sift图像拼接代码

本代码演示了马走日棋盘搜索算法。-demonstration of the code Ma days away chessboard search algorithm.

数值计算的C语言代码，包括了大部分C语言的算法，希望对大家有用-The C-numerical code, including most of the C language algorithms, hope for all of us

国密SM4算法实现,已经验证可用，c语言实现-The country close SM4 algorithm SM4分组密码算法，原名SMS4，国家密码管理局于2012年3月21日发布，但不能下载标准文档。 本标准适用于密码应用中使用分组密码的需求。 

约瑟夫问题的一种描述是：编号为1，2，…，n的n个人按顺时针方向围坐一圈，没人持有一个密码。一开始人选一个正整数作为报数上限值m，从第一个人开始按顺时针自1开始报数，报到m是停止报数。报m的人出列，将他的密码作为新的m值，从他在顺时针方向上的下一个人开始重新从1报数，如此下去，直至所有人全部出列为止。-a description of the problem is : No. 1, 2, ..., n n clockwise direction by individuals sitting around a circle, no one holding a password. One person started as a positive integer limits on the number of reported m, from the first individuals to embark on the clockwise from a few reportedly started, the report m is reportedly stopped a few. M reported out of the list of his password as a new value m, from a clockwise direction in the next re-started from a newspaper a few, like that, until the total of all listed so far.

该代码使用c++语言在vc下分别实现了层次聚类，k均值聚类，模糊k均值，em聚类等聚类算法。对于初学数据挖掘的人有一定的借鉴作用。代码简单易懂，容易看懂。

关于约瑟夫环的两种思考方法 -Josephus on the two way of thinking

数学运算，矩阵运算的说明共式，包括求逆，行列式等-math, matrix operations-a total of the note, including inversion, as Determinant

快速查找：应用递归排序的例子- Quick look: Application recursion arrangement example

误差分析的方法有多种，这是一种先验估计误差的方法，较以往的“向前误差分析”在矩阵运算的舍入误差估计上有较好的结果，以而使矩阵的误差分析获得了突破性的进展，使不少用向前误差分析难于判定可靠性的数值方法获得新的进展。特别值得一提的是，在工程技术界，经常使用几种不同的计算方法，甚至使用实验方法进行比较，从而确定计算结果的可靠性，这也是一种有效而实用的方法。-error analysis by a number of means, which is a priori estimation error method, compared to the previous "Forward Error Analysis" in the matrix calculation error into the homes a better estimate on the results of a matrix so the error analysis of a breakthrough in the progress, many with forward error analysis can be difficult to determine on the numerical method to achieve new progress. Particularly worth mentioning is that in the engineering technology sector, often use several different methods of calculation, or even the use of experimental methods, in order to determine the reliability of results, which is also an effective and practical method.

计算弹性模量的小程序，学力学的同学用得上-calculate the elastic modulus of small programs, students learn mechanics useful