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chinese Journal of Aeronautics 1997年第1期10卷 58-61页

作者： Zhang Xiaomei Wang Zhanlin(Faculty 303, beijing university of Aeronautics andAstronautics, beijing, 100083, china) Faculty 303 Beijing Univ. Aero. and Astronaut. Beijing 100083 China

A valid preview control technique is presented for processing servo systemswith input delay based on extended error systems with input delay. The technique usesthe concept of error systems, establishes extended error systems with input delay and de-rives preview control laws based on minimization of evaluation function. Finally, simula-tion is done on linear direct current motor without brush. The results reveal that the tech-nique proposed herein is valid for improving performance of servo systems.

关键词： error system preview control servo system

An implicit relation between temperature and reaction rate in the SLFM

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Theoretical & Applied Mechanics Letters 2011年第1期1卷 47-49页

作者： Jian Zhang,~(a)) Guowei He,~(b)) and Guodong Jin LNM,Institute of Mechanics,chinese academy of sciences,beijing 100190,china LNM Institute of Mechanics Chinese Academy of Sciences Beijing 100190 China

The Arrhenius law implies that reaction rate is a continuous function of temperature. However,the steady laminar flamelet model(SLFM) does not explicitly give this functional relationship. The present study addresses this relation in the *** is found that reaction rate is not continuous in the mixture-fraction *** a result,the SLFM is unable to predict local extinction and ***,we use the unstable branch of the'S-curve'to fill the gap between steady burning branch and extinction one,and find that this modification leads to a continuous dependent of reaction rate on *** the modified SLFM can describe the local extinction and reignition.

关键词： nonpremixed turbulent combustion local extinction and reignition steady laminar flamelet model unstable branch

THE FORMATION OF 1,2－BISDIPYRRINONE－ETHYLENES

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chinese Chemical Letters 1994年第12期5卷 1017-1020页

作者： Jin Shi MA Qing Qi CHEN Chang Qi WANG Ling Jiang CHENG and Sheng JIN(Institute of Photographic Chemistry, chinese academy of sciences. beijing 100101)(Department of Chemistry, Peking university. beijing100871)

A new type of bile pigments. 1, 2-bisdipyrrinone-ethylenes(1).were obtained with promising yields (25, 28, 28.5%, for the respective samples) by bromine oxidation of dipyrrinones (2) in methylene chloride.

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Development and Application of EST-derived Molecular Markers Specific to Chromosome Arms of Rye(Secale cereale L.)

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Development and Application of EST-derived Molecular Markers...

ALLELOPATHIC POTENTIAL OF BARNYARD GRASS ON RICE AND SOIL MICROBES IN PADDY

2009整合植物生物学研讨会

作者： Hongxing Xu~(1*),Dongdong Yin~(1*),Lihui Li~(2**),Qiuxia Wang~2,Xiuquan Li~2,Weihua Liu~2, Xinming Yang~2 and Diaoguo An~(1**) 1 Center for Agricultural Resources Research,Institute of Genetics and Developmental Biology,chinese academy of sciences,Shijiazhuang 050021,china 2 Institute of Crop Science,chinese academy of Agricultural sciences,beijing 100081,china.

Rye(Secale cereale L.)genome carries abundant advantageous genes for wheat genetic *** to cytogenetic characterization,chromosome specific markers are more convenient and quick methods to identify the transfer of rye chromosome to common wheat(Triticum aestivum L.).Recently,more and more expressed sequence tag(EST)

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ALLELOPATHIC POTENTIAL OF BARNYARD GRASS ON RICE AND SOIL MI...

中国第三届植物化感作用学术研讨会、第八届全国杂草科学大会、联合国粮农组织——中国“水稻化感作用论坛”

作者： Y.GU~(1,2),H.B.LI~(1,2) and C.H.KONG~(1*) 1 Institute of Applied Ecology,chinese academy of sciences,Shenyang 110016,china,2 Graduate School,chinese academy of sciences,beijing 100039,china

Allelopathic potentials of barnyard grass(Echinochloa crus-galli) on rice(Oryza sativa) and soil microbes in paddy were *** a result,rice growth was inhibited in the barnyard grass infested soil in which the growth of non-allelopathic rice variety Liaojing-9 was considerably reduced compared to that of allelopathic rice variety *** experiments showed the germination and growth of rice were suppressed by barnyard grass

关键词： GRASS ALLELOPATHIC POTENTIAL OF BARNYARD GRASS ON RICE AND SOIL MICROBES IN PADDY

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分子疫苗防治老年性痴呆小鼠模型的研究进展

生物化学与生物物理进展 2001年第6期28卷 781-782页

作者：张薇华茜张岱赫荣乔北京大学第六医院北京100083 中国科学院生物物理研究所视觉信息加工开放实验室北京100101

老年斑是老年性痴呆 (Alzheimer sdisease ,AD)的特征性病理改变 ,β 淀粉样 (β amyloid ,Aβ)是其主要成分 .将Aβ作为疫苗对动物进行免疫 ,有明显抑制转基因小鼠脑内Aβ的沉积 ,清除原有斑块的作用 ,从而减少异常Aβ沉积对认知功能... 详细信息

老年斑是老年性痴呆 (Alzheimer sdisease ,AD)的特征性病理改变 ,β 淀粉样 (β amyloid ,Aβ)是其主要成分 .将Aβ作为疫苗对动物进行免疫 ,有明显抑制转基因小鼠脑内Aβ的沉积 ,清除原有斑块的作用 ,从而减少异常Aβ沉积对认知功能的损害 .疫苗没有引起针对动物自身抗原的免疫反应。

关键词： β-淀粉样老年性痴呆星形胶质细胞聚集分子疫苗防治小鼠模型

Mobility of heavy metals from tailings to stream waters in local zinc smelting activities contaminated site

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Acta Geochimica 2006年第S1期 41-42页

作者： Taoze LIU1,2 , Yuangen YANG1, Bangyu LIU1,2 , Xiangyang BI1,2 , Feili LI1,2 1 State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, chinese academy of sciences, Guiyang 550002, china 2 Graduate School of the chinese academy of sciences, beijing 100039, china

SYNTHESIS AND BIOTECHNOLOGICAL APPLICATIONS OF VINYL POLYMERINORGANIC HYBRID AND MESOPOROUS MATERIALS

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chinese Journal of Polymer Science 2000年第1期18卷 1-7页

作者： Yen Wei Kun-yuan Qiu Department of Chemistry, Drexel university, Philadelphia, Pennsylvania 19104, USA Department of Polymer Science and Engineering, Peking university, beijing 100871, china Drexel Univ Dept Chem Philadelphia PA 19104 USA Peking Univ Dept Polymer Sci & Engn Beijing 100871 Peoples R China

We describe the sol-gel synthesis of a new family of organic-inorganic hybrid materials, in which various vinyl polymers are covalently bonded to and uniformly distributed in inorganic oxide matrices. The materials can be tailored to have both good toughness and hardness while maintaining excellent optical transparency. Doping the sol-gel metal oxides with optically active compounds such as D-glucose results in new optical rotatory composite materials. Removal of the dopant compounds from the composites affords mesoporous oxide materials; which represents a new, nonsurfactant-templated route to mesoporous molecular sieves. We have successfully immobilized a series of enzymes and other bioactive agents in mesoporous materials. Catalytical activities of the enzyme encapsulated in mesoporous materials were found to be much higher than those encapsulated in microporous materials.

关键词： vinyl polymer-inorganic hybrid materials mesoporous materials sol-gel process biotech-nological applications

Lithospheric Geothermal Structure in Yunnan, china

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Earthquake Research in china 1998年第1期12卷 13-25页

作者： Zhou Zhenheng,Xiang Caiying, and Deng WanmingSeismological Bureau of Yunnan Province,Kunming 650041,china Institute of Geology,chinese academy of sciences,beijing 100029,china

In this paper,the characteristics of the lateral variations of the deep heat flow and Hthospheric geotemperature distribution in Yunnan have been studied,and the lithospheric geothermal structure has been divided into three types,*** geothermal structure in the typical modern tectonically active region,transitional geological region and stable geological ***,the relationship between the geotherm and seismicitv has been discussed.

关键词： deep heat flow lithospheric geotemperature geothermal structure seismicity Yunnan.