Direct methods of solution of linear systems of equations as well as various combinations of iterative solvers and preconditioners.* Shape functions of most "popular" finite elements* Element arrays of most popular problems (Heat Transfer, Fluid Flow, Solid Mechanics, Electromagnetics, ...).

马踏棋盘问题：国际象棋中的马，怎样才能不重复的跳遍棋盘上的每一格呢？ 笔者见过许多解决这类问题的程序，这个是最简洁同时也是速度最快的一个。-horse riding chessboard : the international chess Ma, how can we not repeat the jump all over the chessboard of each? I met many issues to resolve such procedures, this is the most succinct is also the fastest one.

一个基于主元分析的故障诊断的程序，是一个数值仿真实验

克鲁斯卡 （Clsk） 求最小生成树-unmarked (Clsk) for the minimum spanning tree

应用背景 该问题是这样描述的：找n个数中的前k个最小数，要求时间复杂度和空间复杂度尽可能低。（n可能很大） 据说这是一些知名公司的面试题目。题目看起来简单，就区区二十来字，但是要求却不低。这里面蕴含的算法思想在金融等领域的软件中都有应用。在此分享，希望能给同仁们一些参考。 关键技术本实例中主要是通过堆排序来实现的，堆排序算法的实现中的难点在于对堆的调整，无论是最大堆还是最小堆，在具体应用中都会维持着一种动而不乱的结构。这里面还用到桶排序的思想，其实它也是建立在堆排序基础上的。C语言实现的代码看起来简洁明了。

该程序用C语言实现了彩色字符的输出，最终以搭建积木小屋的形式展现了彩色字符定时定位输出的效果。小屋全部搭建完毕后，经一分钟程序自动结束。本程序适合喜欢用C语言的基础知识搞小创意的人看。

是《计算机常用数值计算算法与程序 C++版》一书的配套C++程序源代码文件，每个源程序文件的文件扩展名都使用.cpp形式。这些C++程序已经在微软公司Windows 平台下的Virsual C++ 6.0环境下通过-is "commonly used computer numerical algorithms and procedures C version," a book supporting the C source code file, the source files extensions are used. Cpp form. These procedures have been in C Microsoft Windows platform under the Virsual C 6.0 environment through

2009 ACM World Final Problem Set