815b

利用matlab gui 成绩查询系统，实现不同文件下的成绩查询(Query system using matlab gui performance and achieve results under different file query)

录制一段自己的语音信号，并对录制的信号进行采样；画出采样后语音信号的时域波形和频谱图；给定滤波器的性能指标，采用窗函数法和双线性变换设计滤波器，并画出滤波器的频率响应；然后用自己设计的滤波器对采集的信号进行滤波，画出滤波后信号的时域波形和频谱，并对滤波前后的信号进行对比，分析信号的变化；回放语音信号；最后，设计一个信号处理系统界面。(Section of their own voice recording signal, and recording the signal sampling draw sample after the speech signal time-domain waveform and frequency spectrum given filter performance indicators, using a window function method and bilinear transformation design of filters, and draw the frequency response filter then use the filter of their own design for the signal acquisition filtering, after filtering the signal to draw the time-domain waveform and spectrum, and filtering of signals before and after contrast, analysis of signal changes playback voice signal Finally, the design of a signal processing system interface.)

这是一个永磁同步电机的驱动系统仿真模型，使用空间矢量控制方法，控制效果不错(this is a simulating model of pmsm svpwm under simulink)

基于分数阶3.0工具箱,对学校分数阶PID控制有一定学习作用(Based on fractional order 3.0 toolbox, it has a certain learning effect on fractional order PID control in schools.)

源程序是关于心音信号分析的，可以对心音进行EMD分解(It is about the dealing of heart voice .)

说明：  遗传算法matlab代码，经过检测无错，希望对大家有用(Genetic algorithm matlab code, error detection)

ABAQUS UMAT 带剪切非线性HASHIN准则(ABAQUS UMAT)

小波谱分析mallat算法经典程序，对原始信号进行低高频的信号分解以及重构，并且进行对比分析。(Algorithm for spectral analysis mallat small classic procedure, the original signal with low frequency signal decomposition and reconstruction, and compared.)

介绍了kf,ekf,ukf ,pf ,upf 的程序代码，是一个比较全的程序代码(Introduced kf, ekf, ukf, pf, upf of program code, is a more all the program code)

说明：  提出了一种改进高阶Butterworth低通滤波器性能的设计方法。首先对高阶Butterworth低通滤波器的极点 进行重新分布，得出改进型Butterworth低通滤波器。性可以由其在基波电压初相位为零时的特性所唯一确定(Periodic voltage and current waveforms on the start time of its corresponding harmonic component of the relationship between the initial phase of research, pointed out that the characteristics of harmonic sources can be its initial phase in the fundamental zero-voltage characteristics of the CD a definite)