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SM-Aula-10
matlab couse band pass high low very very low, butter, butord, chevychebs etc etc
- 2009-06-06 00:11:33下载
- 积分：1
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SGWUND
将小波相邻系数相关性的降噪思想引入到冗余第2代小波中，提出了基于邻域相关性的冗余第2代小波降噪方法，该方法克服了传统阈值降噪没有考虑小波系数之间相关性的不足。(Aiming at fault feature extraction in the background of strong noise, a wavelet denoising idea by incorporating neighboring coefficients is introduced into redundant second generation wavelet case. A denoising method of redundant second generation wavelet using neighbor dependency is presented. It overcomes the deficiency of traditional thresholding approaches. In this method, an original signal is decomposed by redundant second generation wavelet, and the detail and approximation signals have the same length as the original signal. The detail signals at each scale are then processed by neighbor dependency. Finally, the approximation signal and processed detail signals are reconstructed by inverse transform of redundant second generation wavelet to realize the signal denoising. )
- 2012-03-26 09:27:08下载
- 积分：1
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ftt_exam
fAST FOURIER EXAMPLE
- 2011-06-03 00:14:24下载
- 积分：1
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gaijincandybianyuannjiancesuanfa
一种改进的canndy边缘检测算法，非常新颖，值得学习(An improved edge detection algorithm canndy, very novel, it is worth learning)
- 2014-11-30 21:40:12下载
- 积分：1
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Prayer_Times
Prayer Times Calculator
Calculates Musilm Prayers Times and Sunrise for any location on the earth
- 2015-03-28 21:13:46下载
- 积分：1
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chengxu
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)
- 2017-01-17 19:18:02下载
- 积分：1
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cmex
MATLAB与C接口的关于求两个数最小公倍数的C语言MEX文件(MATLAB and C interface to request two numbers on the least common multiple of the C-MEX files)
- 2010-06-10 15:17:01下载
- 积分：1
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mpsk
在matlab环境下实现了对MPSK通信系统的仿真，(mpsk)
- 2010-05-27 21:02:38下载
- 积分：1
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FN-KNN
基于k近邻规则的PCA方法，改进的主元分析法用于故障诊断(PCA based on KNN)
- 2014-07-04 09:28:42下载
- 积分：1
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huazhuanlvkongzhiqifinish
用simulink建立的完整的汽车滑转率控制的模型，可以应用在电动汽车转矩分配以及稳定性控制中(With the Simulink established a complete model of the car slip rate control, can be applied in the electric vehicle torque distribution and stability control)
- 2016-05-15 13:26:01下载
- 积分：1
