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HHT变换的matlab程序，简单明了，希望对大家的学习有帮助(HHT transform matlab program simple, we want to help the learning)

this is a mass-spring system that show the animation of mass on vertical spring by changing the initial values

说明：  matlab编写的源程序，用于粒子滤波！(matlab source code written for the particle filter!)

说明：  最近闲着没事用matlab做了一个日历，程序如下，请(Matlab recent idle nothing to do with a calendar, the following procedure, please)

高压直流输电模型，6个脉动模型，仿真故障，参考电流变化(HVDC model)

Fminsearch不承认的约束限制。 不过简单的转换方法存在 转换成一个绑定的约束问题 无约束问题。 Fminsearchbnd用于酷似fminsearch， 除了边界应用到变量。 应用于国内的界限，利用 改造中的变量。 （二次型 单式，双罪恶界（十）。） 具有包容性的不平等的界限，它承认 边界值本身，但不准 在所有函数之外的范围评估。 请注意，fminsearchbnd允许用户准确地固定在某个给定值通过设置一个变量的确切范围相同的值。(Fminsearch does not admit bound constraints. However simple transformation methods exist to convert a bound constrained problem into an unconstrained problem. Fminsearchbnd is used exactly like fminsearch, except that bounds are applied to the variables. The bounds are applied internally, using a transformation of the variables. (Quadratic for single bounds, sin(x) for dual bounds.) The bounds are inclusive inequalities, which admit the boundary values themselves, but will not permit ANY function evaluations outside the bounds. Note that fminsearchbnd allows the user to exactly fix a variable at some given value, by setting both bounds to the exact same value.)

本文详细阐述了在matlab编程环境中如何进行数据拟合，非常详细的(This paper describes how in the matlab programming environment for data fitting, very detailed)

动态PCA方法，引入动态时间l，考虑变量本身的时序自相关性，同时还分析变量之间的时序相关性,把PCA方法应用到动态数据矩阵。 (Dynamic PCA method, introducing dynamic time l, consider the timing of the variable itself autocorrelation, also analyzed the correlation between the timing variables, the PCA method is applied to dynamic data matrix.)

Multi-Layer optical filter. FDTD Simulation comparing with analytic methods.

turbo ofdm in fading channel