pca3

calculating partial differentiation of the iris contours.

说明：  在机器学习问题中，很多的算法归根到底就是在求解一个优化问题，然而我们的现实生活中也存在着很多的优化问题，例如道路上最优路径的选择，商品买卖中的最大利润的获取这些都是最优化的典型例子，前面也陆续地有一些具体的最优化的算法，如基本的梯度下降法，牛顿法以及启发式的优化算法(PSO,ABC等)。(In machine learning problems, many algorithms are in the final analysis to solve an optimization problem. However, in our real life, there are also many optimization problems, such as the choice of the optimal path on the road, the acquisition of the maximum profit in the sale of goods. These are typical examples of optimization. There are also some specific optimization algorithms, such as basic gradient Descent method, Newton method and heuristic optimization algorithm (PSO, ABC, etc.).)

详细介绍了 用基于Matlab软件实现Delaunay剖分和基于剖分的规格化计算(Described in detail based on Matlab software implementation Delaunay mesh and mesh-based calculation of standardized)

实现快速c均值聚类，能快速有效的对图像实现聚类分割，效果不错。(Rapid c-means clustering, can quickly and effectively split the image clustering, good results.)

杜建明 编著，是少有的中文版的专门讲mathematica在电磁场理论中的应用的书籍，例子丰富(杜建明 edited, is a rare devoted mathematica in electromagnetic theory in the Chinese version of the book, rich in examples)

本代码主要仿真了维特比解码（5,4,2）的SPC码的仿真使用以及其性能(This code simulated Viterbi decoding (5,4,2) SPC code simulation use, as well as its performance)

游程编码是一种简单的非破坏性资料压缩法，其好处是加压缩和解压缩都非常快。(RLE is a simple non-destructive data compression method, the added advantage of very fast compression and decompression. The method is to calculate the length of consecutive compression of the data.)

lorenz序列产生程序，自己编写的，可产生时域波形图和混沌吸引子相图。(Lorenz chaotic sequence generation process, the preparation of their own, can produce the time-domain waveform and chaotic attractor.)

实现傅里叶变换高通、低通滤波，理想滤波，各种滤波因子。(Fourier transform to achieve high-pass, low-pass filtering, ideal filtering, filter factor.)

关于天线理论的一本书，对散射的研究很深刻，适合作为隐身设计的参考资料(A book about the antenna theory, the research on scattering is very deep, suitable as a stealth design reference)