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221. "Workload balancing in GPU implementation of breadth-first search"
... Workload balancing in GPU implementation of breadth-first search" . Chernoskutov M.A., Ermakov D.G. Parallel processing of unstructured data єѓ¶Иє®¶Г¶В in a graph-like form can be a severe computational challenge because of significant overheads caused by the irregular nature of graph algorithms and the hardware latency of intensive data access. ... Keywords: breadth-first search, parallel algorithm, graphics processing units . PDF (in Russian) (315KB) . PDF. zip (in Russian) (275KB) . ...
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Ссылки http://num-meth.srcc.msu.ru/english/zhurnal/tom_2013/v14r208.html -- 3.4 Кб -- 12.02.2014
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222. "A system for the automated finding of inefficiencies and errors in parallel
... A system for the automated finding of inefficiencies and errors in parallel programs" . ... Antonov A.S., Voevodin Vad.V., Zhumatii S.A., Nikitenko D.A., Stefanov K.S., Shvets P.A. The first version of a system for the automated finding of inefficiencies and errors in parallel programs is considered. The developed algorithms devoted for the automated finding of logic and semantic errors in MPI parallel programs are implemented in this system. ...
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Ссылки http://num-meth.srcc.msu.ru/english/zhurnal/tom_2013/v14r207.html -- 3.9 Кб -- 12.02.2014
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223. "A parallel sweep method for hybrid supercomputers"
... A parallel sweep method for hybrid supercomputers" . Bykov A.N., Erofeev A.M., Sizov E.A., Fedorov A.A. An approach to parallelize the sweep method on hybrid computers using accelerators is considered. ... Bykov A.N., e-mail: ban3101@mail.ru ; Erofeev A.M., e-mail: amekrym@gmail.com ; Sizov E.A., e-mail: sizove@mail.ru ; Fedorov A.A., e-mail: fedoroffaa1@rambler.ru тАУ Russian Federal Nuclear Center, All-Russian Research Institute of Experimental Physics; prospekt Mira 37, Sarov, 607190, Russia ...
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Ссылки http://num-meth.srcc.msu.ru/english/zhurnal/tom_2013/v14r206.html -- 2.9 Кб -- 12.02.2014
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224. "Synchronization of gigapixel video streams on video walls"
... Synchronization of gigapixel video streams on video walls" . Drizhuk D.D., Poyda A.A., Godunov A.I. An approach and its software implementation for the visualization of video streams on multidisplay video walls of high resolution are described. ... Drizhuk D.D., e-mail: argentum_no3@bk.ru ; Poyda A.A., e-mail: Poyda_AA@nrcki.ru ; Godunov A.I., e-mail: alex.i.godunov@gmail.com тАУ Kurchatov Institute National Research Centre; ploshchad Kurchatova 1, Moscow, 123182, Russia ...
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Ссылки http://num-meth.srcc.msu.ru/english/zhurnal/tom_2013/v14r205.html -- 2.8 Кб -- 12.02.2014
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225. "Parallel algorithms of solving the Poisson equation using oblique cross grids
... Parallel algorithms of solving the Poisson equation using oblique cross grids in backward-facing step domains" . ... The paper suggests a parallel implementation of the fictitious domain method for the Poisson equation in a three-dimensional backward-facing step domain. This method is based on the parallel realization of a fast algorithm for solving the Poisson equation in a parallelepiped. Some standard methods of solving this equation on the basis of the PETSc package are also considered. ...
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Ссылки http://num-meth.srcc.msu.ru/english/zhurnal/tom_2013/v14r203.html -- 3.2 Кб -- 12.02.2014
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226. "Automating the location of errors and inefficiencies in parallel programs"
... Automating the location of errors and inefficiencies in parallel programs" . ... There are various ways for the automation of efficiency analysis and location of errors in parallel applications. A complex approach to the efficiency study of application runs is proposed in this paper. ... Keywords: supercomputer, performance, efficiency study, parallel computing, parallel programs, dynamic program characteristics, high performance computing, profiling, monitoring, supercomputer center . ...
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Ссылки http://num-meth.srcc.msu.ru/english/zhurnal/tom_2013/v14r202.html -- 3.7 Кб -- 12.02.2014
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227. "Heuristic algorithms of mapping MPI-programs onto multicluster computer and
... Heuristic algorithms of mapping MPI-programs onto multicluster computer and GRID systems" . Kurnosov M.G., Paznikov A.A. On the basis of graph partitioning, a method and heuristic algorithms of mapping the parallel programs onto distributed computer systems with hierarchical structure are proposed. ... Some results of mapping the MPI-programs taken from the benchmark suites SPEC MPI and NAS Parallel Benchmarks onto a geographically-distributed multicluster computer system are discussed. ...
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Ссылки http://num-meth.srcc.msu.ru/english/zhurnal/tom_2013/v14r201.html -- 3.7 Кб -- 12.02.2014
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228. "A multigrid algorithm for the fan-beam ROI-tomography of contrast objects"
... A multigrid algorithm for the fan-beam ROI-tomography of contrast objects" . ... Keywords: ROI-tomography, fan-beam tomography, iterative algorithms, multigrid algorithms . PDF (in Russian) (4.13MB) . ... Head of Laboratory, e-mail: ivan.science@gmail.com ; Vologin D.A., engieneer, e-mail: ivan.science@gmail.com ; тАУ Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of Russian Academy of Sciences; prospect Koptyuga 3, Novosibirsk, 630090, Russia; . ...
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Ссылки http://num-meth.srcc.msu.ru/english/zhurnal/tom_2013/v14r161.html -- 3.4 Кб -- 12.02.2014
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229. "Applicability of stratified models for solving problems of three-dimensional
... Applicability of stratified models for solving problems of three-dimensional ultrasonic tomography" . ... The paper is devoted to carrying out mathematical modeling in very large scale problems of propagation of ultrasonic waves in the diagnosis of three-dimensional physical environments on supercomputers. ... This approach is ideal for X-ray tomography. ... Keywords: coefficient inverse problems, wave equation, supercomputer modeling, ultrasonic 3D tomography, parallel computing . ...
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Ссылки http://num-meth.srcc.msu.ru/english/zhurnal/tom_2013/v14r160.html -- 3.9 Кб -- 12.02.2014
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230. "A lattice Boltzmann scheme for computing on unstructured meshes"
... A lattice Boltzmann scheme for computing on unstructured meshes" . Krivovichev G.V. A lattice Boltzmann scheme for computing on unstructured meshes is proposed. The scheme is based on the finite element method with Galerkin approximation. A program realization of the scheme is implemented with the use of the freefem++ v. 3.20 package. ... Keywords: lattice Boltzmann method, unstructured meshes, finite element method . ...
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Ссылки http://num-meth.srcc.msu.ru/english/zhurnal/tom_2013/v14r159.html -- 2.9 Кб -- 12.02.2014
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231. "An implicit finite-difference scheme for the unsteady motion of a viscous
... An implicit finite-difference scheme for the unsteady motion of a viscous barotropic gas" . Popov A.V., Zhukov K.A. A new implicit finite-difference scheme for the unsteady motion of a viscous barotropic gas is proposed in terms of Eulerian coordinates for the cases of one, two, and three spatial variables. ... An important property of the scheme is the fact that the grid density function is always positive. ... Keywords: finite-difference scheme, error of numerical solution, viscous gas . ...
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Ссылки http://num-meth.srcc.msu.ru/english/zhurnal/tom_2013/v14r158.html -- 3.3 Кб -- 12.02.2014
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232. "Minimization of the residual functional in problems of stream experimental
... Minimization of the residual functional in problems of stream experimental data processing" . Shpynev B.G., Voronov A.L. We consider the problem of residual functional minimization that arises in the case of long experimental data series processing when the measured process is described by nonlinear integro-differential or integral equations. ... Keywords: nonlinear integro-differential equations, descent algorithm, regularization, genetic algorithm . ...
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Ссылки http://num-meth.srcc.msu.ru/english/zhurnal/tom_2013/v14r157.html -- 3.4 Кб -- 12.02.2014
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233. "Diagonal constructions in an N -cube"
... Diagonal constructions in an N -cube" . Ryabov G.G., Serov V.A. An extension of the constructive world of cubical structures is considered on the basis of a bijective mapping of k -dimensional faces for an n -cube into words over a finite alphabet. In essence, this extension realizes symbolic computing and is intended for the representations of diagonal constructions in an n -cube and operations over them. ...
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Ссылки http://num-meth.srcc.msu.ru/english/zhurnal/tom_2013/v14r156.html -- 2.8 Кб -- 12.02.2014
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234. "Acceleration of molecular dynamics simulations using the fast multipole method
... Acceleration of molecular dynamics simulations using the fast multipole method and graphics processing units" . ... High-performance computations are achieved via the fast multipole method (FMM) for force calculation and the use of heterogeneous architectures, consisting of central and graphics processing units (CPU and GPU, respectively). ... Keywords: molecular dynamics, electrostatic interaction, fast multipole method, FMM, heterogeneous computations, GPU . ...
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Ссылки http://num-meth.srcc.msu.ru/english/zhurnal/tom_2013/v14r155.html -- 4.2 Кб -- 12.02.2014
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235. "Using Lagrange principle for solving linear ill-posed problems with a priori
... Using Lagrange principle for solving linear ill-posed problems with a priori information" . ... Using the method of extending compacts, the Lagrange principle and the optimal recovery theory, we propose a method for constructing an optimal regularization algorithm for solving linear ill-posed problems with sourcewise representable solutions and a method of calculating the corresponding optimal worst a posteriori error estimate of the proposed method. ...
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Ссылки http://num-meth.srcc.msu.ru/english/zhurnal/tom_2013/v14r154.html -- 3.2 Кб -- 12.02.2014
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236. "A family of quadrature formulas for solving boundary integral equations"
... A family of quadrature formulas for solving boundary integral equations" . Arushanyan I.O. A family of exponentially convergent quadrature formulas is proposed for a class of functions with weak singularity. The results obtained are used to solve the boundary integral equations of harmonic potential theory in domains with corner points. Keywords: double-layer potential, integral equations, corner points, condensing grids, quadrature method . ...
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Ссылки http://num-meth.srcc.msu.ru/english/zhurnal/tom_2013/v14r153.html -- 2.6 Кб -- 12.02.2014
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237. "Computation of two-dimensional flows using multilevel meshes"
... Computation of two-dimensional flows using multilevel meshes" . Gubaidullin D.A., Osipov P.P. For two-dimensional problems of perfect gas dynamics, a special form of equations consisting of conservation laws for directed invariants is proposed. Based on these equations, a number of schemes for computing gas flows using multilevel meshes are developed. ... Keywords: irregular grids, Riemann invariants, AMR (Automated Mesh Refinement) . PDF (in Russian) (410KB) . ...
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Ссылки http://num-meth.srcc.msu.ru/english/zhurnal/tom_2013/v14r152.html -- 3.1 Кб -- 12.02.2014
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238. "Three-dimensional simulation of the dynamics of deformable droplets of an
... Three-dimensional simulation of the dynamics of deformable droplets of an emulsion using the boundary element method and the fast multipole method on heterogeneous computing systems" . ... An efficient approach to simulate the dynamics of a large number of deformable droplets is proposed. ... Keywords: deformable droplets, Stokes equations, boundary element method, fast multipole method, parallel computing, graphics processors . ...
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Ссылки http://num-meth.srcc.msu.ru/english/zhurnal/tom_2013/v14r151.html -- 4.2 Кб -- 12.02.2014
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239. "The coherent control of relaxation processes in excited states of
... The coherent control of relaxation processes in excited states of 4-dimethylaminochalkone fluorescent probe. Results of quantum chemical simulation." ... These results can help to explain the experimental data on the possibility of coherent control of excited state relaxation for a solvated N,N-dimethylaminochalcone molecule. Keywords: quantum chemical simulation, nonadiabatic molecular dynamics, TDDFT, fluorescent probe, coherent control, nonradiative relaxation . ...
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Ссылки http://num-meth.srcc.msu.ru/english/zhurnal/tom_2013/v14r150.html -- 4.2 Кб -- 12.02.2014
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240. "Measuring the phase shifts of quasi-harmonic signals"
... Measuring the phase shifts of quasi-harmonic signals" . Ignat'ev V.K., Nikitin A.V., Yushanov S.V. A high-precision digital method of measuring the phase shifts is proposed for the signals whose parameters vary slowly over the time period equal to the discretization period but are able to change significantly over the entire measurement interval. Keywords: slowly varying parameters, least-squares method, phase shift, Taylor series . ...
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Ссылки http://num-meth.srcc.msu.ru/english/zhurnal/tom_2013/v14r149.html -- 2.7 Кб -- 12.02.2014
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