نتایج جستجو برای: gaussian rbf

تعداد نتایج: 81624  

Journal: :Journal of Computer Science 2022

NetworkIntrusion Detection Systems (NIDS) can protect computer networks and computersystems by detecting abnormal network packets taking agreed action plans,such as notifying an administrator or rejecting the packets. In this study,the aim is implementation of NIDS with improved performance using anensemble Support Vector Machines (SVMs) Gaussian Mixture Model(GMM). Four SVMs Radial Basis Funct...

Journal: :IEEE Journal on Selected Areas in Communications 1994
Urbashi Mitra H. Vincent Poor

| Adaptive methods for performing multiuser demodula-tion in a Direct-Sequence Spread-Spectrum Multiple-Access (DS/SSMA) communication environment are investigated. In this scenario, the noise is characterized as being the sum of the interfering users' signals and additive Gaussian noise. The optimal receiver for DS/SSMA systems has a complexity that is exponential in the number of users. This ...

Journal: :CoRR 2009
Rio Yokota Lorena A. Barba Matthew G. Knepley

We have developed a parallel algorithm for radial basis function (rbf) interpolation that exhibits O(N) complexity, requires O(N) storage, and scales excellently up to a thousand processes. The algorithm uses a gmres iterative solver with a restricted additive Schwarz method (rasm) as a preconditioner and a fast matrix-vector algorithm. Previous fast rbf methods—achieving at most O(N logN) comp...

2001
Jian-cheng LUO Cheng-hu ZHOU Yee LEUNG

Most Artificial neural networks (ANN) models used in the remote sensing classification are based on the multilayer perceptron (MLP) with back-propagation (BP) training algorithm. Compared to conventional statistical classifiers, MLP classifiers are non-parametric and distribution-free and is thus less restrictive in approximation, especially when distributions of features are strongly non-Gauss...

Journal: :Eng. Appl. of AI 2007
Hui Peng Zi-Jiang Yang Weihua Gui Min Wu Hideo Shioya Kazushi Nakano

An integrated modeling and robust model predictive control (MPC) approach is proposed for a class of nonlinear systems with unknown steady state. First, the nonlinear system is identified off-line by RBF-ARX model possessing linear ARX model structure and state-dependent Gaussian RBF neural network type coefficients. On the basis of the RBF-ARX model, a combination of a local linearization mode...

Journal: :SIAM J. Scientific Computing 2013
Elisabeth Larsson Erik Lehto Alfa R. H. Heryudono Bengt Fornberg

Abstract. Radial basis function (RBF) approximation has the potential to provide spectrally accurate function approximations for data given at scattered node locations. For smooth solutions, the best accuracy for a given number of node points is typically achieved when the basis functions are scaled to be nearly flat. This also results in nearly linearly dependent basis functions and severe ill...

Journal: :journal of ai and data mining 2014
mohammad mehdi fateh seyed mohammad ahmadi saeed khorashadizadeh

tthe uncertainty estimation and compensation are challenging problems for the robust control of robot manipulators which are complex systems. this paper presents a novel decentralized model-free robust controller for electrically driven robot manipulators. as a novelty, the proposed controller employs a simple gaussian radial-basis-function network as an uncertainty estimator. the proposed netw...

Journal: :Adv. Comput. Math. 2005
Leevan Ling Edward J. Kansa

Although meshless radial basis function (RBF) methods applied to partial differential equations (PDEs) are not only simple to implement and enjoy exponential convergence rates as compared to standard mesh-based schemes, the system of equations required to find the expansion coefficients are typically badly conditioned and expensive using the global Gaussian elimination (G-GE) method requiring O...

Journal: :IEEE Trans. Signal Processing 1997
Bernhard Schölkopf Kah Kay Sung Christopher J. C. Burges Federico Girosi Partha Niyogi Tomaso A. Poggio Vladimir Vapnik

The support vector (SV) machine is a novel type of learning machine, based on statistical learning theory, which contains polynomial classifiers, neural networks, and radial basis function (RBF) networks as special cases. In the RBF case, the SV algorithm automatically determines centers, weights, and threshold that minimize an upper bound on the expected test error. The present study is devote...

2012
Wei Zhang Su-Yan Tang Yi-Fan Zhu Wei-Ping Wang

Support vector regression (SVR) has been regarded as a state-of-the-art method for approximation and regression. The importance of kernel function, which is so-called admissible support vector kernel (SV kernel) in SVR, has motivated many studies on its composition. The Gaussian kernel (RBF) is regarded as a “best” choice of SV kernel used by non-expert in SVR, whereas there is no evidence, exc...

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