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说明：  Learning.Unreal.Engine.iOS.Game.Development.2015 虚幻四IOS发布(Learning.Unreal.Engine.iOS.Game.Development.2015)

此文件包含有限元分析与应用书籍pdf和相应的matlab源码(the book and the matlab code for the book---finite element analysis and application)

some bit manipulation python codes

很不错的基础教程，英文版的，是文字排版，非扫描的，非常清晰。(Very good basic tutorial, the English version, text typesetting, non scanning, very clear.)

说明：  ofdm通信系统的simulink模型，采用bpsk调制。(Simulink model of OFDM communication system)

有关logistic和Henon映射的分岔图，李雅普诺夫指数的计算程序，配套书籍《混沌的计算实验与分析》(About the bifurcation diagram of logistic and Henon map, the calculation program of Lee Yap Andrianof index, the experiment and analysis of the calculation of the book chaos .)

说明：  实现对逆变器的三相电流、三相电压、三相IGBT温度、三相的频率等采样，涉及了应用层程序和底层程序(Sampling of three-phase current, three-phase voltage, three-phase IGBT temperature and three-phase frequency of inverters is realized, which involves application layer program and bottom layer program.)

《Matlab有限元结构动力学分析与工程应用》一书中例子的源程序，对于学习采用matlab进行有限元计算很有指导意义！(The source program of the example in the book "Dynamic Analysis and Engineering Application of Finite Element Structures in MATLAB" is very instructive for learning how to use matlab to carry out finite element calculation.)

说明：  传统经验模态分解基于信号的极值点，例如δ(t) 函数就不能用 EMD 来处理，为抑制这一影响，Huang 于 2005 年提出了一种加噪的经验模态分解方法，即集总经验模态分解（Ensemble empirical mode decomposition，EEMD）。其基本原理是在原始信号上加上幅值很小的白噪声，然后做EMD分解，使不同尺度的信号成分映射到相应阶数的IMF 上。(Traditional empirical mode decomposition (EMD) is based on the extremum of signal)

为和各位大神探讨DC-DC控制，特意在MATLAB中DC-DC闭环控制仿真(DC-DC Closed Loop Control Simulation in MATLAB)