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Fabrication of Silicon Quantum Wires by Conventional Silicon Processing

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High Technology Letters 1995年第1期1卷 25-27页

作者： Yi, Sh. Jianlin, L. Feng, W. Rong, zh. Ping, H. Shulin, G. Shunming, zh. Baohua, m. Youdou, zh. Nanjing Univ Nanjing China

Ultra fine silicon quantum wires with the Si/SiO2 heterointerface have been fabricated successfully by using reactive ion etching, anisotropic wet chemical etching and subsequent thermal oxidation. The cross-sectional image of scanning electron microscope shows the silicon quantum wires of high quality with the linewidth down to 20nm. The present method has many remarkable advantages, which is important to the study of low-dimension quantum physics and devices.

关键词： Quantum wire Silicon Silicon dioxide Silicon technique

Designing a practical ATm Campus Network

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High Technology Letters 1995年第1期1卷 61-65页

作者： Bin, L. Yong, zh. Shiduan, Ch. Yan, m. Beijing Univ of Posts and Telecommunications Beijing China

A typical distributed ATm campus network——BUPT(Beijing University of Posts andTelecommunications)ATm Campus Network is presented in this *** network iscomposed of several small ATm switches in a distributed manner and will be connected tothe China Education and Research Network(CERNET).First,an architecture of BUPTATm Campus Network is *** the interworking and protocol conversion be-tween ATm network and existing 802.X LAN are ***,some of the typicalbroadband applications such as multimedia communications,virtual workgroups,remotevideo-teaching and LAN emulation are described.

关键词： ATm Campus network LAN CERNET Broadband services

metrology for sub-Rayleigh-length target positioning in~10^(22)W/cm^(2)laser-plasma experiments

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High Power Laser Science and Engineering 2024年第3期12卷 90-105页

作者： E.A.Vishnyakov A.Sagisaka K.Ogura T.zh.Esirkepov B.Gonzalez-Izquierdo C.D.Armstrong T.A.Pikuz S.A.Pikuz W.Yan T.m.Jeong S.Singh P.Hadjisolomou O.Finke G.m.Grittani m.Nevrkla C.m.Lazzarini A.Velyhan T.Hayakawa Y.Fukuda J.K.Koga m.Ishino K.Kondo Y.miyasaka A.Kon m.Nishikino Y.V.Nosach D.Khikhlukha I.P.Tsygvintsev D.Kumar J.Nejdl D.margarone P.V.Sasorov S.Weber m.Kando H.Kiriyama Y.Kato G.Korn K.Kondo S.V.Bulanov T.Kawachi A.S.Pirozh.ov ELI Beamlines Facility The Extreme Light Infrastructure ERICDolníBrežanyCzech Republic Kansai Institute for Photon Science(KPSI) QSTKyotoJapan Central Laser Facility Rutherford Appleton LaboratorySTFCHarwell OxfordDidcotUK Institute for Open and Transdisciplinary Research Initiatives Osaka UniversityOsakaJapan HB11 Energy Holdings FreshwaterAustralia Key Laboratory for Laser Plasmas(ministry of Education) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghaiChina Collaborative Innovation Center of IFSA Shanghai Jiao Tong UniversityShanghaiChina Institute of Plasma Physics ASCR PragueCzech Republic FZU-Institute of Physics ASCR PragueCzech Republic Czech Technical University in Prague FNSPEPragueCzech Republic Institute of Laser Engineering Osaka UniversityOsakaJapan Institute of Physics National Academy of Sciences of UkraineKyivUkraine ISTEQ AR YerevanArmenia

Tight focusing with very small f-numbers is necessary to achieve the highest at-focus ***,tight focusing imposes strong demands on precise target positioning in-focus to achieve the highest on-target irradiance We describe several near-infrared,visible,ultraviolet and soft and hard X-ray diagnostics employed in a~10^(22)W/cm^(2)laser±plasma *** used nearly 10 J total energy femtosecond laser pulses focused into an approximately1.3-μm focal spot on 5±20μm thick stainless-steel *** discuss the applicability of these diagnostics to determine the best in-focus target position with approximately 5μm accuracy(i.e.,around half of the short Rayleigh length)and show that several diagnostics(in particular,3ωreflection and on-axis hard X-rays)can ensure this *** demonstrated target positioning within several micrometers from the focus,ensuring over 80%of the ideal peak laser intensity *** approach is relatively fast(it requires 10±20 laser shots)and does not rely on the coincidence of low-power and high-power focal planes.

关键词： laser-plasma interaction precise target positioning spectroscopy ultra-high intensity X-rays

master equation,design equations and runaway speed of the Kaplan turbine

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Journal of Hydrodynamics 2021年第2期33卷 282-300页

作者： zh.zh.ng zh.W Zurch University of Applied ScienceZurichSwitzerland

To make the Kaplan turbine technology comparable to both the Pelton and the Francis turbine,the master equation for the Kaplan turbine has been established by analyses similar to that-for the Francis *** analysis begins with the descriptions of free vortex flows at the runner inlet and the swirl flow at the impeller *** considering the Euler equation for specific work and by further evaluating the most significant shock and swirling losses,the first and the second energy equations in the form of hydraulic efficiency were *** master equation is then established by combining both energy *** addition,three design equations and a new design parameter are *** master equation relates the turbine hydromechanics to the geometrical design of both the runner and the guide-vane *** enables the complete hydraulic characteristics of a given Kaplan turbine to be analytically and simply computed.A computation example demonstrates the functionality and applicability of the *** the reconstructed master equation,the runaway speed of the Kaplan turbine and its dependence on the guide-vane setting can be easily and precisely *** bulb turbines with guide vanes directly ahead of the turbine runner in the same tube,all computations are also applicable using another equivalent control parameter.

关键词： Kaplan turbine master equation design equations design parameter runaway speed hydraulic efficiency shock loss swirling loss bulb turbines

A FINITE-ELEmENT ANALYSIS OF ELECTROmAGNETIC SHEET mETAL-EXPANSION PROCESS

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中国有色金属学会会刊：英文版 1998年第3期8卷 135-140页

作者： Huang, SY Chang, zh.Wang, ZR Wang, LF Yang, m Wuhan Automot Polytech Univ Sch Mat Engn Wuhan 430070 Peoples R China Harbin Inst Technol Sch Mat Sci & Engn Harbin 150006 Peoples R China

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１ＩＮＴＲＯＤＵＣＴＩＯＮＥｌｅｃｔｒｏｍａｇｎｅｔｉｃｆｏｒｍｉｎｇ，ｅｓｅｎｔｉａｌｙｂｅｉｎｇａｋｉｎｄｏｆａｐｐｌｉｃａｔｉｏｎｏｆｉｍｐｕｌｓｅｉｎｔｅｎｓｉｖｅｃｕｒｅｎｔｔｅｃｈｎｉｑｕｅｉｎｍｅｔａｌｗｏｒｋｉｎｇ，ｄｅａｌｓｗｉｔｈ...

关键词： finite element analysis electromagnetic forming magnetic pressure

Investigation of the Surface Properties of Vinyl Ethers – Sodium 2-Acrylamido-2-methylpropanesulfonate Copolymers

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Advances in materials Physics and Chemistry 2012年第4期2卷 177-180页

作者： S. Kh. Khussain E. m. Shaikhutdinov N. zh. Seitkaliyeva A. zh. zh.nisova Department of applied chemistry Kazakh National Technical University named after Kanysh Satpaev Almaty Kazakhstan

The surface properties of water soluble copolymers vinyl ethers of monoethanolamine and ethylene glycol with sodium 2-acrylamido-2-methyl-propanesulfonate were investigated by studying adsorption at the aqueous solution – air interface. It is found that copolymers have considerably higher surface activity in comparison with poly- sodium 2-acrylamido-2-methyl-propanesulfonate.

关键词： Surface Active Copolymers Adsorption Interface Standard Free Energy of Adsorption

Karst and Pseudokarst of the West Kazakhstan (Republic of Kazakhstan)

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International Journal of Geosciences 2014年第2期5卷 131-136页

作者： Kazh.urat m. Akhmedenov Dinmuhammed zh. Iskaliev Vladim P. Petrishev Department of Geography M. Utemissov West Kazakhstan State University Uralsk Kazakhstan Institute of Steppe (Ural Branch of RAS) Orenburg Russian Federation Scientific Research Institute of Biotechnology and Nature management West Kazakhstan Agrarian Technical University Named of Zhangir Khan (WKATU) Uralsk Kazakhstan

An analysis of the formation of karst and karst-suffosion forms on the territory of the West Kazakhstan region is presented in this paper. Numerous literary sources were used as the information database for the analysis of the relief features of the West Kazakhstan region. Evaluation of the morphometric features of the collapsed new formations on the basis of materials of our own field research is presented here for the first time. According to the research objectives there were defined localization places of the karst-collapsed phenomena where the reconnaissance field surveys were carried out. Survey points’ localization has been carried out by means of GPS system with the help of 12-channel GPS-receiver of Garmin eTrex model. Geoinformational technology, based on mapInfo 9.5 and ArcGIS 9.2 packages was used for the building of the information and cartographic database. Original thematic maps compiled on the basis of the research results’ analysis have been obtained in this research. The features of the Caspian Basin’s karst landscapes, formed as a result of salt-dome tectonic manifestations (Inder mountains, malaya Bogdo mountain, Bish-Chokho hill) are described in this paper. The important elements of the Caspian Basin salt-dome landscapes are landforms of the karst origin from large karst depressions of the karst-tectonic origin to modern forms of the sulfate karst: sinkholes, wells, polje, knobs (“Kurgantau”), arches, caves and grottoes. Some karst formations have a non-salt-dome origin. Three areas with the collapsed forms that have the karst-suffosion origin have been identified (near Konyr village, Berezovka village and zh.natalap village). The mechanism of the sinkholes formation is due to the changes of the groundwater regime and the displacement of limestone eluvium as a result of active anthropogenic impacts. The sinkholes occurence near zh.natalap village, which is located near the Karachaganak oil and gas field, is probably due to the anthropogenic ini

关键词： Geography Geomorphology Relief Karst Pseudokarst Collapses Suffusion Denudation-Karst Karst-Collapsing Funnel Ponor Well Trough Keprok Inder Kazakhstan

Regime dynamics of hydrochemical and toxicological parameters of the Irtysh River in Kazakhstan

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Journal of Arid Land 2016年第4期8卷 521-532页

作者： Diana m BURLIBAYEVA malik zh.BURLIBAYEV Christian OPP BAO Anming Department of Water Resources and Land Reclamation Kazakh National Agrarian UniversityAlmaty 050010Kazakhstan Kazakhstan Agency of Applied Ecology Almaty 050012Kazakhstan Department Hydrology&Soil Science Faculty of GeographyPhilipps UniversityMarburg 35032Germany Xinjiang Institute of Ecology and Geography Chinese Academy of SciencesUrumqi 830011China

Since the Irtysh River flows through the important economic, ecological and social territories of China, Kazakhstan and Russia, the water quality issues growingly draw the attention of the water authorities from these countries. Therefore, a detailed study of the hydrochemical regime and toxicological indicators in Kazakhstan was carried out for understanding the regime dynamics of water quality and its affect factors. The combined assessment of maximum permissible concentration （mPC） of chemical components and biotesting method were proposed and performed for the study area. The results clearly showed that the concentrations of single chemical component at different locations are mostly under mPC standard in a basin scale. However, the watershed surface runoff and tributary stream flow from mining industry areas had high concentration of heavy metals and had significant impact on the water quality near Ust-Kamenogorsk. Furthermore, even the stream water generally meet mPC standard, the results of biotesting method show the toxicity level of water sample is lethal for the test objects of phytoplankton and Daphnia. The survival rates of most water samples are lower than 46.7%. Hereby, this study strongly suggests using combined water assessment methods to evaluate the water quality.

关键词： hydrochemistry biotesting method Irtysh River Kazakhstan

Solid liquid mixed Casting of Al-Si Alloy

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Journal of Central South University 2000年第3期12卷 133-135页

作者： Chen, zh.Kang, ZT Cent S Univ Technol Dept Mat Sci & Engn Changsha 410083 Peoples R China

The paper presents a novel material preparation technology—Solid liquid mixed casting technology. In the technology, large amounts of homogeneous alloy powder or heterogenous powder with perfect wettability are added into the superheated melt. After strong agitation, the mixed melt can be cast or hot processed. Applying solid liquid mixed casting, three kinds of Al Si alloys were investigated. The results show that, when the mass of powder accession to alloy melt is about 1, the mean size of primary Si in hyper eutectic alloy can be controlled at less than 5 μm; and the mean grain size of α phase in hypo eutectic alloy is less than 10 μm. This technology has the advantage of preparing material with very fine microstructure by fairly simple casting process, and may be a new practicable and valuable metal preparation technology.

关键词： solid liquid mixed casting powder melt Document code:A