A new grid adaptation strategy, which minimizes the truncation error of a pth-order nite di erence approximation, is proposed. The main idea of the method is based on the observation that the global truncation error associated with discretization on nonuniform meshes can be minimized if the interior grid points are redistributed in an optimal sequence. The method does not explicitly require the...

Analyzing repeated di erence tests aims in signi cance testing for di erences as well as in estimating the mean discrimination ability of the consumers. In addition to the average success probability, the proportion of consumers that may detect the di erence between two products and therefore account for any increase of this probability is of interest. While some authors address the rst two goa...

Conservativity and complete conservativity of nite di erence schemes are considered in connection with the nonlinear kinetic Landau–Fokker–Planck equation. The characteristic feature of this equation is the presence of several conservation laws. Finite di erence schemes, preserving density and energy are constructed for the equation in oneand two-dimensional velocity spaces. Some general method...

The amplitude computation requires an accurate approximation for the traveltime gradient and Laplacian. Since it is hard to compute the traveltimes with a secondor higher-order accuracy in realistic media, the di erence approximations of the traveltime derivatives may not be suitable for accurate amplitudes unless special cares are taken. This article is concerned with a concurrent simulation o...

In this paper, a novel visualization method for partitions of multidimensional data is presented. It can be used for characterization of one or comparison of two partitions. The method nds the variables that best describe a partition or di erence between partitions. It is especially useful when the data set size is large and there are many variables, i.e., the data dimension is high. The method...

In this paper, a novel visualization method for partitions of multidimensional data is presented. It can be used for characterization of one or comparison of two partitions. The method nds the variables that best describe a partition or di erence between partitions. It is especially useful when the data set size is large and there are many variables, i.e., the data dimension is high. The method...

This paper presents a new fuzzy multicriteria classi®cation method, called PROAFTN, for assigning alternatives to prede®ned categories. This method belongs to the class of supervised learning algorithms and enables to determine the fuzzy indi€erence relations by generalising the indices (concordance and discordance) used in the ELECTRE III method. Then, it assigns the fuzzy belonging degree of ...

In this paper two recursive constructions for optimal optical orthogonal codes are presented by means of incomplete di/erence matrices and perfect cyclic di/erence packings. These improve the known existence results concerning optimal (v; 4; 1)-OOCs. c © 2002 Elsevier Science B.V. All rights reserved.

In this paper we will consider two algorithms which allow us to obtain second order linear di erence equations for certain families of polynomials. The corresponding algorithms can be implemented in any computer algebra system in order to obtain explicit expressions of the coe cients of the di erence equations. c © 1998 Elsevier Science B.V. All rights reserved. AMS classi cation: 33C45; 42C05

OBJECTIVES This study aims to compare the frequency of fecal incontinence and healing rate in patients treated with Open Internal Anal Sphincterotomy (OIAS) Closed Lateral (CLIAS). METHODOLOGY randomized control trial was carried out Department Surgery Hayatabad Medical Complex, Peshawar Pakistan from Feb 2019 2020. Eighty-four were assigned open method Group B while eighty-four allocated close...