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Preparation of Superfine-Cemented Carbide by Spark Plasma Sintering

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Journal of Wuhan University of Technology(Materials Science) 2006年第1期21卷 42-45页

作者：解迎芳王兴庆 School of Materials Science and Engineering Shanghai University Shanghai 200072 China

92WC-8Co puwder mixture with superfine-tungsten carbide was respectively sintered by spark plasma sintering（ SPS ） and sintering isostutic pressure （SIP）. Complete dense samples with 200 nm WC grains and 94.2HRA hardness were prepared by spark plasma sintering at 1 150 ℃ and under 4.5 kN for 5 minutes. SIP was carried out at 1 400 ℃ for 30 minutes with a result of 300-400 nm WC grains and 93 HRA hardness. The results show that sintering temperature is greatly decreased by SPS, sintering time is largely shortened and WC grain growth is effectively retarded. Micropores and drawb（wks in superfine-cemented carbide made by SPS are greatly declined, which is very useful to improving nwehanical properties.

关键词： spurk plasma sintering cemented carbide superfine grain sintering mechanism

A novel multi-functional cell-based microphysiometer

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Progress in Natural Science:Materials International 2006年第8期16卷 808-816页

作者： XU Ying, XU Gaixia, LIU Qingjun, CAI Hua, LI Yan, LI Rong and WANG Ping (Biosensor National Special Laboratory, Key Laboratory of Biomedical Engineering of Education Ministry, Department of Biomedical Engineering, Zhejiang University, Hangzhou 310027, China State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, shanghai 200050, China) Biosensor National Special Laboratory Key Laboratory of Biomedical Engineering of Education Ministry Department of Biomedical Engineering Zhejiang University Hangzhou 310027 China State Key Laboratory of Transducer Technology Chinese Academy of Sciences Shanghsi 200050 China

This paper presents a novel multi-functional microphysiometer for simultaneous measurements of several extracellular ion concentrations and action potential measurement in living cells based on MLAPS (multi-light addressable potentiometric sensor). In the microphysiometer, sorts of sensitive membranes are illuminated in parallel with n light sources at working frequencies, and the response amplitudes of each frequency component can be measured on-line by parallel processing algorithm. In the experiments, the relations of the extracellular environmental H+, Na+, K+, Ca2+ under the effects of western medicines (dilantin, phenobarbital sodium) and Chinese drugs (scutellaria, medlar, hemlock parsley) were analyzed, and the effects of several drugs were evaluated. Moreover, the action potential signals of different cell types (cardiac myocytes and neurons) could be measured and analyzed by LAPS. By detecting these parameters, the system can monitor the real-time process of the cell metabolism and action potential, observe the functional responses of different kinds of membrane-bound receptors, and evaluate the activities of drugs.

关键词： multi-functional microphysiometer cell-based biosensor cellular ion concentration measurement cellular action potential.

Scalability Technologies for Wireless Mesh Networks

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ZTE Communications 2008年第2期6卷 11-14页

作者： Hu Honglin (shanghai Research Center for Wireless Communications , shanghai 200050, China )

The continuous increase of data transmission density in wireless mobile communications has posed a challenge to the system performance of Wireless Mesh Networks (WMNs ). There is a rule for wireless Ad hoc networks that the average node capacity decreases while the number of nodes increases , so it is hard to establish a large - scale wireless Mesh network. Network scalability is very important for enhancing the adaptive networking capability of the wireless Mesh network. This article discusses key scalability technologies for Mesh Base Stations (BSs ) and Mesh Mobile Stations (MSs ), such as channel allocation, intelligent routing , multi- antenna , node classification, Quality of Service (QoS) differentiation and cooperative transmission.

关键词： Mesh QoS Scalability Technologies for Wireless Mesh Networks WMNs

MOLECULAR DYNAMIC SIMULATIONS OF MOLTEN NaF

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Acta Metallurgica Sinica(English Letters) 1992年第7期5卷 28-32页

作者： ZHANG Jing CHENG Zhaonian CHEN Nianyi, shanghai Institute of Metallurgy, Academia Sinica, China CHENG Zhaonian Associate Professor, shanghai Institute of Metallurgy, Academia Sinica, shanghai 200050, China

The structure and transport properties in molten NaF have been studied using the method of molecular dynamics simulation. The calculations are based on two models of interionic potentials, which are Fumi-Tosi potential (FT) and the Fumi-Tosi potential without Van der Waals attractive item (FT). The radial distribution function (RDF) and the Na^+ and F^- self-diffusion coefficients have been calculated. The calculated results are in good agreement with the experimental ones. The calculation shows that the two models give nearly identical radial distribution function and self-diffusion coefficient, but the results of FTpotential are a little better than those of FT potential.

关键词： molten NaF molecular dynamics computerized simulation

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SiC颗粒强韧MoSi_2复合材料

无机材料学报 1994年第2期9卷 232-238页

作者：郑灵仪金燕苹李鹏兴王本民金璐上海交通大学材料科学系中国科学院上海硅酸盐研究所

采用湿法混合及热压成型法制成不同体积百分比（１０、２０、３０ｖｏｌ％）的ＳｉＣｐ／ＭｏＳｉ２复合材料．运用维氏压痕法对这些材料进行室温断裂韧性（Ｋ１ｃ）的估算；测试了室温和高温（１２００℃）的三点弯曲强度．实验结果表... 详细信息

采用湿法混合及热压成型法制成不同体积百分比（１０、２０、３０ｖｏｌ％）的ＳｉＣｐ／ＭｏＳｉ２复合材料．运用维氏压痕法对这些材料进行室温断裂韧性（Ｋ１ｃ）的估算；测试了室温和高温（１２００℃）的三点弯曲强度．实验结果表明，复合材料的力学性能都比ＭｏＳｉ２基材有较大的提高．

关键词：颗粒复合材料碳化硅二碳化钼

Waiting time in block fading MIMO systems with dynamic-depth interleaving

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Science China(Information Sciences) 2010年第8期53卷 1622-1627页

作者： GUO HaiYou 1,2 , HU HongLin 1,2 & ZHANG Yan 3 1 Key Laboratory of Wireless Sensor Network & Communication, shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, shanghai 200050, China 2 shanghai Research Center for Wireless Communications, shanghai 200335, China 3 Simula Research Laboratory, Lysaka 1325, Norway Key Laboratory of Wireless Sensor Network & Communication Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai China shanghai Research Center for Wireless Communications Shanghai China Simula Research Laboratory Lysaka Norway

Interleaving is an efficient measure to resolve the bursty errors in a block fading multiple-inputs multiple-outputs (MIMO) system. For the metrics of network layer, interleaving exerts two conflicting effects on the ultimate delay performance. Specifically, interleaving can advantageously reduce data transmit time. On the other hand, it comes at a cost, entailing an undesired delay penalty resulting from interleaving depth. Here, we exploit a unified model to accommodate these two conflicting effects, and derive the average waiting time in block fading MIMO systems with dynamic-depth interleaving. Such a unified model is developed with a combined method of both information theory and queueing theory. Therefore, the model is capable of characterizing the randomness of data arrival process, hence the nature of dynamic-depth interleaving. The methodology and the results are applicable to designing, evaluating, and tuning the practical interleaving systems.

关键词： dynamic-depth interleaving multiple-inputs multiple-outputs (MIMO) queueing analysis waiting time

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直接凝固注模成型技术

无机材料学报 1998年第3期13卷 269-274页

作者：高濂中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室上海200050

直接凝固注模成型是瑞士苏黎世联邦高等工业学院***实验室发明的一项新的成型技术，具有素坯密度高、密度均匀、坯体收缩和形变极小等优点，特别适用于大尺寸、复杂形状的陶瓷部件的成型，有广阔的应用前景．本文着重介绍了直接凝固注... 详细信息

直接凝固注模成型是瑞士苏黎世联邦高等工业学院***实验室发明的一项新的成型技术，具有素坯密度高、密度均匀、坯体收缩和形变极小等优点，特别适用于大尺寸、复杂形状的陶瓷部件的成型，有广阔的应用前景．本文着重介绍了直接凝固注模成型的基本原理和技术关键．

关键词：凝固成型注塑成型陶瓷

Synthesis and Characterization of Mesoporous Silicon Oxynitride MCM-41 with High Nitrogen Content

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Journal of Wuhan University of Technology(Materials Science) 2005年第2期20卷 32-34页

作者：张存满 School of Material Science and Engineering Tongji UniversityShanghai 200092China Ph D

Mesoporous silicon oxynitrides MCM-41 were synthesized successfully. The resulting materials not only have high nitrogen contents and good structural characteristics of MCM-41 (high surface area, narrow pore size distribution and good order), but also are amorphous. The composition and structure of the materials were investigated by CNH element analysis, XPS, Si MAS NMR, XRD, HRTEM and N-2 sorption, respectively. Mesoporous silicon oxynitrides MCM-41 with a high nitrogen content are still non-crystal (amorphous).

关键词： mesoporous silicon oxynitride MCM-41 high nitrogen content

Investigation　on　Phase　Transition　of　Ferroelectric　Ceramics　of　Lead　Titanate─Zirconate　Doped　with　Niobium　and　Tin─Substituted　Lead　Titanate─Zirconate　by　DTA，DSC　and　PRD

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化学世界 1996年第S1期37卷 229-231页

作者： $$$$Lu Changwei Xi Tonggeng Yang Xuehua Chen Yunxian Xu Yibin Dong Xianlin Duan Lian(shanghai Institute of Ceramics, Chinese Academy of Sciences shanghai 200050)

ＩｎｖｅｓｔｉｇａｔｉｏｎｏｎＰｈａｓｅＴｒａｎｓｉｔｉｏｎｏｆＦｅｒｒｏｅｌｅｃｔｒｉｃＣｅｒａｍｉｃｓｏｆＬｅａｄＴｉｔａｎａｔｅ─ＺｉｒｃｏｎａｔｅＤｏｐｅｄｗｉｔｈＮｉｏｂｉｕｍａｎｄＴｉｎ─Ｓｕｂｓｔｉｔｕ... 详细信息

ＩｎｖｅｓｔｉｇａｔｉｏｎｏｎＰｈａｓｅＴｒａｎｓｉｔｉｏｎｏｆＦｅｒｒｏｅｌｅｃｔｒｉｃＣｅｒａｍｉｃｓｏｆＬｅａｄＴｉｔａｎａｔｅ─ＺｉｒｃｏｎａｔｅＤｏｐｅｄｗｉｔｈＮｉｏｂｉｕｍａｎｄＴｉｎ─ＳｕｂｓｔｉｔｕｔｅｄＬｅａｄＴｉｔａｎａｔｅ─Ｚ...

关键词： Transition