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TestShellActivity
Test Shell Activity extends Activity implements Layout Test Controller.
- 2014-02-25 12:02:30下载
- 积分:1
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FFT_wavelet
说明: 该课件讲解了小波与fft发展历程以及应用,对于图像处理有一定的帮助!(wavelet,fft)
- 2010-04-21 21:48:17下载
- 积分:1
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Sigmoid
sigmoid函数及其导函数的介绍推导和应用等等(sigmoid text)
- 2012-04-19 18:40:24下载
- 积分:1
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cpso
根据cpso算法给出的一个matlab代码,全,添加测试函数即可运行(According cpso given an algorithm matlab code, full, add test functions to run)
- 2014-01-21 10:28:01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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zishiyingyuzhilvbo
自适应阈值滤波程序,用matlab实现.zishiyinglvzhilvbo(Wiener filtering procedures winer filter to achieve)
- 2009-05-14 17:02:27下载
- 积分:1
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1Trust
说明: 基于D-S证据理论的信任模型研究与实现,用matlab编写代码仿真实现模拟图形(design and realize of belief model baseed on D-S theory of evidence)
- 2011-04-10 15:34:48下载
- 积分:1
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contourletimagefusion
对不同传感器得到的图像进行图像融合,已得到更有利于人或计算机视觉的图像。更好的满足人们的需求(iamge fusion )
- 2010-05-06 17:24:25下载
- 积分:1
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reflectivity_of_film
根据文献波恩的名著《光学原理》编写的,用于计算薄膜的反射率,可以自编测试文件绘出各种反射率图,为方便使用已附了一个测试文件供参考(This program s function is to calculate a reflectivity of film, which is programmed according to the classical masterpiece of the principle of optics by Born.)
- 2011-05-13 11:22:14下载
- 积分:1
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cellularphone
本文开发了一个基于手机的心电图处理系统,可实现心电信号灯实时在线的连续检测和处理。(A cellular phone based online ECG processing system for ambulatory and continuous detection has been developed.)
- 2009-03-11 14:30:36下载
- 积分:1