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International Conference on Computer Supported Cooperative Work in Design

作者： Bo Yang Yi Li Yuehui Chen Runzhang Yuan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Science and Engineering China School of Information Science and Technology Jinan University China

ISBN: (纸本)184000025

technology trends in today's cooperative design environments are making it more and more important to monitor the network performance and ensure the network security. This paper describes the design and implementation of a distributed network traffic monitoring system based on embedded NetFlow hardware and software engines. The system architecture and design principles were introduced in the paper, some discussions were also presented about the NetFlow-based network monitoring technologies. The system had been successfully used to monitor highspeed campus networks at full wire speed without packet sampling in scenarios where commercial NetFlow collectors could not be used due to their limitations. Results show that this is an effective mechanism to identify, diagnose, and determine controls for network activities in CSCW environments and other network-based applications.

关键词： Monitoring Intelligent networks Telecommunication traffic Switches materials science and technology Sampling methods Probes Protocols Network synthesis Information science

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Recent development in nano and graded thermoelectric materials

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8th International Symposium on Multifunctional and Functionally Graded materials, FGM2004

作者： Zhang, Qing-Jie Tang, Xin-Feng Zhai, Peng-Cheng Niino, Masayuki Endo, Cyoji State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Wuhan 430070 China Japan Aerospace Exploration Agency 1 Kimigaya-Koganezawa Kakuda Miyagi 981-1525 Japan Foundation for Promotion of Japanese Aerospace Technology 1-16-6 Izumi Chou Sendai Miyagi 981-3133 Japan

ISBN: (纸本)0878499709

In 2003, a joint research project entitled "Nano and graded thermoelectric materials/Photovoltaic-thermoelectric-wind power generation" is established in cooperation among research institutes from Japan and China. The major research institutes include state key laboratory of advanced technology for materials synthesis and processing (Wuhan University of technology, China), Shanghai Institute of Ceramics (Chinese Academy of Sciences, China), state key laboratory of New Ceramics and Fine processing (Tsinghua University, China), Japan Aerospace Exploration Agency (JAXA, Japan) and Foundation for Promotion of Japanese Aerospace technology (JAST, Japan). The main aim of this project is to develop a photovoltaic-thermoelectric-wind power generation system with high efficiency solar energy conversion. The key works of the project include: (1) fabrication of high efficiency nano thermoelectric materials with a maximum figure of merit Z≥ 1.3;(2) design and fabrication of nano graded thermoelectric material/component with efficiency conversion larger than 12% for wide temperature range and (3) design and construction of photovoltaic- thermoelectric coupled power generation system. The recent progress about the joint research project is reported in this paper. Emphasis is put on the mechanism, design and fabrication of high efficiency nano graded thermoelectric materials. The future research plan is also mentioned in brief.

关键词： Nanostructured materials

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Study on low expansion and transparent glass-ceramic of Li 2O-Al2O3-SiO2 system

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Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal materials and Engineering 2005年第SUPPL. 1 PART 1期34卷 395-396页

作者： Qiu, Huiguang Shen, Qiang Wang, Chuangbin Li, Meijuan Zhang, Lianmeng State Key Lab. of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

In this paper, transparent Li2O-Al2O 3-SiO2 system glass-ceramic with low expansion was prepared by melting method, using SiO2, Al2O3 Li2CO3 as raw materials, a small amount of alkaline-earth metal oxide, clarify additive and nucleating agent (TiO2, ZrO 2). The glass-ceramic was nucleated and crystallized under different temperature and time, according to the DTA. The results show that the glass-ceramic of Li2O-Al2O2-SiO2 system could be obtained by being nucleated at 550°C for 2 hours and crystallized at 550°C for 1 hour. The system was fully compact. The crystal size in the glass-ceramics was small and homogenous, and its main crystalloid was β-quartz. The expansion coefficient of the glass-ceramics was 2.262×10-7/°C(0 [similar to] 900°C)and the density was 2.5 g/cm3.

关键词： Glass-ceramic Li2O-Al2O3-SiO2 Low-expansion Transparent

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In-situ reaction synthesis of dual-phase ceramic reinforced copper-based composites

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Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of technology 2005年第11期27卷 8-10页

作者： Zhu, Xiao-Guang Wang, Wei-Min Zhang, Jin-Yong State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

Among the preparing methods of ceramic particles reinforced metal matrix composites, the in-situ reaction synthesis technology has many technical and economical advantages over other traditional methods obviously. Several principal techniques to prepare metal matrix composites by in-situ reactive synthesis method were analyzed in this paper. Based on the analysis, a kind of preparing by using SHS and HP technique which was combustion and in-situ reaction synthesis of dual-phase ceramic reinforced copper-based composites was given. The impact of preparing condition on the structure and the behavior of the material were also researched. At last, some fundamental characteristics of the copper-based composite were studied, compared with the pure copper this kind of copper-based composite kept the electric conductivity and thermal conductivity above 80 percent, at the same time the wear resistance improved 6 times.

关键词： Combustion synthesis Copper-based composite In-situ reaction synthesis

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Influence of nano pulverization on structure and extraction percent of angelica

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Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of technology 2005年第7期27卷 23-25页

作者： Ma, Pei-Yan Fu, Zheng-Yi Su, Yan-Li State Key Lab. of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China School of Sciences Wuhan University of Technology Wuhan 430070 China

The nano particles of angelica were prepared by high-speed centrifugal sheering (HSCS) pulverizer. The particles were characterized by ZetaPALS light scattering granulometric analyzer, optical microscope and SEM. HPLC was employed to determine the content of ferulic acid, which is the indes ingredient of angelica. Experimental results showed that the average size of solid particle was 76.5 nm after nano-pulverization. The great majority of the plant cell was broken. After nano-pulverization, extraction percent of ferulic acid was increased by 12.95%.

关键词： Angelica HPLC Microscopic characteristics Nano particles

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Effect of Sm2O3 on the densification and thermal conductivity of spark plasma sintered AIN ceramics

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Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal materials and Engineering 2005年第SUPPL. 1 PART 2期34卷 821-822页

作者： Li, Meijuan Zhang, Lianmeng Li, Tao Shen, Qiang Yu, Mingqing Wuhan University of Technology Wuhan 430070 China Research Institute of Synthetic Crystals Beijing 100083 China State Key Lab. of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

Aluminum nitride (AlN) ceramic is difficult to sinter through conventional sintering processes. Spark plasma sintering (SPS) was used to sinter it in this study. A pulsed direct current was applied to the AlN powder in SPS. It engendered concentrated heating in the sinter, and then accelerated the diffusion and contact of AlN particle surfaces. With sintering additive Sm 2O3, the AlN powder was sintered into near-theoretical density in a considerably shorter time cycle compared with conventional sintering processes. The effects of quantity of additive Sm2O 3 and sintering temperature on densification of AlN samples were investigated. Results indicated that the addition of Sm2O3 enhanced the densification of AlN ceramic and lowered the sintering temperature. The AlN ceramics prepared by SPS method had homogeneous crystals. The crystals grains grew well. The Sm-Al-O compounds were created in grain boundary by reaction between Sm2O3 and Al 2O3 on AlN particle surface during the sintering. The reaction effectively accelerated the diffusion among the AlN grains, speeded the densifications of the sinter. And it was favorable to preserve the integrity of the AlN crystal lattice. As a result, the AlN sinter obtained a good thermal conductivity, which was as high as 150W/(m·K).

关键词： AlN ceramic Sm2O3 Spark plasma sintering (SPS) Thermal conductivity

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Hydrothermal synthesis, crystal structure and characterization of the complex [Cu(C12H8N2) · (H2O)2]SO4

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Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of technology 2005年第4期27卷 1-4页

作者： Jin, Su-Rong Zhang, Lian-Meng Zhao, Wei-Feng Hu, Xue-Lei State Key Lab. of Advanced Technology for Materials Synthesis and Processing Wuhan Univ. of Technology Wuhan 430070 China Sch. of Chemical Engineering and Pharmaceutics Wuhan Inst. of Chemical Technology Wuhan 430074 China

The title complex [Cu(C12H8N2) · (H2O)2]SO4 was synthesized by hydrothermal method and characterized by elemental analysis, IR and X-ray single crystal structural analysis. The crystal structure indicates that the compound forms a stratiform, built from the SO42- and [Cu(C12H8N2) · (H2O)2]2+ through hydrogen bonds. The chemical formula weight of complex is 375.84. The crystal structure is monoclinic, pace group C2/c with a = 1.485 3(3) nm, b = 1.381 1(3) nm, c = 0.701 0(14) nm, β = 108.650°, V= 1.362 5(15) nm3, Dc = 1.832 g/cm3 ,F(000) = 764, Z = 4,R1 = 0.0290, wR2 = 0.0862. The result of the single crystal X-ray diffraction analysis is in agreement with that of IR measurement, both of them show that the Cu2+ is coordinated by two nitrogen and two oxygen. In addition, the thermostability and IR spectral of the compound were discussed.

关键词： Copper complex Crystal structure Hydrothermal synthesis

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Transient thermochemical analysis of liquefied petroleum gas vessel under pool fire surrounding

Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/...

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Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/Journal of Wuhan University of technology (Transportation Science and Engineering) 2005年第2期29卷 190-193页

作者： Yin, Qizhi Xiao, Jinsheng Zhao, Zaili Yang, Bo Sch. of Energy and Power Engineering Wuhan Univ. of Technol. Wuhan 430063 China State Key Lab. of Advanced Technology for Materials Synthesis and Processing Wuhan Univ. of Technol. Wuhan 430072 China

The transient temperature field analysis aims at the thermal response of LPG vessel under pool fire surrounding environment. The finite element analysis method is used to calculate the temperature field. The thermal boundary conditions of LPG vessel are determined according to heat transfer theory and calculated by the software PLGS99. The results show that the maximum temperature gradient of vessel appears near the highest surface where the liquid can reach, and fluctuation of liquid surface is the main reason of high temperature gradient.

关键词： Finite element analysis Liquefied petroleum gas Pressure vessel Temperature field

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Performance of hydrogen storage of carbon nanotubes decorated with palladium

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中国有色金属学会会刊：英文版 2004年第5期14卷 996-999页

作者：木士春唐浩林钱胜浩潘牧袁润章 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

Carbon nanotubes（CNTs） decorated with palladium were synthesized and applied to hydrogen storage of gas phase. The results show that the amount of hydrogen storage of the decorated CNTs is up to 3.9%（mass fraction）, of which, almost 85% H2 can be desorbed at ambient temperature and pressure, while the non-decorated CNTs has a poor performance of hydrogen storage（only about 0.5%H2, mass fraction）. These indicate that it is feasible to enhance the performance of hydrogen storage of CNTs by further decoration with hydrogen-storing metals or alloys.

关键词：钯 CNTs 储氢合金碳 pb 储氢性能

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synthesis, Crystal Structures and Characterization of Ba5LiTiNb9O30

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Chinese Journal of Chemistry 2004年第5期22卷 434-436+406页

作者：刘韩星邹龙周建方亮张高科欧阳世翕 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Tech-nology Hubei 430070 China

A new niobate compound with the chemical composition of Ba5LiTiNb9O30 was synthesized by doping Li+ into the system BaO-TiO2-Nb2O5 in conventional solid state reaction method. The crystalline structure was determined by X-ray diffraction analysis (XRD). The results showed that crystal structure of Ba5LiTiNb9O30 belongs to tetrago-nal tungsten bronze structure with space group P4bm and its unit cell parameters: a=b=1.2512(2) nm, c=0.4008(5) nm. The microstructure of reaction products was observed by scanning electron microscopy (SEM).

关键词： niobate tungsten bronze structure XRD solid state reaction SEM

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