1000-8608(2013)05-0742-07

How the K-mean Cluster work Step 1. Begin with a decision the value of k = number of clusters Step 2. Put any initial partition that classifies the data into k clusters. You may assign the training samples randomly, or systematically as the following: Take the first k training sample as single-element clusters Assign each of the remaining (N-k) training sample to the cluster with the nearest centroid. After each assignment, recomputed the centroid of the gaining cluster. Step 3 . Take each sample in sequence and compute its distance from the centroid of each of the clusters. If a sample is not currently in the cluster with the closest centroid, switch this sample to that cluster and update the centroid of the cluster gaining the new sample and the cluster losing the sample. Step 4 . Repeat step 3 until convergence is achieved, that is until a pass through the training sample causes no new assignments. (How the K-mean Cluster workStep 1. Begin with a decision the value of k = number of clusters Step 2. Put any initial partition that classifies the data into k clusters. You may assign the training samples randomly, or systematically as the following: Take the first k training sample as single-element clusters Assign each of the remaining (Nk) training sample to the cluster with the nearest centroid. After each assignment, recomputed the centroid of the gaining cluster. Step 3. Take each sample in sequence and compute its distance from the centroid of each of the clusters. If a sample is not currently in the cluster with the closest centroid, switch this sample to that cluster and update the centroid of the cluster gaining the new sample and the cluster losing the sample. Step 4. Repeat step 3 until convergence is achieved, that is until a pass through the training sample causes no new assignments.)

该代码是用C++编写的遗传算法,可在C++或 matlab环境下都可运行.(The code is C++ Prepared by genetic algorithm, can be C++ Or can be run under matlab environment.)

给定极化状态的相位描述子和幅度描述子，绘制该极化状态的poincare功率球。源代码是matlab子函数，输入参数两个：极化状态的幅度描述子和相位描述子。还有一张示例图(Given the polarization state of the phase and amplitude descriptors descriptors, to draw the polarization state poincare power ball. Functions matlab source code, two input parameters: the polarization state and phase amplitude descriptor descriptor.)

Fminsearch does not admit bound constraints. However simple transformation methods exist to convert a bound constrained problem into an unconstrained problem.

基于MATLAB编写的代码，采用小波阈值降噪的方法对采集的光谱信号进行滤波处理。可自行设定阈值，实现不同的滤波效果。(Based on the code written in MATLAB, using wavelet threshold noise reduction method for filtering spectrum signal acquisition process. You can set the threshold to achieve different filter effects.)

聚类的MATLAb代码程序~此代码实现的为K均值聚类~(Clustering MATLAb code- This code implements the program for K-means clustering ~)

LDPC编码程序--C语言的 能充分了解和学习该方面的技术(LDPC coding procedures C language can fully understand and learn the technical)

说明：  matlab在电信工程中的应用 matlab在电信工程中的应用 (Matlab in telecommunications engineering application of Matlab the telecommunications engineering application of Matlab in telecommunications engineering application)

对样本进行主成分分析： 把原来多个变量划为少数几个综合指标的一种统计分析方法，是一种降维处理技术(Principal component analysis on the samples: the original more than one variable is designated as a few indicators of a statistical analysis method, a dimensionality reduction processing technology )

total-field/scattered-field 2D, square cell TE grid, incident angle range 90<=angle<=180