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2024 International Conference Laser Optics, ICLO 2024

作者： Kamshilin, Alexei A. Institute of Automation and Control Processes Feb Ras Laboratory 24 Vladivostok Russia

ISBN: (纸本)9798350390674

In this work, responses of cortical vessels to the administration of a metabolic agent were measured in rats using contactless imaging photoplethysmography and laser speckle contrast imaging systems providing full field of view visualization of the blood flow. It was found that blood-flow changes detected by two systems differ significantly due to different nature of the interaction of light with tissues underlying these methods. © 2024 IEEE.

关键词： Photoplethysmography

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Comparison of Structure, Transport Properties and Thermoelectric Power Efficiency of Thin CrSi and CoSi Films on Si(111) and Si(100) Substrates

Comparison of Structure, Transport Properties and Thermoelec...

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2024 International Conference on Electrical Engineering and Photonics, EExPolytech 2024

作者： Goroshko, Dmitrii L. Galkin, Konstantin N. Subbotin, Evgenii. Yu. Goroshko, Olga A. Balagan, Semen A. Maslov, Andrey M. Chernev, Igor M. Kropachev, Oleg V. Khoroshilov, Dmitrii A. Dotsenko, Sergei A. Galkin, Nikolay G. Institute of Automation and Control Processes of Feb Ras Optics and Electrophysics Laboratory Vladivostok Russia

ISBN: (纸本)9798350388879

The paper compares the formation conditions, crystal structure, conductivity, and thermoelectric properties of thin CrSi and CoSi films on silicon substrates with (111) and (100) orientations. It is found that, despite the insufficiently good conductivity, the films have a noticeable Seebeck coefficient (up to 70 μV/K) in the temperature range of 200-450 K: positive for CrSi and negative for CoSi. The maximum power factor is estimated at 2 to 3 mW/(m2×K). For CoSi, first-principles calculations of the phonon structure and lattice thermal conductivity are performed, including in the form of nanowires. Estimates are made for the achievable dimensionless thermoelectric figure of merit of CoSi thin films: ZT=0.40-0.50 T=200-450 K. © 2024 IEEE.

关键词： Crystal orientation

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Formation, Phonon Structure, Transport and Thermoelectric Properties of Multilayer Heterostructures Si/NC β-FeSi2/Si/ NC β-FeSi2/.../Si(111) and Si/NC α-FeSi2/Si/ NC α-FeSi2/.../Si(111)

Formation, Phonon Structure, Transport and Thermoelectric Pr...

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2024 International Conference on Electrical Engineering and Photonics, EExPolytech 2024

作者： Galkin, Konstantin N. Kropachev, Oleg V. Goroshko, Olga A. Subbotin, Evgenii. Yu. Chernev, Igor M. Khoroshilov, Dmitrii A. Goroshko, Dmitrii L. Galkin, Nikolay G. Institute of Automation and Control Processes of Feb Ras Optics and Electrophysics Laboratory Vladivostok Russia

ISBN: (纸本)9798350388879

Multilayer (4 and 8 layers) samples with embedded β-FeSi2 and α-FeSi2 nanocrystals (NCs) on silicon-on-insulator (SOI) substrates with (100) orientation and p-type conductivity have been grown. It has been established from Raman data that β-FeSi2 NCs are formed with small portions of iron (0.5 nm) deposited at room temperature and annealed at T = 630°C with subsequent overgrowing with silicon, and α-FeSi2 NCs are formed after short-term annealing at T = 1000°C and overgrowing with silicon. The effect of doping of intermediate silicon layers on the conductivity and Seebeck coefficient in multilayers (4 and 8) in the temperature range of 80-450 K was studied. It was shown that with maximum doping of intermediate layers (1019 cm-3) with the number of layers equal to 8, the maximum Seebeck coefficient 600 μV/K and the maximum power factor 2.5 mW/(m×K2) were observed at T= 450 K, which is due to the contribution of injected holes from β-FeSi2 nanocrystals. © 2024 IEEE.

关键词： Silicon on insulator technology

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AUV Inspection of Subsea Pipelines Using Information from an Onboard Stereo Camera

AUV Inspection of Subsea Pipelines Using Information from an...

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2024 International Conference on Ocean Studies, ICOS 2024

作者： Bobkov, Valery Morozov, Mikhail Inzartsev, Alexander Panin, Mikhail Institute of Automation and Control Processes Far Eastern Branch RAS Vladivostok Russia M.D. Ageev Institute of Marine Technology Problems Far Eastern Branch RAS Institute of Automation and Control Processes Vladivostok Russia

ISBN: (纸本)9798331532307

Inspection of underwater pipelines (UP) condition by means of autonomous underwater vehicles (AUVs) requires high precision of vehicle localization relative to UP. One of the possible solutions to the problem is recognition of UP using the optical images from AUV onboard stereocamera. Applied in this work method is based on recognition of visible borders at 2D photographs with subsequent recovery of spatial parameters of a scene, including location and orientation of UP in AUVcentered coordinate system. Computational experiments were conducted to test the presented methods. They consisted of debugging the model of the AUV behavior during the inspection of UP, evaluating the effectiveness of the developed methods on virtual scenes, as well as on the real data obtained by a monocamera via the AUV tracking along pipeline. The results of estimating the accuracy of UP localization on real data and also in computational experiments have shown that proposed methods could provide the required navigation accuracy of the AUV relative to pipeline during inspection. © 2024 IEEE.

关键词： Autonomous underwater vehicles

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Mathematical Models and Algorithms of the Onboard Multiposition Integrated Inertial-Satellite Motion Detection System 30

Mathematical Models and Algorithms of the Onboard Multiposit...

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30th Saint Petersburg International Conference on Integrated Navigation Systems, ICINS 2023

作者： Shurygin, A.V. Institute of Automation and Control Processes FEB RAS Vladivostok Russia

ISBN: (纸本)9785919950950

The report outlines the problems of assimilation of navigation information delivered by spaced on-board sensors for satellite positioning of a moving object (technological platform) combined with three-component specific force vector meters (3D newtonometers). The main mathematical constructions follow the "state-measurement"paradigm and are focused on solving the inverse problems of determining the movement of technological platform as a solid body. An ellipsoidal system and other coordinate systems that determine solutions are selected as the base coordinate system. Algorithms for calculating kinematic parameters and spatial orientation of technological platform, characteristics of motion causality-forces and moments are presented. A numerical solution to the problem of vector gravimetry is proposed. An original digital test stand of the system for assimilating integrated satellite and inertial navigation information has been developed. © 2023 Concern CSRI Elektropribor, JSC.

关键词： Inverse problems

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A Method for Underwater Pipeline Tracking from Stereo Images

A Method for Underwater Pipeline Tracking from Stereo Images

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2024 International Conference on Ocean Studies, ICOS 2024

作者： Bobkov, Valeriy Shupikova, Antonina Inzartsev, Alexander Institute of Automation and Control Processes Far Eastern Branch RAS Vladivostok Russia Institute of Automation and Control Processes Far Eastern Branch RAS M. D. Ageev Institute of Marine Technology Problems Vladivostok Russia

ISBN: (纸本)9798331532307

In this article, we consider the issue of underwater pipeline (UP) inspection with an autonomous underwater vehicle. As part of the unified approach to addressing the problem of UP tracking, we propose a number of methods based on processing of stereo images to recognize and calculate the position of UP;describe the developed technique of image vectorization and a computationally cost-effective modification of the Hough algorithm;and propose a method for UP tracking based on search for the centerline of the current UP segment using the validation criteria of fixed solution. The reliability criterion is based on analysis of generated 3D points of a scene. The analysis was carried out and comparative estimates of the developed algorithms were obtained in experiments with simulated and actual data. The advantage of methods using 3D point cloud analysis from stereo images over vectorization methods in terms of both accuracy and speed of data processing is shown for the UP tracking problem. © 2024 IEEE.

关键词： Stereo image processing

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Nonparametric Soft Sensor Development for Distillation-In-Series Unit

Nonparametric Soft Sensor Development for Distillation-In-Se...

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2024 International Conference on Industrial Engineering, Applications and Manufacturing, ICIEAM 2024

作者： Mozharovskii, Igor Shevlyagina, Svetlana Institute Of Automation And Control Processes Feb Ras Vladivostok Russia Vladivostok State University Vladivostok Russia

ISBN: (纸本)9798350395013

Oil refining is an energy-intensive process that continuously separates petroleum products. Refining companies are interested in products that meet all regulations and the efficiency of their production. It is possible to achieve cost minimization and increase the quality of the output product by using accurate soft sensors that can reliably predict the quality of the output product in real time. In this regard, research on the construction of reliable soft sensors in industrial production is necessary and relevant. To improve the estimation capability, the alternating conditional expectation algorithm, which is based on nonparametric optimal transformations, was used for nonparametric soft sensor design. As a result, the designed nonparametric soft sensor shows a better efficiency in predicting the quality index of the target distillation product with a significantly reduced root mean square error compared to multiple linear regression analysis. © 2024 IEEE.

关键词： Distillation

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SMART Standards for Industry 1

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8th International Scientific Conference on Intelligent Information Technologies for Industry, IITI 2024

作者： Gribova, Valeriya Shalfeeva, Elena Institute of Automation and Control Processes FEB RAS Vladivostok Russia Far Eastern Federal University Vladivostok Russia

ISBN: (数字)9783031776885

ISBN: (纸本)9783031776878

An urgent task for all areas of industry is to create documents with machine-readable content (SMART-standards) that can be analyzed not only by domain specialists, but also software services for solving various professional tasks in the Industry. Such documents should be equally understandable to both experts and software systems, which is generally a contradiction. The presence of a textual, i.e. human-readable document with its subsequent translation into a machine-understandable representation is quite a difficult task due to the presence of complex semantic connections in the domain. Modern methods of natural language analysis, including Large Language Models (LLM), are not able to accurately solve this problem. Therefore, an critical task is to develop new methods and approaches to ensure human and machine comprehension while minimizing possible errors when translating from one representation to another. The purpose of this work is to describe an approach for creating and translating into a machine-understandable representation of regulatory documents of the Industry for their further use in software services and systems. The authors propose a new approach for representing normative documents as two-level graphs of knowledge. LLM models, supplemented by a specialized adapter obtained as a result of additional training, serve as the basis for ensuring the transformation of one form into another form. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

关键词： Knowledge graph

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Spatial and fine energy structure of indirect exciton

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The European Physical Journal B 2025年第1期98卷 1-9页

作者： Dzyuba, V. P. Vitrik, O. B. Institute of Automation and Control Processes of FEB RAS Vladivostok Russia

Quantum states of a spatially indirect exciton (IX), including its binding energy, are largely determined by the geometry of the spatial quantum structure consisting of (IX) and the interface (IXI). Unfortunately, this fact has been poorly studied both experimentally and theoretically. In this paper, the parameters of the IXI geometry and their effect on the IX binding energy spectrum are analytically investigated for the first time. For this purpose, the potential of the Coulomb interaction of an electron and a hole is determined using the image method. It is shown that the geometry parameters are quantized, and the effective permittivity of the interface becomes dependent on the orbital and magnetic quantum numbers of IX. A nonlinear dependence of the IX binding energy on the geometric parameters is observed. All these manifestations of the geometry are accessible to experimental observation. Each geometry has its own quantum states. This opens up the possibility of using IXI in exciton spectroscopy of the interface layer. The controllability of the IXI geometry by polarized light allows us to hope for using quantum geometric states of IX as qubits. In this work, various geometric states IX of two planar heterostructures SiO2/Si3N4 and GaAs/CdSe were modeled as an example.

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Femtosecond-laser nanostructuring of silicon thin films for optical information encryption 9

Femtosecond-laser nanostructuring of silicon thin films for ...

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Nanophotonics and Micro/Nano Optics IX 2023

作者： Syubaev, Sergey Institute of Automation and Control Processes FEB RAS 5 Radio Str. Vladivostok Russia

ISBN: (纸本)9781510667952

Pulsed laser processing matures as a powerful technique for flexible and high-performing nanostructuration. Rich physics behind the light-matter interaction allows to produce unique surface nanotextures with desired properties, beneficial for various practically-relevant applications such as optical sensing, anti-counterfeiting, realization of nanophotonic platforms and so on. Here we have applied direct femtosecond-laser printing to locally fabricate nanostructures on glass-supported amorphous-silicon thin film for realization of high-resolution (up to 60 000 dots per inch) security labels offering full-optical information encryption in several ways. Since the proposed tag represents array of close-packed amorphous-silicon hemispherical nanoparticles, the first approach for information encryption is to selectively crystallize some of nanoparticles by continuous-wave laser irradiation without morphological changes. Thus, crystalized nanoparticles ordered in a user-defined way indicate encrypted information that can be read using Raman signal intensity mapping at frequency of 519 cm−1, corresponding to the main phonon mode of crystalline silicon. The second way is to hide Mie-resonant nanoparticles between non-resonant ones. Since the latter haven’t proper size to resonantly interact with pump radiation during Raman signal mapping, encrypted information can be revealed via evident variation in Raman yield between resonant and non-resonant nanoparticles. Thereby, we demonstrated facile single step printing of anti-counterfeiting labels at resolution up to 60 000 dots per inch justifying the applicability of the developed approach for optical information encryption. © 2023 SPIE. All rights reserved.

关键词： Thin films

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