Most cited papers (RSCI)

281. Iakushkin O.O., Degtyarev A.B., Shvemberger S.V.
     Decomposition of the modeling task of some objects of archeological research for processing in a distributed computer system
     Computer Research and Modeling, 2015, v. 7, no. 3, pp. 533-537

     Although each task of recreating artifacts is truly unique, the modeling process for façades, foundations and building elements can be parametrized. This paper is focused on a complex of the existing programming libraries and solutions that need to be united into a single computer system to solve such a task. An algorithm of generating 3D filling of objects under reconstruction is presented. The solution architecture necessary for the system's adaptation for a cloud environment is studied.

     Keywords: distributed systems, cloud computing, modeling, reconstructions, service application architecture.
     Views (last year): 1. Citations: 2 (RSCI).
282. Sukhoroslov O.V., Rubtsov A.O., Volkov S.Yu.
     Development of distributed computing applications and services with Everest cloud platform
     Computer Research and Modeling, 2015, v. 7, no. 3, pp. 593-599

     The use of service-oriented approach in scientific domains can increase research productivity by enabling sharing, publication and reuse of computing applications, as well as automation of scientific workflows. Everest is a cloud platform that enables researchers with minimal skills to publish and use scientific applications as services. In contrast to existing solutions, Everest executes applications on external resources attached by users, implements flexible binding of resources to applications and supports programmatic access to the platform's functionality. The paper presents current state of the platform, recent developments and remaining challenges.

     Keywords: distributed computing, cloud platform, web services, REST, integration of computing resources, application composition.
     Views (last year): 6. Citations: 2 (RSCI).
283. Smirnov S.A., Voloshinov V.V.
     Pre-decomposition of discrete optimization problems to speed up the branch and bound method in a distributed computing environment
     Computer Research and Modeling, 2015, v. 7, no. 3, pp. 719-725

     The paper presents an implementation of branch and bound algorithm employing coarse grained parallelism. The system is based on CBC (COIN-OR branch and cut) open-source MIP solver and inter-process communication capabilities of Erlang. Numerical results show noticeable speedup in comparison to single-threaded CBC instance.

     Keywords: branch and bound algorithm, coarse grained parallelism.
     Views (last year): 2. Citations: 2 (RSCI).
284. Ershov N.M., Popova N.N.
     Natural models of parallel computations
     Computer Research and Modeling, 2015, v. 7, no. 3, pp. 781-785

     Course “Natural models of parallel computing”, given for senior students of the Faculty of Computational Mathematics and Cybernetics, Moscow State University, is devoted to the issues of supercomputer implementation of natural computational models and is, in fact, an introduction to the theory of natural computing, a relatively new branch of science, formed at the intersection of mathematics, computer science and natural sciences (especially biology). Topics of the natural computing include both already classic subjects such as cellular automata, and relatively new, introduced in the last 10–20 years, such as swarm intelligence. Despite its biological origin, all these models are widely applied in the fields related to computer data processing. Research in the field of natural computing is closely related to issues and technology of parallel computing. Presentation of theoretical material of the course is accompanied by a consideration of the possible schemes for parallel computing, in the practical part of the course it is supposed to perform by the students a software implementation using MPI technology and numerical experiments to investigate the effectiveness of the chosen schemes of parallel computing.

     Keywords: natural computing, evolutionary algorithms, artificial life.
     Views (last year): 17. Citations: 2 (RSCI).
285. Novikov O.A., Rovenska O.G.
     Approximation of classes of Poisson integrals by Fejer sums
     Computer Research and Modeling, 2015, v. 7, no. 4, pp. 813-819

     We obtain asymptotic formula for upper bounds of deviations of Fejer sums on classes of Poisson integrals. Under certain conditions, formula guarantee the solvability of the Kolmogorov–Nikol’skiy problem for Fejer sums and classes of Poisson integrals.

     Keywords: Fourier series, Kolmogorov–Nikol’skiy problem, class of Poisson integrals.
     Views (last year): 4. Citations: 2 (RSCI).
286. Zhukov B.A., Shchukina N.A.
     The approximate model of plane static problems of the nonlinear elasticity theory
     Computer Research and Modeling, 2015, v. 7, no. 4, pp. 889-896

     This article is dedicated to the construction of the approximate mathematical model of the nonlinear elasticity theory for plane strain state. The third order effects method applied to symbolic computing. There three boundary value problems for the first, the second and the third order effects has been obtained within this method, which gets ability to use well-elaborated methods of the linear elasticity theory for the solution of specific problems. This method can be applied for analytical solving of plane problems of nonlinear elasticity theory of stress concentration around holes in mathematical package Maple. Considered example of the triangular hole. The influence of external loads on the stress concentration factor.

     Keywords: nonlinear elasticity theory, the third order effects, an approximate mathematical model, the stress concentration factor.
     Views (last year): 4. Citations: 2 (RSCI).
287. Krat Y.G., Potapov I.I.
     Bottom stability in closed conduits
     Computer Research and Modeling, 2015, v. 7, no. 5, pp. 1061-1068

     In this paper on the basis of the riverbed model proposed earlier the one-dimensional stability problem of closed flow channel with sandy bed is solved. The feature of the investigated problem is used original equation of riverbed deformations, which takes into account the influence of mechanical and granulometric bed material characteristics and the bed slope when riverbed analyzing. Another feature of the discussed problem is the consideration together with shear stress influence normal stress influence when investigating the riverbed instability. The analytical dependence determined the wave length of fast-growing bed perturbations is obtained from the solution of the sandy bed stability problem for closed flow channel. The analysis of the obtained analytical dependence is performed. It is shown that the obtained dependence generalizes the row of well-known empirical formulas: Coleman, Shulyak and Bagnold. The structure of the obtained analytical dependence denotes the existence of two hydrodynamic regimes characterized by the Froude number, at which the bed perturbations growth can strongly or weakly depend on the Froude number. Considering a natural stochasticity of the waves movement process and the presence of a definition domain of the solution with a weak dependence on the Froude numbers it can be concluded that the experimental observation of the of the bed waves movement development should lead to the data acquisition with a significant dispersion and it occurs in reality.

     Keywords: bed stability, closed conduit, bed perturbations.
     Views (last year): 1. Citations: 2 (RSCI).
288. Okhapkina E.P., Okhapkin V.P.
     Approaches to a social network groups clustering
     Computer Research and Modeling, 2015, v. 7, no. 5, pp. 1127-1139

     The research is devoted to the problem of the use of social networks as a tool of the illegal activity and as a source of information that could be dangerous to society. The article presents the structure of the multiagent system with which a social network groups could be clustered according to the criteria uniquely defines a group as a destructive. The agents’ of the system clustering algorithm is described.

     Keywords: multi-agent system, cluster analysis, system interaction, security.
     Views (last year): 8. Citations: 2 (RSCI).
289. Alekseenko A.E., Kholodov Y.A., Kholodov A.S., Goreva A.I., Vasilev M.O., Chekhovich Y.V., Mishin V.D., Starozhilets V.M.
     Development, calibration and verification of mathematical model for multilane urban road traffic flow. Part I
     Computer Research and Modeling, 2015, v. 7, no. 6, pp. 1185-1203

     In this paper, we propose the unified procedure for the development and calibration of mathematical model for multilane urban road traffic flow. We use macroscopic approach, describing traffic flow with the system of second-order nonlinear hyperbolic equations (for traffic density and velocity). We close the resulting model with the equation of vehicle flow as a function of density, obtained empirically for each segment of road network using data from traffic detectors and vehicles’ GPS tracks. We verify the developed new model and calibration methods by using it to model segment of Moscows Ring Road.

     Keywords: traffic flow modeling, fundamental diagram, second-order hydrodynamic models.
     Views (last year): 4. Citations: 2 (RSCI).
290. Orlova E.V.
     Model for economic interests agreement in duopoly’s making price decisions
     Computer Research and Modeling, 2015, v. 7, no. 6, pp. 1309-1329

     The model of market pricing in duopoly describing the prices dynamics as a two-dimensional map is presented. It is shown that the fixed point of the map coincides with the local Nash-equilibrium price in duopoly game. There have been numerically identified a bifurcation of the fixed point, shown the scheme of transition from periodic to chaotic mode through a doubling period. To ensure the sustainability of local Nashequilibrium price the controlling chaos mechanism has been proposed. This mechanism allows to harmonize the economic interests of the firms and to form the balanced pricing policy.

     Keywords: two-dimensional map, stability of fixed point, bifurcation analysis, price competition, control of market prices, strategic interaction of firms, Nash-equilibrium.
     Views (last year): 10. Citations: 2 (RSCI).

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