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The Self-assembling and Application of Inorganic Anti-bacterial Material Made of Natural Nanoporous Carrier

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Journal of Wuhan university of Technology(Materials Science) 2008年第6期23卷 771-774页

作者：孙春宝 school of Civil and Environmental engineering University of Science and Technology Beijing

The inorganic antimicrobial material was inhibited to the microbes with the added metal ion,*** primary wet product carrying 5%-10% zinc ion was generated under the following conditions：temperature was 95 ℃,solution zinc concentration was 1.2-2.0 mol/L,and the ratio of Zn solution to zeolite weight was 5：*** final stable product was manufactured after baking in an oven for 1-3 h at the temperature of 500-900 ℃.The baked material was tested for its disinfection effectiveness and coloring effect when mixed with paint *** on the final batch of tests,the zinc content of this anti-microbial product was further optimized.

关键词： inorganic antimicrobial nanoporous material antibacterial coating zeolite self-assembling

P2P traffic optimization

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Science china(Information Sciences) 2012年第7期55卷 1475-1492页

作者： ZHANG GuoQiang 1,2 ,TANG MingDong 3 ,CHENG SuQi 2,4 ,ZHANG GuoQing 2 ,SONG HaiBin 5 ,CAO JiGuang 6 & YANG Jing 7 1 school of Computer Science and Technology,Nanjing Normal university,Nanjing 210046,china 2 institute of Computing Technology,Chinese Academy of Sciences,beijing 100190,china 3 school of Computer Science and engineering,Hunan university of Science and Technology,Xiangtan 411201,china 4 Graduate university of Chinese Academy of Sciences,beijing 100190,china 5 Nanjing R&D Center,Huawei Technologies,Nanjing 210012,china 6 china Academy of Telecommunication research of MIIT,beijing 100191,china 7 china Mobile research institute,beijing 100053,china school of Computer Science and Technology Nanjing Normal University Nanjing China institute of Computing Technology Chinese Academy of Sciences Beijing China school of Computer Science and engineering Hunan University of Science and Technology Xiangtan China Graduate university of Chinese Academy of Sciences Beijing China Nanjing R&D Center Huawei Technologies Nanjing China china Academy of Telecommunication research of MIIT Beijing China china Mobile research institute Beijing China

Peer-to-peer (P2P) based content distribution systems have emerged as the main form for content distribution on the Internet,which can greatly reduce the distribution cost of content providers and improve the overall system ***,the mismatch between the overlay and underlay networks causes large volume of redundant traffic,which intensifies the tension between P2P content providers and ***,how to efficiently use network resources to reduce the traffic burden on the ISPs is crucial for the sustainable development of P2P *** paper surveys the state-of-art P2P traffic optimization technologies from three perspectives:P2P cache,locality-awareness and data *** details,comparison between these technologies and their applicabilities are presented,followed by a discussion of the issues that remain to be addressed and the direction of future content distribution research.

关键词： P2P traffic localization P2P traffic optimization P2P cache locality-awareness network coding content-centric network

s-ordering operator expansions of quantum-mechanical fundamental representations and their applications

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Science china(Physics,Mechanics & Astronomy) 2011年第12期54卷 2150-2154页

作者： FAN HongYi 1,3 , XU YeJun 2 & YUAN HongChun 3,4 1 Department of Materials Science and engineering, university of Science and Technology of china, Hefei 230026, china 2 Department of Physics Electronic and engineering, Chizhou university, Chizhou 247000, china 3 Department of Physics, Shanghai Jiao Tong university, Shanghai 200030, china 4 College of Optoelectronic engineering, Changzhou institute of Technology, Changzhou 213002, china Department of Materials Science and engineering University of Science and Technology of China Hefei China Department of Physics Shanghai Jiao Tong University Shanghai China Department of Physics Electronic and engineering Chizhou University Chizhou China College of Optoelectronic engineering Changzhou Institute of Technology Changzhou China

We show that the quantum-mechanical fundamental representations, say, the coordinate representation, the coherent state representation, the Fan-Klauder entangled state representation can be recast into s-ordering operator expansion, which is elegant in form and has many applications in deriving new operator identities. This demonstrates that Dirac's symbolic method can be merged into Newton-Leibniz integration theory in a broad way.

关键词： s-ordering operator expansion operator identities quantum mechanical representation

Formation of Intragranular Ferrite During Isothermal/Thermomechanical Processes in a Medium Carbon V-Ti-N Microalloyed Steel

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Journal of Iron and Steel research International 2011年第S1期18卷 350-354页

作者： XU Lei 1,LIU Guo-quan 2,NIE Yu-zhu 1,WANG Xue-hui 1,MA E 1 (1.hebei Iron and Steel Technology research institute,Shi Jiazhuang 050021,hebei,china 2.school of Materials Science and engineering /State Key Laboratory for Advanced Metals and Materials,university of Science and Technology beijing,beijing 100083,china) hebei Iron & Steel Technol Res Inst Shijiazhuang 050021 Hebei Peoples R China Univ Sci & Technol beijing Sch Mat Sci & Engn State Key Lab Adv Met & Mat Beijing 100083 Peoples R China

For a V-Ti-N microalloyed steel with 0.34%C-1.54%Mn,intragranular ferrite (IGF) was obtained in both isothermal austenite decomposition processes and thermomechanical processes simulating the industrial seamless tubing manufacture *** show that with decrease of the isothermal temperature in range of 600℃ down to 450℃,not only the morphology of IGF changed from equiaxed to acicular,but also the equiaxed IGF and the acicular IGF were *** importantly,it is found that the amount of equiaxed ferrite increased significantly in the thermomechanical process sample water quenched from 550℃ after 800℃ deformation than that in the isothermally treated sample at 550℃ sample without hot *** implies that appropriate controlled deformation with controlled cooling can significantly promote equiaxed IGF formation,and not solely rely on nucleation mechanisms related with *** deformation of austenite without dynamic and complete static recrystallization causes high energy regions,therefore further promotes the nucleation potency of IGF.

关键词： V-Ti-N microalloyed steel intragranular ferrite (IGF) isothermal treatment thermomechanical processes controlled cooling

Surface Metallurgy of Nickle Base Superalloy

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International Journal of Minerals,Metallurgy and Materials 1999年第1期13卷 47-49页

作者： Xu Zhang Zhongmin Yang Jianxin Dong Xishan Xie Yuan Gao Zhong Xu (Material Science and engineering school, university of Science and Technology beijing, beijing 100083, china)(institute of Surface engineering, Taiyuan university of Technology, Taiyua Material Science and engineering school University of Science and Technology Beijing Beijing 100083 China institute of Surface engineering Taiyuan University of Technology Taiyuan 030024 China

The Double Glow Plasma Surface Alloying Technique, the Xu-Tee Process, is a new method to produce high quality alloying layer on the surface of less expensive materials. By using thes technique, the surface alloying layer similar to superalloy Inconel 625 has been obtained on the surface of three kinds of melallic materials (low carbon steel, industrial pure iron, stainless steel Cr18Ni9). The results of the composition and microstructure analyzed by Scanning Electron Microscopy (SEM) and X-Ray Uffrachon (XRD) show that the alloying layer consistS of y matrix and several precipitates (Laves intermetallic phase and carbide etc.). The electrochemical corrosion results show that the surface alloying layer formed on the surface of stainless steel and industrial pure iron have better corrosion resistance than that of nickel base alloy inconel 625 and stainless steel Cr18Ni9 in 3.5%NaCl solution. The exper iments indicate that it is an effective way to obtain the gradient surface alloying layer on the surfaces of steels by using Double Glow Plasma Surface Alloying Technique.

关键词： double glow nickel base alloy plasma surface alloying

A LINEAR HYBRID MODEL OF MSE AND BEM FOR FLOATING STRUCTURES IN COASTAL ZONES

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Journal of Hydrodynamics 2006年第6期18卷 649-658页

作者： ZHANG Jun MIAO Guo-ping school of Naval Architecture Ocean and Civil Engineering Shanghai Jiaotong University Shanghai 200030China The first Engineers Scientific research institute of the General Armaments Wuxi 214035 China

A linear hybrid model of Mild Slope Equation （MSE） and Boundary Element Method （BEM） is developed to study the wave propagation around floating structures in coastal zones. Both the wave refraction under the influence of topography and the wave diffraction by floating structures are considered. Hence, the model provides wave properties around the coastal floating structures of arbitrary shape but also the wave forces on and the hydrodynamic characteristics of the structures. Different approaches are compared to demonstrate the validity of the present hybrid model. Several numerical tests are carried out for the cases of pontoons under different circumstances. The results show that the influence of topography on the hydrodynamic characteristics of floating structures in coastal regions is important and must not be ignored in the most wave period range with practical interests.

关键词： hybrid model Mild Slope Equation (MSE),Boundary Element Method (BEM) marine floating structures,coastal regions wave propagation wave force

Experiments and sensitivity analyses for heat transfer in a meter-scale regularly fractured granite model with water flow

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Journal of Zhejiang university-Science A(Applied Physics & engineering) 2012年第12期13卷 958-968页

作者： Wei LU1,2,Yan-yong XIANG1 (1school of Civil engineering,beijing Jiaotong university,beijing 100044,china) (2State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,china institute of Water Resources and Hydropower research,beijing 100038,china) school of Civil engineering Beijing Jiaotong University Beijing China State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resources and Hydropower Research Beijing China

Experiments of saturated water flow and heat transfer were conducted for a meter-scale model of regularly fractured granite. The fractured rock model （height 1502.5 ram, width 904 mm, and thickness 300 mm）, embedded with two vertical and two horizontal fractures of pre-set apertures, was constructed using 18 pieces of intact granite. The granite was taken from a site currently being investigated for a high-level nuclear waste repository in china. The experiments involved different heat source temperatures and vertical water fluxes in the embedded fractures either open or filled with sand. A finite difference scheme and computer code for calculation of water flow and heat transfer in regularly fractured rocks was developed, verified against both the experimental data and calculations from the TOUGH2 code, and employed for parametric sensitivity analyses. The experiments revealed that, among other things, the temperature distribution was influenced by water flow in the fractures, especially the water flow in the vertical fracture adjacent to the heat source, and that the heat conduction between the neighboring rock blocks in the model with sand-filled fractures was enhanced by the sand, with larger range of influence of the heat source and longer time for approaching asymptotic steady-state than those of the model with open fractures. The temperatures from the experiments were in general slightly smaller than those from the numerical calculations, probably due to the fact that a certain amount of outward heat transfer at the model perimeter was unavoidable in the experiments. The parametric sensitivity analyses indicated that the tem- perature distribution was highly sensitive to water flow in the fractures, and the water temperature in the vertical fracture adjacent to the heat source was rather insensitive to water flow in other fractures.

关键词： Fractured granite Water flow Heat transfer Physical modeling Numerical calculation Sensitivity analysis

Matrix calculation of high-dimensional cross product and its application in automatic recognition of the endmembers of hyperspectral imagary

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Science china(Information Sciences) 2011年第1期54卷 197-203页

作者： GENG XiuRui1,ZHAO YongChao1,LIU SuHong2 & WANG FuXiang3 1Key Laboratory of Technology in Geo-spatial Information Processing and Application System, institute of Electronics,Chinese Academy of Sciences,beijing 100080,china 2State Key Laboratory of Remote Sensing Science,Jointly Sponsored by beijing Normal university and the institute of Remote Sensing Applications of Chinese Academy of Sciences, school of Geography,beijing Normal university,beijing 100875,china 3school of Electronics and Information engineering,Beihang university,beijing 100191,china Key Laboratory of Technology in Geo-spatial Information Processing and Application System Institute of Electronics Chinese Academy of Sciences Beijing China State Key Laboratory of Remote Sensing Science Jointly Sponsored by beijing Normal university and the institute of Remote Sensing Applications of Chinese Academy of Sciences School of Geography Beijing Normal University Beijing China school of Electronics and Information engineering Beihang University Beijing China

This paper gives the definition of the high-dimensional cross product and its calculation by extending the 3-D cross product definition into the high-dimensional vector *** on the properties of the cross product,the volume variance index(VVI)is proposed to be used in extracting automatically the endmembers of the hypherspectral imagery which eliminates the shortcoming of the traditional method of using simplex only where the extraction results were easily impacted by the abnormal pixels.A case study of endmembers extraction experiment using the VVI method with the AVIRIS data for Cuprite has shown a very good result.

关键词： endmember simplex hyperspectral imagery cross product

High Temperature Deformation of Al_2O_3/Cu Composites

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Journal of Materials Science & Technology 2001年第3期17卷 325-328页

作者： Jianjun WU. Yun ZHANG, Yanfei JIANG and Meiyun XUE Department of Material Science and engineering, hebei university of Technology, Tianjin 300130, china Tingquan LEI school of Materials Science and engineering, Harbin institute of Technology, Uarbin 15000 Dept. of Mat. Sci. and Eng. Hebei Univ. of Technol. Tianjin 300130 China

This work concerns with the high temperature deformation of internally oxidized Al2O3/Cu composites. The investigation revealed that dispersive alumina can obstruct dislocation sliding and define the subgrain size thereby improve significantly the strength of the materials at high temperature. The sliding of dislocations is a main deformation mechanism in the given temperature range. The sliding of grain boundary and diffusive creep play important roles at high temperature and low strain rate. The dispersoids can raise the recrystallization temperature to higher than 1223 K. Dynamic recovery is a main softening way under the experimental conditions. Higher deformation rate and lower deformation temperature imply a higher flow stress.

关键词： High Temperature Deformation of Al2O3/Cu Composites Cu Al