Computing
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A set of compact finite-difference approximations to first and second derivatives, related to the extended Numerov method of Chawla on nonuniform grids
Computing - - 2007
The extended Numerov scheme of Chawla, adopted for nonuniform grids, is a useful compact finite-difference discretisation, suitable for the numerical solution of boundary value problems in singularly perturbed second order non-linear ordinary differential equations. A new set of three-point compact approximations to first and second derivatives, related to the Chawla scheme and valid for nonunifor......
Particle swarm optimization based on temporal-difference learning for solving multi-objective optimization problems
Computing - Tập 105 - Trang 1795-1820 - 2023
Multi-objective evolutionary algorithms have become the most important method to deal with multi-objective optimization problems (MOP). To improve the performance of particle swarm optimization (PSO) in addressing MOPs, a multi-objective PSO based on temporal-difference learning (TDLMOPSO) is proposed in this paper. The iteration process of TDLMOPSO is transformed into a Markov decision process, p......
Adaptive federated learning scheme for recognition of malicious attacks in an IoT network
Computing - - Trang 1-16 - 2023
The Internet of Things (IoT) is crucial for deploying a novel Artificial Intelligence (AI) model for both network and application management. However, using classical centralized learning algorithms in the IoT environment is challenging, given massively distributed private datasets. Advancements in AI have helped us solve various use cases, but it operates under two significant challenges. Firstly......
Implicitization of Parametric Curves via Lagrange Interpolation
Computing - Tập 77 - Trang 379-386 - 2006
A simple algorithm for finding the implicit equation of a parametric plane curve given by its parametric equations is presented. The algorithm is based on an efficient computation of the Bézout resultant and Lagrange interpolation. One of main features of our approach is the fact that it considerably reduces the problem of computing intermediate expressions.
Context recognition and ubiquitous computing in smart cities: a systematic mapping
Computing - Tập 103 - Trang 801-825 - 2021
Smart cities are one of the emerging domains for computational applications. Many of these applications may benefit from the ubiquitous computing paradigm to provide better services. An important aspect of these applications is how to obtain data about their users and understand them. Context-aware approaches has been proven to be successful in understanding these data. These solutions obtain data......
Numerical solution of the Boltzmann equation on the uniform grid
Computing - Tập 69 - Trang 163-186 - 2002
In the present paper a new numerical method for the Boltzmann equation is developed. The gain part of the collision integral is written in a form which allows its numerical computation on the uniform grid to be carried out efficiently. The amount of numerical work is shown to be of the order O(n
6log(n)) for the most general model of interaction and of the order O(n
6) for the Variable Hard Spher......
MDER: modified degree with exclusion ratio algorithm for influence maximisation in social networks
Computing - Tập 104 - Trang 359-382 - 2021
The online social network has become an integral part of our day to life and serves as an excellent platform for sharing ideas, opinions, and products. Influence maximization (IM) is a widely studied topic in the area of social network analysis. The objective of IM is to find influential nodes that can disseminate information to a larger extent in the network. Many local and global centrality meas......
A second order monotone upwind scheme
Computing - Tập 36 - Trang 57-67 - 1986
We analyze a special finite difference scheme of upwind type for an ordinary singularly perturbed nonlinear boundary value problem. In particular we prove the uniqueness and monotone dependence upon the right hand sides of the discrete solutions and the second order accuracy in the global domain.
Distribution of Lattice Points
Computing - Tập 78 - Trang 173-193 - 2006
We discuss the lattice structure of congruential random number generators and examine figures of merit. Distribution properties of lattice measures in various dimensions are demonstrated by using large numerical data. Systematic search methods are introduced to diagnose multiplier areas exhibiting good, bad and worst lattice structures. We present two formulae to express multipliers producing wors......
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