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yahoostock
yahoo股票历史数据下载器，matlab编写(yahoo stock historical data downloader, matlab write)
- 2009-09-24 19:16:23下载
- 积分：1
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EO
说明： 该文件是极值算法的研究，包括一个主程序，一个最适应值程序和一个EO源程序，已通过系统仿真测试(The file is extremal algorithm, including a main program, one of the most fitness programs and a source EO has been tested by simulation)
- 2010-04-26 23:12:14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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TestDwt2Threelayer
该源代码是本人亲自所写，使用DWT对图像可以进行三次小波分解，直接下载可以使用，对图形图像处的同行们非常有用，欢迎下载。(The source code is written by himself, the use of DWT can be three times the image wavelet decomposition, a direct download can be used in the graphic image Department colleagues very useful are welcome to download.)
- 2007-08-19 17:05:35下载
- 积分：1
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LSBwatermark
将水印嵌入并提取的matlab程序，并可进行演示(The watermark embedding and extraction matlab procedures, and demonstrated)
- 2007-11-02 04:49:09下载
- 积分：1
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grnnpredict
对GRNN的进行改进，用来做预测，其中对于每一组输入向量给其一个平滑因子，预测的效果不错(Improvements on the conduct of GRNN, used for prediction, in which each set of input vectors for a smoothing factor to its forecast good results)
- 2021-04-19 10:28:51下载
- 积分：1
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adaptiveAR
AR自适应滤波器，用Kalman滤波器跟踪AR模型的吸收变化(adaptive AR model，use kalman filter to trace the variance of ar coeffience)
- 2013-09-09 10:18:13下载
- 积分：1
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matlab_arc
For use with MATLAB Simulink and Power System Blockset
- 2019-05-17 16:24:14下载
- 积分：1
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Matlab-code
有限元计算程序，三角形线性单元求解泊松方程
包含网格划分，求解，误差分析(Finite element program)
- 2011-11-19 20:56:46下载
- 积分：1
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fdtd-matlab
很多基于fdtd算法的m语言源程序，主要用于初学fdtd算法的人。(Many fdtd algorithm based on m-language source code, mainly for beginners who fdtd algorithm.)
- 2021-03-26 23:39:13下载
- 积分：1
