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Exact solution of the Schr dinger equation for the time-dependent harmonic oscillator

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Science Bulletin 1998年第13期 1066-1071页

作者： LI Yishen 1, 2 and HE Jingsong 1 1. department of mathematics, university of Science and Technology of china, Hefei 230026, china 2. Nonlinear Science Center, university of Science and Technology of china, Hefei 230026, china

By using the soliton theory, it is known that the exact solutions of the Schrdinger equation for the timedependent harmonic oscillator only need to solve an oscillation equation with respect to space variable and a... 详细信息

关键词： time_dependent harmonic oscillator Schrdinger equation Lax equation recursion operator.

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维柯研究综述及其反思

咸宁学院学报 2003年第2期23卷 8-11页

作者：雷武锋南京大学中文系江苏南京210093

维柯研究的历史与现状体现了维柯思想的独特价值 ,也是西方思想文化变迁的生动写照。“诗性智慧”不仅为现代西方文化反思提供了精神资源 ,也为人类精神科学的建立提供了方法论启示 ,这对中国当前的文化探索同样具有重要意义。

关键词：维柯研究综述维柯思想 “诗性智慧” 现代西方文化反思理性主义思想文化人类精神科学社会科学自然科学历史哲学

NANOSTRUCTURES OF FUNCTIONAL BLOCK COPOLYMERS

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Chinese Journal of Polymer Science 2000年第3期18卷 255-262页

作者： Guojun Liu department of Chemistry, university of Calgary, 2500 university Dr., NW, Calgary, Alberta, Canada T2N IN4 Univ Calgary Dept Chem Calgary AB T2N 1N4 Canada

Nanostructure fabrication from block copolymers in my group normally involves polymer design, synthesis, self-assembly, selective domain crosslinking, and sometimes selective domain removal. Preparation of thin films withnanochannels was used to illustrate the strategy we took. In this particular case, a linear triblock copolymer polyisoprenc-block-poly(2-cinnamoylethyl methacrylate)-block-poly(t-butyl acrylate), PI-b-PCEMA-b-PtBA, was used. Films, 25 to50 μm thick, were prepared from casting on glass slides a toluene solution of PI-b-PCEMA-b-PtBA and PtBA homopolymer,hPtBA, where hPtBA is shorter than the PtBA block. At the hPtBA mass faction of 20% relative to the triblock or the totalPtBA (hPtBA and PtBA block) volume fraction of 0.44, hPtBA and PtBA formed a seemingly continuous phase in the matrixof PCEMA and Pl. Such a block segregation pattern was locked in by photocrosslinking the PCEMA domain. Nanochannelswere formed by extracting out hPtBA with solvent. Alternatively. larger channels were obtained from extracting out hPtBAand hydrolyzing the t-butyl groups of the PtBA block. Such membranes were not liquid permeable but had gas permeabilityconstants ～6 orders of magnitude higher than that of low-density polyethylene films.

关键词： Nanostructures Block copolymers Nanochannel generation Self-Assembly Polyisoprene-b-poly(2-cinnanoylethyl methacrylate)-b-poly(t-butyl acrylate)

Cooling effect of ripped-stone embankments on Qing-Tibet railway under climatic warming

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Science Bulletin 2003年第6期48卷 598-604页

作者： LAI Yuanming1, ZHANG Luxin1 , ZHANG Shujuan1 & MI Long2 1. State Key Lab. of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, china 2. department of Civil Engineering, Northern Jiaotong university, Beijing 100044, china State Key Lab. of Frozen Soil Engineering Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou China department of Civil Engineering Northern Jiaotong University Beijing China

The heat convection in ballast mass and ripped-stone mass in railway embankments is the problem of heat convection in porous media. In order to calculate the temperature distribution of Qing-Tibet railway embankment, from the governing equations used to study forced convec-tion for incompressible fluids porous media, the finite ele-ment formulae for heat convection in porous media are de-rived by using Galerkin抯 method. The temperature fields of the traditional ballast embankment and the ripped-stone mass embankment, constructed on July 15, have been ana-lyzed and compared under the case that the air temperature in Qinghai-Tibetan Plateau will be warmed up by 2.0℃ in the future 50 years. The calculated results indicate that, the permafrost 5 m below the traditional ballast embankment will be thawed in the regions in which the air yearly-average temperature is larger than -3.5℃ or the yearly-average temperature at the native surface is larger than -1℃. The embankment will cause large thawing settlement. The rail-way embankment will be damaged by permafrost degrada-tion. The ripped-stone mass embankment can not only resist the effect of climatic warm up on it but also provide cool energy for the permafrost under it. It can assure permafrost stability and not subjected to thawing. Therefore, it is highly recommended that the ripped-stone mass embankment be taken as the Qing-Tibet railway embankment structure in high-temperature permafrost regions so that permafrost embankment can be protected as possible as we could.

关键词： cooling effect ripped-stone embankment climatic warming.

An Analysis Method of Business Application Framework

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Wuhan university Journal of Natural Sciences 2001年第Z1期6卷 218-223页

作者： He Ke\|qing 1,Fan Hui hua 1,Ying Shi 2 1.department of Computer Science, Wuhan university, Wuhan 430072, china 2.State Key Laboratory of Software Engineering, Wuhan university, Wuhan 430072, china department of Computer Science Wuhan University Wuhan 430072 China

We discuss the evolution of object oriented software development process based on software pattern. For developing mature software framework and component, we advocate to elicit and incorporate software patterns for ensuing quality and reusability of software frameworks. On the analysis base of requirement specification for business application domain, we present analysis method and basic role model of software framework. We also elicit analysis pattern of framework architecture, and design basic role classes and their structure.

关键词： object oriented software framework analysis pattern of architecture component role model

On Separation Index of Heegaard Splitings

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Communications in Mathematical Research 1999年第1期 53-58页

作者： Lei Fengchun and He Baihe (department of mathematics, Jilin university, Changchun, 130012)

§１．ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｃｏｎｃｅｐｔｏｆｒｅｄｕｃｉｂｌｅＨｅｅｇａａｒｄｓｐｌｉｔｉｎｇｓｗａｓｆｉｒｓｔｄｅｖｅｌｏｐｅｄｂｙＨａｋｅｎ［１］．Ｉｔｓｒｅｌａ－ｔｉｏｎｔｏｔｈｅｃｏｒｒｅｓｐｏｎｄ... 详细信息

§１．ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｃｏｎｃｅｐｔｏｆｒｅｄｕｃｉｂｌｅＨｅｅｇａａｒｄｓｐｌｉｔｉｎｇｓｗａｓｆｉｒｓｔｄｅｖｅｌｏｐｅｄｂｙＨａｋｅｎ［１］．Ｉｔｓｒｅｌａ－ｔｉｏｎｔｏｔｈｅｃｏｒｒｅｓｐｏｎｄｉｎｇ３－ｍａｎｉｆｏｌｄｓｃｏｎ...

关键词： Heegaard Splitting Separation Index Reducible 3 manifold

Current Efficiency of Low Temperature Aluminum Electrolysis Studied by Neural Network

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International Journal of Minerals,Metallurgy and Materials 1999年第2期13卷 107-110页

作者： Huimin Lu Zuxian Qiu Keming Fang Fuming Wang Yanruo Hong( Metallurgy School, university of Science and Technology Beijing, Beijing 100083, china)( department of Nonferrous Metallurgy, Northeastern university, Shenyang 110006, china) Metallurgy School University of Science and Technology Beijing Beijing 100083 China department of Nonferrous Metallurgy Northeastern University Shenyang 110006 China

A prediction model for Current Efficiency (CE) of low temperature aluminum electrolysis (LTAE) with the low molar ratioelectfolyte of Na3AIF6-AIF3 - CaF2-MgF2-LiF -Al2O3 system was investigated based on artificial neural network principles. The nonlinearmapping between CE of LATE and various electrolytic conditions was obtained from a number of experimental data and used to predictCE of LATE. The trsined neural networks possessed high precision and resulted in a good predicting effect. As a result, attificial neuralnetworks as a new cooperating and predicting technology provide a new approach to the further studies on low temperature aluminumelectrolysis.

关键词： low temperatre aluminum electrolysis current efficiency neural network prediction model low molar ratio electrolyte

测定粮食、水果、蔬菜稀土总量的二溴羧基偶氮胂比色法

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分析测试学报 2001年第1期20卷 69-71页

作者：胡谟彪胡烈宇罗玲四川省农业科学院分析测试中心四川成都610066 南京大学化学学院江苏南京210093

以一定比例的镧、铈、镨、钕、钐的氧化物配制的混合标准溶液在酸性条件下与二溴羧基偶氮胂反应 ,632nm处的吸光度在0～1.5mg/L范围内符合比耳定律 ,检出限为1.5μg/L,相关系数为0.9995。方法不需加掩蔽剂。试样实测结果的相对标准偏差<... 详细信息

以一定比例的镧、铈、镨、钕、钐的氧化物配制的混合标准溶液在酸性条件下与二溴羧基偶氮胂反应 ,632nm处的吸光度在0～1.5mg/L范围内符合比耳定律 ,检出限为1.5μg/L,相关系数为0.9995。方法不需加掩蔽剂。试样实测结果的相对标准偏差<7 % (n=5) ,加标回收率在84 %～108%之间。

关键词：稀土总量二溴羟羧基偶氮胂粮食水果蔬菜比色法测定方法

知识管理思想的起源——从情报学的发展看知识管理

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图书情报工作 2001年第1期45卷 23-27页

作者：丁蔚倪波南京大学信息管理系南京210093

通过情报学产生和发展的历史回顾,阐述引导情报学研究从科技情报领域转向经济情报领域的两大理论,说明情报学研究重心从竞争情报到知识管理转移的原因,指出知识管理将成为未来情报学研究的热点之一。最后总结知识管理研究必须摆脱情报... 详细信息

通过情报学产生和发展的历史回顾,阐述引导情报学研究从科技情报领域转向经济情报领域的两大理论,说明情报学研究重心从竞争情报到知识管理转移的原因,指出知识管理将成为未来情报学研究的热点之一。最后总结知识管理研究必须摆脱情报学过分依赖信息技术的认识误区。

关键词：知识管理情报学竞争情报理论研究发展趋势决策功能理论管理生态系统情报理论