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image thresholding otsu method

用于<数字信号处理及MATLAB实现>的截断效应(For " digital signal processing and MATLAB realization of" cut-off effects of)

用matlab画了一个小动物，利用了plot，sina，cos等 函数(use Matlab drew a small animal )

小波变换进行变速箱故障诊断 首先将s1和s2信号时域谱（s1代表维修前的振动信号，s2代表维修后的振动信号），画出来进行对比，会发现s1信号的振动幅值会比较高；然后对s1和s2分别进行小波分解并画出各层的时域谱，只对比s1和s2分后的最高时域谱，s2更加的具有周期性，且幅值较小，s2周期性不够明显，且振动过于密集。分析完时域谱后开始分析频谱，首先对原信号s1和s2fft转换，得到频谱图，如图，然后再对小波分析后高频部分进行fft转换，做出频谱图。对比后我们发现，在f 2375HZ出（也就是齿轮的啮合频率），s1信号频谱幅值会有急剧的升高，然后，其谐波的幅值也会增大。所以可以推断出该维修前的增速箱的齿轮可能出现问题。(Gearbox fault diagnosis based on wavelet transform s1 and s2 first time domain signal spectrum (s1 behalf of the vibration signal before maintenance, vibration signal s2 representative of repaired), drawn comparison, you will find a signal s1 vibration amplitude will be higher then s1 and s2 respectively wavelet decomposition and draw the layers of time-domain spectrum to only a maximum time domain spectroscopy s1 and s2 points after, s2 is more cyclical and smaller magnitude, s2 cyclical enough obviously, and the vibration is too dense. End domain spectral analysis after the beginning of the spectrum analysis, the first of the original signal s1 and s2fft conversion to give the spectrum, as shown, and then after the high frequency part of wavelet analysis fft transformation to make spectrum. We found that after the comparison, at f 2375HZ out (i.e. the gear mesh frequency), there will be a sharp increase in the amplitude spectrum of the signal s1, and then, the amplitude of the ha)

PID实时控制的C++语言设计及应用的Matlab仿真成程序(PID实???刂频腃++ 语言设 ?????| 用的Matlab 抡????绦)

介绍了matlab与vc的接口编程，并引入了常见问题解决。(Introduces MATLAB and VC programming interface, and introduces common problems)

像差分析，对像差进行模拟仿真，进行光学设计和像差校正(wavefront abberation analysis)

单相全桥PWM整流模型，多次验证表明，该模型动态响应快，静态误差小，完全符合要求。(The single-phase full bridge PWM rectifier model, verified the model many times, fast dynamic response, static error is small, fully meet the requirements.)

To read the handover/softhandover in 3G communication

matlab对aloha，s-aloha的仿真(matlab pairs of aloha, s-aloha Simulation)