Papers by Sergei Nemnyugin
2020 2nd International Conference on Control Systems, Mathematical Modeling, Automation and Energy Efficiency (SUMMA), 2020
Model of social-economic phenomena based on solid-state Ising model is formulated and used for co... more Model of social-economic phenomena based on solid-state Ising model is formulated and used for computer simulation. The model is based on the lattice model of ferromagnetic or antiferromagnetic matter but takes deal with social phenomena. Set of agents of social-economic interaction is introduced into consideration. Agents take decision about participation in some sort of activity at discrete moments of time. The decision may lead to profit or to loss. It depends on previous history of the social-economic system. Dynamics of a system is defined by stochastic Markov process. Stochastic nature of the process is influenced by external and individual factors. The model is formulated algorithmically as a sequence of steps and is studied by means of computer simulation. Numerical results are given.
Problem of the optimal parameters choice for the charged particles beam is considered. It is supp... more Problem of the optimal parameters choice for the charged particles beam is considered. It is supposed that the beam is characterized by the set of quality characteristics and may be controlled by multiple parameters. It is assumed that in general case choice of the control parameters that is optimal for all criteria is not possible. In the article the optimization problem is formulated as the conflict control problem. The case is considered when parameters that should be optimized form the vector. Two cases are under consideration. In the first one fully optimal solution may be found. In the second case finding of the compromise solution is considered. Computing algorithms are proposed. INTRODUCTION The charged particles beams are used in different areas of technics, science, medicine etc. Accurate adjustment of the beam characteristics often plays crucial role in producing final results of a target irradiation. There are different approaches to the optimization of the beam paramete...
Proceedings of the 8th Joint EPS …, 1996
Computing in Economics and Finance 1996, 1996
In this paper we shall construct two classes of single-sector stochastic models of economics with... more In this paper we shall construct two classes of single-sector stochastic models of economics with perfect competition. The rst one is created by inclusion of the stochastic evolution of exogenous variables into the well known deterministic model. The perfect ...
Theoretical and Mathematical Physics, 1996
Few-Body Systems, 1993
ABSTRACT We elaborate on the role of the Green's function Monte-Carlo method in connectio... more ABSTRACT We elaborate on the role of the Green's function Monte-Carlo method in connection with quantum few-body systems and their computational treatment algorithms for calculation of bound-state properties are presented. We report results obtained from Green's function Monte-Carlo calculations both of ground-state properties of the mesic moleculesdt,dd, andpd as well as of excited states of the three-dimensional anharmonic oscillator and thedt molecule.
Computer Physics Communications, 1996
In this paper we report the results of the Green Function Monte Carlo calculation of ground state... more In this paper we report the results of the Green Function Monte Carlo calculation of ground state parameters for a wide set of muonic molecules. Properties of muonic molecules attract a lot of attention due to several reasons. The main one is related to the hope on efficiency of muon catalyzed thermonuclear fusion. The ground state energy, sticking probability for dt/x, pd/x and dd/z molecules have been estimated. Also more exotic complexes including light nuclei 3He and 4He were considered. It was supposed that only Coulomb interactions act between particles. In all cases geometric parameters of the molecule were calculated. Graphs of ground state wave functions obtained by the GFMC make it possible to compare the structure of the bound state in different cases. Despite the yet unsolved problem of the influence of nuclear forces on the fusion characteristics, this kind of calculations help to evaluate the contribution of Coulombic interactions into the physical picture of muon catalysed fusion.
ict.edu.ru
... Nemnyugin Sergei Andreevitch, kf-mn, associate professor, Department of Computational Physics... more ... Nemnyugin Sergei Andreevitch, kf-mn, associate professor, Department of Computational Physics,. E-mail: [email protected]. Komolkin Andrei Vladimirovitch, kf-mn, Department of Quantum Magnetic Phenomena. E-mail: [email protected]. ...
Results of high-performance optimization of BmnRoot software modules are presented. The BmnRoot p... more Results of high-performance optimization of BmnRoot software modules are presented. The BmnRoot package used in the BM@N experiment of the NICA project plays a crucial role in the simulation and event reconstruction so its performance should be maximized to make the data processing efficient. Results of performance analysis on representative testcases are given and bottlenecks are localized. Most suitable approaches to BmnRoot optimization are chosen and numerical estimates of the scalability of the parallelized modules for event reconstruction are presented.
Programming model is a set of programming techniques corresponding to architecture of abstract co... more Programming model is a set of programming techniques corresponding to architecture of abstract computer intended for execution of definite class of algorithms. Programming model is based on some concept of logical organization of computer (its architecture). Variety of ...
... Or filter your current search. Aleksei Larionov. Department of Computational Physics , Sankt-... more ... Or filter your current search. Aleksei Larionov. Department of Computational Physics , Sankt-Petersburg State University , ul. ... UK PubMed Central is a service of the UKPMC Funders Group working in partnership with the European Bioinformatics Institute, University of Manchester ...
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Papers by Sergei Nemnyugin