Special-Package-II

一种新的集群优化算法，粒子群优化算法，重要文献(New cluster optimization algorithm PSO)

matlab时间序列分析，是进行matlab学习与研究进行的很好的东西，适合初学者学习(matlab time series analysis, is a good thing matlab learning and research, for beginners to learn)

在实际计算中，有时为了避免开方运算，或者要分解的矩阵只是对称而不是正定的，这时可以选用适合于一般对称阵的分解式(In the actual calculation, sometimes in order to avoid root operation, or just want to break down the matrix rather than positive definite symmetric, then you can choose suitable for general symmetric matrix factorization)

文件是 天线与电波传播 第3版 2017 的课件资源。 该书围绕天线与电波传播两大内容展开。全书共 14 章。前9章为天线部分，各章内容分别为：天线基础知识、简单线天线、行波天线、非频变天线、缝隙天线与微带天线、手机天线、测向天线、面天线、新型天线；后5章为电波传播部分，各章内容分别为：电波传播的基础知识、地面波传播、天波传播、视距传播、地面移动通信中接收场强的预测。(The document is the courseware resource of the third edition of antenna and radio wave propagation 2017. The book launches around two main contents: antenna and radio wave propagation. The book consists of 14 chapters. The first nine chapters are the antenna section, which includes the basic knowledge of antenna, simple wire antenna, traveling wave antenna, non-frequency-varying antenna, slot antenna and microstrip antenna, mobile phone antenna, direction finding antenna, surface antenna and new type antenna, and the last five chapters are the radio wave propagation section, which includes the basic knowledge of radio wave propagation, the ground. Wave propagation, sky wave propagation, line of sight propagation, and prediction of received field strength in ground mobile communication.)

NFC NDEF Arduino source and example

一种经验模态分解算法，很好用的信号分析方法(a kind of method for EMD)

说明：  MATLAB 学习小程序： BP神经网络的数据分类-语音特征信号分类(MATLAB learning applet: data classification of BP neural network-speech feature signal classification)

Topological derivative Segmentation

This is a steganography program using least significant bis to hide image in other image program

包括5个程序,两个是logistic映射的相图和分岔图,三个是henon映射的相图,分岔图和比较图.(Includes five programs, two of which are in the phase diagram and logistic map bifurcation diagram, three phase diagram is mapped henon, bifurcation diagram and comparison chart.)