SiC17093

2003-2021 全部

2008-07-02

#计算机科学技术#

2011-03-31

Bergman函数一直以来都是一个被大量讨论与研究的热门话题。由Bergman函数所展开的一系列问题的研究也取得了很多成果。以前已经研究得到了Green函数与Bergman函数之间的关系，并且

#数学#

PENG Yang,LI Dehua

In this paper a method of the kernel select for the relevance vector machine is proposed. Former researches of RVM usually focus on the advantages of the algorithm in sparsely for less opportunities of over learning, how to accelerate the algorithm in order for needs such as large scale sets, and how to improve the precision of the algorithm by the combination of other algorithms such as PCA or SVM. The parameters of the kernel functions are regarded more important than these functions themselves, so that how to select the appropriate kernel and its parameters is confused for the application of RVM. In this paper, a method for kernel select for the RVM is proposed. Firstly, by simulation experiment, the relationship between σ in Gaussian kernel function and the regression result is discovered. Secondly, by analysis the reason of the experimental result, a common principle for kernel select is presented. Finally, on the principle, a composite kernel and the relation between different parameters and the number of RVs and the error rate in regression are tested by simulation experiment.

2013-12-19

School of Automation, Huazhong University of Sci. & Tech., Wuhan ,School of Automation, Huazhong University of Sci. & Tech., Wuhan

2005-02-07

2015-04-21

#计算机科学技术#

Liu Lijuan,Shen Bo,Wang Xing

Support Vector Machine is a kind of algorithm used for classifying linear and nonlinear data, which not only has a solid theoretical foundation, but is more accurate than other sorting algorithms in many areas of applications, especially in dealing with high-dimensional data. It is not necessary for us to get the specific mapping function in solving quadratic optimization problem of SVM, and the only thing we need to do is to use kernel function to replace the complicated calculation of the dot product of the data set, reducing the number of dimension calculation. This paper introduces the theoretical basis of support vector machine, summarizes the research status and analyses the research direction and development prospects of kernel function.

2013-07-08

National Natural Science Foundation of China under Grant （No. 61172072

the Beijing Natural Science Foundation under Grant （ 61271308

the Beijing Science and Technology Program under Grant （No. 4112045

the Research Fund for the Doctoral Program of Higher Education of China under Grant （No. Z121100000312024

School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044,School of Electronic and Information Engineering, Beijing Jiaotong University, 100044,China Information Technology Security Evaluation Center, 100085

2017-01-31

2012-01-18

#计算机科学技术#

2012-01-04

#地球科学#

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2007-03-15

#地球科学#