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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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Signal_QPSK
使用matlab生成二进制调幅信号和四进制相移键控信号(Matlab generate binary amplitude modulation signal and quaternary phase shift keying signal)
- 2013-05-15 19:22:53下载
- 积分：1
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qrot3d
四元数实现的三维空间的表达形式，具有表达式简单，运算精度高，占有存储空间小等优点。(quaternion achieve the three-dimensional space of expression, the expression is simple, high precision computing, possession of small storage space advantages.)
- 2006-06-08 21:07:12下载
- 积分：1
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A
说明： Execution cmd.rarExecution cmd.rarExecution cmd.rarExecution cmd.rarExecution cmd.rarExecution cmd.rar
- 2013-12-12 22:11:11下载
- 积分：1
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LSB
主要是用matlab实现的数字水印，其中用到的技术是lsb(Achieved using matlab digital watermarking, which uses the technology is LSB)
- 2013-04-28 10:27:08下载
- 积分：1
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dc
DC Defect Correction Method.
X = DC(A,B) attempts to solve the system of linear equations A*X = B
for X. The N-by-N coefficient matrix A must be square and the right
hand side column vector B must have length This uses the defect
correction method until default convergence criteria or MAXIT
iterations is reached.
- 2013-11-19 00:23:29下载
- 积分：1
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cooperative-communicaion
协同通信信道保密容量与功率分配因子的关系matlab仿真程序(secrecy capacity for cooperative communication)
- 2011-11-16 21:05:46下载
- 积分：1
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GCB_1HC0023255ACEn_A4web[1]
The Generator Circuit-Breaker System type HECS and
HEC 7/8 has been developed as a system suitable for
application in all types of power plants.
The HECS and HEC 7/8 Generator Circuit-Breaker
- 2014-01-22 17:16:24下载
- 积分：1
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graduationproject
echo suppression and noise cancellation
- 2011-10-02 22:53:23下载
- 积分：1
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channel-estimation
整理的几种信道估计方法的源码（可解压直接运行） (MIMO 信道估计 插值方法 )
- 2014-12-22 21:08:52下载
- 积分：1
