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Methods and software tools for computer-aided design of the spacecraft guidance, navigation and control systems

AIP Conference Proceedings 2017年第1期1798卷

作者： Yevgeny Somov Gennady Oparin 1Samara State Technical University Samara 443100 Russia 2Matrosov Institute for System Dynamics and Control Theory Siberian Branch Russian Academy of Sciences Irkutsk 664033 Russia

We shortly present results on development and employment of the software systems for computer-aided design of the spacecraft guidance. navigation and control systems – modeling, synthesis, nonlinear analysis, simulat...

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Updated limits on the CP violating ηππ and η′ππ couplings derived from the neutron EDM

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Physical Review D 2019年第11期99卷 115004-115004页

作者： Alexey S. Zhevlakov Thomas Gutsche Valery E. Lyubovitskij Department of Physics Tomsk State University 634050 Tomsk Russia Matrosov Institute for System Dynamics and Control Theory SB RAS Lermontov Street 134 664033 Irkutsk Russia Institut für Theoretische Physik Universität Tübingen Kepler Center for Astro and Particle Physics Auf der Morgenstelle 14 D-72076 Tübingen Germany Departamento de Física y Centro Científico Tecnológico de Valparaíso-CCTVal Universidad Técnica Federico Santa María Casilla 110-V Valparaíso Chile

We complete our derivation of upper limits on the CP violating ηππ and η′ππ couplings from an analysis of their two-loop contributions to the neutron electric dipole moment (nEDM). We use a phenomenological Lagrangian approach which is formulated in terms of hadronic degrees of freedom—nucleons and pseudoscalar mesons. The essential part of the Lagrangian contains the CP violating couplings between η(η′) and pions. Previously, we included photons using minimal substitution in case of the proton and charged pions. Now we extend our Lagrangian by adding the nonminimal couplings, i.e., anomalous magnetic couplings of nucleons with the photon. The obtained numerical upper limits for the ηππ and η′ππ couplings |fηππ(Mη2)|<4.4×10−11 and |fη′ππ(Mη′2)|<3.8×10−11 can be useful for the related, planned experiments at the JLab Eta Factory. Using present experimental limits on the nEDM, we derive upper limits on the CP violating θ¯ parameter of θ¯<4.7×10−10.

关键词： Electric moment Neutrons CP violation

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Application of iterative hill climbing to the sound speed profile inversion in underwater acoustics

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IOP Conference Series: Materials Science and Engineering 2017年第1期173卷

作者： O Zaikin P Petrov Matrosov Institute for System Dynamics and Control Theory SB RAS Irkutsk Russia V.I. Il'ichev Pacific Oceanological Institute FEB RAS Vladivostok Russia Far Eastern Federal University Vladivostok Russia

An application of the iterative hill climbing algorithm to the solution of inverse problems of underwater acoustics is discussed. Modal dispersion data extracted from a recording of a pulse acoustical signal is used as the input for the geoacoustic inversion procedure. The mismatch of the dispersion curves extracted from experimental data and computed from a given set of waveguide parameters is minimized over the parameters space. The solution of two test inversion problems is considered. It is shown that the iterative launches of the hill climbing algorithm allow to locate either the global minimum or a local minimum which is reasonably close to the former. In the latter case a reasonable estimate of the waveguide parameters is obtained.

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Cloud storage capable to select events upon user request for medium-sized astrophysical experiments

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Journal of Physics: Conference Series 2021年第1期1740卷

作者： Alexander Kryukov Igor Bychkov Elena Korosteleva Andrey Mikhalov Min-Duc Nguyen M. V. Lomonosov Moscow State University D. V. Skobeltsyn Institute of Nuclear Physics Russia Matrosov Institute for System Dynamics and Control Theory Siberian Branch of Russian Academy of Sciences Russia

We present a cloud storage for collaborations of small and medium-sized experiments in the field of particle astrophysics. This storage provides a unified interface for accessing data from different experiments. In this article, we will focus on the capabilities of the storage for processing user requests for data, as well as on some technical details of the implementation of data selection. We have deployed a working prototype of the storage. Currently the prototype integrates data from such astrophysical experiments as TAIGA and KASCADE. As a result, users of the respective collaborations have the opportunity to collect scientific data from different experiments seamlessly within one request to conduct joint data analysis.

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Deuteron EDM induced by CP-violating couplings of pseudoscalar mesons

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Physical Review D 2020年第11期101卷 115041-115041页

作者： Alexey S. Zhevlakov Valery E. Lyubovitskij Department of Physics Tomsk State University 634050 Tomsk Russia Matrosov Institute for System Dynamics and Control Theory SB RAS Lermontov str. 134 664033 Irkutsk Russia Institut für Theoretische Physik Universität Tübingen Kepler Center for Astro and Particle Physics Auf der Morgenstelle 14 D-72076 Tübingen Germany Departamento de Física y Centro Científico Tecnológico de Valparaíso-CCTVal Universidad Técnica Federico Santa María Casilla 110-V Valparaíso Chile

We analyze contributions to the electric dipole moment (EDM) and Schiff moment of deuteron induced by the CP-violating three-pseudoscalar meson couplings using phenomenological Lagrangian approach involving nucleons and pseudoscalar mesons P=π,K,η,η′. Deuteron is considered as a proton-neutron bound state and its properties are defined by one- and two-body forces. One-body forces correspond to a picture there; proton and neutron are quasifree constituents of deuteron and their contribution to the deuteron EDM (dEDM) is simply the sum of proton and neutron EDMs. Two-body forces in deuteron are induced by one-meson exchange between nucleons. They produce a contribution to the dEDM, which is estimated using corresponding potential approach. From numerical analysis of nucleon and deuteron EDMs, we derive stringent limits on CP-violating hadronic couplings and θ¯ parameter. We showed that proposed measurements of proton and deuteron EDMs at level of ∼10−29 by the Store Ring EDM and JEDI Collaborations will provide more stringent upper limits on the CP-violating parameters.

关键词： Electric moment Rare decays Neutrons Protons

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The validation system for reliability and survivability of unique mechanical systems

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IOP Conference Series: Materials Science and Engineering 2021年第1期1061卷

作者： A F Berman O A Nikolaichuk A Yu Yurin Matrosov Institute for System Dynamics and Control Theory SB RAS (ISDCT SB RAS) 664033 Irkutsk :134 Lermontova St. Irkutsk National Research Technical Universit 664074 Irkutsk 83 Lermontova St.

We propose a concept of the validation system for the properties of reliability and survivability of unique mechanical systems, the failures of which can result in accidents. The system is based on the principles of self-organization and provides the opportunity to consider off-design impacts of any origin, errors in design and operation based on the use of appropriate rules formulated by experts. The principles of self-organization are implemented by a mechanism based on the rules that step-by-step formulate the necessary tasks, the required expert systems and computing units to solve them, as well as on the rules directly linking negative factors and neutralizing their properties.

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Precision adjustment of electromagnetic emitter of large-scale systems such as GLONASS

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IOP Conference Series: Materials Science and Engineering 2020年第1期760卷

作者： A V Banshchikov A V Daneev V A Rusanov A A Vetrov Matrosov Institute for System Dynamics and Control Theory of the Siberian Branch of the Russian Academy of Sciences 130 Lermontov ave. Irkutsk 664033 Russia Irkutsk State Transport University 15 Chernyshevskogo ave. 664074 Irkutsk Russia

The multidimensional nonlinear regression-tensor model is investigated in the substantiation of necessary and sufficient conditions for the optimal multi-factorial process of precision calibration of the parameters of the electromagnetic radiation source in the geostationary orbit (including the large-scale GLONASS system). A robust-adaptive strategy of a posteriori formation of the target functional of electromagnetic observability of a weighted-distributed signal in an established complex of stationary ground points is proposed on the basis of observations of this signal, made with a tolerance.

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Air pollution and population morbidity forecasting with artificial neural networks

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IOP Conference Series: Earth and Environmental Science 2018年第1期211卷

作者： A Yu Gornov T S Zarodnyuk N V Efimova Institute for System Dynamics and Control Theory Siberian Branch of Russian Academy of Sciences Lermontov str. 134 Post Box 64033 Irkutsk Russia East-Siberian Institute of Medical and Ecological Research 12a District 3 665827 Angarsk Russia

Incidence prediction models for urban population have not yielded consistent or highly accurate results. The complex nature of the interrelationship between 'environmental factors and incidence' has many nonlinear associations with outcomes. We explore artificial neural networks (ANNs) to predict the complex interactions between the risk factors of incidence among the urban population. ANN modeling using a standard feed-forward, back-propagation neural network with three layers (i.e., an input layer, a hidden layer, and an output layer) is used to predict the incidences of diseases of children and adults. A receiver-operating characteristic (ROC) analysis is used to assess the model accuracy. We develop a mathematical model taking into account factors of natural, anthropogenic, and social environments. The model effectiveness is proved by computing experiments for the Bratsk industrial centre (Irkutsk region, Russia). Optimal air pollution levels are offered to achieve a background morbidity level among different age groups of the population. The prediction of incidence is most accurate when using the ANN model with several univariate influences on the outcome. An incorporation of some computerized learning systems might improve decision making and outcome prediction.

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Implication of hidden sub-GeV bosons for the (g−2)μ, Be8−He4 anomaly, proton charge radius, EDM of fermions, and dark axion portal

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Physical Review D 2020年第9期102卷 095024-095024页

作者： D. V. Kirpichnikov Valery E. Lyubovitskij Alexey S. Zhevlakov Institute for Nuclear Research of the Russian Academy of Sciences 117312 Moscow Russia Institut für Theoretische Physik Universität Tübingen Kepler Center for Astro and Particle Physics Auf der Morgenstelle 14 D-72076 Tübingen Germany Departamento de Física y Centro Científico Tecnológico de Valparaíso-CCTVal Universidad Técnica Federico Santa María Casilla 110-V Valparaíso Chile Department of Physics Tomsk State University 634050 Tomsk Russia Tomsk Polytechnic University 634050 Tomsk Russia Matrosov Institute for System Dynamics and Control Theory SB RAS Lermontov street 134 664033 Irkutsk Russia

We discuss new physics phenomenology of hidden scalar (S), pseudoscalar (P), vector (V) and axial-vector (A) particles coupled to nucleons and leptons, which could give contributions to proton charge radius, (g−2)μ, Be8−He4 anomaly and electric dipole moment (EDM) of Standard Model (SM) particles. In particular, we estimate sensitivity of NA64μ experiment to observe muon missing energy events involving hidden scalar and vector particles. That analysis is based on geant4 Monte Carlo simulation of the signal process of muon scattering off target nuclei μN→μNS(V) followed by invisible boson decay into dark matter (DM) particles, S(V)→χχ. The existence of light sub-GeV bosons could possibly explain the muon (g−2) anomaly observed. We also summarize existing bounds on ATOMKI X17(JP=0−,1±) boson coupling with neutron, proton, and electron. We implement these constraints to estimate the contribution of P, V. and A particles to proton charge radius via direct 1-loop calculation of Sachs form factors. The analysis reveals the corresponding contribution is negligible. We also calculate bounds on dark axion portal couplings of dimension-five operators, which contribute to the EDMs of leptons and neutron.

关键词： Axions Composite models Electric moment Extensions of Higgs sector Extensions of gauge sector Form factors Magnetic moment Single-particle dynamics Parity Monte Carlo methods Nuclear structure & decays

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Deep inelastic e−τ and μ−τ conversion in the NA64 experiment at the CERN SPS

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Physical Review D 2018年第1期98卷 015007-015007页

作者： Sergei Gninenko Sergey Kovalenko Serguei Kuleshov Valery E. Lyubovitskij Alexey S. Zhevlakov Institute for Nuclear Research 117312 Moscow Russia Departamento de Física y Centro Científico Tecnológico de Valparaíso-CCTVal Universidad Técnica Federico Santa María Casilla 110-V Valparaíso Chile Institut für Theoretische Physik Universität Tübingen Kepler Center for Astro and Particle Physics Auf der Morgenstelle 14 D-72076 Tübingen Germany Department of Physics Tomsk State University 634050 Tomsk Russia Tomsk State Pedagogical University 634061 Tomsk Russia Matrosov Institute for System Dynamics and Control Theory SB RAS Lermontov str. 134 664033 Irkutsk Russia

We study the lepton flavor violating (LFV) e(μ)−τ conversion in deep inelastic scattering (DIS) of electrons (muons) on fixed-target nuclei. Our model-independent analysis is based on the set of low-energy effective four-fermion LFV operators composed of leptons and quarks with the corresponding mass scales Λk for each operator. Using the estimated sensitivity of the search for this LFV process in events with large missing energy in the NA64 experiment at the CERN SPS, we derive lower limits for Λk and compared them with the corresponding limits existing in the literature. We show that the DIS e(μ)−τ conversion is able to provide a plenty of new limits as yet nonexisting in the literature. We also analyzed the energy spectrum of the final-state τ and discussed the viability of the observation of this process in the NA64 experiment and ones akin to it. The case of polarized beams and targets is also discussed.

关键词： Particle interactions

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