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regularsolution
这是关于数学物理不适定问题正则化解算法的Matlab源程序(This is on the ill-posed problems of mathematical physics is the source Matlab algorithm to resolve)
- 2009-06-21 17:19:34下载
- 积分:1
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filter
各种滤波器的设计,包括高斯低通滤波器。hilberrt带通滤波器,插值滤波器等等。(Various filter design, including Gaussian low-pass filter. hilberrt band-pass filter, the interpolation filter and so on.)
- 2013-07-10 11:51:06下载
- 积分:1
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matlab
基于matlab的直流序列发生器,包括m序列的产生,扩频等功能(m seguence frequency spread DSSS )
- 2011-11-27 16:59:39下载
- 积分:1
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fangzhen
GPS filtering down to prevent
- 2015-04-11 14:58:19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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simplex2p
Solving the LP problem using Simplex method
- 2010-06-26 19:00:45下载
- 积分:1
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course-of-study-of-wavelet
小波的教程书的配套matlab,边练边学,极易入门。对新手很有用(the course of study of wavelet,good use for the newman)
- 2015-03-05 23:27:51下载
- 积分:1
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cdma
实现四路复用程序。通过walsh正交码的复用技术,matlab仿真(achieve multiplexing process. Walsh orthogonal codes through the Reuse, Matlab simulation)
- 2007-07-04 11:35:21下载
- 积分:1
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x2em
实现对给定的数据服的拟合优度的检验,内有详细程序说明(To achieve a given data service goodness of fit test, with detailed description of the procedures)
- 2013-10-08 10:04:28下载
- 积分:1
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music
功率谱估计 music算法matlab实现(music algorithm of power spectral estimation and its realization)
- 2014-02-24 21:09:29下载
- 积分:1