检索结果-南通市图书馆

incubation of PbSe Thin Films in a Tin(Ⅱ) Salt Aqueous Solution:Modification and ion-Exchange Reactions

Journal of Materials Science & Technology 2015年第8期31卷 790-797页

作者： Zinaida i.smirnova Larisa N.Maskaeva Vyacheslav F.Markov Vladimir i.Voronin Mikhail V.Kuznetsov Ural Federal University(named after the First President of Russia B.N.Yeltsin) ul.Mira 19Yekaterinburg620002Russia Ural institute of State Fire Service of EMERCOM of Russia Yekaterinburgul.Mira 22620062Russia institute of Metal Physics Ural BranchRussian Academy of Sciencesul.S.Kovalevskoy 18Yekaterinburg620041Russia institute of Solid State Chemistry Ural BranchRussian Academy of Sciencesul.Pervomaiskaya 91Yekaterinburg620990Russia

Topochemical ion-exchange reactions between solid micro- and nanostructured metal chalcogenides and aqueous salt solutions are generally used for formation of composite structures based on initial metal chalcogenides and products of their ion-exchange transformation. However, ion exchange has promises as a route to obtaining both composites and solid solutions based on the initial and the end chalcogenide phases. With the help of the ion-exchange technique, single-phase films of Phi xSnxSe substitutional solid solutions with a tin content up to -2 at.%, which are promising for mid- and long-wavelength infrared radiation （iR） optoelectronics, have been obtained at the interface between PbSe poly- crystalline thin films and SnCl2 aqueous solutions containing sodium citrate. it has been shown that the pH value and temperature of the reaction system play an important role in the ion-exchange process. incubation of lead selenide （PbSe） films in a tin（ii） salt aqueous solution also leads to their modification with oxygen-containing tin compounds to a depth of-3 nm. Differences in the film structure, such as changes in the coherent scattering region sizes and orientation of crystallites along the [220] direction, which arise during the contact with citrate-containing SnCl2 solutions, have also been revealed. For the first time, an idea of the existence of a relatively wide reaction zone of an intragranular topochemical ion-exchange reaction in an aqueous solution, within which substitutional solid solutions can form in micro- and nanostructured systems, has been set forth.

关键词： ion-exchange synthesis Thin films Lead selenide Tin selenide Substitutional solid solutions Topochemical reaction

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

中国与俄罗斯食品质量安全标准比较

引用

上海农业学报 2011年第3期27卷 84-88页

作者：李诚郑佳 L.Ostroumov A.Prosekov A.Zheleznov1 i.smirnova L．0stroumov A．Prosekov1 1A．Zheleznov 1i.smirnova 四川农业大学食品学院雅安625000 俄罗斯克麦罗沃州食品工业技术研究所克麦罗沃州650056

分析和比较了中国与俄罗斯两个国家之间的食品质量安全标准体系,以奶酪制造为例,着重找出两者之间的差异和不足,为两国在奶酪制造领域的交流和合作奠定基础。

关键词：食品工业质量安全标准奶酪中国俄罗斯 GOST GB

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

中国与俄罗斯食品质量标准比较(英文)

引用

食品与发酵科技 2010年第3期46卷 10-13,54页

作者：李诚郑佳 L.Ostroumov A.Prosekov A.Zheleznov i.smirnova 四川农业大学食品学院雅安625000 俄罗斯克麦罗沃州食品工业技术研究所克麦罗沃州650056

本文对中国与俄罗斯两个国家之间的食品质量标准体系进行比较和分析。以食品工业中奶酪制造为例,着重找出两者之间的差异和不足,为两国在奶酪制造领域的交流和合作奠定基础。

关键词：中国俄罗斯标准食品奶酪 GOST GB

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

家是梦想的城堡Olesya smirnova白的儿童摄影

引用

人像摄影 2024年第6期 12-25页

作者：奥莱西亚·斯米尔诺娃(摄影) Demi(采访/文) 不详

从建筑师到摄影师奥莱西亚·斯米尔诺娃(Olesya smirnova),今年40岁,俄罗斯著名儿童摄影师。她的作品细腻、真诚、治愈,充满童趣又极具感染力。Olesya居住在俄罗斯的“金环”城市雅罗斯拉夫尔,这是俄罗斯最古老、历史最悠久的城市之一。

关键词：儿童摄影米尔诺俄罗斯摄影师 Sm

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Peculiarities of the electrocaloric effect in relaxors

引用

Journal of Materiomics 2023年第1期9卷 223-228页

作者： Elena smirnova Galina Sotnikova Andrei Sotnikov Alexandr Kapralov Gennadiy Gavrilov ioffe institute 26 PolitekhnicheskayaSt Petersburg194021Russian Federation

A comprehensive study and detailed analysis of pyroelectric and electrocaloric effects in relaxor ferroelectrics based on lead magnesium niobate as a promising object for such investigations have been carried *** was found that even at the maximum values of pyroelectric coefficients the electrocaloric response inextricably linked with the pyroelectric effect does not exceed 1°C in the temperature range from 10 to 60°C under DC electric field up to 60 kV/*** conditions are the most demanded for the operation of electrocaloric cooling *** for the future as to increasing the efficiency of the main elements for such devices is discussed.

关键词： Relaxors Electrocaloric effect Pyroelectric effect

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Extension of Near-Wall Domain Decomposition to Modeling Flows with Laminar-Turbulent Transition

引用

Communications in Computational Physics 2022年第2期31卷 645-668页

作者： M.Petrov S.Utyuzhnikov A.Chikitkin N.smirnova Moscow institute of Physics&Technology Dolgoprudny 141700Russia Department of Mechanical Aerospace&Civil EngineeringThe University of ManchesterManchesterM139PLUK

The near-wall domain decomposition method(NDD)has proved to be very efficient for modeling near-wall fully turbulent *** this paper the NDD is extended to non-equilibrium regimeswith laminar-turbulent transition(LTT)for the first *** LTT is identified with the use of the e^(N)-method which is applied to both incompressible and compressible *** ismodified to take into account LTT in an *** addition,implementation of the intermittency expands the capabilities of NDD to model non-equilibrium turbulent flows with *** of the modified NDD approach is demonstrated on various test problems of subsonic and supersonic flows past a flat plate,a supersonic flow over a compression corner and a planar shock wave impinging on a turbulent boundary *** results of modeling with and without decomposition are compared in terms of wall friction and show good agreement with each other while NDD significantly reducing computational resources *** turns out that the NDD can reduce the computational time as much as three times while retaining practically the same accuracy of prediction.

关键词： Domain decomposition laminar-turbulent transition interface boundary condition near-wall flow low-Reynolds-number model

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

impacts of Down-Up Hill Segment on the Threshold of Shock Formation of Ring Road Vehicular Flow

引用

Advances in Applied Mathematics and Mechanics 2023年第5期15卷 1315-1334页

作者： Zejing Hu M.N.smirnova N.N.Smirnov Yongliang Zhang Zuojin Zhu Faculty of Engineering Science University of Science and Technology of ChinaHefeiAnhui 230026China Faculty of Mechanics and Mathematics Lomonosov Moscow State UniversityMoscow119992Russia Anhui Xiang Shui Jian Pumped Storage Co. LTDWuhuAnhui 241083China

The study of impacts of down-up hill road segment on the density threshold of traffic shock formation in ring road vehicular flow is helpful to the deep understanding of sags’bottleneck *** are freeway segments along which the gradient increases gradually in the traffic *** main aim of this paper is to seek the density threshold of shock formation of vehicular flow in ring road with down-up hill segment,because down-up hill roadway segment is a source to cause capacity reduction that is an attractive topic in vehicular traffic *** seek the density threshold numerically,a viscoelastic continuum model[1]is extended and *** solve the model equations,a fifth-order weighted essentially non-oscillatory scheme for spatial discretization,and a 3rd order Runge-Kutta scheme for time partial derivative term are *** by existing observation data and the Navier-Stokes like model[2]extended as EZM is done before conducting extensive numerical *** ring road vehicular flow with three separated down-up hill segments,it is found that the density threshold of shock formation decreases monotonically with the relative difference of free flow speed,this variation can be simply fitted by a third order polynomial.

关键词： Down-up hill road segment viscoelastic continuum model sags’bottleneck effect density threshold WENO5 scheme

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Novel technique for measurement of coating layer thickness of fine and porous particles using focused ion beam

引用

Particuology 2019年第1期17卷 190-198页

作者： M. Goslinska i. Selmer C. Kleemann U.Kulozik i. smirnova S. Heinrich Hamburg University of Technology Institute of Solids Process Engineering and Particle TechnologyDenickestr1521073 HamburgGermany Hamburg University of Technology Institute of Thermal Separation ProcessesEiJ^endorfer Str. 3821073 HamburgGermany Technical University of Munich Chair of Food and Bioprocess EngineeringWeihenstephaner Berg 185354 FreisingGermany

A novel technique for the measurement of the coating layer thickness of fine particles was developed in this work based on cross-sectioning of micrometre-sized single coated particles using focused ion beam (FiB) milling. This technique was tested on two batches of aerogel particles coated with thin coatings in a spouted bed. The FiB milling procedure consisted of two steps. First, the desired part of the coated particle was removed using a high ion beam current. The resulting cross-sectioned area was then polished using a lower ion beam current to make the cross-section clearly visible. The FiB milling process was controlled with simultaneous scanning electron microscopy (SEM). Afterwards, the coating layer thickness was evaluated using the SEM images. The coating layer was successfully applied on the porous aerogel microparticles in the spouted bed. The coating uniformity of the highly porous particles increased with increasing sprayed coating solution amount, with up to 91% of the particle pores being covered. The FiB-cross-sectioning technique using an ion beam of 2.50 nA for the first milling and 0.43 nA for polishing of the surface resulted in successful generation of cross-sections of representative particles with a visible particle core and coating layer. A coating layer thickness of approximately 700 nm was achieved on particles with sizes of below 45 μm.

关键词： Coating layer thickness Focused ion beam Microparticle Aerogel Spouted bed Dilute spouting

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Travel time prediction with viscoelastic traffic model

引用

Applied Mathematics and Mechanics(English Edition) 2018年第12期39卷 1769-1788页

作者： Yongliang ZHANG M.N.smirnova A.i.BOGDANOVA Zuojin ZHU N.N.SMiRNOV Faculty of Engineering Science University of Science and Technology of China Faculty of Mechanics and Mathematics Moscow M.V.Lomonosov State University Scientific Research institute for System Analysis Russian Academy of Sciences

Travel time through a ring road with a total length of 80 km has been predicted by a viscoelastic traffic model(VEM), which is developed in analogous to the non-Newtonian fluid flow. The VEM expresses a traffic pressure for the unfree flow case by space headway, ensuring that the pressure can be determined by the assumption that the relevant second critical sound speed is exactly equal to the disturbance propagation speed determined by the free flow speed and the braking distance measured by the average vehicular length. The VEM assumes that the sound speed for the free flow case depends on the traffic density in some specific aspects, which ensures that it is exactly identical to the free flow speed on an empty road. To make a comparison, the open Navier-Stokes type model developed by Zhang(ZHANG, H. M. Driver memory, traffic viscosity and a viscous vehicular traffic flow model. Transp. Res. Part B, 37, 27–41(2003)) is adopted to predict the travel time through the ring road for providing the counterpart *** the traffic free flow speed is 80 km/h, the braking distance is supposed to be 45 m,with the jam density uniquely determined by the average length of vehicles l ≈ 5.8 m. To avoid possible singular points in travel time prediction, a distinguishing period for time averaging is pre-assigned to be 7.5 minutes. it is found that the travel time increases monotonically with the initial traffic density on the ring road. Without ramp effects, for the ring road with the initial density less than the second critical density, the travel time can be simply predicted by using the equilibrium speed. However, this simpler approach is unavailable for scenarios over the second critical.

关键词： travel time viscoelastic modeling distinguishing period for time averaging spatial-temporal pattern traffic jam

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

influence of polyolefin fibers on the strength and deformability properties of road pavement concrete

引用

Journal of Traffic and Transportation Engineering(English Edition) 2019年第4期6卷 407-417页

作者： Olga smirnova Alexey Kharitonov Yuriy Belentsov Department of Constructing Mining Enterprises and Underground Structures Saint-Petersburg Mining UniversitySaint Petersburg 199106Russia Department of Technology of Building Materials and Metrology Saint-Petersburg State University of Architecture and Civil EngineeringSaint Petersburg 190005Russia Department of Building Materials and Technologies Emperor Alexander I St.Petersburg State Transport UniversitySaint Petersburg 190031Russia

influence of the type and quantity of polyolefin fibers on the strength properties(compression strength, tensile strength in bending, strength in uniaxial tension), the deformation properties(elastic modulus, Poisson’s coefficient) and the abrasion resistance of cement concrete with water-to-cement ratio within 0.31 e0.55 were stated in the *** ways of fibers introduction into fresh concrete were investigated. it was shown that the fibers introduction method and procedure of mixing are the ways to improve the fibers uniform distribution in fresh concrete. The increase of the bending tensile strength and the uniaxial tensile strength of concrete with fibers reinforcement in comparison with the reference concrete was observed with the water-to-cement ratio decrease. The increase of uniaxial tensile strength at age of 28 days for concrete with macrofibers in amount of4.5 kg/m^3 was 23% and 29%;for macrofibers in quantity of 3 kg/m^3 was 19% and 26% with water-cement ratio equal to 0.49 and 0.31, respectively. The maximum reduction of abrasion in the range of 7.5%e10% was observed in concrete with water-to-cement ratio within0.44 e0.55 for all investigated types of fibers. The influence of fibers on the concrete abrasion with lower W/C ratio was negligible. The results can contribute to the rational use of modified polyolefin fibers in road pavement concrete.

关键词： Road pavement concrete Polyolefin fibers Strength Elastic modulus Abrasion Water-to-cement ratio

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：