نتایج جستجو برای: multiplicative approach

تعداد نتایج: 1301778  

In this paper we obtain an upper bound and also a lower bound for maximum edges of strongly 2 multiplicative graphs of order n. Also we prove that triangular ladder the graph obtained by duplication of an arbitrary edge by a new vertex in path and the graphobtained by duplicating all vertices by new edges in a path and some other graphs are strongly 2 multiplicative

2007
Fei Sha Y. Albert Park Lawrence K. Saul

Multiplicative update rules have proven useful in many areas of machine learning. Simple to implement, guaranteed to converge, they account in part for the widespread popularity of algorithms such as nonnegative matrix factorization and Expectation-Maximization. In this paper, we show how to derive multiplicative updates for problems in L1-regularized linear and logistic regression. For L1–regu...

2008
D. Valenti L. Schimansky - Geier

A spatially extended Lotka-Volterra system of two competing species in the presence of two correlated noise sources is analyzed: (i) an external multiplicative time correlated noise, which mimics the interaction between the system and the environment; (ii) a dichotomous stochastic process, whose jump rate is a periodic function, which represents the interaction parameter between the species. Th...

Journal: :Int. J. Approx. Reasoning 2018
Bice Cavallo Matteo Brunelli

Interval Pairwise Comparison Matrices have been widely used to account for uncertain statements concerning the preferences of decision makers. Several approaches have been proposed in the literature, such as multiplicative and fuzzy interval matrices. In this paper, we propose a general unified approach to Interval Pairwise Comparison Matrices, based on Abelian linearly ordered groups. In this ...

2014
Valentina Zadrija Siniša Šegvić

We consider the multi-class object detection approach based on a non-parametric multiplicative kernel, which provides both separation against backgrounds and feature sharing among foreground classes. The training is carried out through the SVM framework. According to the obtained support vectors, a set of linear detectors is constructed by plugging the foreground training samples into the multi...

2006
Rob J Hyndman Muhammad Akram

This paper discusses the instability of eleven nonlinear state space models that underly exponential smoothing. Hyndman et al. (2002) proposed a framework of 24 state space models for exponential smoothing, including the well-known simple exponential smoothing, Holt’s linear and Holt-Winters’ additive and multiplicative methods. This was extended to 30 models with Taylor’s (2003) damped multipl...

2008
D. Blanco D. P. Ruiz M. C. Carrion B. Mulgrew

The use of independent component analysis (ICA) in coherent images needs to take into account the presence of the multiplicative noise that exits in this kind of images. In this paper, the recovery of original images from a mixture contaminated with this type of noise is studied using the ICA ideas. The mixing matrix is obtained using the fourth order multiplicative ICA method, which extracts t...

2004
Eitan Altman Konstantin Avrachenkov Chadi Barakat Arzad Alam Kherani Balakrishna J. Prabhu

Scalable TCP [2] is a proposition for a new TCP where both the increase and the decrease rate of the window size are multiplicative. It has been recently proposed in order to improve performance in high speed networks. In this paper, we present a mathematical analysis of such multiplicative increase multiplicative decrease protocols in the presence of random losses. These are typical to wireles...

2015
Dimitris K. Despotis Dimitris Sotiros Gregory Koronakos

We present in this paper a general network DEA approach to deal with efficiency assessments in multi-stage processes. Our approach complies with the composition paradigm, where the efficiencies of the stages are estimated first and the overall efficiency of the system is obtained ex post. We use multi-objective programming as modeling framework. This provides us the means to assess unique and u...

Journal: :Statistics and Computing 2003
Christophe Croux Peter Filzmoser G. Pison Peter Rousseeuw

In this paper a robust approach for fitting multiplicative models is presented. Focus is on the factor analysis model, where we will estimate factor loadings and scores by a robust alternating regression algorithm. The approach is highly robust, and also works well when there are more variables than observations. The technique yields a robust biplot, depicting the interaction structure between ...

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