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Segmental closure of the Mongol-Okhotsk Ocean:Insight from detrital geochronology in the East Transbaikalia Basin

Geoscience Frontiers 2022年第1期13卷 15-27页

作者： Anastasia V.Arzhannikova Elena I.Demonterova Marc Jolivet Ekaterina A.Mikheeva Alexei V.ivanov Sergey G.Arzhannikov Valentin B.Khubanov Vadim S.Kamenetsky Institute of the Earth’s Crust Russian Academy of SciencesSiberian BranchIrkutskRussia Laboratoire Géosciences Rennes CNRS-UMR6118Universitéde RennesRennesFrance Geological Institute Russian Academy of SciencesSiberian BranchUlan-UdeRussia

The Late Paleozoic–Early Mesozoic Mongol-Okhotsk Ocean extended between the Siberian and Amur–North China *** timing and modalities of the oceanic closure are widely *** is largely accepted that the ocean closed in a scissor-like manner from southwest to northeast(in modern coordinates),though the timing of this process remains *** studies have shown that both western(West Transbaikalia)and eastern(Dzhagda)parts of the ocean closed almost simultaneously at the Early–Middle Jurassic ***,little information on the key central part of the oceanic suture zone is *** performed U-Pb(LA-ICP-MS)dating of detrital zircon from wellcharacterized stratigraphic sections of the central part of the Mongol-Okhotsk suture *** include the initial marine and final continental sequences of the East Transbaikalia Basin,deposited on the northern Argun-Idemeg terrane *** provide new stratigraphic ages for the marine and continental *** revised chronostratigraphy allows assigning an age of~165–155 Ma,to the collisionrelated flexure of the northern Argun-Idemeg terrane and the development of a peripheral foreland *** collisional process took place 5 to10 million years later than in the western and eastern parts of the *** demonstrate that the northern Argun-Idemeg terrane was the last block to collide with the Siberian continent,challenging the widely supported scissor-like model of closure of the MongolOkhotsk *** segments of the ocean closed independently,depending on the initial shape of the paleo continental margins.

关键词： Detrital zircon U-Pb geochronology Mongol-Okhotsk collision East Transbaikalian Basin

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Dirac operator on the sphere with attached wires

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Chinese Physics B 2016年第4期25卷 335-338页

作者： E N Grishanov D A Eremin D A ivanov I Yu Popov Ogarev Mordovia State University Bolshevistskaya Str. 68 Saransk Russia ITMO University Kroverkskiy pr. 49 St. Petersburg 197101 Russia

An explicitly solvable model for tunnelling of relativistic spinless particles through a sphere is suggested. The model operator is constructed by an operator extensions theory method from the orthogonal sum of the Dirac operators on a semi- axis and on the sphere. The transmission coefficient is obtained. The dependence of the transmission coefficient on the particle energy has a resonant character. One observes pairs of the Breit-Wigner and the Fano resonances. It correlates with the corresponding results for a non-relativistic particle.

关键词： Dirac operator nanostructure tunnelling solvable model

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Localised solid-state nanopore fabrication via controlled breakdown using on-chip electrodes

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Nano Research 2022年第11期15卷 9881-9889页

作者： Jasper P.Fried Jacob L.Swett Binoy Paulose Nadappuram Aleksandra Fedosyuk Alex Gee Ondrej E.Dyck James R.Yates Aleksandar P.ivanov Joshua B.Edel Jan A.Mol Department of Materials University of OxfordOxfordOX13PHUK School of Chemistry University of New South WalesSydneyNew South Wales 2052Australia Department of Chemistry Imperial College LondonLondonW120BZUK Center for Nanophase Materials Sciences Oak Ridge National LaboratoryOak RidgeTN 37830USA Instituto de Tecnologia Química e Biológica António Xavier Universidade Nova de LisboaAv.da RepúblicaOeiras 2780-157Portugal School of Physics and Astronomy Queen Mary University of LondonLondonE14NSUK

Controlled breakdown has recently emerged as a highly accessible technique to fabricate solid-state ***,in its most common form,controlled breakdown creates a single nanopore at an arbitrary location in the ***,we introduce a new strategy whereby breakdown is performed by applying the electric field between an on-chip electrode and an electrolyte solution in contact with the opposite side of the *** demonstrate two advantages of this ***,we can independently fabricate multiple nanopores at given positions in the membrane by localising the applied field to the ***,we can create nanopores that are self-aligned with complementary nanoelectrodes by applying voltages to the on-chip electrodes to locally heat the membrane during controlled *** new controlled breakdown method provides a path towards the affordable,rapid,and automatable fabrication of arrays of nanopores self-aligned with complementary on-chip nanostructures.

关键词： solid-state nanopores dielectric breakdown nanofabrication single-molecule sensing nanopore arrays

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Research on Data Integration Technology of the WSN

Research on Data Integration Technology of the WSN

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作者： ivanov Valerii 哈尔滨工程大学

学位级别：硕士

WSN has a very important role in our lives and the impact this will only increase. WSN is also a rapidly growing industry. On the other hand growing market for mobile devices, particularly mobile phones. Also at the moment at least, and perhaps much more rapidly growing industry are the social network, such as last year, according to some reports, the market for social networking sites increased by 250%. In this thesis it was suggested how to improve the existing WSN using the facts of the spread of mobile devices and increase the number of users who have access to social networks from your mobile device. It was decided retrofitted mobile device to any sensor, such as humidity, pressure, etc. At the moment WSN has many problems, because WSN used insecure media to send data. So we need to do something to change this fact. Of course, for testing should be conducted wide research, but we are not sure that at the moment society is ready for this phenomenon at the moment. We think that in the near future we will see a set of networks using the same or modified technology. Social networks-one of the fastest growing industries today, so sooner or later it will happen, so it is better to start thinking about this today.

关键词： WSN mobile devices social networking sites insecure media

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Variations in defect substructure and fracture surface of commercially pure aluminum under creep in weak magnetic field

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Chinese Physics B 2017年第12期26卷 427-431页

作者： Sergey Konovalov Dmitry Zagulyaev 陈希章 Victor Gromov Yurii ivanov Samara National Research University Samara 443086 Russia Wenzhou University Wenzhou 325035 China Siberian State Industrial University Novokuznetsk 654007 Russia Institute of High Current Electronics of the Siberian Branch of the Russia Academy of Sciences Tomsk 634055 Russia

Commercially pure polycrystalline aluminum of grade A85, as a test material, is investigated. Using scanning and transmission electron microscopy the aluminum fine structure and fracture surface are analyzed. Fractures are studied in the regime of creep with and without a simultaneous effect of 0.3-T magnetic field. It is found that the application of a magnetic field in a linear stage of creep leads to substructure imperfection increasing. Furthermore, the magnetic field effect on aluminum in the process of creep causes the average scalar density of dislocations to increase and induces the process of dislocation loop formation to strengthen. Fractographic investigation of the fracture surface shows that in the fibrous fracture zone the average size of plastic fracture pits decreases more than twice under creep in the condition of external magnetic field compared with in the conventional experimental condition. In a shear zone, the magnetic field causes the average size of fracture pits to decrease. Experimental data obtained in the research allow us to conclude that the magnetic field effect on aluminum in the process of creep leads to the fracture toughness value of the material decreasing, which will affect the state of defect substructure of the volume and surface layer of the material. The influence of the magnetic field is analyzed on the basis of the magneto-plasticity effect.

关键词： aluminum magnetic field creep structure

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Casting of microstructured shark skin surfaces and possible applications on aluminum casting parts

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China Foundry 2011年第1期8卷 62-65页

作者： Todor ivanov Andreas Bührig-Polaczek Uwe Vroomen Foundry Institute of RWTH Aachen University

Within the project "Functional Surfaces via Micro-and Nanoscaled Structures" which is part of the Cluster of Excellence "Integrative Production Technology" established and financed by the German Research Foundation (DFG),an investment casting process to produce 3-dimensional functional surfaces down to a structural size of 1μm on near-net-shape-casting parts has been *** common way to realize functional microstructures on metallic surfaces is to use laser ablation,electro discharge machining or micro *** handicap of these processes is their limited *** approach of this project to raise the efficiency is to use the investment casting process to replicate microstructured surfaces by moulding from a laser-microstructured grand master *** main research objective deals with the investigation of the single process steps of the investment casting process with regard to the moulding *** results concerning making of the wax pattern,suitability of ceramic mould and core materials for casting of an AlSi7Mg0.3 alloy as well as the knock-out behavior of the shells are *** using of the example of an intake manifold of a gasoline race car engine,a technical shark skin surface has been realized to reduce the drag of the intake *** intake manifold consists of an air-restrictor with a defined inner diameter which is microstructured with technical shark skin *** this reason the inner diameter cannot be drilled after casting and demands a very high accuracy of the casting part.A technology for the fabrication and demoulding of accurate microstructured castings are *** factors of different moulding steps of the macroscopic casting part as well as the microscopic riblet structure have been examined as well.

关键词： investment casting microstructured surfaces shark skin

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N1s Electron Binding Energies of CN_x Thin Films Grown by Magnetron Sputtering at Different Temperature

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Journal of Materials Science & Technology 1998年第1期14卷 25-28页

作者： Zheng, WT Xing, KZ Hellgren, N ivanov, I Salaneck, WS Sundgren, JE Linkoping Univ Dept Phys S-58183 Linkoping Sweden

Carbon nitride thin films deposited using dc unbalanced magnetron sputtering system have been analyzed by X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy. The XPS data show that N1s binding states depend on substrate temperature T-s, in which the peak at 400.0 eV increases with T-s, whereas the peak at 398.3 eV decreases with T-s slightly. On the basis of XPS, FTIR and Raman spectra, the assignment of N1s electron binding energies was made. The peak at 400.0 eV is attributed to N atoms bonded to sp(2) coordinated C atoms. The peak at 398.3 eV is attributed to N atoms bonded to sp(3) coordinated C atoms as well as N-C bonds.

关键词： Thin films

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Argo floats revealing bimodality of large-scale mid-depth circulation in the North Atlantic

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Acta Oceanologica Sinica 2008年第2期27卷 1-10页

作者： CHU Peter C ivanov Leonid M MELNICHENKO Oleg V LI Rongfeng Department of Oceanography Naval Postgraduate School Monterey California USA International Pacific Research Center University of Hawaii at Manoa Hawaii USA Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China

Analysis of Argo float trajectories at 1 000 m and temperature at 950 m in the North Atlantic between November 2003 and January 2005 demonstrates the existence of two different circulation modes with fast transition between them. Each mode has a pair of cyclonic - anticyclonic gyres. The difference is the location of the cyclonic gyre. The cyclonic gyre stretches from southeast to northwest in the first mode and from the southwest to the northeast in the second mode. The observed modes strongly affect the heat and salt transport in the North Atlantic. In particular, the second mode slows down the westward transport of the warm and saline water from the Mediterranean Sea.

关键词： Argo trajectory data Atlantic Ocean biomodality mid-depth circulation optimal spectral decomposition

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Identification and characterization of single crystal Bi_(2)Te_(3-x)Se_(x) alloy

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Transactions of Nonferrous Metals Society of China 2015年第10期25卷 3279-3285页

作者： Emina POZEGA Svetlana ivanov Zoran STEVIC Ljiljana KARANOVIC Rudolf TOMANEC Lidija GOMIDZELOVIC Ana KOSTOV Mining and Metallurgy Institute Bor Technical Faculty Bor University of Belgrade Faculty of Mining and Geology University of Belgrade

The results of experimental investigation of n-type semiconductor based on Bi2Te3 alloy were presented. This material is used in manufacture of thermoelectric coolers and electrical power generation devices. BizTe2.88Se0.12 solid solution single crystal has been grown using the Czochralski method. Monitoring of structure changes of the sample was carried out by electron microscope. The elemental composition of the studied alloy was obtained by energy dispersive spectrometry （EDS） analysis and empirical formula of the compound was established. X-ray diffraction analysis confirmed that the Bi2Te2.88Se0.12 sample was a single phase with rhombohedral structure. The behavior upon heating was studied using differential thermal analysis （DTA） technique. Changes in physical and chemical properties of materials were measured as a function of increasing temperature by thermogravimetric analysis （TGA）. The lattice parameters values obtained by X-ray powder diffraction analyses of Bi2Te2.88Se0.12 are very similar to BizTe3 lattice constants, indicating that a small portion of tellurium is replaced with selenium. The obtained values for specific electrical and thermal conductivities are in correlation with available literature data. The Vickers microhardness values are in range between HV 187 and HV 39.02 and decrease with load increasing. It is shown that very complex process of infrared thermography can be applied for characterization of thermoelectric elements and modules.

关键词： Bi_(2)Te_(3) Bi_(2)Te_(3-x)Se_(x) single crystal semiconductor thermoelectrical properties hardness thermovision imaging

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ANALYSIS OF SINGLE CRYSTAL STRUCTURE DISTORTIONS USING THE METHOD OF A WIDE BROADENING BEAM(WBB)OF X-RAYS

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电子显微学报 1991年第2期 169-170页

作者： S.A.ivanov Leningrad State Technical University

A diagram of shaping the diffraction pattern of single crystalsusing a wide broadening beam X-rays has been *** following results have been obtained on the basis of thediagram analysis:1. Specific reflectivity Q per u... 详细信息

关键词： line ANALYSIS OF SINGLE CRYSTAL STRUCTURE DISTORTIONS USING THE METHOD OF A WIDE BROADENING BEAM WBB)OF X-RAYS

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