Результаты поиска по 'computer research':
Найдено статей: 68
  1. 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.

    Views (last year): 1. Citations: 2 (RSCI).
  2. 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.

    Views (last year): 6. Citations: 2 (RSCI).
  3. Berezhnaya A.Ya., Velikhov V.E., Lazin Y.A., Lyalin I.N., Ryabinkin E.A., Tkachenko I.A.
    The Tier-1 resource center at the National Research Centre “Kurchatov Institute” for the experiments, ALICE, ATLAS and LHCb at the Large Hadron Collider (LHC)
    Computer Research and Modeling, 2015, v. 7, no. 3, pp. 621-630

    The review of the distributed computing infrastructure of the Tier-1 sites for the Alice, ATLAS, LHCb experiments at the LHC is given. The special emphasis is placed on the main tasks and services of the Tier-1 site, which operates in the Kurchatov Institute in Moscow.

    Views (last year): 2.
  4. Bogdanov A.V., Degtyreva Ya.A., Zakharchuk E.A., Tikhonova N.A., Foux V.R., Khramushin V.N.
    Interactive graphical toolkit global computer simulations in marine service operational forecasts
    Computer Research and Modeling, 2015, v. 7, no. 3, pp. 641-648

    Efficiency and completeness of the numerical simulation in oceanography and hydrometeorology are entirely determined by algorithmic features of the construction of an interactive computer simulations in the scale of the oceans with adaptive coated closed seas and coastal waters refined mathematical models, with the possibility of specifying software parallelization calculations near the concrete — the protected areas of the sea coast. An important component of the research is continuous graphical visualization techniques in the course of calculations, including those undertaken in parallel processes with shared RAM or test points on the external media. The results of computational experiments are used in the description of hydrodynamic processes near the coast, which is important in keeping the organization of sea control services and forecasting marine hazards.

    Citations: 1 (RSCI).
  5. Tishchenko V.I., Prochko A.L.
    Russian participants in BOINC-based volunteer computing projects. The activity statistics
    Computer Research and Modeling, 2015, v. 7, no. 3, pp. 727-734

    The article analyses the activity statistics of the Russian participants of volunteer computing (VC) using platform BOINC obtained by the authors. The data has been received with API BOINC and site www.boincstats.com. The script for the database was written in PHP, for data storing was used MySQL.

    The database indicators were accumulated across all Russian projects, which allowed the calculation of the indicators characterizing the behavior of the Russian participants in all projects and teams BOINC — absolute and relative number of Russian participants, their activity, the number of introduced points system, the number of participants in each of the Russian project participants, interest in the concept of the VC.

    It is shown that the position of Russia in the countries ranking is very low and is retained at the same level for 4 years. According to the authors, low activity of the Russian participants of the VC, due to individualism and the closure of Russian Internet users, as well as to a small interest in the development of fundamental science, scientific research. This, possibly due to the low-prestige as a science as a whole, as well as civil science, crowdsourcing, in particular. And, therefore, we can see insufficient dissemination of the ideas of using the mechanism of VC for research projects.

    Views (last year): 4. Citations: 4 (RSCI).
  6. Bogdanov A.V., Mareev V.V., Stepanov E.A., Panchenko M.V.
    Modeling of behavior of the option. The formulation of the problem
    Computer Research and Modeling, 2015, v. 7, no. 3, pp. 759-766

    Object of research: The creation of algorithm for mass computations of options‘ price for formation of a riskless portfolio. The method is based on the generalization of the Black–Scholes method. The task is the modeling of behavior of all options and tools for their insurance. This task is characterized by large volume of realtime complex computations that should be executed concurrently The problem of the research: depending on conditions approaches to the solution should be various. There are three methods which can be used with different conditions: the finite difference method, the path-integral approach and methods which work in conditions of trade stop. Distributed computating in these three cases is organized differently and it is necessary to involve various approaches. In addition to complexity the mathematical formulation of the problem in literature is not quite correct. There is no complete description of boundary and initial conditions and also several hypotheses of the model do not correspond to real market. It is necessary to give mathematically correct formulation of the task, and to neutralize a difference between hypotheses of the model and their prototypes in the market. For this purpose it is necessary to expand standard formulation by additional methods and develop methods of realization for each of solution branches.

    Views (last year): 2. Citations: 1 (RSCI).
  7. Degtyarev A.B., Yezhakova T.R., Khramushin V.N.
    Algorithmic construction of explicit numerical schemes and visualization of objects and processes in the computational experiment in fluid mechanics
    Computer Research and Modeling, 2015, v. 7, no. 3, pp. 767-774

    The paper discusses the design and verification stages in the development of complex numerical algorithms to create direct computational experiments in fluid mechanics. The modeling of physical fields and nonstationary processes of continuum mechanics, it is desirable to rely on strict rules of construction the numerical objects and related computational algorithms. Synthesis of adaptive the numerical objects and effective arithmetic- logic operations can serve to optimize the whole computing tasks, provided strict following and compliance with the original of the laws of fluid mechanics. The possibility of using ternary logic enables to resolve some contradictions of functional and declarative programming in the implementation of purely applied problems of mechanics. Similar design decisions lead to new numerical schemes tensor mathematics to help optimize effectiveness and validate correctness the simulation results. The most important consequence is the possibility of using interactive graphical techniques for the visualization of intermediate results of modeling, as well as managed to influence the course of computing experiment under the supervision of engineers aerohydrodynamics– researchers.

    Views (last year): 1.
  8. 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.

    Views (last year): 17. Citations: 2 (RSCI).
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International Interdisciplinary Conference "Mathematics. Computing. Education"