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Undersea Buried Pipeline Reconstruction Based on the Level Set and Inverse Multiquadric Regularization Method

Journal of Ocean University of China 2022年第1期21卷 101-112页

作者： SHANG Wenjing XUE Wei XU Yidong MAKAROV sergey B LI Yingsong College of Information and Communication Engineering Harbin Engineering UniversityHarbin 150001China Key Laboratory of Advanced Marine Communication and Information Technology Ministry of Industry and Information TechnologyHarbin 150001China Yantai Research Institute and Graduate School of Harbin Engineering University Yantai 264006China Institute of Physics Nanotechnology and TelecommunicationsHigher School of Applied Physics and Space TechnologiesPeter the Great St.Petersburg Polytechnic UniversitySt.Petersburg 195251Russia

The electric inversion technique reconstructs the subsurface medium distribution from acquired *** the basis of electric inversion,objects buried under the earth or seabed,such as pipelines and unexploded ordnance,are detected and located in a contactless ***,the process of accurately reconstructing the shape of the target object is challenging because electric inversion is a nonlinear and ill-posed *** this work,we present an inverse multiquadric(IMQ)regularization method based on the level set function for reconstructing buried *** the case of locating underwater objects,the unknown inversion area is split into two parts,the background and the pipeline with known *** geometry of the pipeline is represented based on the level set function for achieving a noiseless inversion *** obtain a binary image,the IMQ is used as the regularization term,which‘pushes’the level set function away from *** also provide an appropriate method to select the bandwidth and regularization parameters for the IMQ regularization term,resulting in reconstructed images with sharp *** simulation results and analysis show that the proposed method performs better than classical inversion methods.

关键词： inverse problems level set function inverse multiquadric regularization method buried pipeline

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Complementary and alternative medicine in European countries legislative framework

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Traditional Medicine Research 2020年第3期5卷 125-135页

作者： Jovana Milenkovic sergey Bolevich Gvozden Rosic Department of Dentistry Faculty of Medical SciencesUniversity of KragujevacKragujevac 34000Serbia Department of Human Pathology I.M.Sechenov First Moscow State Medical University(Sechenov University)Moscow 119991Russia Department of Physiology Faculty of Medical SciencesUniversity of KragujevacKragujevac 34000Serbia

Complementary and alternative medicine(CAM)is a set of different diagnostic and therapeutic procedures,as well as the use of natural products for the treatment of patients,derived from previously known traditional methods and enriched with modern scientific *** present article reviews the available data regarding the use of CAM and the legislation behind it in European *** use of CAM is recorded in Europe as a whole and varies between 1070%of the population of individual European *** least 300,000 registered CAM providers have been identified in the European Union(EU),of which slightly more than half includes non-medical *** most practiced discipline is acupuncture,followed by *** regulation and legislation in Europe is not precisely defined and is constantly striving to find a common *** legal frameworks for CAM are not defined,each European country has its own regulations and *** order to define universal legislation for CAM,the EU created the CAMbrella project,a project of the EU designed to find a unique system that would include the treatment of CAM in *** to the data from CAMbrella,from 39 countries in the EU,17 have general CAM *** status of CAM in Europe is characterized by enormous heterogeneity in all aspects,including terminology,methods,prevalence and ultimately,legal status,regulations and legislation.

关键词： Complementary and alternative medicine European countries Methods of therapy Legal status Regulation Legislation

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Measuring Internal Velocity of Debris Flows by Temporally Correlated Shear Forces

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Journal of Earth Science 2012年第3期23卷 373-380页

作者：韦方强杨红娟胡凯衡 sergey Chernomorets Key Laboratory of Mountain Hazards and Earth Surface Process Chinese Academy of Sciences Institute of Mountain Hazards and Environment Chinese Academy of Sciences Faculty of Geography Moscow State UniversityMoscowRussia

Debris flow is a kind of geological hazard occurring in mountain *** velocity is very important for debris flow dynamics research and designing debris flow control ***,most of past researches focused on surface velocity and mean velocity of debris flow,while few researches involve its internal velocity because there is no available method for measuring the internal velocity for its destructive *** this paper,a method of temporally correlated shear forces（TCSF） for meas-uring the internal velocity of debris flows is *** principle of this method is to calculate the internal velocity of a debris flow using the distance between two detecting sections and the time differ-ence between the two waveforms of shear forces measured at both *** measuring method has been tested in 14 lab-based flume experiments.

关键词： debris flow internal velocity velocity measuring shear force flume experiment

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Identification of Proteins and Genes Associated with Hedgehog Signaling Pathway Involved in Neoplasm Formation Using Text-Mining Approach

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Big Data Mining and Analytics 2024年第1期7卷 107-130页

作者： Nadezhda Yu.Biziukova sergey M.Ivanov Oga A.Tarasova Department of Bioinformatics Institute of Biomedical ChemistryMoscow 119121Russia Department of Bioinformatics Pirogov Russian National Research Medical UniversityMoscow 117997Russia

Analysis of molecular mechanisms that lead to the development of various types of tumors is essential for biology and medicine,because it may help to find new therapeutic opportunities for cancer treatment and cure including personalized treatment *** of the pathways known to be important for the development of neoplastic diseases and pathological processes is the Hedgehog signaling pathway that normally controls human embryonic *** accumulation of various types of biological data,including interactions between proteins,regulation of genes transcription,proteomics,and metabolomics experiments results,allows the application of computational analysis of these big data for identification of key molecular mechanisms of certain diseases and pathologies and promising therapeutic *** aim of this study is to develop a computational approach for revealing associations between human proteins and genes interacting with the Hedgehog pathway components,as well as for identifying their roles in the development of various types of *** automatically collect sets of abstract texts from the NCBI PubMed bibliographic *** recognition of the Hedgehog pathway proteins and genes and neoplastic diseases we use a dictionary-based named entity recognition approach,while for all other proteins and genes machine learning method is *** association extraction,we develop a set of semantic *** complete the results of the text analysis with the gene set enrichment *** identified key pathways that may influence the Hedgehog pathway and their roles in tumor development are then verified using the information in the literature.

关键词： text-mining data mining Hedgehog pathway neoplastic processes enrichment analysis pathology molecularmechanisms

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Thin Film Lithium-Ionbatteries Crack Initiation Due to Thermal and Electric Effects

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Transactions of Nanjing University of Aeronautics and Astronautics 2014年第2期31卷 137-141页

作者： sergey Verlinski Lavrenti Shekyan Pier Marzocca Philip Yuya Faculty of Mechanics and Mechanical Engineering State Engineering University of Armenia Yerevan 0009 Republic of Armenial Mechanical and Aeronautical Engineering Department Clarkson University New York 13699USA

The transient and thermo-electric finite element analysis(FEA)of a 2Dlithium-on(Li-ion)battery is *** process of recharging and discharging of thin film lithium-ion(LiFePO4)battery in the presence of a transversal crack is numerically *** this process significant temperature load influences the behavior of the battery and thermal fields can affect the way crack propagates into the thin film *** simulations infer about relationship between temperature and electric field and their effect on crack propagation.A Li-ion battery model suitable for this investigation is implemented in the multi-physics software package by COMSOL Inc.,and it is extended to include the thermal and electrical *** and discussion are accompanied with pertinent conclusions.

关键词： LiFePO_(4) battery crack temperature and electric field COMSOL multiphysics

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Particles-induced turbulence: A critical review of physical concepts,numerical modelings and experimental investigations

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Theoretical & Applied Mechanics Letters 2020年第4期10卷 241-248页

作者： Guodong Gai Abdellah Hadjadj sergey Kudriakov Olivier Thomine DEN-DM2S-STMF CEAUniversitéParis-SaclayFrance University of Normandy INSACORIA UMR-6614 CNRS76000 RouenFrance

The presence of solid particles or water droplets in continuous fluid flow can either induce turbulence attenuation or amplification. The modification of the state of the turbulence depends on the characteristics of the particles, such as volume fraction, mean diameter, mass density, or carrier phase flow properties. In this brief review, the main physical concepts related to the most important physical aspects of turbulence modulation are summarized. Different criteria used to distinguish the enhancement or the attenuation effects of the particles on the carrier phase flows are recalled. For the interest of large-scale industrial applications, several theoretical,experimental and empirical approaches are discussed, which provides an interesting framework for the study of the effect of particles on turbulence behavior modification.

关键词： Particle-induced turbulence Turbulence modulation Physical and numerical modeling

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Experimental study on hybridization of a PV–TEG system for electrical performance enhancement using heat exchangers,energy,exergy and economic levelized cost of energy(LCOE)analysis

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Clean Energy 2023年第4期7卷 808-823页

作者： Mohammed A.Qasim Vladimir I.Velkin sergey E.Shcheklein Nuclear Power Plants and Renewable Energy Sources Department Ural Federal University620002 YekaterinburgRussia Department of Projects and Engineering Services Ministry of HealthBaghdad 10047Iraq

The concept of employing thermoelectric generators(TEGs)to recover energy from waste heat has gained popularity,with applications that range from milliwatt to kilowatt levels of output *** this study,a hybrid photovoltaic panel and thermoelectric generator(HPVTEG)system consisting of an integrated heat exchanger,a commercial polycrystalline silicon photovoltaic(PV)panel and a commercial bismuth telluride TEG was ***,TE components can be used to cool PV modules,increasing their output power via the Seebeck *** main finding is that the hybrid system has a reduced average temperature of 16.01°*** average power of the stand-alone PV panel is 28.06 W,but that of the HPVTEG system is 32.76 W,which is an increase of 4.7 *** conversion efficiency and power of the hybrid system increased by 16.7%and 16.4%,respectively,compared with a stand-alone PV *** HPVTEG system achieved an average exergy efficiency of 12.79%compared with 10.98%for a stand-alone PV *** to the calculation results,the levelized cost of energy(LCOE)of the stand-alone PV panel can range from 0.06741 to 0.10251 US$/kWh depending on how many days it is in operation,while the LCOE of the HPVTEG system can range from 0.06681 to 0.10160 US$/kWh.

关键词： PV TEG waste heat hybrid system heat exchanger

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Coarsening kinetics and strengthening mechanisms of core-shell nanoscale precipitates in Al-Li-Yb-Er-Sc-Zr alloy

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Journal of Materials Science & Technology 2021年第2期61卷 197-203页

作者： Yang Wang Shun Zhang Ruizhi Wu Nodir Turakhodjaev Legan Hou Jinghuai Zhang sergey Betsofen Key Laboratory of Superlight Materials&1 Surface Technology Ministry of EducationHarbin Engineering UniversityHarbin 150001China College of Science Heihe UniversityHeihe 164300China Department of Machine Building Tashkent State Technical UniversityTashkent 100056Uzbekistan Moscow Aviation Institute National Research UniversityMoscow 109383Russia

The tailored nanoparticles with a complex core/shell structure can satisfy a variety of demands, such as lattice misfit, shearability and coarsening resistance. In this research, core-shell nanoscale Al3(Yb, Er, Sc,Zr, Li) composite particles were precipitated in Al-2 Li-0.1 Yb-0.1 Er-0.1 Sc-0.1 Zr(wt%) alloy through the double-aging treatment, in which the core was(Yb, Er, Sc, Zr)-rich formed at 300°C and the shell was Li-rich formed at 150°C. The coarsening kinetics and precipitate size distributions(PSDs) of Al3(Yb, Er, Sc,Zr, Li) particles aged at 150°C previously aged at 300°C for 24 h showed a better fit to the relation of 2∝ kt and normal distribution, indicating that the coarsening of precipitates was controlled by interface reaction, not diffusion. The Orowan bypass strengthening was operative mechanism at 150°C.

关键词： Al-Li alloys Aging Core-shell structure Coarsening kinetics Strengthening mechanisms

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Investigation of WZ Sge-type Dwarf Nova ASASSN-19oc:Optical Spectroscopy and Multicolor Light Curve Analysis

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Research in Astronomy and Astrophysics 2024年第8期24卷 20-31页

作者： Viktoriia Krushevska sergey Shugarov Paolo Ochner Yuliana Kuznyetsova Mykola Petrov Peter Kroll Astronomical Institute of the Slovak Academy of Sciences Tatranska Lomnica05960 VysokéTatrySlovakia Main Astronomical Observatory of NAS of Ukraine 27 Akademika Zabolotnoho St.03143 KyivUkraine INAF—Osservatorio Astronomico di Padova Vicolo dell’Osservatorio 5I-35122 PadovaItaly Department of Physics and Astronomy University of PadovaVia F.Marzolo 8I-35131 PadovaItaly Max Planck Computing and Data Facility(MPCDF) Gießenbachstrasse 2D-85748 GarchingGermany Sonneberg Observatory Sternwartestr.32D-96515 SonnebergGermany

In this study,we present an investigation of the newly discovered dwarf nova ASASSN-19oc during its superoutburst on 2019 June *** carried out detailed UBVRcIc-photometric observations and also obtained a spectrum on day 7 of the outburst,which shows the presence of hydrogen absorption lines commonly found in dwarf nova *** of photometric data reveals the occurrence of early superhumps in the initial days of observations,followed by ordinary and late *** have accurately calculated the period of the ordinary superhumps as Pord=0.05681(10)days and determined the periods at different stages,as well as the rate of change of the superhump period(P_(dot)=(5)P/P=8.1×10^(-5)).Additionally,we have derived the mass ratio of the components(q=0.09),and estimated the color temperature during the outburst as~11,000 K,the distance to the system(d=560 pc)and absolute magnitude of the system in outburst(MV=5.3).We have shown that outbursts of this star are very rare:based on brightness measurements on 600 archival photographic plates,we found only one outburst that occurred in *** fact,as well as the properties listed above,convincingly shows that the variable ASASSN-19oc is a dwarf nova of WZ Sge type.

关键词： (stars)binaries(including multiple) close-(stars)novae-cataclysmic variables-stars dwarf novae

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Investigation into the operation of an autothermal two-section subbituminous coal fluidized bed gasifier

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International Journal of Coal Science & Technology 2023年第3期10卷 190-203页

作者： Nikolay Abaimov Alexander Ryzhkov Alexey Dubinin Lu Ding Vladimir Tuponogov sergey Alekseenko Ural Federal University EkaterinburgRussia 6200022 Institute of Clean Coal Technology East China University of Science and TechnologyShanghai 200237China Institute of Thermophysics Siberian BranchRussian Academy of SciencesNovosibirskRussia 630090

Using a newly developed experimental setup,the features and advantages of an autothermal single-casing atmospheric sub-bituminous coal fluidized bed air-blown gasifier,combining a combustion and gasification section,and mixing the dispersed phase(inert material,char)and heat exchange between them through an annular transfer device,have been *** increase the efficiency of the gasifier,an experimental-computational method was developed find the conditions for optimal operation,combining changing the annular flow's geometry and regulating the primary air for gasification.A simple and reliable multizone thermodynamic calculation model makes it possible to predict the composition of char and syngas in the gasification section with acceptable *** method confirmed that a two-section fluidized bed gasifier can provide efficient gasification of solid fuels and is suitable for use in small-scale cogeneration *** with a heating value of 3.6-4.5 MJ/m^(3)and CGE of 38.2%-42.3%was obtained in the experimental setup without optimizing the primary air flow *** optimization,the indicators increased to the heating value of syngas of 5.20-5.34 MJ/m^(3)and CGE of 42.5%-50.0%.With heat regeneration of 0.8,CGE increases to 70%.

关键词： Coal Syngas Gasification Bubbling fluidized bed Thermodynamics Modeling

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