Results 11 to 20 of about 259,102 (312)

Solution of a two-dimensional parabolic model problem in a degenerate angular domain [PDF]

open access: yesҚарағанды университетінің хабаршысы. Математика сериясы, 2023
In this paper, the boundary value problem of heat conduction in a domain was considered, boundary of which changes with time, as well as there is no the problem solution domain at the initial time, that is, it degenerates into a point.
M.I. Ramazanov   +2 more
doaj   +2 more sources

An IGA based domain integral method for the evaluation of the J-integral using the singular patch method

open access: yesMechanical Engineering Journal, 2022
In this paper, a domain integral method to evaluate the J-integral along with a singular patch method for three-dimensional linear elastic fracture mechanics analyses using Isogeometric analysis (IGA) are presented.
Omar TABAZA   +2 more
doaj   +1 more source

On the uniqueness of linear convection–diffusion equations with integral boundary conditions

open access: yesComptes Rendus. Mathématique, 2023
We investigate a class of convection–diffusion equations in an expanding domain involving a parameter, where we consider integral boundary conditions that depend non-locally on unknown solutions.
Lee, Chiun-Chang   +2 more
doaj   +1 more source

An accelerated hybrid TLM-IE method for the investigation of shielding effectiveness [PDF]

open access: yesAdvances in Radio Science, 2010
A hybrid numerical technique combining time-domain integral equations (TD-IE) with the transmission line matrix (TLM) method is presented for the efficient modeling of transient wave phenomena.
N. Fichtner, P. Russer
doaj   +1 more source

Integrally Closed Subrings of an Integral Domain [PDF]

open access: yesTransactions of the American Mathematical Society, 1971
Let D be an integral domain with identity having quotient field K. This paper gives necessary and sufficient conditions on D in order that each integrally closed subring of D should belong to some subclass of the class of integrally closed domains; some of the subclasses considered are the completely integrally closed domains, Prufer domains, and ...
Gilmer, R., Mott, J.
openaire   +2 more sources

A new closed-form formula for calculating a weakly singular static potential integral with linear current source distribution on a triangle [PDF]

open access: yesBulletin of the Polish Academy of Sciences: Technical Sciences, 2023
The article presents a closed-form formula for solving a weakly singular surface integral with a linear current source distribution associated with the SIE-MoM formulation used for solving electromagnetic (EM) problems.
Anna Grytsko, Piotr Słobodzian
doaj   +1 more source

Variation characteristics of dissolved organic matter(DOM) in coal-to-liquids wastewater during biological treatment process

open access: yes矿业科学学报, 2018
The anaerobic/aerobic(A/O) treatment process was an important process for linking pre-treatment and deep treatment of coal-to-liquids(CTL) wastewater.Therefore, in this study, the variation characteristic of DOM in A/O treatment process of CTL wastewater
Peng Siwei, Dai Ziyu, He Xuwen
doaj   +1 more source

Localized boundary-domain integral equation formulation for mixed type problems [PDF]

open access: yes, 2010
Copyright @ 2010 Walter de Gruyter GmbHSome modified direct localized boundary-domain integral equations (LBDIEs) systems associated with the mixed boundary value problem (BVP) for a scalar “Laplace” PDE with variable coefficient are formulated and ...
Mikhailov, SE   +5 more
core   +1 more source

The w-integral closure of integral domains

open access: yesJournal of Algebra, 2006
Let \(D\) be an integral domain with quotient field qf\((D)=K\). Recall that an element \(x \in K\) is called \(w\)-integral [respectively: pseudo-integral (or \(v\)-integral)] on \(D\) if \( xI^w \subseteq I^w\) [respectively: \(xI^v \subseteq I^v\)] for some nonzero finitely generated ideal \(I\) of \(D\). The authors denote by \(D^w\) [respectively:
Chang, Gyu Whan, Zafrullah, Muhammad
openaire   +3 more sources

Analysis of direct segregated boundary-domain integral equations for variable-coefficient mixed bvps in exterior domains [PDF]

open access: yes, 2013
This is the post-print version of the Article. The official published version can be accessed from the link below - Copyright @ 2013 World Scientific Publishing.Direct segregated systems of boundary-domain integral equations are formulated for the mixed (
Mikhailov, SE   +2 more
core   +1 more source

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