检索结果-南通市图书馆

Influence Researches of Fused Calcium Hexaluminate Amount on Metal Corrosion Resistance of Alumina Refractories

在线全文

学校读者我要写书评

暂无评论

China's Refractories 2016年第1期25卷 1-6页

作者： vladimir v. PRIMACHENKO v.leriy v. MARTYNENKO Irina G. SHULIK Lyudmila N. ZOLOTUKHINA Andrey B. KOv.LYOv PJSC "The Ukrainian Research Institute of Refractories named after A.S. Berezhnoy" Kharkiv.61024 Ukraine

Calcium hexaluminate is one from such perspectiv. materials. It is characterized by high refractoriness （ abov. 1 830 ~C ） , as well as properties stability in reducing atmosphere, high alkali- and slag-resistance, low thermal conductiv.ty and wettability by molten metals. In this work influence researches of fused calcium hexaluminate material additiv. in amount of 5%, 15% amt 25% on the main properties of alumina refractories were carried out. It is established that, the refractories containing the additiv. of 25% calcium hexaluminate material are characterized by the highest properties, slightly impregnated with metal melt and the highest metal corrosion resistance. The alumina purging plugs fi）r blowing of metal with calcium hexaluminate material additiv. are produced and intended to one metallurgical plant of Ukraine for carrying out tests.

关键词： calcium hexaluminate alumina refracto-ries metal resistance purging plugs

On the Alternativ. Approach to Activ. Control

在线全文

学校读者我要写书评

暂无评论

Journal of Applied Mathematics and Physics 2018年第11期6卷 2303-2312页

作者： vladimir v. Arabadzhi Div.sion of Geophysical Research Institute of Applied Physics (RAS) Nizhny Novgorod Russia

Paper is dev.ted to problem of acoustical v.sibility reduction and giv.s brief description of alternativ. approach to activ. control. This approach allows satisfy jointly the four conditions: a) effectiv. suppression of acoustical radiation and scattering caused by elastic body immersed in compressible medium (water);b) cloacking at any important temporal frequencies of ob-serv.nt sound wav.s;c) cloacking at any important spatial frequencies or at any observ.tion directions;(d) thickness of the masking shell is much smaller than the length of suppressed wav.s. Technological dev.lopment giv.s more and more fast and miniature control elements and fast, accurate calculations. On the other hand, the lengths of wav.s to be damped are con-stant due to the constant conditions of their far propagation. The approach suggested uses operations of high space-time resolution for long wav.s controlling. Because the joint fulfillment of the conditions of acoustic support absence and the thinness of the shell and also the causality of control lead to the need to operate at frequencies of much higher than frequencies of wav.s to be damped. It is assumed that the incident wav.s are represented by a discrete set of plane wav.s of finite duration. Also it is assumed only that the characteristic spatial scale of the distribution of normal v.locities on the surface of the protected body is limited from below. The boundary v.lue problem with initial conditions is considered.

关键词： Boundary and Initial Conditions Flat Impact Flat Imprint Imprint Relaxa-tion Depth of Imprint Transparent Supportless Unidirectional Sources of Acoustical Wav.lets Leading Edge of Incident Wav. Leading Pair of Micro-phones

Nonlocal Models of Cosmic Ray Transport in the Galaxy

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 2015年第2期3卷 187-200页

作者： vladimir v. Uchaikin Department of Theoretical Physics Ulyanovsk State University Ulyanovsk Russia

Studying the cosmic ray transport in the Galaxy, we deal with two interacting substances: charged particles and interstellar magnetic field. Two coupled local equations describe this complicated system, but elimination of one of them (say, the magnetic field equation) transforms remaining one (the cosmic rays equation) into the nonlocal form. The most popular nonlocal operators in the cosmic ray physics are integro-differential operators of fractional order. This report contains rev.ew of recent works in this direction, including original results of the author. In the last section, some specific problems are discussed: fractional operators with soft truncation of their kernels, nonlocal properties of fractional Laplacian, and a true form of the fractional material deriv.tiv..

关键词： Nonlocal Model Anomalous Diffusion Fractional Deriv.tiv. Fractal Turbulence Plasma Cosmic Rays

One-Dimensional Filamentary Multiparticle Quantum Structures Arising in the Plane Transv.rse to External Homogeneous Magnetic Field

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 Modern Physics 2015年第7期6卷 990-1003页

作者： vladimir v. Lugov.i Phusical-Technical Institute of Uzbek Academy of Science Tashkent Uzbekistan

It is shown that a single-particle wav. function Ψ, obtained (Landau, 1930) as a solution of the Schr?dinger equation (for a charged particle in a homogeneous magnetic field), and an operator relation of?(or equation?) lead to the dynamic description of one-dimensional many-particle quantum filamentary states. Thus, one can ov.rcome the problem, connected with the finding of many-body wav. function as solution of the Schr?dinger equation with a v.ry tangled Hamiltonian for multi-body system. An effect of nonlocality appears. The dependence of the linear density of particles on the magnetic field and on the number of particles in the one- dimension filamentary multiparticle quantum structure is calculated.

关键词： Quantum Mechanics Trajectory of Quantum Ensemble Quantum Turning Points Many-Particle Filamentary States Magnetic Field Effect of Nonlocality Linear Density of Particles

Detecting Threats of Acoustic Information Leakage Through Fiber Optic Communications

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 Information Security 2012年第2期3卷 149-155页

作者： vladimir v. Grishachev Russian State Geological Prospecting Univ.rsity (RSGPU) Moscow Russia

Information leaks through regular fiber optic communications is possible in the form of eav.sdropping on conv.rsations, using standard fiber optic communications as illegal measuring network. The threat of leakage of audio information can create any kind of irregular light emission, as well as regular light beams modulated at acoustic frequencies. For information protection can be used a means of sound insulation, filtration and noising. This paper discusses the technical possibilities of countering threats by monitoring the optical radiation to detect eav.sdropping.

关键词： Fiber Optic Communications Acoustic (Speech) Information Leakage Channel Protection of Acoustic (Speech) Information

Uniqueness Theorem for the Non-Local Ionization Source in Glow Discharge and Hollow Cathode

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 Modern Physics 2012年第10期3卷 1647-1662页

作者： vladimir v. Gorin Kyiv.National Taras Shev.henko Univ.rsity Kiev UkraineMoscow Institute of Physics and Technology Moscow Russia

The paper is dev.ted to the proof of the uniqueness theorem for solution of the equation for the non-local ionization source in a glow discharge and a hollow cathode in general 3D geometry. The theorem is applied to wide class of electric field configurations, and to the walls of discharge v.lume, which hav. a property of incomplete absorption of the electrons. Cathode is regarded as interior singular source, which is placed arbitrarily close to the wall. The existence of solution is considered also. During the proof of the theorem many of useful structure formulae are obtained. Elements of the proof structure, which hav. arisen, are found to hav. physical sense. It makes clear physical construction of non-local electron av.lanche, which builds a source of ionization in glow discharge at low pressures. Last has decisiv. significance to understand the hollow cathode discharge configuration and the hollow cathode effect.

关键词： Integro-Differential Operator The Fredholm 2-nd Kind Equation Existence and Uniqueness Theorem Nil-potency Glow Discharge Hollow Cathode Non-Local Ionization Non-Local Kinetics

Arrestins:structural disorder creates rich functionality

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Protein & Cell 2018年第12期9卷 986-1003页

作者： v.ev.lod v.Gurev.ch Eugenia v.Gurev.ch vladimir N.Uv.rsky Department of Pharmacology Vanderbilt UniversityNashvilleTN 37232USA Department of Molecular Medicine and USF Health Byrd Alzheimer's Research Institute Morsani College of Medicine University of South FloridaTampaFL 33612USA Institute for Biological Instrumentation Russian Academy of SciencesPushchinoMoscow RegionRussia 142290

Arrestins are soluble relativ.ly small 44-46 kDa proteins that specifically bind hundreds of activ. phosphorylated GPCRs and dozens of non-receptor partners. There are binding partners that demonstrate preference for each of the known arrestin conformations: free, receptor-bound, and microtubule-bound. Recent ev.dence suggests that conformational flexibility in ev.ry functional state is the defining characteristic of arrestins. Flexibility, or plasticity, of proteins is often described as structural disorder, in contrast to the fixed conformational order observ.d in high-resolution crystal structures. Howev.r, protein-protein interactions often inv.lv. highly flexible elements that can assume many distinct conformations upon binding to different partners. Existing ev.dence suggests that arrestins are no exception to this rule: their flexibility is necessary for functional v.rsatility. The data on arrestins and many other multi-functional proteins indicate that in many cases, "order" might be artificially imposed by highly non-physiological crystallization conditions and/or crystal packing forces. In contrast, conformational flexibility (and its extreme case, intrinsic disorder) is a more natural state of proteins, representing true biological order that underlies their physiologically relev.nt functions.

关键词： EPR GPCR NMR arrestin crystal structure disorder protein-protein interactions

Sensing Characteristics of Mixed-Potential-Type YSZ-Based NO_x Sensor Using Au-Doped NiO Sensing Electrode

在线全文

学校读者我要写书评

暂无评论

稀有金属材料与工程 2006年第A3期35卷 36-39页

作者： vladimir v.Plashnitsa Taro Ueda Norio Miura Art Science and Technology Center for Cooperative ResearchKyushu UniversityKasuga-ShiFukuoka 816-8580Japan Interdisciplinary Graduate School of Engineering Sciences Kyushu UniversityKasuga-shiFukuoka 816-8580Japan

The nano-structured NiO powder obtained by sol-gel method was doped with 10 wt% gold in order to modify its morphology as well as its electrochemical catalytic *** NO_x sensing characteristics of mixed-potential-type YSZ-based planar sensors attached with each of the nano-NiO and the Au-doped nano-NiO materials as a sensing electrode SE) were examined at temperatures of 700℃～800℃.The Au-doped NiO-SE was found to giv. a large enhancement in the NO_2 sensitiv.ty as well as the NO_2 selectiv.ty at 800℃under wet condition,in comparison with the pure *** reason for the improv.ment in the NO_2 sensitiv.ty was examined based on the data of polarization curv.s,impedance spectra and catalytic activ.ty for the gas-phase NO_2 decomposition.

关键词： NO_x sensor mixed potential NiO nanostructure YSZ Au

Adv.nces in small animal mesentery models for in v.v. flow cytometry,dynamic microscopy,and drug screening

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2007年第2期13卷 192-218页

作者： Ekaterina I Galanzha v.lery v.Tuchin vladimir P Zharov Philips Classic Laser Laboratories University of Arkansas for Medical Sciences (UAMS) Little Rock AR United States Department of Optics and Biomedical Physics Research-Educational Institute of Optics and Biophotonics Saratov State University Saratov Russia Department of Optics and Biomedical Physics Research-Educational Institute of Optics and Biophotonics Saratov State University Saratov Russia Philips Classic Laser Laboratories University of Arkansas for Medical Sciences (UAMS) Little Rock AR United States

Using animal mesentery with intrav.tal optical microscopy is a well-established experimental model for studying blood and lymph microcirculation in v.v.. Recent adv.nces in cell biology and optical techniques prov.de the basis for extending this model for new applications, which should generate significantly improv.d experimental data. This rev.ew summarizes the achiev.ments in this specific area, including in v.v. label-free blood and lymph photothermal flow cytometry, super-sensitiv. fluorescence image cytometry, light scattering and speckle flow cytometry, microv.ssel dynamic microscopy, infrared (IR) angiography, and high-speed imaging of indiv.dual cells in fast flow. The capabilities of these techniques, using the rat mesentery model, were demonstrated in v.rious studies; e.g., real-time quantitativ. detection of circulating and migrating indiv.dual blood and cancer cells, studies on v.scular dynamics with a focus on lymphatics under normal conditions and under different interv.ntions (e.g. lasers, drugs, nicotine), assessment of lymphatic disturbances from experimental lymphedema, monitoring cell traffic between blood and lymph systems, and high-speed imaging of cell transient deformability in flow. In particular, the obtained results demonstrated that indiv.dual cell transportation in liv.ng organisms depends on cell type (e.g., normal blood or leukemic cells), the cell’s functional state (e.g., liv., apoptotic, or necrotic), and the functional status of the organism. Possible future applications, including in v.v. early diagnosis and prev.ntion of disease, monitoring immune response and apoptosis, chemo- and radio-sensitiv.ty tests, and drug screening, are also discussed.

关键词： Lymph microcirculation Transmission digital microscopy Rat mesentery Flow cytometry Photothermal technique