نتایج جستجو برای: posed problem in general
تعداد نتایج: 17144780 فیلتر نتایج به سال:
Boundary layer problems (Singular perturbation problems) more have been applied for ordinary differential equations. While this theory for partial differential equations have many applications in several fields of physics and engineering. Because of complexity of limit and boundary behavior of the solutions of partial differential equations these problems considered less than ordinary case. In ...
In this article we investigate the existence of a solution to a semi-linear, elliptic, partial differential equation with distributional coefficients and data. The problem we consider is a generalization of the Lichnerowicz equation that one encounters in studying the constraint equations in general relativity. Our method for solving this problem consists of solving a net of regularized, semi-l...
Dynamic MRI usually uses echo-planar imaging (EPI) [1] to achieve high temporal resolution. In brain imaging, modern MRI systems can achieve 3D spatial encoding with the whole-brain coverage using multi-slice EPI with TR of 2 s. A significant amount of time of multi-slice EPI is spent over k-space traversal. Recently, we proposed the MR inverse imaging (InI) [2] to achieve the unprecedented tem...
the present study aimed to investigate representation of discourse markers and metadiscourse markers in conversations and readings of general elt coursebook series used in the language centers of iran. to this aim, four elt coursebooks popularly taught in language centers of this country were analyzed based on fung and carter’s (2007) framework regarding discourse markers and hyland’s (2005) fr...
textbooks play a crucial role in language learning classrooms. the problem is that among the great quantity of available textbooks on the market which one is appropriate for a specific classroom and a group of learners. in order to evaluate elt textbooks, theorists and writers have offered different kinds of evaluative frameworks based on a number of principles and criteria. this study evaluate...
We investigate local and global properties of positive solutions to the fast diffusion equation ut = ∆u m in the range (d− 2)+/d < m < 1, corresponding to general nonnegative initial data. For the Cauchy problem posed in the whole Euclidean space R we prove sharp Local Positivity Estimates (Weak Harnack Inequalities) and Elliptic Harnack inequalities; we use them to derive sharp Global Positivi...
Abstract This paper describes the mathematical structure of ill-posed nonlinear inverse problem low-dose dental cone-beam computed tomography (CBCT) and explains advantages a deep learning-based approach to reconstruction images over conventional regularization methods. underlying reasons why CBCT is more than standard tomography. Despite this severe ill-posedness, demand for systems rapidly gr...
chapter one is devotod to collect some notion and background informations, which are needed in the next chapters. it also contains some important statements which will be proved in a more general context later in this thesis. in chapter two, we show that if the marginal factor-group is of order np1...pk,n>1, then we obtain a bound for the order of the verbal subgroup. also a bound for the bear-...
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