نتایج جستجو برای: روشهای دادهکاوی svm

تعداد نتایج: 44367  

2011
Ming-Syan Chen Keng-Pei Lin

Training support vector machines (SVMs) with nonlinear kernel functions on large-scale data are usually very timeconsuming. In contrast, there exist faster solvers to train the linear SVM. We propose a technique which sufficiently approximates the infinite-dimensional implicit feature mapping of the Gaussian kernel function by a low-dimensional feature mapping. By explicitly mapping data to the...

2009
Yuanhai Shao Yining Feng Jing Chen Naiyang Deng

Support vector machines (SVM) have been promising methods for classification analysis due to their solid mathematical foundations. Clustering-based SVMs are used to solve large samples classification problems and reduce the computational cost. In this paper, we present a density clustering based SVM(DCB-SVM) method to predict polyadenylation signal (PAS) in human DNA and mRNA sequences. We decr...

2017
Parashjyoti Borah Deepak Gupta

SVM is extensively used in pattern recognition because of its capability to classify future unseen data and its’ good generalization performance. Several algorithms and models have been proposed for pattern recognition that uses SVM for classification. These models proved the efficiency of SVM in pattern recognition. Researchers have compared their results for SVM with other traditional empiric...

Journal: :JSW 2012
Xuemei Zhang Li Yang

Support Vector Machine (SVM) is a classification technique based on Structural Risk Minimization (SRM), which can run on MATLAB. For classification of nonseparable samples, conventional SVM needs to select a tradeoff between maximization the margin and misclassification rate. In order to guarantee generalized performance and low misclassification rate of SVM, this paper puts forward an improved...

2008
Jun-Yan Tan Zhi-Xia Yang

In this paper, we propose a novel method based on support vector machine (SVM) for microarray classification and gene (feature) selection. The proposed method, called similaritybased SVM (SSVM), incorporates the prior knowledge of gene similarity into the standard SVM by combining the standard l2 norm and the similarity penalty of all the genes. The preliminary experiments show that our method ...

ژورنال: :کنترل 0
محمد توسلی mohammad tavassoli دانشگاه صنعتی خواجه نصیر الدین طوسی محمد توکلی بینا mohammad tvakoli bina دانشگاه صنعتی خواجه نصیر الدین طوسی مسعود علی اکبر گلکار masoud aliakbar golkar دانشگاه صنعتی خواجه نصیر الدین طوسی

svm یک تکنیک مدولاسیون شناخته شده برای مبدل های قدرت با توان متوسط و ولتاژ بالا می باشد. باید توجه داشت که تمام فرآیند مدولاسیون برای هدف پیاده سازی می تواند زمان بر باشد که علت آن یافتن موقعیت بردار مرجع به علاوه اجرای محاسبات ضروری برای مدولاسیون می باشد. علاوه بر آن با افزایش تعداد سطوح در مبدل های چند سطحی، زمان این محاسبات برای svm های متداول افزایش می یابد. این مقاله یک تکنیک مدولاسیون را...

Journal: :Neural computation 2017
Shuhei Fujiwara Akiko Takeda Takafumi Kanamori

Nonconvex variants of support vector machines (SVMs) have been developed for various purposes. For example, robust SVMs attain robustness to outliers by using a nonconvex loss function, while extended [Formula: see text]-SVM (E[Formula: see text]-SVM) extends the range of the hyperparameter by introducing a nonconvex constraint. Here, we consider an extended robust support vector machine (ER-SV...

2014
Wu Deng Xinhua Yang Huimin Zhao Li Zou Zhengguang Li Wen Li

The optimal parameters of the support vector machine (SVM) are very important for accuracy modeling and generalization performance. The quantum particle swarm optimization (QPSO) algorithm takes on the characteristics of the rapid global optimization, scale chaos method provides the characteristics of the fast convergence and the SVM has the characteristics of the nonlinear fitting. These advan...

2013
Vinzenz von Tscharner Hendrik Enders Christian Maurer

PURPOSE The classification between different gait patterns is a frequent task in gait assessment. The base vectors were usually found using principal component analysis (PCA) is replaced by an iterative application of the support vector machine (SVM). The aim was to use classifyability instead of variability to build a subspace (SVM space) that contains the information about classifiable aspect...

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