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基于个性化信息服务的网络信息资源管理

图书情报工作 2002年第6期46卷 75-77页

作者：黄明杰张萍北京大学第一医院图书馆北京100034 北京师范大学管理学院北京100875

分析因特网信息资源管理存在的问题,提出基于个性化信息服务的网络信息资源管理方式,阐明个性化信息服务的内容和技术支撑。

关键词：个性化信息服务网络信息管理用户技术支持个性化信息代理系统推送技术

Molecular Dynamics Studies on Thermal Behavior of a FAU-type Zeolite

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Chinese Chemical Letters 1999年第6期10卷 515-518页

作者： Ting Jun HOU Ming Juan JI Hui Liu Xiao Wei Huang Xue Qi Ye Xing Yun Liu Xiao Jie XU (Chemistry Department. Beida-Jiuyuan Molecular Design Laboratory. Peking university. beijing 100871)(Graduate school of Chinese Academy of sciences. Beiing 100039) Chemistry Department Beida-Jiuyuan Molec. Des. Laboratory Peking University Beijing 100871 China Grad. Sch. of Chinese Acad. of Sci. Beijing 100039 China

Molecular Dynamics (MD) simulations of siliceous FAU-type zeolite were carried out at various temperatures. to investigate its thermal behaviors. From the study. we found that pure silicon fanjasite showed different thermal behaviors below 1500K and above 1500K. its cell volume gradually shrinks with the rising of the temperature below 1500K. the cell volume of the zeolite changes little above 1500K.

关键词： Zeolite molecular dynamics(MD) thermal behavior

Several Characteristics of Granular Sludge Blanket and Granular Sludge in Interior Diversion-EGSB Reactor

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地学前缘 2009年第S1期16卷 74-74页

作者： Guang Li,Baoliang Geng school of Water Resources & Environment,china university of Geosciences(beijing),beijing 100083,china.

The influence of up-flow velocity on the working state and characteristics of the granular sludge blanket in Interior Diversion Expanded Granular Sludge Blanket（ID-EGSB）reactor for treating brewery wastewater were studied in this *** results show that the proper up-flow velocity（Vup）should be 2.1-3.3 m/h with the COD concentration of 18215-18304 mg/L,while the sludge bed reactor is inflated with expansion rate of 43.7%.When the organic loading rate reaches to 18.22-18.30 kgCOD/(m3·d-1),COD removal rate remains stabilized above 85.3%and the reactor ran without plug

关键词： brewery wastewater expanded granular sludge EGSB

Crystallographic Texture of MgO and its effect on the growth of BaTiO3 thin films by RF sputtering

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Crystallographic Texture of MgO and its effect on the growth...

International Conference on Superconducting Materials(ICSM 2006)

作者： Liang Qiao and Xiaofang Bi school of Material Science and Engineering, beijing university of Aeronautics and Astronautics, beijing 100083, china

In this work, MgO thin films were prepared by rf magnetron sputtering technique on two different substrates of Si (100) wafers and amorphous glasses. The influence of different deposition conditions such as substrate temperature, Ar pressure, film thicknesses on the crystal structure of MgO thin films were studied. BaTiO3 ferroelectric thin films were subsequently deposited on the MgO films. The XRD results showed that the orientation of MgO films was dependent greatly on the substrate temperature. A highly (100) oriented MgO thin films were obtained at the temperature of 800℃. The crystallographic texture has been deteriorated rapidly as the argon pressure decreased to 1.0 Pa. It has been also found that the film thickness has a great influence on the film orientation. High substrate temperature, high argon pressure and a certain thickness appear to be favorable for formation of a good texture for the MgO films. The structure and microstructure of the BaTiO3 films were various both with deposition conditions and with the crystallographic texture of the MgO. A highly (001) oriented ferroelectric BTO film was obtained on the MgO films with an optimized deposition conditions.

关键词： MgO films BTO films highly-orientation RF sputtering

Gibberellin indirectly promotes chloroplast biogenesis as ameans to maintain the chloroplast population of expanded cells

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Gibberellin indirectly promotes chloroplast biogenesis as am...

从植物科学到农业发展——2012全国植物生物学大会

作者： Xingshan Jiang~1,Heying Li~2,Ting Wang~(2,5),Changlian Peng~1,Haiyang Wang~(3,4),Hong Wu~(2*),Xiaojing Wang~(1*) 1 Guangdong Provincial Key Laboratory of Biotechnology for Plant Development,College of Life sciences,South china normal university,Guangzhou 510631,china. 2 State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources,South china Agricultural university,Guangzhou 510642,china. 3 College of Life sciences,capital normal university,beijing 100048,china. 4 Department of Molecular,Cellular,and Developmental Biology,Yale university,New Haven, Connecticut 06520-8104,USA.

Chloroplast biogenesis needs to be well coordinated with cell division and cell expansion during plant growth and development to achieve optimal photosynthesis *** studies showed that gibberellins(GA) regulate many important plant developmental processes,including cell division and cell ***,the relationship between chloroplast biogenesis with cell division and cell expansion and how GA coordinately regulates these processes remain poorly *** this study,we showed that chloroplast division was significantly reduced in the GA-deficient mutants of Arabidopsis (gal-3) and rice(dl8-AD),accompanied by reduced expression of several chloroplast division-related ***,the chloroplasts of both mutants exhibited increased grana stacking compared to their respective wild-type plants,suggesting that there might be a compensation mechanism linking chloroplast division and grana stacking.A time-lapse analysis showed that cell expansion-related genes tended to be up-regulated earlier and more significantly than the genes related to chloroplast division and cell division in GA-treated gal-3 leaves,suggesting the possibility that GA may promote chloroplast division through their impact on leaf mesophyll cell ***,our cellular and molecular analysis of the GA-response signaling mutants suggest that RGA and GAI are the major repressors regulating GA-induced chloroplast division,but other DELLA proteins(RGLl,RGL2 and RGL3) also play a role in repressing chloroplast division in *** together,our data show that GA plays a critical role in controlling and coordinating cell division,cell expansion and chloroplast biogenesis through regulating the DELLA protein family in both dicot and monocot plant species.

关键词： gibberellin DELLA proteins chloroplast biogenesis chloroplast division cell expansion grana stacking.

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风险社会的刑事政策与刑法

法学论坛 2011年第4期26卷 21-25页

作者：卢建平北京师范大学刑事法律科学研究院北京100875

风险社会理论给予我们的启示在于,今天人类所面临的巨大风险也是人类集体努力的副产品,因此需要人类在连带主义基础上的集体分担,而以责任(刑罚)个别化为显著标志的刑法,绝非防御或者控制风险的最佳手段。在风险社会,刑法仍然只能担当"... 详细信息

风险社会理论给予我们的启示在于,今天人类所面临的巨大风险也是人类集体努力的副产品,因此需要人类在连带主义基础上的集体分担,而以责任(刑罚)个别化为显著标志的刑法,绝非防御或者控制风险的最佳手段。在风险社会,刑法仍然只能担当"最后法"(Ultima ratio)的角色,而这一角色只能建立在保障人权和弘扬法治的价值基础之上。欲以刑法为急先锋以抗制风险,非但不能保卫社会、实现社会保护的功能,反而会牺牲社会及其成员的权益、丧失人权保障的功能,因此,刑法乃至刑事政策本身的风险也是我们时刻必须警惕的。

关键词：风险社会刑事政策刑法

A Class of Integrable Riccati Equations

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A Class of Integrable Riccati Equations

第十一届全国非线性振动学术会议暨第八届全国非线性动力学和运动稳定性学术会议

作者： Yanxia Hu (school of Mathematics and Physics,North china Electric Power university,beijing,102206)

Nonlinear Schr¨odinger equation is one of important equations for nonlinear optics. Based on KAM theory,the complexity of the wave propagations of a class of Nonlinear Schr¨odinger equation with weak periodic external field is *** main result that the wave propag(?)tions of the equation are quasi-periodic in the y-direction is obtained.

关键词： Hamilton-Jacobi theorem Riccati equation Lie group

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轮式移动机器人沙地行驶控制建模与仿真研究

系统仿真学报 2008年第18期20卷 5035-5039页

作者：谷侃锋赵明扬中国科学院沈阳自动化研究所沈阳现代装备研究设计中心

结合车轮沙土相互作用的力学分析,研究解决轮式移动机器人沙地行驶车轮过度滑转下陷问题。考虑纵列式重复通过车轮沙土力学参数的修正,建立六轮式沙地移动机器人的动力学模型,以车轮滑转率为状态变量,设计了移动机器人沙地行驶的滑模驱... 详细信息

结合车轮沙土相互作用的力学分析,研究解决轮式移动机器人沙地行驶车轮过度滑转下陷问题。考虑纵列式重复通过车轮沙土力学参数的修正,建立六轮式沙地移动机器人的动力学模型,以车轮滑转率为状态变量,设计了移动机器人沙地行驶的滑模驱动控制器跟踪车轮期望滑转率。MATLAB/Simulink仿真结果表明,采用该控制器可以较快地跟踪期望滑转率,有效地限制机器人车轮的滑转,避免车轮的过度下陷。

关键词：移动机器人车轮下陷滑转率沙地滑模控制 Simulink仿真

A Proof of the Discrete-Time KYP Lemma Using Semidefinite Programming Duality

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A Proof of the Discrete-Time KYP Lemma Using Semidefinite Pr...

第二十六届中国控制会议

作者： Cheng Yiping school of Electronic and Information Engineering beijing Jiaotong university,beijing 100044,P.R.china

Balakrishnan and Vandenberghe have given an elegant proof of the KYP lemma based on their theorems of alternatives in semidefinite *** also on these theorems,this paper gives a proof of a generalized version of the discrete-time KYP *** addition,we point out that in the nonstrict case of Balakrishnan and Vandenberghe’s （continuous-time） KYP formulation the hypothesis that M22 be positive semidefinite can be dropped.

关键词： Discrete-time KYP lemma Linear matrix inequalities Semidefinite programming Control education