基于改进的LANDMARC 算法的空间定位实验

c++实现的查找汉字拼音首字母的算法demo，开用于方便通过首字母检索汉字

实用的fortran版2阶巴特沃斯滤波器。 在李建平程序基础上有细微调整。

带权有向图的最短路径的求解，包括狄克斯特拉算法；弗洛伊德算法；

Another Locally weighted regression

一个模糊查询文件，相当好用，实现环境VC-a fuzzy query documents, quite handy, and to achieve environmental VC

最优网络01匹配算法。-optimal matching algorithm.

求逆矩阵的代码，可能不太好用。只是发上来看看而已。-Inverse matrix of the code, may not be easy to use. Just made up just to see.

"Radar_eq.m"函数实现方程 (1.61）。输出是 dB 中的信噪比或在 Km 范围内不同的地方输入的设置用于每个案例。

介绍时频分析的发展进程，及各种时频方法的分析比较，其中包括WVD-Introduction of time-frequency analysis of the development process, and all kinds of time-frequency analysis and comparison of methods, including the WVD, etc.

This a simple demo of how to evaluate mathematical expressions in text format, including provision for variables and functions. The code consists of three simple classes: 1) Calc - which does the main calculations, 2) Stack - which is used to push and pop intermediate operators and numbers and 3) Symbol Table. The symbol table is a collection of calc symbols, a type structure consisting of various elements, including the expression name, function name, and the final value of the expression The evaluation procedure is done in three steps: 1) simplify the expression by removing all the elements within () and storing them in subexpressions within the symbol table. 2) Each of these sub expressions are then converted to RPN format (Reverse polar notation) and evaluated 3) Finally, the main expression is converted to RPN and evaluated-This is a simple demo of how to evaluate mathematical expressions in text format, including provision for variables and functi