Numerical scheme for singularly perturbed Fredholm integro-differential equations with non-local boundary conditionsSpringer Science and Business Media LLC - - 2024
Lolugu Govindarao, Higinio Ramos, Sekar Elango
This paper solves a class of Fredholm integro-differential equations involving a small parameter with integral boundary conditions numerically. The solution to the problem possesses boundary layers at both end boundaries. A central difference scheme is used for approximating the derivatives. In contrast, the trapezoidal rule is used for the integral term, provided an appropriately adapted mesh is ...... hiện toàn bộ
Piezoelectric sensor location by the observability Gramian maximization using topology optimizationSpringer Science and Business Media LLC - Tập 37 - Trang 237-252 - 2017
Odair Menuzzi, Jun S. O. Fonseca, Eduardo A. Perondi, Juliano F. Gonçalves, Eduardo Padoin, Otávio A. A. Silveira
This work presents an optimal design methodology for piezoelectric material positioning in structures aiming at vibration measurements. The main objective is to find the optimal location of piezoelectric sensors using a suitable topology optimization strategy. The sensors location is determined by an optimization formulation that defines where the material should have piezoelectric properties. The...... hiện toàn bộ
Digitizations associated with several types of digital topological approachesSpringer Science and Business Media LLC - Tập 36 - Trang 571-597 - 2015
Jeong Min Kang, Sang-Eon Han, Kyung Chan Min
When digitizing subspaces in the Euclidean subspace in a certain digital topological approach, we are strongly required to preserve topological properties of the given spaces such as connectedness. Thus the present paper studies four kinds of local rules associated with lower limit, upper limit, Khalimsky and Marcus Wyse (for short, L-, U-, K- and M-, respectively) topologies which are used for L-...... hiện toàn bộ
A high order convergent adaptive numerical method for singularly perturbed nonlinear systemsSpringer Science and Business Media LLC - Tập 41 - Trang 1-16 - 2022
Sumit, Shashikant Kumar, Sunil Kumar
In this work, we develop a high order convergent adaptive numerical method for a system of first-order singularly perturbed nonlinear differential equations with distinct perturbation parameters. The problem is discretized by a hybrid finite difference scheme for which a posteriori error estimate in the maximum norm is derived. The layer-adapted meshes are generated using equidistribution of the m...... hiện toàn bộ
An efficient numerical algorithm for solving nonlinear fractional Volterra integro-differential equationSpringer Science and Business Media LLC - Tập 43 - Trang 1-21 - 2024
Xuefei Dai, Chaoyue Guan, Jing Niu
The goal of this paper is to contribute a firm and outstanding program to nonlinear fractional Volterra integro-differential equations with the initial value problem on the basis of the reproducing kernel method (RKM). To a certain extent, the difficulty of preserving memory of fractional differential operators is reduced. At the beginning, the model can be converted to the equivalent fractional V...... hiện toàn bộ