نتایج جستجو برای: iterative improvement methods
تعداد نتایج: 2144822 فیلتر نتایج به سال:
In this paper, we suggest and analyze some iterative methods for solving the system of nonconvex variational inequalities with two nonlinear mappings by using the projection technique. We show that the strong convergence of these iterative methods to the solutions of the system of nonconvex variational inequalities. Consequently, the results presented in this paper can be viewed as an improveme...
posed on a finite dimensional Hilbert space V ∼= R equipped with an inner product (·, ·). Here A : V 7→ V is an symmetric and positive definite (SPD) operator, f ∈ V is given, and we are looking for u ∈ V such that (1) holds. The direct method to solve (1) is to form A−1 or the action of A−1. For example, the Gaussian elimination or LU factorization still remains the most commonly used methods ...
New explicit group S.O.R. methods suitable for use on an asynchronous MIMD computer are presented for the numerical solution of the sparse linear systems derived from the discretization of two-dimensional , second-order, elliptic boundary value problems. A comparison with existing implicit line S.O.R. schemes for the Dirichlet model problem shows the new schemes to be superior (Barlow and Evans...
BACKGROUND AND PURPOSE Electrocardiogram-gated 4D-CTA is a promising technique allowing new insight into aneurysm pathophysiology and possibly improving risk prediction of cerebral aneurysms. Due to the extremely small pulsational excursions (<0.1 mm in diameter), exact segmentation of the aneurysms is of critical importance. In vitro examinations have shown improvement of the accuracy of vesse...
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