نتایج جستجو برای: svm

تعداد نتایج: 21884  

2003
Ji Zhu Saharon Rosset Trevor Hastie Rob Tibshirani

The standard -norm SVM is known for its good performance in twoclass classification. In this paper, we consider the -norm SVM. We argue that the -norm SVM may have some advantage over the standard -norm SVM, especially when there are redundant noise features. We also propose an efficient algorithm that computes the whole solution path of the -norm SVM, hence facilitates adaptive selection of th...

Journal: :ecopersia 0
alireza ildoromi associate professor, department of range and watershed management, malayer university, malayer, iran mahtab safari shad ph.d. student, department watershed management, faculty of natural resources, sari university of agriculture and natural resource, sari, iran

landsat data for 1992, 2000, and 2013 land use changes for ekbatan dam watershed was simulated through ca-markov” model. two classification methods were initially used, viz. the maximum likelihood (mal) and support vector machine (svm). although both methods showed high overall accuracy and kappa coefficient, visually mal failed in separating land uses, particularly built up and dry lands.there...

2011
Sutao Song Zhichao Zhan Zhiying Long Jiacai Zhang Li Yao

BACKGROUND Support vector machine (SVM) has been widely used as accurate and reliable method to decipher brain patterns from functional MRI (fMRI) data. Previous studies have not found a clear benefit for non-linear (polynomial kernel) SVM versus linear one. Here, a more effective non-linear SVM using radial basis function (RBF) kernel is compared with linear SVM. Different from traditional stu...

2007
Enrico Blanzieri Anton Bryl

In this paper we evaluate an instance-based spam filter based on the SVM nearest neighbor (SVM-NN) classifier, which combines the ideas of SVM and k-nearest neighbor. To label a message the classifier first finds k nearest labeled messages, and then an SVM model is trained on these k samples and used to label the unknown sample. Here we present preliminary results of the comparison of SVM-NN wi...

Journal: :JCP 2010
Yuan Ren Guangchen Bai

The use of support vector machine (SVM) for function approximation has increased over the past few years. Unfortunately, the practical use of SVM is limited because the quality of SVM models heavily depends on a proper setting of SVM hyper-parameters and SVM kernel parameters. Therefore, it is necessary to develop an automated, reliable, and relatively fast approach to determine the values of t...

2016
Maolong Xi Jun Sun Li Liu Fangyun Fan Xiaojun Wu

This paper focuses on the feature gene selection for cancer classification, which employs an optimization algorithm to select a subset of the genes. We propose a binary quantum-behaved particle swarm optimization (BQPSO) for cancer feature gene selection, coupling support vector machine (SVM) for cancer classification. First, the proposed BQPSO algorithm is described, which is a discretized ver...

Journal: :Neural computation 2001
Chih-Chung Chang Chih-Jen Lin

The nu-support vector machine (nu-SVM) for classification proposed by Schölkopf, Smola, Williamson, and Bartlett (2000) has the advantage of using a parameter nu on controlling the number of support vectors. In this article, we investigate the relation between nu-SVM and C-SVM in detail. We show that in general they are two different problems with the same optimal solution set. Hence, we may ex...

Journal: :Soft Comput. 2013
Asdrúbal López Chau Xiaoou Li Wen Yu

Normal support vector machine (SVM) is not suitable for classification of large data sets because of high training complexity. Convex hull can simplify the SVM training. However, the classification accuracy becomes lower when there exist inseparable points. This paper introduces a novel method for SVM classification, called convex–concave hull SVM (CCH-SVM). After grid processing, the convex hu...

2004
Hansheng Lei Venu Govindaraju

Support Vector Machine (SVM) is the state-of-art learning machine that has been very fruitful not only in pattern recognition, but also in data mining areas, such as feature selection on microarray data, novelty detection, the scalability of algorithms, etc. SVM has been extensively and successfully applied in feature selection for genetic diagnosis. In this paper, we do the contrary,i.e., we u...

2013
Jie Zhang Xiaohong Wu Yanmei Yu Daisheng Luo

In optical printed Chinese character recognition (OPCCR), many classifiers have been proposed for the recognition. Among the classifiers, support vector machine (SVM) might be the best classifier. However, SVM is a classifier for two classes. When it is used for multi-classes in OPCCR, its computation is time-consuming. Thus, we propose a neighbor classes based SVM (NC-SVM) to reduce the comput...

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