SIF_HW1

这是我自编的PQ分解法小程序，采用极坐标形式表示节点电压。(This is my small self of the PQ decomposition process is expressed by polar coordinates node voltage.)

数字信号处理，包括：各种现有信号及随机信号的输入，从文件读取数据的输入，各种滤波器的实现，傅里叶变换等，傅里叶反变换等，谱分析，利用图形界面形式编写，简单且可视化强，便于理解。(Digital Signal Matlab)

说明：  pf upf程序效果对比，建议kalman滤波，控制工程类学习(Compared with PF UPF program, Kalman filter is recommended to control engineering learning)

interesting and easy C++ application for beginers

这是matlab中的时频分析工具箱，希望大家用得上。(This is a matlab in time-frequency analysis toolbox, I hope everyone useful.)

采用快速傅里叶变化，进而获得函数的相频特性和幅频特性(Phase frequency characteristics amplitude-frequency characteristics using the fast Fourier transform, and then get the function)

这里我们针对三级固体火箭进行研究，主要考虑每一级发动机工作时推力 和比冲 与发动机试车存在摄动偏差（相差 ）时所产生火箭关机点时刻的状态偏差。火箭的飞行的动力学方程可建立在地面发射坐标系中，火箭的第一级、第二级和第三级按照固定的俯仰角程序飞行，第二、三级飞行时已在大气层外，此时可忽略气动力的影响。(Here we study for three solid rocket, the main consideration at every level when the engine thrust and state arising the moment the rocket off point perturbation deviation (difference) in the presence of specific impulse and engine test bias. Outside of the rocket flight dynamics equations can be established on the ground coordinate system launch, the rocket s first stage, the second and third stages according to a fixed elevation angle of flight procedures, and the second, when the third flight already in the atmosphere, this when can ignore the effects of gas dynamics.)

说明：  基于matlab的例子群算法故障诊断实例(Example group algorithm fault diagnosis based on MATLAB)

说明：  这个是非常好的matlab图论教程，是书籍和代码都有，对入门复杂网络是非常好的，复杂网络就是以图论入门的(This is a very good Matlab Graph theory tutorial, books and code are available, for the introduction of complex networks is very good, complex networks is the introduction of graph theory)

基于兴趣点颜色及纹理特征的图像检索算法，通过同类比较，平均检索准确率提高11个百分点。(Based on the interest points and texture features of color image retrieval algorithm, through a similar comparison, the average retrieval accuracy rate of 11 percent improve.)