检索结果-南通市图书馆

Some Aspects of Ray Representation Running Sound Waves in Liquid Spaces

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Acoustics 2013年第1期3卷 7-13页

作者： v. P. ivanov G. k. ivanova Institute of Applied Physics Russian Academy of Sciences Nizhny Novgorod Russia

Work is devoted to the analysis of errors meeting in literature in treatment of a spatial part of a phase of running sound waves. In some cases, it is not taken into consideration that this part of a phase is formed by scalar product of vectors which does not depend on a choice of system of co-ordinates. Taking into account the necessary corrections in record of a phase of plane waves, it is shown that the decision of the homogeneous wave equation in the form of “belated” potentials is simultaneously and the decision of the equations of movement of a liquid, and “outstripped” potentials does not satisfy them. The analysis of coefficients of reflection and passage of running waves in non-uniform space is carried out. It is shown that on boundary of spaces with different sound speeds, a turning point of a sound wave is the point of full internal reflection. The way of calculation of coefficients of reflection and passage is offered by consideration of all three waves on boundary of spaces as vectors with the set directions and amplitude of a falling wave. Calculation of coefficients of reflection and passage of a sound wave in a wave-guide of canonical type along the chosen trajectory by two methods—under traditional formulas and a vector method is carried out. Results of calculation practically coincide.

关键词： Sound Running Waves Wave Equation Reflection Passage Liquid Space Wave-Guide Rays

Expanded Porphyrin Exhibiting Off-Centered Out-of-Plane Coordination to Dysprosium

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CCS Chemistry 2024年第7期6卷 1731-1738页

作者： Dmitry I.Nazarov Jorge Labella Alexey v.kuzmin Maxim A.Faraonov Evgenii N.ivanov Salavat S.khasanov Tomas Torres Mikhail k.Islyaikin Dmitri v.konarev Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry RAS 142432 Chernogolovka Department of Organic Chemistry Universidad Autonoma de Madrid28049 Madrid Institute of Solid-State Physics RAS 142432 Chernogolovka Research Institute of Macroheterocycles Ivanovo State University of Chemistry and Technology15300 Ivanovo G.A.krestov Institute of Solution Chemistry of the Russian Academy of Sciences 153045 Ivanovo Institute for Advanced Research in Chemical Sciences Universidad Autonoma de Madrid28049 Madrid IMDEA-Nanociencia 28049 Madrid

The complexation of high-spin lanthanides to porphyrinoids is a powerful strategy for the development of advanced molecular *** this context,the use of expanded porphyrinoids remains elusive since their coordination chemistry is challenging to ***,taking inspiration from on-surface chemistry,we explored the coordination of Dy^(3+)to a six-membered porphyrinoid,namely,the hemihexaphyrazine ***,we observed the selective formation of a mono-nuclear off-centered,out-of-plane H_(2)Hhp-Dy^(3+)complex when performing the complexation under reductive *** this reaction,the oxidation state of the macrocycle did not *** X-ray diffraction analysis,we found that the coordination number of Dy in this complex was *** macrocycle cocrystallized with decamethylcobaltocene(Cp_(2)^(*)Co)molecules,giving rise to a wellordered solid-state packing,governed byπ-π*** a result of this organization,a small magnetic coupling between the neighboring molecules was *** in all,this work provides key insights into the coordination of magnetically active metals with expanded porphyrinoids,thus motivating the development of advanced spintronic devices.

关键词： porphyrins dysprosium macrocycle coordination chemistry magnetism

Development and testing of a high-power S-band klystron at BINP SB RAS

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2024年第7期35卷 58-67页

作者： A.Levichev A.Barnyakov S.Samoylov D.Nikiforov v.ivanov M.Arsentyeva D.Chekmenev O.Pavlov I.Pivovarov Budker Institute of Nuclear Physics Lavrentyeva Av.11NovosibirskRussia630090 Novosibirsk State University Pirogova Str.2NovosibirskRussia630090

This paper details the development and testing of the first working prototype of the S-band high-power klystron,accomplished at the Budker Institute of Nuclear Physics,Siberian Branch,Russian Academy of Sciences(BINP SB RAS).Upon testing,the klystron demonstrated the following parameters:an operating frequency of 2856 MHz and a peak power output of 50 *** paper presents the klystron's design,its constituent units,and pertinent processing procedures,along with discussions on the measurement of its parameters.

关键词： klystron Linear accelerator Electron beam

Generation of strong magnetic fields for magnetized plasma experiments at the 1-MA pulsed power machine

在线全文

学校读者我要写书评

暂无评论

Matter and Radiation at Extremes 2021年第4期6卷 31-42页

作者： v.v.ivanov A.v.Maximov R.Betti L.S.Leal J.D.Moody k.J.Swanson N.A.Huerta Department of Physics University of NevadaRenoNevada 89557USA Laboratory for Laser Energetics University of RochesterRochesterNew York 14623USA Department of Physics and Astronomy University of RochesterRochesterNew York 14623USA Lawrence Livermore National Laboratory LivermoreCalifornia 94550USA

Pulsed power technology provides a platform for investigating plasmas in strong magnetic fields using a university-scale *** here are methods for generating and measuring the 1–4-MG magnetic fields developed for the 1-MA Zebra pulsed power generator at the University of Nevada,Reno.A laser coupled with the Zebra generator produces a magnetized plasma,and experiments investigate how a megagauss magnetic field affects the two-plasmon decay and the expansion of the laser-produced plasma in both transverse and longitudinal magnetic fields.

关键词： magnetic generator fields

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

在线全文

学校读者我要写书评

暂无评论

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

RATIONAL FUNCTIONS OF BEST UNIFORM APPROXIMATION AND HOLOMORPHIC CONTINUATION OF FUNCTIONS

在线全文

学校读者我要写书评

暂无评论

Analysis in Theory and Applications 1996年第1期12卷 1-9页

作者： I.v.ivanov R.k.kovacheva J.Gilewicz Balgarian Academy of Sciences Institute of Math NRS Luming FranceBalgarian Academy of Sciences Institute of MathNRS Luming FranceBalgarian Academy of Sciences Institute of MathNRS Luming France

Let f be a function, continuous and real valued on the segment △,△ (-∞,∞) and {Rn} be the sequence of the rational functions of best uniform approximation to fon △ of order (n,n). In the present work, the convergence of {Rn} in the complex plane is considered for the special caseswhen the poles (or the zeros, respectively) of {Rn} accumulate in the terms of weak convergence of measures to acompact set of zera *** a consequence, sufficient conditions for the holomorphic and the meromorphic continuability of fare given.

关键词： RATIONAL FUNCTIONS OF BEST UNIFORM APPROXIMATION AND HOLOMORPHIC CONTINUATION OF FUNCTIONS

STUDY OF SOLID-PLASMA CONTROL COMPONENTS FOR MILLIMETER FREQUENCIES

在线全文

学校读者我要写书评

暂无评论

STUDY OF SOLID-PLASMA CONTROL COMPONENTS FOR MILLIMETER FREQ...

Modification of titanium surface via Ag-,Sr-and Si-containing micro-arc calcium phosphate coating

International Conference on Millimeter Wave and far-Infrared Technology

作者： v.I.Miteva k.P.ivanov Institute of Electronics Bulgarian Academy of Sciences Boul. Lenin 72 Sofia-1784 Bulgaria Institute of Electronics Bulgarian Academy of Sciences Boul. Lenin 72 Sofia-1784 Bulgaria

＜正＞ The nonreciprocal properties of a circular guide with azimuthally magnetized semiconductor operating in the TM01 propagation mode are studies, showing some promise in constructing solid-plasma phasers, cutoff s...

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Bioactive Materials 2019年第1期4卷 224-235页

作者： Mariya B.Sedelnikova Ekaterina G.komarova Yurii P.Sharkeev Anna v.Ugodchikova Tatiana v.Tolkacheva Julietta v.Rau Evgeny E.Buyko vladimir v.ivanov vladimir v.Sheikin Institute of Strength Physics and Materials Science of SB RAS Academicheskii Prospect 2/4Tomsk634055Russia National Research Tomsk Polytechnic University Lenina Prospect 30Tomsk634050Russia Istituto di Struttura della Materia Consiglio Nazionale delle Ricerche(ISM-CNR)Via del Fosso del Cavaliere 10000133 RomaItaly Siberian State Medical University Moscovskii Tract 2Tomsk634050Russia

The current research is devoted to the study of the modification of the titanium implants by the micro-arc oxidation with bioactive calcium phosphate coatings containing Ag or Sr and Si *** coatings’microstructure,phase composition,morphology,physicochemical and biological properties were examined by scanning electron microscopy(SEM),transmission electron microscopy(TEM),energy-dispersive X-ray spectroscopy(EDX)and X-ray diffraction(XRD).Ag-containing and Sr-Si-incorporated coatings were formed in alkaline and acid electrolytes,*** formation of the coatings occurred at different ranges of the applied voltages,which led to the significant difference in the coatings *** trace elements Ag,Sr and Si participated intensively in the plasma-chemical reactions of the micro-arc coatings ***-containing coatings demonstrated strong antibacterial effect against Staphylococcus aureus AТСС*** in vitro test with 3T3-L1 fibroblasts showed no cytotoxicity appearance on Sr-Si-incorporated coatings.

关键词： Trace elements Biocoatings Micro-arc oxidation Titanium substrate Antibacterial activity

Deep Unity of Classic and Quantum Physics at the Space Thermostat Presence with Technical Applications

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Applied Mathematics and Physics 2017年第4期5卷 801-812页

作者： M. Ja. ivanov v. k. Mamaev Guanghua Zheng Gas Turbine Department Central Institute of Aviation Motors Moscow Russia Northwestern Polytechnic University Xian China

The paper demonstrates deep unity of classic and quantum physics at the space thermostat (ST) presence, which fulfilled all space by the temperature T0 = 2.73 k. The ST presents itself the Cosmic Microwave Background (CMB). From the main quantum position we consider the ST/CMB as the wave function carrier (“quantum background”). The paper is devoted to ST/CMB medium the classic conservation laws of mass, momentum and energy. We show the soliton like solutions of our classic model correspond to Schrodinger’s quantum solutions, demonstrate the atom hydrogen specter and other quantum peculiarities. The paper contains typical technical examples classic/ quantum simulation at the ST presence.

关键词： Space Thermostat Conservation Laws Schrodinger’s Solutions Technical Ap-plications