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Computer Optics 2009年第3期33卷 318-324页

作者： Kulchin, Yury Nikolaevich Zakasovskaya, Elena Vladimirovna Institute of Automation and Control Processes FEB RAS Russia Far Eastern National University Russia

The paper discusses tomography reconstruction of distributed physical fields by means of distributed fiber optical measuring systems (FOMN) for incomplete parallel schemes of measuring lines (ML) stacking. The approach is presented, allowing to use Radial Basis Function Neural Network(RBFNN) for preprocessing of projection data for the purpose of further application to them of methods of approximating for the nonregular schemes of stacking of ML of more simple form. © 2009, Institution of Russian Academy of Sciences. All rights reserved.

关键词： Optical tomography

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Metallic nanofilms on single crystal silicon: Growth, properties and applications

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Modern Electronic Materials 2017年第2期3卷 57-65页

作者： Nikolay I. Plusnin Institute of Automation and Control Processes FEB RAS (IACP) 5 Radio Str. Vladivostok 690041 Russia

The metal–silicon thin-film system is not isostructural and furthermore exhibits pronounced interdiffusion and chemical reactions. Therefore the growth of metallic films on silicon leads to a nanosize nonhomogenity of films and a high concentration of defects, especially at interface. The material also contains stressed transition layer, which can contain alloys and/or compounds (silicides). We have considered theoretical viewpoints and reviewed experimental data on the growth and properties of metallic nanofilms (including multilayered ones) on silicon, and also provided a brief review of their applications. The films consist either of atomic-sized, quabquantum sized and quantum sized layers. We have suggested a low temperature film growth technology based on freezing growing layers during deposition by maintaining a low temperature of the substrate and using an atomic beam with a reduced heat power. The technology uses a specially shaped deposition system in which the distance between the source and the substrate is comparable to their size or smaller. Furthermore, we use a special time sequence of deposition that provides for a reduced substrate surface temperature due to greater intervals between deposition pulses. This growth method of atomically thin films and multilayered nanofilms excludes interdiffusion between the layers, reduces three-dimensional growth rate and relatively increases lateral layer growth rate.

关键词： Metal Silicon Silicide film Single crystal substrate Interdiffusion Reaction Growth Molecular beam flow Low temperature growth Growth methods

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An influence of the Si(111)3-4O vicinal surface on the solid phase epitaxy of α-FeSi2 nanorods and their crystal parameters 4th

An influence of the Si(111)3-4O vicinal surface on the solid...

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

作者： Galkin, Nikolay G. Galkin, Konstantin N. Dotsenko, Sergei A. Goroshko, Dmitrii L. Chusovitin, Evgeniy A. Gutakovskii, Anton K. Institute of Automation and Control Processes FEB RAS 5 Radio Street Vladivostok690041 Russia Far Eastern Federal University 8 Sukhanova Street Vladivostok690090 Russia Rzhanov Institute of Semiconductor Physics SB RAS Novosibirsk Russia

ISBN: (纸本)9783035715682

The morphology and structure of iron silicide nanorods formed on Si(111) vicinal surface by the SPE method at T = 630 °C were studied. Optimal Fe coverage and Fe deposition rate for the formation of a dense array of the nanorods (54-65% of the substrate area) on Si (111) surface with 3-4o miscut angles were established. The aspect ratio of the nanorods is 1.9 – 3.3. Cross-sectional images of a high-resolution transmission electron microscopy (HRTEM) have shown that the nanorods have α-FeSi2 crystal structure. They are strained along the "a" axis and stretched along the "c" axis, which increased the unit cell volume by 10.3%. According to HRTEM image analysis, the nanorods have the following epitaxial relationships: α-FeSi2[0 1]//Si[1 0] and α-FeSi2(112)//Si(111). All the data obtained have provided, for the first time, a direct evidence of α-FeSi2 nanorods formation on Si(111) vicinal surface without noticeable penetration of Fe atoms into the Si substrate. © 2019 Trans Tech Publications Ltd, Switzerland

关键词： Iron

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Structural features of nanocomposites based on cadmium sulfide nanoparticles in glass matrix 3rd

Structural features of nanocomposites based on cadmium sulfi...

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3rd Asian School-Conference on Physics and Technology of Nanostructured Materials, ASCO-Nanomat 2015

作者： Galkina, A.N. Nepomnyaschiy, A.V. Evgenov, N.S. Postnova, I.V. Institute of Automation and Control Processes of FEB RAS 5 Radio St. Vladivostok690041 Russia Far Eastern Federal University 8 Sukhanova St. Vladivostok690950 Russia

ISBN: (纸本)9783038356820

We study stable stable transparent monolithic nanocomposites based on the silica matrix doped with CdS nanoparticles (NPs) of different nature. The first kind of nanocomposite was obtained by nucleation and growth of nanoparticles in glass matrix during heat treatment. The second nanocomposite was obtained by immobilization of pre-made nanoparticles into silica gel matrix. This work is focused on characterization of the nanocomposites in the submicron scale by using electron microscopy and small angle x-ray scattering techniques. Experimental results show that both types of nanocomposites have homogeneous distribution of quantum dots. Form-factor and average size of CdS NPs depend on the synthesis technique. © (2016) Trans Tech Publications, Switzerland.

关键词： Cadmium sulfide

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Electrostatic Field Influence on Luminescence Features of Cadmium Sulphide Quantum Dots in Silica Matrix

Electrostatic Field Influence on Luminescence Features of Ca...

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International Conference on Photonics of Nano- and Bio-Structures, PNBS-2015, Russia and the International Conference on Photonics of Nano- and Micro-Structures, PNMS-2015

作者： Voznesenskiy, S.S. Sergeev, A.A. Postnova, I.V. Shchipunov, Y.A. Institute of Automation and Control Processes FEB RAS 5 Radio St. Vladivostok690041 Russia Far Eastern Federal University 8 Sukhanova St. Vladivostok690950 Russia Institute of Chemistry of FEB RAS 159 Prosp. 100-Letiya Vladivostoka Vladivostok690022 Russia

The effect of electrostatic field on optical properties of silicate nanocomposite with cadmium sulfide quantum dots was investigated. It was found that the electrostatic field causes quantum dot orientation along the field force lines leading to changes in the polarized components of the luminescence spectrum. The influence of field force line direction on photoinduced absorption characteristics arised from λ = 405.9 nm laser radiation exposure to nanocomposite was shown. © 2017 The Authors.

关键词： Luminescence

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On difference between horizontal and vertical waves of heterogeneous combustion in porous objects under free convection

On difference between horizontal and vertical waves of heter...

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9th Asia-Pacific Conference on Combustion, ASPACC 2013

作者： Lutsenko, Nickolay A. Institute of Automation and Control Processes FEB RAS 5 Radio St. Vladivostok 690041 Russia Far Eastern Federal University 8 Sukhanova St. Vladivostok 690950 Russia

Using numerical experiment one-dimensional unsteady processes of heterogeneous combustion in porous object under free convection in horizontal case have been investigated and compared with vertical case. It is shown that in the case of the horizontal porous object the oxidizer supply, which is the result of natural convection, is not sufficient for the appearance of stable wave of heterogeneous combustion. In contrast to the vertical position of the object, there are no long-lived combustion waves in the horizontal case, which completely burns down the solid combustible material. When the ignition zone is on the border of the object, the combustion wave near the vicinity of the boundary burns the oxygen and becomes extinct. When the ignition zone is in the center of the porous object, two combustion waves arise which may move very slowly, burn oxygen and become extinct.

关键词： Natural convection

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Formation and optical properties of thin Mg2Ge films on Si(001) substrate 3rd

Formation and optical properties of thin Mg2Ge films on Si(0...

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3rd Asian School-Conference on Physics and Technology of Nanostructured Materials, ASCO-Nanomat 2015

作者： Goroshko, Dmitry L. Chusovitin, Evgeniy A. Galkin, Konstantin N. Chernev, Igor M. Galkin, Nikolay G. Institute of Automation and Control Processes FEB RAS 5 Radio St. Vladivostok690041 Russia Far Eastern Federal University 8 Sukhanova St. Vladivostok690950 Russia

ISBN: (纸本)9783038356486

Thin Mg2Ge films were grown using two methods: a co-deposition of Ge and Mg on Si substrate kept at room temperature followed by annealing at 200 °C (solid phase epitaxy – SPE) and reactive deposition epitaxy (RDE) of Ge and Mg on Si at 200 °C. Optical properties of these structures were investigated in the photon energy range of 0.02–6.2 eV. Based on optical functions calculation, it was shown that SPE growth results in formation of a crystalline layer of Mg2Si, which exhibits a strong optical phonon originated from the substrate-film interface. In the case of RDE growth, the amount of Mg2Si is sufficiently lower, but Mg-Si-Ge compound phonon appears. The estimate of a fundamental indirect transition value in the film is 0.72 eV for SPE growth method and 0.56 eV for RDE due to the ternary compound Mg-Ge-Si at the film-substrate interface. © 2016 Trans Tech Publications, Switzerland.

关键词： Thin films

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Extended near-IR spectral sensitivity and electroluminescence properties of silicon diode structure with GaSb/Si composite layer 3rd

Extended near-IR spectral sensitivity and electroluminescenc...

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3rd Asian School-Conference on Physics and Technology of Nanostructured Materials, ASCO-Nanomat 2015

作者： Goroshko, Dmitry L. Shevlaygin, Alexander V. Chusovitin, Evgeniy A. Galkin, Konstantin N. Chernev, Igor M. Galkin, Nikolay G. Institute of Automation and Control Processes FEB RAS 5 Radio St. Vladivostok690041 Russia Far Eastern Federal University 8 Sukhanova St. Vladivostok690950 Russia

ISBN: (纸本)9783038356486

An array of GaSb nanocrystallites (NCs) was formed on Si(001) substrate by solid-phase epitaxy at 500 °C. Owing to the embedded GaSb NCs, p+-Si/NC-GaSb/n-Si mesa diode spectral sensitivity has extended up to 1.6 μm at room temperature, and its integral sensitivity has increased by 4–5% in the wavelength range of 1200–1600 nm, as compared to a conventional Si diode. This result was achieved by embedding only 10 nm of GaSb in the form of NCs inside a silicon matrix. In addition, we could obtain a significant electroluminescence (EL) signal at 120 K in a very wide wavelength range from 1.3 to 2.1 μm (0.95–0.59 eV). The EL spectrum has a broad maximum at 1700 nm (0.73 eV). The threshold pumping current density was as low as 0.75 A/cm2. © 2016 Trans Tech Publications, Switzerland.

关键词： Silicon

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System for Identifying Target Objects to Perform Manipulative Operations by Unmanned Underwater Vehicles

System for Identifying Target Objects to Perform Manipulativ...

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2022 International Conference on Ocean Studies, ICOS 2022

作者： Konoplin, Alexander Yurmanov, Alexander Krasavin, Nikita Piatavin, Pavel Panchuk, Maxim Vasilenko, Roman Institute of Marine Technology Problems Far Eastern Branch Ras Institute of Automation and Control Processes Far Eastern Branch of Ras Vladivostok Russia

ISBN: (纸本)9781665473729

The paper proposes a system for identifying target objects to perform manipulative operations by unmanned underwater vehicles (UUV) equipped with multi-link manipulators (MM). This system processes point clouds received from technical vision systems (TVS) mounted on UUV, and provides high-precision identification of the location and shape of target objects relative to the UUV. Then, the specified trajectories of the MM working tool are translated on the determined surface of the target object, taking into account the possible silting, fouling and deformation of this object. The developed system is implemented in the C++ programming language on the NVIDIA Jetson TX2 on-board computer. The results of recognition of underwater objects using a Zed2 stereo camera placed in a sealed box, calibrated in an aquatic environment using the OpenCV library method, are presented. The experimental data obtained were used to simulate the process of manipulation operation performed by the manipulator of the UUV in the software packages CoppeliaSim and Matlab/Simulink. The research results confirmed the operability and high efficiency of the proposed system. © 2022 IEEE.

关键词： MATLAB

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Identification of faults in nonlinear dynamic systems 26

Identification of faults in nonlinear dynamic systems

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26th DAAAM International Symposium on Intelligent Manufacturing and automation, DAAAM 2015

作者： Filaretov, Vladimir Zhirabok, Alexey Zuev, Alexander Protcenko, Alexander Far Eastern Federal University 8 Suhanova St. Vladivostok690950 Russia Institute for Automation and Control Processes FEB RAS 5 Radio St. Vladivostok690041 Russia

ISBN: (纸本)9783902734075

This paper considers a problem of fault detection, isolation and identification of its values in mechatronic systems described by nonlinear dynamic models. To solve this problem logic-dynamic approach and special feedback by residual signal is suggested. This approach consists of three main steps: replacing the initial nonlinear system by certain linear logic-dynamic system, obtaining the bank of linear logic-dynamic observers, and transforming these observes into the nonlinear ones. Logic-dynamic approach allows detecting and isolating faults in nonlinear dynamic systems by using the linear methods for diagnosis in nonlinear mechatronic systems. Feedback of special form introduced in the observers after the detection and isolation of faults. It is allows to determine the value of faults even in nonlinear systems with incomplete observability. The results of mathematical simulation fully confirm the efficiency and high performance of the proposed method.

关键词： Fault detection

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