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4th International Conference on Information Technology and Nanotechnology - Session: Data Science, DS-ITNT 2018

作者： Bychkov, I.V. Feoktistov, A.G. Sidorov, I.A. Edelev, A.V. Gorsky, S.A. Kostromin, R.O. Matrosov Institute for System Dynamics and Control Theory SB RAS Lermontov St. 134 Irkutsk664033 Russia Melentiev Energy Systems Institute Lermontov St. 130 Irkutsk664033 Russia

We address the relevant problem of machine learning in a multi-agent system for distributed computing management. We propose a new approach to the agent learning in the system for managing job flows of scalable applications in a heterogeneous distributed computing environment, which includes high-performance computing clusters, as its main components. We manage parameter sweep applications that execute their jobs in a virtual machine environment. We use the specialized tools to implement such environment. In contrast to the known approaches, our approach is based on the integrated applying of methods for job classification and parameter adjustment of algorithms for functioning agents. Simulation modeling the environment allows eliciting the necessary knowledge for parameter adjustment. During the learning of agents, we use the expert knowledge of environment node administrators. An example of solving the complex practical problem that relates to studying energy development directions of Russia demonstrates advantages of the proposed approach. © 2018 CEUR-WS. All rights reserved.

关键词： Multi agent systems

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Using automatic generation of relaxation constraints to improve the preimage attack on 39-step md4

arXiv

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arXiv 2018年

作者： Gribanova, Irina Semenov, Alexander Matrosov Institute for System Dynamics and Control Theory Sb Ras Irkutsk Russia

IN this paper we construct preimage attack on the truncated variant of the MD4 hash function. Specifically, we study the MD4-39 function defined by the first 39 steps of the MD4 algorithm. We suggest a new attack on MD4-39, which develops the ideas proposed by H. Dobbertin in 1998. Namely, the special relaxation constraints are introduced in order to simplify the equations corresponding to the problem of finding a preimage for an arbitrary MD4-39 hash value. The equations supplemented with the relaxation constraints are then reduced to the Boolean Satisfiability Problem (SAT) and solved using the state-of-the-art SAT solvers. We show that the effectiveness of a set of relaxation constraints can be evaluated using the black-box function of a special kind. Thus, we suggest automatic method of relaxation constraints generation by applying the black-box optimization to this function. The proposed method made it possible to find new relaxation constraints that contribute to a SAT-based preimage attack on MD4-39 which significantly outperforms the competition. Copyright © 2018, The Authors. All rights reserved.

关键词： Hash functions

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Numerical-analytical algorithms for nonlinear optimal control problems on a large time interval 1

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14th International Conference on Dynamical systems: theory and Applications, DSTA 2017

作者： Danik, Yulia Dmitriev, Mikhail Makarov, Dmitry Zarodnyuk, Tatiana pr. 60-letiya Oktyabrya 9 Moscow117312 Russia Matrosov Institute for System Dynamics and Control Theory SB RAS Lermontova str. 134 Irkutsk664033 Russia

ISBN: (数字)9783319965987

ISBN: (纸本)9783319965970

Some nonlinear and discrete optimal control problems with phase constraints on a fixed but sufficiently large time interval are considered as singularly perturbed problems. In continuous-time case the state equations are reduced to singularly perturbed equations on a finite time interval and, in discrete-time case, the state equations have the form of systems with a small step. Using the technique for singularly perturbed systems, the formal asymptotic expansions by the corresponding small parameter are constructed which contain the structural information about the solution. That is usually sufficient for most applications to obtain an initial approximation to control in the global optimum neighborhood. The obtained algorithms can be applied to mathematical economics and technical objects control problems with phase and control constraints, and with turnpike effects in the trajectories, where the turnpike trajectories can be discontinuous. The use of traditional algorithms for these problems is inefficient due to the large increase of computational difficulty. © Springer International Publishing AG, part of Springer Nature 2018.

关键词： Trajectories

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Approximation results for impulsive control systems with hysteresis

Approximation results for impulsive control systems with hys...

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International Conference on Stability and Oscillations of Nonlinear control systems (Pyatnitskiy's Conference)

作者： O. N. Samsonyuk D. E. Tolkachev Matrosov Institute for System Dynamics and Control Theory of SB RAS Irkutsk Russia

In this paper, impulsive control systems described by measure-driven differential equations with rate independent hysteresis are considered. Approximation results for impulsive processes are presented.

关键词： Hysteresis Trajectory Differential equations Aerospace electronics system dynamics control theory

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Modeling of a RF Surgical Generator based on a Push-Pull Oscillator

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IFAC-PapersOnLine 2019年第15期52卷 382-387页

作者： Philip L. Neureuther Michael Ederer Peter Selig Matthias A. Müller Institute for System Dynamics University of Stuttgart Germany Erbe Elektromedizin GmbH Tübingen Germany Institute for Systems Theory and Automatic Control University of Stuttgart Germany Institute of Automatic Control Leibniz University Hanover Germany

To reduce manufacturing costs, a new simple radio frequency (RF) surgical generator based on a push-pull oscillator is developed for cutting tissue. In order to systematically design and test feedback controllers keeping the generator’s output voltage constant, we will present two different models of the considered RF generator. The first one is a nonlinear state space model derived using the generator’s equivalent circuit diagram and Kirchhoff’s laws and the second one is a Hammerstein model. The models are based on physical principles and are successfully validated on a generator prototype, ensuring a good match with the static and dynamic behavior of the considered RF generator. The obtained state space model is well suited to simulate the RF generator, while the Hammerstein model is appropriate to design controllers for the generator’s output voltage.

关键词： surgical generator push-pull oscillator equivalent circuit model state space model Hammerstein model

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Necessary optimality conditions for optimal impulsive control problems with hysteresis

Necessary optimality conditions for optimal impulsive contro...

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International Conference on Stability and Oscillations of Nonlinear control systems (Pyatnitskiy's Conference)

作者： O. N. Samsonyuk S. A. Timoshin Matrosov Institute for System Dynamics and Control Theory of SB RAS Irkutsk Russia

We study a class of optimal control problems for measure-driven differential equations with rate independent hysteresis. The hysteresis is modeled by an evolution variational inequality equivalent to the action of play operator generalized to the case of discontinuous inputs of bounded variation. A method to obtain optimality conditions for impulsive processes is proposed.

关键词： Hysteresis Optimal control Trajectory Biological system modeling Process control Differential equations Mathematical model

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Solutions of traveling wave type for korteweg-de vries-type system with polynomial potential 9th

Solutions of traveling wave type for korteweg-de vries-type ...

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9th International Conference on Optimization and Applications, OPTIMA 2018

作者： Beklaryan, Levon A. Beklaryan, Armen L. Gornov, Alexander Yu. Central Economics and Mathematics Institute RAS Nachimovky prospect 47 Moscow117418 Russia National Research University Higher School of Economics Kirpichnaya Ulitsa 33 Moscow105187 Russia Institute for System Dynamics and Control Theory of SB RAS Lermontova street 134 Irkutsk664033 Russia

ISBN: (纸本)9783030109332

This paper deals with the implementation of numerical methods for searching for traveling waves for Korteweg-de Vries-type equations with time delay. Based upon the group approach, the existence of traveling wave solution and its boundedness are shown for some values of parameters. Meanwhile, solutions constructed with the help of the proposed constructive method essentially extend the class of systems, possessing solutions of this type, guaranteed by theory. The proposed method for finding solutions is based on solving a multiparameter extremal problem. Several numerical solutions are demonstrated. © Springer Nature Switzerland AG 2019.

关键词： Korteweg-de Vries equation

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Orthogonality-based classification of diagonal Latin squares of order 10 8

Orthogonality-based classification of diagonal Latin squares...

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Selected Papers of the 8th International Conference "Distributed Computing and Grid-Technologies in Science and Education", GRID 2018

作者： Vatutin, Eduard Titov, Vitaly Zaikin, Oleg Kochemazov, Stepan Manzuk, Maxim Nikitina, Natalia Southwest State University Kursk Russia Matrosov Institute for System Dynamics and Control Theory SB RAS Irkutsk Russia BOINC.ru Moscow Russia Institute of Applied Mathematical Research KRCRAS Petrozavodsk Russia

The article describes combinatorial structures based on diagonal Latin squares (DLS) of order 10 and the orthogonality condition between pairs of such squares. These structures are novel and interesting in the context of the well-known open problem aimed at finding a triple of mutually orthogonal DLSs of order 10. The structures were found in the BOINC-based volunteer computing projects SAT@home and Gerasim@home. © 2018 Eduard Vatutin, Vitaly Titov, Oleg Zaikin, Stepan Kochemazov, Maxim Manzuk, Natalia Nikitina.

关键词： Combinatorial mathematics

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Data aggregation in the astroparticle physics distributed data storage

arXiv

引用

arXiv 2019年

作者： Nguyen, Minh-Duc Kryukov, Alexander Dubenskaya, Julia Korosteleva, Elena Bychkov, Igor Mikhailov, Andrey Shigarov, Alexey Lomonosov Moscow State University Skobeltsyn Institute of Nuclear Physics 1/2 Leninskie Gory Moscow119991 Russia Matrosov Institute for System Dynamics and Control Theory Siberian Branch of Russian Academy of Sciences Lermontov st. 134 Irkutsk Russia

German-Russian Astroparticle Data Life Cycle Initiative is an international project whose aim is to develop a distributed data storage system that aggregates data from the storage systems of different astroparticle experiments. The prototype of such a system, which is called the Astroparticle Physics Distributed Data Storage (APPDS), has been being developed. In this paper, the Data Aggregation Service, one of the core services of APDDS, is presented. The Data Aggregation Service connects all distributed services of APPDS together to find the necessary data and deliver them to users on demand. Copyright © 2019, The Authors. All rights reserved.

关键词： Life cycle

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Metadata extraction from raw astroparticle data of TAIGA experiment

arXiv

引用

arXiv 2019年

作者： Bychkov, Igor Dubenskaya, Julia Korosteleva, Elena Kryukov, Alexandr Mikhailov, Andrey Nguyen, Minh-Duc Shigarov, Alexey Matrosov Institute for System Dynamics and Control Theory Siberian Branch of Russian Academy of Sciences Lermontov St. 134 Irkutsk Russia Moscow Russia Institute of Mathematics Economics and Informatics Irkutsk State University Gagarin Blvd. 20 Irkutsk Russia

Today, the operating TAIGA (Tunka Advanced Instrument for cosmic rays and Gamma Astronomy) experiment continuously produces and accumulates a large volume of raw astroparticle data. To be available for the scientific community these data should be well-described and formally characterized. The use of metadata makes it possible to search for and to aggregate digital objects (e.g. events and runs) by time and equipment through a unified interface to access them. The important part of the metadata is hidden and scattered in folder/files names and package headers. Such metadata should be extracted from binary files, transformed to a unified form of digital objects, and loaded into the catalog. To address this challenge we developed a concept of the metadata extractor that can be extended by facility-specific extraction modules. It is designed to automatically collect descriptive metadata from raw data files of all TAIGA formats. Copyright © 2019, The Authors. All rights reserved.

关键词： Metadata

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