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lfm11
针对宽带信号的的LFM(线性调频信号)信号的simulink仿真,包括频谱图等(I have just taken the job of the matlab simulation for the LFM signal.)
- 2013-11-05 10:49:42下载
- 积分:1
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kuopin
信号用m序列进行扩频,成型滤波和BPSK调制后经过信道发送到接收端,接收端进行解扩解调(Using m sequence spread spectrum signal, after forming filter and BPSK modulation channel is sent to the receiver, the receiver to enlarge demodulation
)
- 2013-10-10 00:01:06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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新建文件夹 (3)
主要是建立考虑温度场与立场耦合下的直齿轮动力学模型。通过龙格库塔法求解,得出一系列的动态特性。(The dynamic model of spur gear is mainly established considering the coupling of temperature field and position. A series of dynamic characteristics are obtained by using the runge-kutta method.)
- 2018-06-08 12:33:04下载
- 积分:1
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JPEG压缩程序
能够实现,已经调试,能够实现,已经调试,能够实现,已经调试,能够实现,已经调试,能够实现,已经调试,能够实现,已经调试,能够实现,已经调试,能够实现,已经调试,能够实现,已经调试,能够实现,已经调试,能够实现,已经调试。
- 2022-02-26 06:46:12下载
- 积分:1
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数据挖掘中SVM算法实现
数据挖掘中SVM算法实现(用MATLAB实现)(SVM data mining algorithm (MATLAB))
- 2005-05-18 20:03:50下载
- 积分:1
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danziyoudushoupozhendong
说明: 实现单自由度受迫振动,图像绘制,我们可以绘制出单自由的图像出来,供我们参考(we can use this specification for program to draw the picture,this program is writed by matlab and it is easy to understand.)
- 2011-03-08 16:05:36下载
- 积分:1
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SISO-Viterbi
正需要这方面的资料,Viterbi算法在业界很强,和大家一起分享交流(Is in need of this information, Viterbi algorithm in the industry is very strong, and we share exchange)
- 2014-09-18 10:57:05下载
- 积分:1
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Matlab-senior-notes(3)
Matlab高级讲义-控制系统的数学描述与建模(Matlab senior notes- the mathematical description of the control system and modeling)
- 2011-12-24 21:12:57下载
- 积分:1
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ofdm-simulinkCODE1
一个OFDM的仿真代码,可以直接在MATLABA上运行(an OFDM simulation code can be directly operated in MATLABA)
- 2006-11-24 14:26:47下载
- 积分:1