Results 71 to 80 of about 11,687,734 (245)

Matrix-based Chebyshev collocation technique for nonlinear system of differential Riccati equations

Alexandria Engineering Journal
This paper presents a novel and efficient spectral collocation method for solving systems of differential Riccati equations (SDREs) with variable coefficients.
Ibtisam Aldawish, Lakhlifa Sadek, Zakia Hammouch, Ahmed Shafee, Ioan-Lucian Popa   +4 more
doaj   +1 more source

Applications of Legendre spectral collocation method for solving system of time delay differential equations

Advances in Mechanical Engineering, 2020
The numerical techniques are regarded as the backbone of modern research. In literature, the exact solution of time delay differential models are hardly achievable or impossible. Therefore, numerical techniques are the only way to find their solution. In
Sami Ullah Khan, Ishtiaq Ali
doaj   +1 more source

Synthesis of Tris(indol‐3‐yl)methanes From Indoles, CO2, and Dimethylphenylsilane With BPh3: Two‐Step Construction of π‐Conjugated Systems

Chemistry – A European Journal, EarlyView.
Tris(indol‐3‐yl)methanes were synthesized from indoles, CO2, and PhMe2SiH in the presence of BPh3 in acetonitrile at 50°C. One product, tris(4‐bromo‐1‐methylindol‐3‐yl)methane, underwent a palladium‐catalyzed cascade reaction for the formation of a novel polycyclic heteroaromatic compound, where the methine C(sp3) atom originating from CO2 was ...
Sha Li, So Saibara, Reito Yasui, Kazuto Takaishi, Natsumi Nitta, Tadashi Ema   +5 more
wiley   +1 more source

Optimal Dynamics Control in Trajectory Tracking of Industrial Robots Based on Adaptive Gaussian Pseudo-Spectral Algorithm

Algorithms
A pseudo-spectral control algorithm based on adaptive Gauss collocation point reconstruction is proposed to efficiently solve the optimal dynamics control problem of industrial robots.
Jing Zhang, Xiaokai Zhu, Te Chen, Guowei Dou   +3 more
doaj   +1 more source

Sustainability Assessment of Micro, Small, and Medium Enterprises: A Systematic Review and Hybrid Architecture for Credible, Salient, and Legitimate Knowledge Governance

Corporate Social Responsibility and Environmental Management, EarlyView.
ABSTRACT Sustainability assessment advances corporate social responsibility toward inclusive development. Widely recognized approaches prove inadequate for micro, small, and medium enterprises (MSMEs), resulting in fragmented proliferation that hinders cumulative knowledge.
Luísa Couto Gonçalves de Souza, Laura Proença Guimarães, Maria Auxiliadora Drumond   +2 more
wiley   +1 more source

New Wavelets Collocation Method for Solving Second-Order Multipoint Boundary Value Problems Using Chebyshev Polynomials of Third and Fourth Kinds

Abstract and Applied Analysis, 2013
This paper is concerned with introducing two wavelets collocation algorithms for solving linear and nonlinear multipoint boundary value problems. The principal idea for obtaining spectral numerical solutions for such equations is employing third- and ...
W. M. Abd-Elhameed, E. H. Doha, Y. H. Youssri   +2 more
doaj   +1 more source

A Collocation-Based Multi-Configuration Time-Dependent Hartree Method Using Mode Combination and Improved Relaxation [PDF]

, 2020
Although very useful, the original multi-configuration time-dependent Hartree (MCTDH) method has two weaknesses: (1) its cost scales exponentially with the number of atoms in the system; (2) the standard MCTDH implementation requires that the PES be in ...
Robert, Wodraszka, Tucker, Carrington
core   +1 more source

Thresholds: The metaphorical foundations of powerful knowledge

The Curriculum Journal, EarlyView.
Abstract This paper advances a theoretical account of threshold concepts as metaphorical‐relational structures that reorganise meaning across contexts. Building on conceptual metaphor theory, we propose that threshold concepts can be understood as sites of schema‐level reorganisation: deep, embodied patterns of relational logic that scaffold abstract ...
Maria Karrol, Elizaveta Lyssova‐Golomzina   +1 more
wiley   +1 more source

Construction of Fractional Pseudospectral Differentiation Matrices with Applications

Axioms
Differentiation matrices are an important tool in the implementation of the spectral collocation method to solve various types of problems involving differential operators.
Wenbin Li, Hongjun Ma, Tinggang Zhao
doaj   +1 more source

A New Numerical Algorithm for Solving a Class of Fractional Advection-Dispersion Equation with Variable Coefficients Using Jacobi Polynomials

Abstract and Applied Analysis, 2013
We propose Jacobi-Gauss-Lobatto collocation approximation for the numerical solution of a class of fractional-in-space advection-dispersion equation with variable coefficients based on Caputo derivative.
A. H. Bhrawy
doaj   +1 more source