linear304

this is a algorithm Fast PCA, it is very suitable for beginer who want to understand PCA, it is demo step by step

利用STFT可以估计信号在每片短时窗内的频率得到信号的瞬时频率，该曲线由一组时间和频率相对应的点组成，反映了信号频率随时间的变化。(Using STFT can estimate the frequency of the signal in every piece of short-time window get signal instantaneous frequency, the curve consists of a set of time and frequency of corresponding points, reflects the signal frequency changes over time. )

PCA的原代码，绝对好使，大家用了就知道~~~希望对大家有帮助(the original code, absolutely so, we have spent know ~ ~ ~ hope to be helpful)

运用matlab的攻击水平机动目标比例导引三维弹道仿真(Attacks using matlab proportional navigation for maneuvering target level of three-dimensional trajectory simulation)

说明：  maltab j求解背包问题 遗传算法(maltab 0-1bag gasuanfa )

ga code for ucp programm using ga tool extracted

基于matlab的12脉波整流电路的仿真文件 ，可以观察波形(Matlab-based simulation files 12-pulse rectifier circuit)

粒子群算法是求解函数优化问题的一种新的进化算法，然而它在求解高维函数时容易陷入局部最优，为了克服这个缺点，提出了一种新的粒子群算法，算法对粒子的速度和位置更新公式进行了改进，使粒子在其最有位置的基础上进行位置更新，增强了算法的寻优(PSO for solving function optimization problems is a new evolutionary algorithm, but it is easy to solve high-dimensional function into local optimum, in order to overcome this shortcoming, a new particle swarm algorithm, algorithm on the particle velocity and location of the update formula has been improved, so that particles in the most positions on the basis of location updates, enhancements, optimization algorithm)

求解三体问题，并画动态图像。同时含有解释三体问题的pdf文件(Solving the three-body problem, and draw a dynamic image. Also contains a pdf file explaining the three-body problem)

active shape model的matlab代码实现，用于图像处理，模式识别等方面(active shape model of matlab code for image processing, pattern recognition, etc.)