A kernel-based Perceptron with dynamic memory

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	A kernel-based Perceptron with dynamic memory
	He, Wenwu ; Wu, Si
刊名	NEURAL NETWORKS
	2012
卷号	25 页码:106-113
关键词	On-line learning Pattern classification Kernel methods Perceptron and projection ONLINE ALGORITHM DESCENT
ISSN号	0893-6080
通讯作者	He, WW (reprint author), Fujian Univ Technol, Dept Math & Phys, Fuzhou 350108, Fujian, Peoples R China,hwwhbb@163.com
英文摘要	In this study, we propose a dynamical memory strategy to efficiently control the size of the support set in a kernel-based Perceptron learning algorithm. The method consists of two operations, namely, the incremental and decremental projections. In the incremental projection, a new presented instance is either added to the support set or discarded depending on a predefined rule. To diminish information loss, we do not throw away those discarded examples cheaply, instead their impact to the discriminative function is sustained by a projection technique, which maps the modified discriminative function into the space spanned by the original support set. When a new example is added to the support set, the algorithm moves to the decremental projection. We evaluate the minimum information loss by deleting one instance from the support set. If this minimum information loss is less than a tolerable threshold, then the corresponding instance is removed; however, its contribution to the discriminative function is reserved by the projection technique. By this, our method can on one hand keep a relatively small size of the support set and on the other hand achieve a high classification accuracy. We also develop a method which sets a budget for the size of the support set. We test our approaches to four benchmark data sets, and find that our methods outperform others in either having higher classification accuracies when the sizes of their support sets are comparable or having smaller sizes of the support sets when their classification accuracies are similar. (C) 2011 Elsevier Ltd. All rights reserved.
学科主题	Computer Science ; Neurosciences & Neurology
收录类别	SCI
资助信息	973 program of China[2011CBA00406]; State Key Laboratory of Neuroscience in Shanghai, China
语种	英语
公开日期	2012-07-13
内容类型	期刊论文
源URL	[http://ir.sibs.ac.cn/handle/331001/1514]
专题	上海神经科学研究所_神经所(总)
推荐引用方式 GB/T 7714	He, Wenwu,Wu, Si. A kernel-based Perceptron with dynamic memory[J]. NEURAL NETWORKS,2012,25:106-113.
APA	He, Wenwu,&Wu, Si.(2012).A kernel-based Perceptron with dynamic memory.NEURAL NETWORKS,25,106-113.
MLA	He, Wenwu,et al."A kernel-based Perceptron with dynamic memory".NEURAL NETWORKS 25(2012):106-113.