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Journal of Semiconductors 2024年第8期45卷 25-33页

作者： Fedor I.Manyakhin dmitry o.varlamov Vladimir P.Krylov Lyudmila o.Morketsova Arkady A.Skvortsov Vladimir K.Nikolaev Dinamics Strength of Machines and Resisance of MaterialsMoscow Polytechnic UniversityRussia Biomedical and Electronic Means and Technologies Vladimir State UniversityRussia Computer-Aided Design and Engineering National University of Science and Technology"MISiS"Russia

Herein,a physical and mathematical model of the voltage−current characteristics of a p−n heterostructure with quantum wells(QWs)is prepared using the Sah−Noyce−Shockley(SNS)recombination mechanism to show the SNS recombination rate of the correction function of the distribution of QWs in the space charge region of diode configuration.A comparison of the model voltage−current characteristics(VCCs)with the experimental ones reveals their *** technological parameters of the structure of the VCC model are determined experimentally using a nondestructive capacitive approach for determining the impurity distribution profile in the active region of the diode structure with a profile depth resolution of up to 10Å.The correction function in the expression of the recombination rate shows the possibility of determining the derivative of the VCCs of structures with QWs with a nonideality factor of up to 4.

关键词： light-emitting diodes with quantum wells voltage−current relation nonideality factor recombination mechanism Sah−Noyce−Shockley model

A New Generation of Rules-based Approach:Mivar-based Intelligent Planning of Robot Actions(MIPRA)and Brains for Autonomous Robots

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Machine Intelligence Research 2024年第5期21卷 919-940页

作者： oleg varlamov dmitry Aladin Department of Information Processing and Management Systems RI MIVARBauman Moscow State Tchnical University(BMSTU)Moscow105005Russian Federation

To create autonomous robots,both hardware and software are *** enormous progress has already been made in the field of equipment,then robot software depends on the development of artificial *** article proposes a solution for creating“logical”brains for autonomous robots,namely,an approach for creating an intelligent robot action planner based on Mivar expert *** application of this approach provides opportunities to reduce the computational complexity of solving planning problems and the requirements for the computational characteristics of hardware platforms on which intelligent planning systems are *** theoretically and practically justify the expediency of using logically solving systems,in particular Mivar expert systems,to create intelligent planners,the MIPRA(Mivar-based Intelligent Planning of Robot Actions)planner was created to solve problems such as STRIPS for permutation cubes in the Blocks World *** planner is based on the platform for creating expert systems of the *** a result,the Mivar planner can process information about the state of the subject area based on the analysis of cause-effect relationships and an algorithm for automatically constructing logical inference(finding a solution from“Given”to“Find”).Moreover,an important feature of the MIPRA is that the system is built on the principles of a“white box”,due to which the system can explain any of its decisions and provide justification for the actions performed in the form of a retrospective of the stages of the decision-making *** preparing a set of robot actions aimed at changing control objects,expert knowledge is used,which is the basis for the functioning algorithms of the *** approach makes it possible to include an expert in the process of organizing the work of the intelligent planner and use existing knowledge about the subject *** experiments of this study have shown that instead of many hours and powerfu

关键词： Autonomous robot blocks world decision-making system expert systems intelligent planning

Alternative Strategy for Development of Dielectric Calcium Copper Titanate‑Based Electrolytes for Low‑Temperature Solid oxide Fuel Cells

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Nano-Micro Letters 2025年第1期17卷 310-332页

作者： Sajid Rauf Muhammad Bilal Hanif Zuhra Tayyab Matej Veis MAKYousaf Shah Naveed Mushtaq dmitry Medvedev Yibin Tian Chen Xia Martin Motola Bin Zhu College of Mechatronics and Control Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China Department of Inorganic Chemistry Faculty of Natural SciencesComenius University BratislavaIlkovicova684215 BratislavaSlovakia Energy Storage Joint Research Center School of Energy and EnvironmentSoutheast UniversityNanjing 210096People’s Republic of China Hydrogen Energy Laboratory Ural Federal University620002 EkaterinburgRussia Laboratory of Electrochemical Devices Based on Solid oxide Proton Electrolytes Institute of High Temperature Electrochemistry620066 EkaterinburgRussia School of Microelectronics Hubei UniversityWuhan 430062People’s Republic of China

The development of low-temperature solid oxide fuel cells(LT-SoFCs)is of significant importance for realizing the widespread application of *** has stimulated a substantial materials research effort in developing high oxide-ion conductivity in the electrolyte layer of *** this context,for the first time,a dielectric material,CaCu_(3)Ti_(4)o_(12)(CCTo)is designed for LT-SoFCs electrolyte application in this *** individual CCTo and its heterostructure materials with a p-type Ni_(0.8)Co_(0.15)Al_(0.05)Lio_(2−δ)(NCAL)semiconductor are evaluated as alternative electrolytes in LT-SoFC at 450–550℃.The single cell with the individual CCTo electrolyte exhibits a power output of approximately 263 mW cm^(-2) and an open-circuit voltage(oCV)of 0.95 V at 550℃,while the cell with the CCTo–NCAL heterostructure electrolyte capably delivers an improved power output of approximately 605 mW cm^(-2) along with a higher oCV over 1.0 V,which indicates the introduction of high hole-conducting NCAL into the CCTo could enhance the cell performance rather than inducing any potential short-circuiting *** is found that these promising outcomes are due to the interplay of the dielectric material,its structure,and overall properties that led to improve electrochemical mechanism in CCTo–***,density functional theory calculations provide the detailed information about the electronic and structural properties of the CCTo and NCAL and their heterostructure CCTo–*** study thus provides a new approach for developing new advanced electrolytes for LT-SoFCs.

关键词： LT-SoFCs Dielectric CaCu_(3)Ti_(4)o_(12) Semiconductor Ni_(0.8)Co_(0.15)Al_(0.05)Lio_(2−δ) Ionic conductivity Heterostructure electrolyte

Choosing configurations of transmission line tower grounding by back flashover probability value

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Frontiers in Energy 2016年第2期10卷 213-226页

作者： dmitry KUKLIN Centre for Physical and Technological Problems of Energy in NorthemAreas Apatity 184209 Russia

There is a considerable number of works devoted to electrical characteristics of grounding. These characteristics are important in general. However, in application to grounding of transmission line towers they are not enough to determine what grounding construction is preferable in some particular case, because these characteristics are calculated or measured apart from the grounded object, and only limited number of current （or voltage） source waveforms is used. This paper indicates reasons in favor of the fact that to choose the optimum design of grounding, the calculation model should include the tower as it is. The probability of back flashover, which provides both qualitative and quantitative estimate of the grounding structure efficiency, can be taken as the criterion for the grounding design. The insulation flashover probability is calculated on the basis of engineering method, which evaluates breakdown strength of insulation for nonstandard waveshapes, and probability data on lightning currents. Different approaches are examined for identifying the back flashover probability, as not only amplitudes but also other parameters can be taken into account. Finite-difference time-domain method is used for calculations of transients. It is found that lightning current waveform can greatly influence calculated back flashover probability value.

关键词： grounding transmission line tower back flashover probability FDTD method

E-beam generation in discharges initiated by voltage pulses with a rise time of 200 ns at an air pressure of 12.5-100 kPa

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Plasma Science and Technology 2019年第4期21卷 52-60页

作者： Victor TARASENKo dmitry BELoPLoToV Mikhail LoMAEV dmitry SoRoKIN Institute of High Current Electronics Siberian Bran ch.Russian Academy of Sciences.Tomsk&34055.Russia National Research Tomsk State University.Tomsk 634050 Russia

The effect of air pressure(12.5,25,50,and 100 kPa)on the gen eration of runaway electron beams in a non-uniform electric field when applying voltage pulses(~35 kV)with a rise time of?200 ns has been *** results show that the discharge has various stages:streamer,diffuse,and ***,a wide streamer develops in the gap and a diffuse discharge is formed.A spark is formed u 100 ns after the *** current pulse of a supershort avalanche electron beam(SAEB)was measured with a collector at various pressures of *** show that there are two modes of generation of run away *** an air pressure of 25-100 kPa,a single SAEB current pulse with a full width at half-maximum(FWHM)of 120-140 ps is *** the air pressure of 12.5 kPa,two current pulses of the electron beam are *** of the first and second current pulses are ul40ps and u300 ps,*** current pulse amplitude of the second electron beam is higher than that of the first one,but the electron energy is less.

关键词： diffuse discharge runaway electrons streamer breakdown displacement current

Simulation of Combustion Flow of Methane Gas in a Premixed Low-Swirl Burner using a Partially Premixed Combustion Model

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Journal of Thermal Science 2022年第5期31卷 1663-1681页

作者： XIAo Caiyuan oMIDI Milad SURENDAR A. ALIZADEH As'ad BoKoV dmitry o. BINYAMIN ToGHRAIE Davood Key Laboratory of Hunan Province for Efficient Power System and Intelligent Manufacturing Shaoyang422000China College of Mechanical and Energy Engineering Shaoyang UniversityShaoyang422000China Department of Mechanical Engineering Khomeinishahr BranchIslamic Azad UniversityKhomeinishahr119/84175Iran Department of Pharmacology Saveetha dental College and hospitalSaveetha institute of medical and technical sciencesChennai602105India Faculty of Engineering Soran UniversitySoran651Iraq Department of Mechanical Engineering College of EngineeringUniversity of ZakhoZakho1653654Iraq Institute of Pharmacy Sechenov First Moscow State Medical UniversityMoscow119991Russian Federation Department of Mechanical Engineering Faculty of Science and TechnologyUniversitas Muhammadiyah Kalimantan TimurSamarinda75124Indonesia

Because the rotational current stabilizes the flame by creating a recirculation zone,it may increase the risk of *** this reason,low-spin combustion is used to stabilize the flame while preventing ***,in this study,the combustion flow of methane gas in a low-swirl burner is simulated using a partially premixed combustion ***,the fuel flow rate is considered *** research parameters include swirl angle(θ=35°–47°),equivalence ratio(φ=0.6–0.9)and inlet axial flow radius(R=0.6–0.7)and effect of these parameters on temperature distribution,flame length,flame rise length,velocity field,and streamlines of the number of pollutant species are *** contours of streamline,temperature distribution,and velocity distribution are also presented for analysis of flow *** results show that with increasing the fuel-air ratio,the strength of the axial flow decreases,and the position of the maximum flame temperature shifts toward the inlet of the *** results also reveal that by increasing the swirl angle of the flow,the position of the minimum velocity value(opposite to the direction of the axis)tends towards the *** results also indicate that the maximum temperature of the combustion chamber increases with increasing the swirl angle,and inθ=35°,the maximum temperature is 1711℃and inθ=41°,this value is 1812℃.Finally,by increasing the swirl angle toθ=47°,the maximum flame temperature position is found at a considerable distance from the inlet and is 1842℃.

关键词： swirl burner numerical simulation axial velocity premixed combustion V-shaped flame

Adhesion at friction and wear

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Friction 2022年第11期10卷 1859-1878页

作者： dmitry P.MARKoV Research Institute of Railway Transport Moscow 129851Russia

our understanding of the surrounding world,from friction to the origin of life,depends on how we imagine the contact interaction of condensed *** are the forces acting in contact with solids?Do they attract(adhesive)or repel(dehesive)?Theory and research at the atomic–molecular level have shown that the force are adhesive,but everyday experiences cast doubt on this *** article addresses this issue by considering the mistakes made in experimental and theoretical tribology and surface *** into account the theories of hybridization and dehybridization of electron orbitals and valence bonds,the views on the structure of the surfaces of condensed bodies and the force arising during contact interaction are *** influence of van der Waals,hydrogen,covalent,metallic,and ionic bonds on the properties of lubricants is *** contours of the dehesive–deformation theory of friction and wear are also outlined.

关键词： atomic and molecular interactions adhesion cohesion dehesion friction wear

Positive and negative streamers in air and nitrogen in a sharply inhomogeneous electric field under conditions of runaway electron generation

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High Voltage 2023年第3期8卷 527-537页

作者： dmitry Beloplotov Victor Tarasenko dmitry Sorokin Cheng Zhang Tao Shao Institute of High Current Electronics Siberian Branch of the Russian Academy of ScienceTomskRussia Beijing International S&T Cooperation Base for Plasma Science and Energy Conversion Institute of Electrical EngineeringChinese Academy of SciencesBeijingChina

The development of positive and negative streamers in a point-to-plane gap filled with air and nitrogen at various pressures(50-200 kPa)and voltages(8-25 kV)was studied.A four-channel intensified charge-coupled device(ICCD)and a streak-camera were *** parameters were measured with high resolution(10 GHz).An original method of measuring a displacement current caused by a streamer was *** was expected,positive streamer branches in nitrogen at low voltages and/or elevated pressures while a large-diameter streamer is formed in ***,at high voltages or negative polarity,the large-diameter streamer is formed both in nitrogen and air in the entire pressure *** was found that runaway electrons(REs)are generated in the very first picoseconds of gas ionisation near the pointed *** was assumed that REs can be generated near the pointed anode and produce bremsstrahlung radiation due to a sharply inhomogeneous distribution of electrical *** was found that in the final stage of negative streamer development in air and nitrogen,the gas between the streamer front and the opposite electrode is ionised almost simultaneously in the entire volume when the streamer diameter is almost equal to the interelectrode gap.

关键词： sharply inhomogeneous electrode

Medical images classification for skin cancer using quantitative image features with optical coherence tomography

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Journal of Innovative optical Health Sciences 2016年第2期9卷 8-16页

作者： Wei Gao Valery P.Zakharov oleg o.Myakinin Ivan A.Bratchenko dmitry N.Artemyev dmitry V.Kornilin Department of Laser and Biotechnical Systems Samara State Aerospace University

optical coherence tomography(oCT)is employed in the diagnosis of skin ***,quantitative image features extracted from oCT images might be used as indicators to classify the skin *** the present paper,we investigated intensity-based,texture-based and fractalbased features for automatically classifying the melanomas,basal cell carcinomas and pigment *** estimating equations were used to test for differences between the skin tumors.A modified p value ofonsidered statistically *** increase of mean and median of intensity and significant decrease of mean and median of absolute gradient were observed in basal cell carcinomas and pigment nevi as compared with *** decrease of contrast,entropy and fractal dimension was also observed in basal cell carcinomas and pigment nevi as compared with *** results suggest that the selected quantitative image features of oCT images could provide useful information to differentiate basal cell carcinomas and pigment nevi from the *** research is warranted to determine how this approach may be used to improve the classification of skin tumors.

关键词： optical coherence tomography skin tumor texture analysis fractal analysis differentiate box counting

Formation of diffuse and spark discharges between two needle electrodes with the scattering of particles

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Plasma Science and Technology 2024年第9期26卷 32-39页

作者： Victor F TARASENKo dmitry V BELoPLoToV Alexei N PANCHENKo dmitry A SoRoKIN Institute of High Current Electronics Siberian BranchRussian Academy of SciencesTomsk 634055Russia National Research Tomsk State University Tomsk 634050Russia

The development of a nanosecond discharge in a pin-to-pin gap filled with air at atmospheric pressure has been studied with high temporal and spatial resolutions from a breakdown start to the spark *** and negative nanosecond voltage pulses with an amplitude of tens of kilovolts were ***-resolved images of the discharge development were taken with a fourchannel Intensified Charge Coupled Device(ICCD)*** minimum delay between the camera channels could be as short as≈0.1 *** made it possible to study the gap breakdown process with subnanosecond *** was observed that a wide-diameter streamer develops from the high-voltage pointed *** ionization processes near the grounded pin electrode started when the streamer crossed half of the *** bridging the gap by the streamer,a diffuse discharge was *** development of spark leaders from bright spots on the surface of the pointed electrodes was observed at the next *** was found that the rate of development of the spark leader is an order of magnitude lower than that of the wide-diameter *** thin luminous tracks were observed against the background of a discharge plasma *** has been established that the tracks are adjacent to brightly glowing spots on the electrodes and are associated with the flight of small particles.

关键词： needle electrodes short voltage pulses atmospheric air streamer breakdown diffuse and spark discharges scattering metal particles