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The NCT includes 4 External validity indices and 8 internal validity indices, and the sub-routine validity_Index.m is designed to use them. This tool is suitable for the research work such as the performance comparison of different indices on estimation of the number of clusters, algorithm design by improving part codes of this toolbox. i) External validity indices when true class labels are known: Rand index Adjusted Rand index Mirkin index Hubert index ii) Internal validity indices when true class labels are unknown: Silhouette Davies-Bouldin Calinski-Harabasz Krzanowski-Lai Hartigan weighted inter- to intra-cluster ratio Homogeneity Separation iii) Others Error rate (compared with true labels) System Evolution: it is used to estimate the number of clusters and give separable degrees between clusters.

说明：  光伏特性曲线m文件，运行可用。在不同温度和光照条件都有。(Photovoltaic characteristic curve m file, available for operation. In different temperature and light conditions.)

智能天线技术 DOA估计-算法 波达方向估计 capon算法 (Smart antenna technology in DOA estimation algorithm for DOA estimation algorithm for capon)

背景差检测运动目标，个别子程序需要自己编写(Background subtraction detection of moving targets, individual subroutines need to write your own)

该代码实现产生一个窄带随机信号，该信号的自相关函数及其功率谱图形。(The code generates a narrow-band random signal, the autocorrelation function and power spectrum graphics.)

Spread Spectrum Technique simply consumes spectrum in excess of the minimum spectrum necessary to send the data.

DTMF 系统的matlab实现，发送电话11位电话号码在接收端识别。(DTMF system matlab realize, send telephone 11 telephone numbers identified on the receiving end)

2011年全国大学生数学建模大赛A题，8种主要重金属元素在该城区的空间分布(National Mathematical Modeling Contest A title in 2011, eight major heavy metal elements in the spatial distribution of the city)

Rake receiver in uwb 802.15.3a

This is PCA source. please contact me if you have some question.