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催化裂化汽提技术的现状与展望

石油化工设备技术 2006年第2期27卷 31-35页

作者：张永民时铭显卢春喜中国石油大学重质油国家重点实验室北京102249

催化剂汽提器是催化裂化装置中重要的组成部分,高效汽提技术的应用对催化裂化装置的经济效益和稳定操作都具有重要的意义。文章全面介绍了国内外出现的汽提新技术,并根据其不同的特点进行了分类,分别介绍了各类技术的特点,并分析了汽提... 详细信息

催化剂汽提器是催化裂化装置中重要的组成部分,高效汽提技术的应用对催化裂化装置的经济效益和稳定操作都具有重要的意义。文章全面介绍了国内外出现的汽提新技术,并根据其不同的特点进行了分类,分别介绍了各类技术的特点,并分析了汽提技术今后发展的方向,认为具有小流动单元和气固高效接触特点的格栅式和填料式汽提内构件技术和多段汽提技术将是今后汽提技术发展和应用的热点。通过对催化剂汽提研究方法的回顾,认为应该对汽提器内部的流动、传质和反应特性做更深层次的系统研究,以便最终形成更加完善的数学模型和工业设计方法。

关键词：催化裂化汽提技术内构件进展

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Preface

Journal of Computer Science & Technology 2010年第6期25卷 1101-1102页

作者： Prof. De-Yi Li, State Key lab.of Software Development Environment, Beihang university Beijing 100191, China, Prof.Zhi-Yong Liu, Institute of Computing Technology, Chinese Academy of Sciences Beijing 100190, China, Prof. Ke-Qing He, State Key lab.of Software Engineering, Wuhan university, Wuhan 430072 China, State Key lab.of Software Development Environment Beihang University Beijing China Institute of Computing Technology Chinese Academy of Sciences Beijing China State Key lab.of Software Engineering Wuhan University Wuhan China

The Internet technology is making changes to the design and usage of software systems as well as computers. In a networked computing environment, human-machine interaction, human-network interaction,

关键词： Cloud Computing Service Composition Network Software Agile Software Development China Computer Federation

Low Power Wide Dominos design in sub-65nm CMOS Technologies 8th

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Low Power Wide Dominos Design in sub-65nm CMOS Technologies

Performance gain with variable chunk size in GFS-like file systems

2006 8th International Conference on Solid-State and Integrated Circuit Technology

作者： Jinhui wang Na Gong Ligang Hou Limin Dong Wuchen Wu VLSI ＆ System lab Beijing University of Technology College of Electronic and Informational Engineering Hebei University

ISBN: (纸本)1424401607

＜正＞Two novel low power wide OR domino designs are presented in this *** the same delay time,the two designed dominos decrease the active power by 8.92%to 17.25%and 13.79%to 25.84%as compared to the standard dual V,dominos in a 45nm CMOS *** the meantime,the total leakage current is reduced significantly at two typical die temperatures.

关键词： Temperature Power (Psychology) Energy sources active power leakage currents Delay time CMOS technology

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通讯和计算机（中英文版） 2008年第6期5卷 54-60页

作者： YANG Zhi-feng TU Qi-chen FAN Kai ZHU Lei chen Ri-shan PENG Bo Networks lab Peking University Beijing 100871 China

基于Verilog HDL的多功能车辆总线编码器设计

维普期刊数据库评论

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铁路计算机应用 2009年第10期18卷 8-11页

作者：邝艳菊黄采伦周华张剑王靖陈特放黄晓煌湖南科技大学机械设备健康维护省重点实验室湘潭411201 中南大学信息科学与工程学院长沙410075

讨论多功能车辆总线MVB以及目前国内外MVB网络产品的开发情况,阐述IP核的基本特征及其在SOPC设计中的重要性。在此基础上,设计MVB Encoder模块的总体方案,采用Verilog硬件描述语言在QUARTUS II6.0上实现其IP核的设计,通过Modelsim SE6.2... 详细信息

讨论多功能车辆总线MVB以及目前国内外MVB网络产品的开发情况,阐述IP核的基本特征及其在SOPC设计中的重要性。在此基础上,设计MVB Encoder模块的总体方案,采用Verilog硬件描述语言在QUARTUS II6.0上实现其IP核的设计,通过Modelsim SE6.2b仿真平台对MVB主帧进行仿真验证。仿真结果表明设计的正确性,可为MVB网络产品的开发提供一种有效的实现方法。

关键词：多功能车辆总线编码器 IP核硬件描述语言

design and fabrication of erbium doped photosensitive fibers

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Science China(Technological Sciences) 2009年第5期52卷 1234-1241页

作者： LI Jian LIU Peng LU ShaoHua wang Jing MAO XiangQiao WEI Huai FU YongJun ZHENG Kai NING TiGang LI TangJun JIAN ShuiSheng Institute of Lightwave Technology Beijing Jiaotong UniversityBeijing 100044China Key lab.of All Optical Network&Advanced Telecommunication Network of EMC Beijing Jiaotong UniversityBeijing 100044China Physics Department of XingTai College Xingtai 054001China

A kind of erbium doped photosensitive fiber(EDPF) was proposed and fabricated,whose core was made of double layers named photosensitive layer and erbium doped *** double-layer core de-sign can overcome difficulties in fabrication of EDPF with single core design,*** conflict between the high consistency rare earth doping and high consistency germanium doping.A sample was fabri-cated through the modified chemical vapor deposition method combined with solution doping *** peak absorption coefficient was 48.80 dB/m at 1.53 μm,the background loss was lower than 0.1 dB/m,and the reflectivity of the fiber Brag gratings(FBG) written directly on the sample fiber was up to 97.3% by UV-writing ***,a C band tunable fiber laser was fabricated using the sample fiber,in which a uniform FBG was written directly on EDPFs as a reflector.A single wavelength lasing with a maximum wavelength tuning range of 1555.2―1558.0 nm was achieved *** this tuning range,the full-width at half maximum(FWHM) of the laser output was smaller than 0.015 nm and the side mode suppression ratio(SMSR) was better than 50 dB.

关键词： erbium doped fiber(EDF) photosensitivity modified chemical vapor deposition(MCVD) method solution doping technique fiber Bragg grating(FBG) fiber laser wavelength tunable

Weights Determination Based on Combined Objective and Subjective Method in Traffic Safety Evaluation

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Weights Determination Based on Combined Objective and Subjec...

Neuroprotective effects of human telomerase reverse transcriptase on beta-amyloid fragment 25-35-treated human embryonic cortical neurons

The Sixth International Forum of Automotive Traffic Safety

作者： Lan Qiao Li Tibing Xu Jun (State Key lab.ratory of Automotive Safety & Energy Tsinghua university Beijing China 100084)

＜正＞This paper suggests an evaluation index system which combines qualitative indexes and quantitative indexes for road traffic safety *** the drawbacks of some generally used weights determination approaches,this paper proposes a new approach for assessing a certain road traffic safety situation with quantitative and qualitative *** approach involves the analytic hierarchy process and least squares *** addition,the index weights of the index system for road traffic safety evaluation are determined by this *** result shows the validity and accuracy of the suggested model.

关键词： weights determination approach evaluation index system road traffic safety evaluation

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Neural Regeneration Research 2009年第6期4卷 405-412页

作者： Lingping Kong Lingzhi Wu Jie Zhang Yaping Liao Huaqiao wang Department of Anatomy and Brain Research Zhongshan School of Medicine Sun Yat-sen University Guangzhou 510080 Guangdong Province China Meizhou People's Hospital Meizhou 514031 Guangdong Province China Department of Anatomy Preclinical College Guangdong University of Pharmacy Guangzhou 510006 Guangdong Province China Department of Bioscience Bengbu Medical College Bengbu 233030 Anhui Province China

BACKGROUND： Numerous current studies have suggested that human telomerase reverse transcriptase （hTERT） gene has neuroprotective effects and can inhibit apoptosis induced by various cytotoxic stresses; however, the mechanism of action remains unknown. OBJECTIVE： To evaluate the neuroprotective effects and possible mechanism of action of hTERT gene transfection in human embryonic cortical neurons treated with beta-amyloid fragment 25-35 （AI325-35）. design, TIME AND SETTING： The randomized, controlled and molecular biological studies were performed at the Department of Anatomy and Brain Research, Zhongshan School of Medicine, Sun Yat-sen university, China, from September 2005 to June 2008. MATERIALS： AdEasy-1 Expression System was gifted by Professor Guoquan Gao from Sun Yat-Sen university, China. Human cortical neurons were derived from 12-20 week old aborted fetuses, obtained from the Guangzhou Maternal and Child Health Hospital, China. Mouse anti-Odk5 and mouse anti-p16 monoclonal antibodies （lab.Vision, USA）, and mouse anti-hTERT monoclonal antibody （Epitomics, USA）, were used in this study. METHODS：（1） Recombinant adenovirus vectors, encoding hTERT （Ad-hTERT） and green fluorescent protein （Ad-GFP）, were constructed using the AdEasy-1 Expression System. Human embryonic cortical neurons in the Ad-hTERT group were transfected with Ad-hTERT for 1-21 days. Likewise, human embryonic cortical neurons in the Ad-GFP group were transfected with Ad-GFP for 1-21 days. Human embryonic cortical neurons in the control group were cultured as normal. （2） Human embryonic cortical neurons in the Ad-hTERT group were treated with 10 pmol/L Aβ25-35 for 24 hours. Normal human embryonic cortical neurons treated with 10 pmol/Lβ25.35 for 24 hours served as a model group. Human embryonic cortical neurons in the Ad-GFP and control groups were not treated with Aβ25-35. MAIN OUTCOME MEASURES： Expression of hTERT in human embryonic cortical neurons was evaluated by immunocytochemical staining

关键词： human telomerase reverse transcriptase cortical neuron human embryo Alzheimer's disease beta-amyloid fragment 25-35 Cdk5 p16

Analysis and Measurement of Mass Transfer in Airlift Loop Reactors

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Chinese Journal of Chemical Engineering 2006年第5期14卷 604-610页

作者：张同旺王铁峰王金福 Beijing Key lab.of Reaction Engineering & Technology Tsinghua University

Inter-phase mass transfer is important to the design and performance of airlift loop reactors for either chemical or biochemical applications, and a good measurement technique is crucial for studying mass transfer in multiphase systems. According to the model of macro-scale mass transfer in airlift loop reactors, it was proved that the airlift loop reactor can be regarded as a continuous stirred tank reactor for measuring mass transfer coefficient. The calculated mass transfer coefficient on such a basis is different from the volumetric mass transfer coefficient in the macro-scale model and the difference is discussed. To describe the time delay of the probe response to the change of oxygen concentration in the liquid phase, a model taking into account the time constant of response is es-tablished. Sensitivity analysis shows that this model can be used to measure the volumetric mass transfer coefficient. Applying this model to the measurement of volumetric mass transfer coefficient in the loop reactor, results that co-incide with the turbulence theory in the literate were obtained.

关键词： airlift loop reactor mass transfer model sensitivity analysis