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27th Symposium on Nuclear Electronics and Computing, NEC 2019

作者： Kryukov, A. Bychkov, I. Mikhailov, A. Nguyen, M.-D. Shigarov, A. M.V.Lomonosov Moscow State University Skobeltsyn Institute of Nuclear Physics Leninskie gory 1 bld.2 Moscow119992 Russia Matrosov Institute for System Dynamics and Control Theory SB RAS. Lermontova 134 box 292 Irkutsk664033 Russia

Currently, a number of experimental facilities for astrophysics of cosmic rays are being built and are already operating in the world. These installations produce large amounts of data that need to be collected, processed, and analyzed. Since many organizations around the world are involved in experimental collaboration, it is necessary to organize distributed data management and processing. Moreover, the widespread use of multi-messenger approach based on the coordinated observation, interpretation and analysis of disparate signals created by different astrophysical processes makes this problem much more urgent and complex. To meet a similar challenge in high energy physics, a WLCG grid was deployed as part of the LHC project. This solution, on the one hand, showed high efficiency, and, on the other hand, it turned out to be a rather heavy solution that requires high administrative costs, highly qualified staff and a very homogeneous environment on which applications operate. The paper considers a distributed data storage, called AstroDS, which was developed for middle-size astrophysical experiments. The storage currently integrates the data of the KASCADE and TAIGA experiments;in the future, the number of supported experiments will be increased. The main ideas and approaches used in the development of this storage are as follows: unification of access to local storages without changing their internal structure;data transfer only at the moment of actual access to them;search for the requested data using metadata and aggregation of the search results into a new collection available to the user. A distinguishing feature of the system is its focus on storing of both raw data and primary processed data, for example, data after calibration, using the Write-One-Read-Many method. Adding data to local repositories is carried out through special local services that provide, among other things, semi-automatic collection of meta-information in the process of downloading of th

关键词： Metadata

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Investigation of the influence of control forces on the stability of a satellite with a gravitational stabilizer by means of computer algebra

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Journal of Automation and Information Sciences 2018年第7期50卷 35-47页

作者： Banshchikov, A.V. V.M. Matrosov Institute of Systems Dynamics and Control Theory Siberian Branch of Russian Academy of Sciences Irkutsk Russia

The problem of the influence of forces on stability with respect to equilibrium of satellite with a controlled gravitational stabilizer on the circular orbit is researched. In space of the entered parameters the domains with various degrees of instability by Poincare are found. Assuming that the potential system is unstable, the issues of the possibility of its stabilization up to asymptotic stability are considered. The parametric analysis of the obtained inequalities is carried out with the help of Mathematica built-in tools for symbolic-numerical modelling. © 2018 by Begell House Inc.

关键词： Stabilization

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The framework of the digital environment for analysing of seismic hazards of lithosphere blocks in Baikal-Mongolian region 2

The framework of the digital environment for analysing of se...

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2nd Scientific-Practical Workshop Information Technologies: Algorithms, Models, systems, ITAMS 2019

作者： Bychkov, I.V. Ruzhnikov, G.M. Paramonov, V.V. Mikhailov, A.A. Fedorov, R.K. Klyuchevskii, A.V. Dem'yanovich, V.M. Demberel, S. Matrosov Institute for System Dynamics and Control Theory SB RAS Irkutsk Russia Irkutsk Scientific Center SB RAS Irkutsk Russia Institute Mathematics Economics and Informatics of Irkutsk State University Irkutsk Russia Institute of the Earth's Crust SB RAS Irkutsk Russia Institute of Astronomy and Geophysics Mongolian Academy Ulaanbaatar Mongolia

The Baikal-Mongolian region is the territory with high seismic activity for which issues of the dynamic interaction of mobile areas with the platform block at a neotectonic stage. Also, it is a pattern of a late Cainozoic fault formation are insufficiently studied. In this regard development of methods of zoning of seismic hazard of territories, with use of modern geoinformation, web technologies and service – the oriented paradigm is relevant. The information and analytical environment (IAE) of geoportal type allowing to integrate diverse databases of monitoring and to apply services to a solution of a number of problems of comparison and assessment of the dangerous geological processes happening in the region are developed for the analysis and assessment of dangerous geological processes. At the same time can be used, both local services, and distributed in an Internet network that allows application of the models, algorithms and databases developed by other researchers. The offered approach provides a possibility of loading of heterogeneous space and thematic data of IAE, including, contained in directories and bulletins of earthquakes of the Baikal-Mongolian region. IAE allows to carry out creation of various thematic cards and also to visually represent results of modelling of geological processes and zoning of seismic hazard. Copyright © 2019 for this paper by its authors.

关键词： Zoning

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Preface

Communications in Computer and Information Science

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Communications in Computer and Information Science 2020年 1275 CCIS卷 v-vii页

作者： Kochetov, Yury Gruzdeva, Tatiana Bykadorov, Igor Sobolev Institute of Mathematics Novosibirsk Russia Matrosov Institute for System Dynamics and Control Theory Irkutsk Russia

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Probing invisible vector meson decay mode with hadronic beam in the NA64 experiment at SPS/CERN

arXiv

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arXiv 2023年

作者： Zhevlakov, Alexey S. Kirpichnikov, Dmitry V. Gninenko, Sergei N. Kuleshov, Sergey Lyubovitskij, Valery E. Bogoliubov Laboratory of Theoretical Physics Jinr Dubna141980 Russia Matrosov Institute for System Dynamics and Control Theory Sb Ras Lermontov str. 134 Irkutsk664033 Russia Institute for Nuclear Research of the Russian Academy of Sciences Moscow117312 Russia of Anid Fernández Concha 700 Santiago Chile Center for Theoretical and Experimental Particle Physics Facultad de Ciencias Exactas Universidad Andres Bello Fernandez Concha 700 Santiago Chile Institut für Theoretische Physik Universität Tübingen Kepler Center for Astro and Particle Physics Auf der Morgenstelle 14 TübingenD-72076 Germany Departamento de Física Centro Científico Tecnológico de Valparaíso-CCTVal Universidad Técnica Federico Santa María Casilla 110-V Valparaíso Chile

We test a novel idea of using a π- beam in the fixed-target experiments to search for New Physics in the events with missing energy. Bounds for invisible vector ρ meson decay were derived, analyzed, and compared with the current limits on searching Dark Matter in the accelerator based experiments. We demonstrate that the new approach can be effective tool to probe sub-GeV Dark Matter parameter space. Copyright © 2023, The Authors. All rights reserved.

关键词： Dark Matter

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The global search theory approach to the bilevel pricing problem in telecommunication networks 7th

The global search theory approach to the bilevel pricing pro...

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7th International Conference on Network Analysis, NET 2017

作者： Orlov, Andrei V. Matrosov Institute for System Dynamics and Control Theory of SB RAS Lermontov St. 134 Irkutsk664033 Russia

ISBN: (纸本)9783319962467

In this paper, we develop new methods of local and global search for finding optimistic solutions to the hierarchical problem of optimal pricing in telecommunication networks. These methods are based on the fact that a bilevel optimization problem can be equivalently represented as a nonconvex optimization problem (with the help of the Karush-Kuhn-Tucker conditions and the penalty approach). To solve the resulting nonconvex problem, we apply the Global Search theory (GST).Computational testing of the developed methods on a test problem demonstrated workability and efficiency of the approach proposed. © Springer International Publishing AG, part of Springer Nature 2018.

关键词： Optimization

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QCD Phase Diagram at NICA energies: K+/π+ horn effect and light clusters in THESEUS

arXiv

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arXiv 2020年

作者： Blaschke, D. Friesen, A.V. Ivanov, Yu.B. Kalinovsky, Yu.L. Kozhevnikova, M. Liebing, S. Radzhabov, A. Röpke, G. JINR Dubna Dubna141980 Russia Moscow115409 Russia University of Wroclaw Wroclaw50-204 Poland Matrosov Institute System Dynamics & Control Theory Irkutsk664003 Russia Irkutsk State University Irkutsk664003 Russia University of Rostock RostockD-18051 Germany

We discuss recent progress in the development of the three-fluid hydrodynamics-based program THESEUS towards an event generator suitable for applications to heavy-ion collisions at the intermediate energies of the planned NICA and FAIR experiments. We follow the strategy that modifications of particle distributions at the freeze-out surface in the QCD phase diagram may be mapped directly to the observable ones within a sudden freeze-out scheme. We report first results of these investigations for the production of light clusters (deuterons and tritons) which can be compared to experimental data from the HADES and the NA49 experiment and for the interpretation of the"horn" effect observed in the collision energy dependence of the K+/π+ ratio. Medium effects on light cluster production in the QCD phase diagram are negligible at the highest NICA energies but shall play a dominant role at the lowest energies. A sharp"horn"-type signal in the K+/π+ ratio can be obtained when the onset of Bose condensation modelled by a pion chemical potential results in an enhancement of pions at low momenta (which is seen at LHC energies) and would occur already in the NICA energy range. Copyright © 2020, The Authors. All rights reserved.

关键词： Heavy ions

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Meta-monitoring system for ensuring a fault tolerance of the intelligent high-performance computing environment 1

Meta-monitoring system for ensuring a fault tolerance of the...

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1st International Workshop on Information, Computation, and control systems for Distributed Environments, ICCS-DE 2019

作者： Sidorov, I.A. Sidorova, T.V. Kurzibova, Ya.V. Matrosov Institute for System Dynamics and Control Theory of SB RAS Lermontov St. 134 Irkutsk664033 Russia Limnological Institute of SB RAS Ulan-Batorskaya St. 3 Irkutsk664033 Russia Irkutsk State University Karl Marks St. 1 Irkutsk664003 Russia

The high-performance computing systems include a large number of hardware and software components that can cause failures. Nowadays, the well-known approaches to monitoring and ensuring the fault tolerance of the high-performance computing systems do not allow to fully implement its integrated solution. The aim of this paper is to develop methods and tools for identifying abnormal situations during large-scale computational experiments in high-performance computing environments, localizing these malfunctions, automatically troubleshooting if this is possible, and automatically reconfiguring the computing environment otherwise. The proposed approach is based on the idea of integrating monitoring systems, used in different nodes of the environment, into a unified meta-monitoring system. The use of the proposed approach minimizes the time to perform diagnostics and troubleshooting through the use of parallel operations. It also improves the resiliency of the computing environment processes by preventive measures to diagnose and troubleshoot of failures. These advantages lead to increasing the reliability and efficiency of the environment functioning. The novelty of the proposed approach is underlined by the following elements: mechanisms of the decentralized collection, storage, and processing of monitoring data;a new technique of decision-making in reconfiguring the environment;the supporting the provision of fault tolerance and reliability not only for software and hardware, but also for environment management systems. Copyright © 2019 for this paper by its authors. Use permitted under Creative Commons License Attribution 4.0 International (CC BY 4.0).

关键词： Fault tolerance

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On an exact solution to the nonlinear heat equation with a source

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Journal of Physics: Conference Series 2021年第1期1847卷

作者： A L Kazakov A A Lempert L F Spevak Matrosov Institute for system dynamics and control theory SB RAS 134 Lermontov str. 664033 Irkutsk Russia Institute of Engineering Science UB RAS 34 Komsomolskaya str. 620049 Ekaterinburg Russia

The paper is devoted to the study of a singular nonlinear second-order parabolic equation, which is called the porous medium equation or the nonlinear heat equation. One of the important classes of its solutions is heat waves propagating over a zero background with a finite velocity. This property is not typical for parabolic equations and is a consequence of singularity. The main object of study is exact solutions of mentioned type. A new way of separating variables is used to represent them. We obtain conditions when it is possible to make a reduction to the Cauchy problem for an ordinary second-order differential equation with a singularity. It is shown that the Cauchy problem describes a heat wave whose front moves exponentially. We construct a solution to the Cauchy problem as a power series and determine the cases when the series breaks off, i.e. the solution has the form of a polynomial, and the corresponding heat wave can be written explicitly. If the Cauchy problem cannot be explicitly integrated, the solution is constructed numerically. An algorithm based on the boundary element method is proposed. We perform a computational experiment and conclude the properties of the found solutions. Besides, the accuracy of the calculation results is analyzed.

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On the Analytic Solutions of a Special Boundary Value Problem for a Nonlinear Heat Equation in Polar Coordinates

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Journal of Applied and Industrial Mathematics 2018年第2期12卷 255-263页

作者： Kazakov, A.L. Kuznetsov, P.A. Matrosov Institute for System Dynamics and Control Theory ul. Lermontova 134 Irkutsk664033 Russia Irkutsk State University ul. Karla Marksa 1 Irkutsk664033 Russia

The paper addresses a nonlinear heat equation (the porous medium equation) in the case of a power-law dependence of the heat conductivity coefficient on temperature. The equation is used for describing high-temperature processes, filtration of gases and fluids, groundwater infiltration, migration of biological populations, etc. The heat waves (waves of filtration) with a finite velocity of propagation over a cold background form an important class of solutions to the equation under consideration. A special boundary value problem having solutions of such type is studied. The boundary condition of the problem is given on a sufficiently smooth closed curve with variable geometry. The new theorem of existence and uniqueness of the analytic solution is proved. © 2018, Pleiades Publishing, Ltd.

关键词： Boundary value problems

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