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5th Asian School-Conference on Physics and Technology of Nanostructured Materials, ASCO-Nanomat 2020

作者： Syubaev, S.A. Porfirev, A.P. Kuchmizhak, A.A. Institute of Automation and Control Processes FEB RAS 5 Radio Str Vladivostok690041 Russia Samara National Research University Moskovskoe shosse 34 Samara443086 Russia Image Processing Systems Institute of the RAS-Branch of FSRC «Crystallography & Photonics» of the RAS 151 Molodogvardeyskaya Str Samara443001 Russia

ISBN: (纸本)9783035737936

Here, we showed formation of chiral nanoprotrusions upon direct laser ablation of bulk crystalline silicon (c-Si) wafer with single femtosecond (fs) pulses having asymmetric donut-shaped intensity profile. Breaking circular symmetry of the irradiating donut-shaped fs-pulse beam was demonstrated to switch the geometry of formed surface nanoprotrusions from regular to chiral, while the chirality of the obtained Si nanostructures was found to promote with a degree of asymmetry of the laser beam. The obtained experimental results explain, for the first time, the formation of previously reported chiral c-Si nanostructures produced via donut-shaped beam ablation in terms of uneven helical flow of laser-melted Si material caused by asymmetry of initial intensity and temperature pattern on laser-irradiated Si surface. Our findings open a pathway towards easy-to-implement inexpensive fabrication of chiral all-dielectric nanostructures for advanced nanophotonic applications. © 2020 Trans Tech Publications Ltd, Switzerland.

关键词： Laser materials processing

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Joint work of two mobile robots at the execution of manipulation operations

Joint work of two mobile robots at the execution of manipula...

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2019 International Science and Technology Conference "EastConf", EastConf 2019

作者： Filaretov, V. Katsurin, A. Far Eastern Federal University Institute of Automation and Control Processes FEB RAS Vladivostok Russia

ISBN: (纸本)9781728119311

The paper considers a new approach to the joint control of two mobile robots. Both are equipped with vision systems, and one of them also with a multi-link manipulator. The created control system provides automatic execution of manipulation operations with various objects when the work object is out of the visibility zone of the mobile robot with manipulator. In this case the position of this object is determined by the vision system of the auxiliary robot. © 2019 IEEE.

关键词： Manipulators

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Au-induced reconstructions of the Si(111) surface with ordered and disordered domain walls

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Physical Review B 2020年第7期101卷 075405-075405页

作者： L. V. Bondarenko A. N. Mihalyuk A. Y. Tupchaya Y. E. Vekovshinin D. V. Gruznev A. V. Zotov A. A. Saranin Institute of Automation and Control Processes FEB RAS 690041 Vladivostok Russia School of Natural Sciences Far Eastern Federal University 690950 Vladivostok Russia

Scanning tunneling microscopy (STM) and angle-resolved photoemission spectroscopy (ARPES) observations combined with the density functional theory (DFT) calculations were used to elucidate atomic arrangement of Au/Si(111) reconstructions forming at Au coverage around one monolayer. They include the Si(111)6×6-Au with ordered domain walls, the Si(111)α−3×3-Au and the Si(111)β−3×3-Au surfaces with disordered domain walls of various density, and the Si(111)221×221-Au surface which structure is relevant to those of other reconstructions, albeit cannot be ascribed solely to the domain walls. Using detailed comparison of the STM and ARPES data with the results of DFT calculations, we explicitly proved the atomic model of Si(111)6×6-Au surface proposed by Grozea et al. [Surf. Sci. 418, 32 (1998)]. This model provided us a hint for constructing an atomic model of domain walls which demonstrates a proper coincidence between experimental and simulated STM images. The model contains five Au atoms per 2×3 unit cell, i.e., 1.25 monolayers of Au. For the α−3×3-Au and β−3×3-Au surfaces, this finding allows an overall description of their atomic arrangement and, hence, accurate determination of their Au coverages. Knowledge on the atomic arrangement of the Si(111)6×6-Au surface and domain walls also allowed us to construct an atomic model of the Si(111)221×221-Au surface. The obtained data were unified in the refined formation phase diagram for the Au/Si(111) system.

关键词： Domain walls Phase diagrams Surface reconstruction Surface states Monolayer films Surfaces Angle-resolved photoemission spectroscopy Density functional theory Electronic structure Low-energy electron diffraction Scanning tunneling microscopy

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On modeling the process of solid fuel sublimation in a combined charge of a low-temperature gas-generator in the OpenFOAM software

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AIP Conference Proceedings 2023年第1期2504卷

作者： K. G. Borovik S. S. Fetsov 1Institute of Automation and Control Processes of the FEB RAS 690041 Vladivostok Russia 2Far Eastern Federal University 690091 Vladivostok Russia

A novel computational method is proposed for studying the processes of solid fuel sublimation in a combined charge of a low-temperature gas generator. The method is based on the finite volume discretization and the SIMPLE algorithm and is implemented in the OpenFOAM software. The computational results are compared with those obtained by the previously developed finite-difference method, and the higher performance of the new model is revealed. Another advantage of the method is that it is more convenient for use, more flexible for certain modifications, and can be easily adapted for multidimensional problems.

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The development of popular science "living Earth: Geological perspective" 5

The development of popular science "living Earth: Geological...

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5th International Conference Information Technologies in Earth Sciences and Applications for Geology, Mining and Economy, ITES and MP 2019

作者： Eremenko, Aleksandr S. Naumova, Vera V. Institute of Automation and Control Processes of FEB RAS Vladivostok Russia Vernadsky State Geological Museum RAS Moscow Russia

The study describes an approach for creation of popular-science internet-resource "Living Earth: Geological Perspective". The internet-resource being developed is aimed to popularize modern geological knowledge by providing popular science multimedia content and tools for interactive interaction with it. The internet-resource is intended for wide range of Internet users. In the same time the whole information represented on it should be contemporary, scientifically verified, valid and actual. Important aspects of the portal are the simplicity of material representation and attractiveness for users of the modern "digital" community. 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： Multimedia systems

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The open access portal to Vernadsky State Geological Museum of Russian Academy of Sciences data 5

The open access portal to Vernadsky State Geological Museum ...

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5th International Conference Information Technologies in Earth Sciences and Applications for Geology, Mining and Economy, ITES and MP 2019

作者： Platonov, Kirill A. Naumova, Vera V. Eremenko, Vitaliy S. Dyakov, Sergey E. Starodubtseva, Iraida A. Vernadsky State Geological Museum RAS Moscow Russia Institute of Automation and Control Processes FEB RAS Vladivostok Russia

In article share data of the Vernadsky State Geological Museum of ras, one of the oldest natural-science museum of Russia, which began to be created in 1759, are described and more than 250 years are replenished thanks to scientists, patrons and collectors. Development of the Portal of open access to data of the Museum is discussed. The Portal provides data sets to users on the Internet. It allows any Internet user to research, load and use data for researches and the educational purposes. The standards of metadata and protocols can be used further for integration of data SGM ras into the Russian and world networks of natural science museum data. 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： Geology

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Application of zinc sulfide quantum dots for optical sensing 4th

Application of zinc sulfide quantum dots for optical sensing

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4th Asian School-Conference on Physics and Technology of Nanostructured Materials, ASCO-NANOMAT 2018

作者： Sergeev, Aleksandr A. Leonov, Andrey A. Galkina, Anna N. Voznesenskiy, Sergey S. Institute of Automation and Control Processes of FEB RAS 5 Radio St. Vladivostok690041 Russia

ISBN: (纸本)9783035715682

The luminescent sensory systems based on manganese-doped zinc sulfide quantum dots were developed for aqueous environment monitoring. The structural, optical and sensory characteristics of quantum dots were investigated. The mechanism of ZnS:Mn2+ interaction with methane in the aqueous media, as well as factors that have a primary influence on the formation of the sensory response in the reaction with methane, were determined. © 2019 Trans Tech Publications Ltd, Switzerland

关键词： Semiconductor quantum dots

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To the Issue of the Development of Partial Discharge Theory

To the Issue of the Development of Partial Discharge Theory

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2019 International Multi-Conference on Industrial Engineering and Modern Technologies, FarEastCon 2019

作者： Kinsht, N.V. Petrunko, N.N. Silin, N.V. Tetiora, S.Y. Institute of Automation and Control Processes FEB RAS Vladivostok Russia FEFU School of Engineering Vladivostok Russia

ISBN: (纸本)9781728100616

The characteristics of partial discharges (PD) which make possible to draw conclusions about the technical condition of high-voltage equipment are considered. (HVE). The efficiency and feasibility of applying existing methods for assessing the technical condition of HVE based on the characteristics of the apparent charge are analyzed. Existing uncertainties in the theory of PD are examined, in particular, the question of the real number of PD sources (potential defects) present in the insulation of HVE and creating a complex integrated picture of PD pulses. A new approach to the analysis of PD based on the transition process model is proposed. With this approach, the PD process is characterized by the initial conditions, the free component, which depends on the properties of inclusion, insulation and parameters of the electric circuit, as well as the forced component, which depends on the external influence of the electric field. Diagnostic capabilities that can be obtained by applying the described approach to the analysis of PD processes to solve the problem of the real number of defects in the isolation of HVE are analyzed. © 2019 IEEE.

关键词： Partial discharges

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Method of identification of kinematic and elastostatic parameters of multilink manipulators without external measuring devices

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IFAC-PapersOnLine 2020年第2期53卷 9879-9884页

作者： Dmitry A. Yukhimets Anton S. Gubankov Robotic Lab Institute of Automation and Control Processes FEB RAS Vladivostok Russia Department of Automation and Control Far Eastern Federal University Vladivostok Russia Innopolis University Innopolis Tatarstan Russia

The paper deals with a method of identification of kinematic and elastostatic parameters of multilink industrial manipulators. This method does not require complex and expensive equipment for high-precision external measurements of position and orientation of the working tool in the Cartesian coordinate system. The method gives simple and cheap means to parameters identification and their implementation allows significantly increase the dynamic accuracy of the movement of working tools of serial manipulators along spatial trajectories during the performance of various technological operations of real production. The simulation is considered.

关键词： robots manipulators identification control methods kinematic parameters elastostatic

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Heat Transfer and Gas Flow in Granular Energy-Releasing Materials: Novel Computational Model and Important Features

SSRN

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SSRN 2022年

作者： Lutsenko, Nickolay A. Fetsov, Sergey S. Borovik, Ksenia G. Kim, Alina S. Institute of Automation and Control Processes Far Eastern Branch of the RAS 5 Radio St. Vladivostok690041 Russia Far Eastern Federal University 8 Sukhanova St. Vladivostok690950 Russia

In this paper, the process of flowing the coolant gas through granular or porous media with heat-generating sources is considered. Such process takes place in various ruinous objects with energy release sources formed after natural or man-made disasters, e.g., in destroyed power unit of a nuclear power plant like exploded reactor No. 4 of the Chernobyl NPP. Also, this process is typical for some technologies, e.g., for innovative pebble-bed nuclear reactors. A computational model and OpenFOAM solver have been developed in this work to simulate the fluid flow and heat transfer in granular or porous energy-releasing materials. The proposed mathematical model is based on the assumption of interacting interpenetrating continua, and the developed numerical method is based on the PIMPLE algorithm adapted for the system of governing equations. The novel OpenFOAM solver has been tested on 1D and 2D problems, which were previously solved by known algorithms based on the finite difference method. The new solver is many times faster and makes it possible to carry out calculations of 2D and 3D processes without parallelization within reasonable time, in contrast to the previously used numerical methods. The 3D gas flows through porous energy-releasing object have been studied, and some important features of these processes have been revealed. It has been shown that the temperature dependence of the gas dynamic viscosity leads not only to the fact that the gas tends to flow around the hot zones, but also to an additional increase in temperature in the heated area, caused by a drop of the density and velocity of the gas due to increasing the flow resistance force in this region. It has been revealed that if the total intensity of the energy release in the porous object is known a priori, but the relative location of the energy release sources is unknown, it is impossible to predict the maximum temperature of the object. © 2022, The Authors. All rights reserved.

关键词： Flow of gases

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