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svm-mmse-ls
模式识别中常用的算法,有感知机算法,支撑矢量机算法和LS算法,并附有实验报告,源程序!(Commonly used pattern recognition algorithms, has perceptron algorithm, support vector machine algorithm and the LS algorithm, along with lab reports, source code!)
- 2010-09-07 23:02:47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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positionspeedcurrent
pmsm 位置环 速度环 电流环 采用pi 控制(pmsm position The position loop speed loop current loop adopts PI control)
- 2018-05-01 17:31:40下载
- 积分:1
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zxecf
matlab中最小二乘法拟合程序,很有用并且很简单的拟合程序(zxecf)
- 2010-07-20 11:50:10下载
- 积分:1
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simulations
voltage source inverter
- 2011-01-11 01:23:58下载
- 积分:1
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capon1 (2)
卡宾应用于阵列信号处理算法,用于空域滤波(The minimum mean square error for uniform array is applied to array signal processing.)
- 2018-04-26 23:31:58下载
- 积分:1
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基于MATLAB的潮流计算
用MATLAB实现的牛顿拉夫逊潮流计算 适用于配电网 五节点计算算例
- 2022-11-18 20:00:04下载
- 积分:1
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代码,用于确定一函数是否为负半定
此代码为其找到的 E 值的范围函数 f x 3 x 2 x 1) = 2 * x 1 * x 1-2 x 3-x ^2 ^ x 3 ^2-5 * 2 2 * E * x 1 * x 2 * x 2-4 * x 3 是负半正定
- 2023-08-18 14:30:02下载
- 积分:1
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Matlab_Codes
该代码是书籍源码,是matlab的书的源代码,里面是算法实例,(The source code is the book, the book is the matlab source code, which is the algorithm instance,)
- 2010-11-23 13:57:49下载
- 积分:1
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Matlab-Basics
Matlab Basic General description
- 2009-08-15 19:28:31下载
- 积分:1