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matlab-zuixiaoerchengnihe
最小二乘法拟合,基于matlab的算法,拟合研究的一部分(LSF Least Square Fit
)
- 2011-04-19 10:09:04下载
- 积分:1
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mag_homework
仿真一维均匀平面电磁波在自由空间(理想介质)中的传播(Simulation of a one-dimensional uniform plane wave in free space (ideal medium) the propagation)
- 2013-11-22 21:39:31下载
- 积分:1
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LMS
最小均方误差自适应算法,简称LMS算法.LMS算法自适应实现
(MMSE adaptive algorithm, or LMS algorithm. LMS adaptive algorithm to achieve)
- 2008-12-30 20:37:02下载
- 积分:1
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BasicsofMATLABandBeyond
hi
i have a huge collection are you interested
- 2009-03-19 23:50:37下载
- 积分:1
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Demo_FOChS2
Numerical solutions of the fractional order chaotic systems
- 2011-01-16 02:01:01下载
- 积分:1
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gg_g
广义高斯分布随机样本的产生,具体讲解了如何产生广义高斯分布随机样本。(Generalized gaussian distribution of random samples produced to explain in detail how to produce, the generalized gaussian random samples.)
- 2011-06-20 21:53:08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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matlab-exp
说明: 用matlab解决一些实际的问题,如交通,销售,动物繁殖等(using Matlab solve some practical problems, such as the transport, sale, breeding, etc.)
- 2006-03-22 11:06:06下载
- 积分:1
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xiaobotongyonghanshu
列举了所有小波的通用函数,以方便以后使用过程中直接查看函数的意义。(General lists all wavelet functions to facilitate the process of direct view later use the meaning of the function.)
- 2011-05-18 11:37:41下载
- 积分:1
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errortest3
一种无线通信系统中,重传技术并且有时间关联的outage的错误检查方法(A radio communication system, and a retransmission is associated with the outage time error checking method)
- 2013-09-12 21:00:25下载
- 积分:1