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ECG_fitter
说明: 人体心电信号的滤波,用一个Butterworth低通滤波器,滤除50Hz工频噪声,并采用不同阶数的Butterworth低通滤波器,比较效果(Human ECG signal filtering, using a Butterworth low-pass filter, filter the 50Hz frequency noise, and different orders of Butterworth low-pass filter, compare results)
- 2020-09-05 20:18:06下载
- 积分:1
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yuanjiancechongzhi
利用hough变换进行圆检测的程序,对于圆个数小于4的图像有比较好的效果。(Hough transform circle detection using the procedure, less than 4 for a round number of images have better results.)
- 2011-04-27 12:02:27下载
- 积分:1
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dsp
掌握功率谱估计的方法,分别产生两个零均值的白噪声数据 1 u n 和 2 u n , 其功率都为
2 0.12 u ,让 1 u n 和 2 u n 分别通过一个FIR 系统,得到输出为 1 v n 和 2 v n 。(Master power spectrum estimation method)
- 2013-01-07 15:20:44下载
- 积分:1
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CODE
mat lab code for image compression technique can be decrease for digital images
- 2014-10-29 13:29:00下载
- 积分:1
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9mma
盲均衡的MMA算法,程序绝对可用,欢迎下载。(MMA blind equalization algorithm, the program is definitely available, welcome to download.)
- 2021-04-20 20:58:50下载
- 积分:1
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adaboost
AdaBoost元算法属于boosting系统融合方法中最流行的一种,说白了就是一种串行训练并且最后加权累加的系统融合方法。
具体的流程是:每一个训练样例都赋予相同的权重,并且权重满足归一化,经过第一个分类器分类之后,
计算第一个分类器的权重alpha值,并且更新每一个训练样例的权重,然后再进行第二个分类器的训练,相同的方法.......
直到错误率为0或者达到指定的训练轮数,其中最后预测的标签计算是各系统*alpha的加权和,然后sign(预测值)。
可以看出,训练流程是串行的,并且训练样例的权重是一直在变化的,分错的样本的权重不断加大,正确的样本的权重不断减小。
AdaBoost元算法是boosting中流行的一种,还有其他的系统融合的方法,比如bagging方法以及随机森林。
对于非均衡样本的处理,一般可以通过欠抽样(undersampling)或者过抽样(oversampling),欠抽样是削减样本的数目,
过抽样是重复的选取某些样本,最好的方法是两种进行结合的方法。
同时可以通过删除离决策边界比较远的样例。
(AdaBoost boosting systems dollar fusion algorithm is the most popular one, it plainly systems integration approach is a serial train and final weighted cumulative.
Specific process is: Each training example is given equal weight, and the weights satisfy normalization, after the first classifiers after
Calculating a first classifier weights alpha value for each sample and updates right weight training, and then the second classifier training, the same way .......
0, or until the specified error rate training rounds, wherein the label is the calculation of the final prediction system* alpha weighted and then sign (predicted value).
As can be seen, the training process is serial, and weight training examples is always changing, the right of the wrong sample weight continued to increase, the right to correct sample weight decreasing.
AdaBoost algorithm is an element, as well as other methods of boosting popular systems integration, such as bagging and random forest method.
For )
- 2014-07-09 19:24:29下载
- 积分:1
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OFDM_MATLABmfile
该程序是实现OFDM在频带上的运用,挺好用的(The program is to achieve the use of OFDM in the band, very good use)
- 2010-11-23 12:03:36下载
- 积分:1
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mfcc
为MFCC的MATLAB程序,用于语音识别结束的特征参数提取(MFCC)
- 2009-06-01 10:46:09下载
- 积分:1
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SVMLS_v0
说明: 该程序是几何活动轮廓模型的matlab源代码.(active contour model
matlab)
- 2011-04-12 09:45:44下载
- 积分:1
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pr
求脉率的小demo,有任何问题可以联系我。(A demo about the value of pulse rate .If there any questions , you can contact me.)
- 2013-08-07 21:29:01下载
- 积分:1