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飞行管理系统实时仿真研究

系统仿真学报 2008年第S2期20卷 333-336页

作者：齐林梁斌程农哈尔滨工业大学深圳研究生院深圳518055 清华大学自动化系导航与控制研究中心北京100084

介绍了一种使用Simulink/RTW(Real-Time Workshop)建模工具和Tornado/VxWorks嵌入式实时操作系统进行飞行管理系统快速原型的方法。首先介绍了飞行管理系统的主要功能以及飞行管理系统的主要工作方式。然后介绍了基于RTW/VxWorks的实时... 详细信息

介绍了一种使用Simulink/RTW(Real-Time Workshop)建模工具和Tornado/VxWorks嵌入式实时操作系统进行飞行管理系统快速原型的方法。首先介绍了飞行管理系统的主要功能以及飞行管理系统的主要工作方式。然后介绍了基于RTW/VxWorks的实时仿真方法,并对实时仿真平台的配置作了详细的说明。最后设计了飞行管理系统实时仿真的框架,并在RTW/VxWorks实时仿真平台上对飞行管理系统部分核心功能进行了实时分布式仿真。

关键词：飞行管理系统实时仿真 RTW VxWorks

STUDIES ON GLYCOSIDES ⅤⅢ.TOTAL SYNTHESIS OF NEW ALKALOID GLYCOSIDES FROM SELAGINELLA DOEDERIENII

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chinese Chemical Letters 1990年第3期1卷 213-214页

作者： Zhan Jiang LI Cheng Fang YU Meng Shen CAI Department of Organic Chemistry School of Pharmaceutical sciences beijing Medical {2.,beijing 100083

Two new alkaloids,hordenine-O- -L-rhamnopyranoside(Ⅰ)and hordenine -0-(6′-trans-cinnamoyl)-4′-O-β-D-glucopyranosyl- -L-rhamnopyranoside(Ⅲ) isolated from Selaginella doederleinii have been synthesized the first time. A new method,in which trifluoroacetoxyl group was used both as a good leaving group and a protecting group for synthesis of O-glycosides with high stereo- selectivity was reported.

关键词： TOTAL SYNTHESIS OF NEW ALKALOID GLYCOSIDES FROM SELAGINELLA DOEDERIENII STUDIES ON GLYCOSIDES

Identification of a unique 312.nucleotides variant of Hop stunt viroid（HSVd） with a tandem 15 nucleotides repeat from plum

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Identification of a unique 312 nucleotides variant of Hop st...

中国植物保护学会2.07年学术年会

作者： Yuanai Yang~(1,2. Hongqing Wang~2.Zujian WU~3 Zhuomin Cheng~1 Shifang Li~(1*) (1 State Key Laboratory for Biology of Plant Diseases and Insect Pests,Institute of Plant Protection,chinese academy of Agricultural {2.,Yuanmingyuan West No.2. beijing 100094,People''s Republic of China 2.Department of Fruit Science, College of Agronomy and Biotechnology,China Agricultural university,beijing, People''s Republic of China.3 Institute of Plant Virology,Fujian Agriculture and Forestry university,Fuzhou 350002.China)

＜正＞Sixty-eight plum samples were collected from 12.different provinces of *** molecular weight RNAs were extracted and used for dot-blot,reverse transcription-polymerase chain reaction （RT-PCR）,return-polyacrylamide gel electrophoresis（R-PAGE）,and biological indexing using cucumber .Results showed that 15 of the 68 plum samples were positive for Hop stunt viroid（HSVd）.Four positive samples were selected for cloning and sequence *** indicated that most HSVd sequences from the plum in china had 1～3 nucleotides changes from the closest HSVd in *** addition,the sample PB2.（cv."Friar"） collected from Hebei province had one sequence with a 15 nt duplication （named HSVd D-15） at the 2.4/2.5 position in the lower central *** biological indexing,cucumber seedlings,an indicator plant for HSVd,were inoculated with RNAs directly extracted from the original plum source（PB 2.,cv."Friar"）.Nucleotide sequencing analysis of the progeny showed that HSVd but not HSVd-D15,was recovered from inoculated *** very unlikely,the possibility that this extra sequence was the result of a PCR artifact cannot be completely ruled out.

关键词： Hop stunt viroid plum recombination sequence repeat

Price leadership strategy or branding strategy:an empirical test of indigenous chinese exporters

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Journal of Southeast university(English Edition) 2008年第S1期24卷 174-179页

作者： Chen Xi1 Hu Zuohao1 Zhao Ping1 Song Hua2.1 School of Economics and Management, Tsinghua university, beijing 100084, China)(2.School of Business, Renmin university of China, beijing 100872.China)

The effects of price leadership strategies and branding strategies on the export performance of indigenous chinese exporters with a focus on developing country markets and developed country markets are examined based on the principles of strategy-environment co-alignment and marketing segmentation theory. Findings suggest that when focusing on developing country markets, the use of a branding strategy is more likely to enhance export performance. When focusing on developed country markets, neither the use of a price leadership strategy nor the use of a branding strategy enhances export performance. Finally, theoretical and managerial implications of the findings are discussed.

关键词： price leadership strategy branding strategy export target markets export performance

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非磁性材料磁电阻效应的研究进展

物理实验 2003年第3期23卷 16-19页

作者：周勋梁冰青唐云俊王荫君贵州师范大学物理与电子科学系贵州贵阳550001 中国科学院物理研究所磁学国家重点实验室北京100080

探讨了非磁性材料与磁性材料磁电阻效应的异同 ,分析了几种有代表性的非磁性材料的巨大磁电阻效应 ,概述了目前非磁材料磁电阻效应的研究和应用状况 .

关键词：非磁性材料磁电阻效应 Bi单晶薄膜

Multistage hydrothermal dolomites in the Middle Devonian(Givetian) carbonates from the Guilin area,South China

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Multistage hydrothermal dolomites in the Middle Devonian(Giv...

中国科学院地质与地球物理研究所2.04学术年会

作者： DAIZHAO CHEN~*,HAIRUO QING+ and CHAO YANG+ * Institute of Geology and Geophysics,chinese academy of {2.,PO Box 982.,beijing 10002.,China + Department of Geology,university of Regina,Regina,SK,Canada S4S 0A2

Pervasive dolomites occur preferentially in the stromatoporoid biostromal(or reefal) facies in the basal Devonian(Givetian) carbonate rocks in the Guilin area, South *** amount of dolomites,however,decreases sharply in the overlying Frasnian carbonate *** are dominated by replacement dolomites with minor dolomite *** dolomites include:(l) fine to medium,planar-e floating dolomite rhombs(Rd1);(2. medium to coarse, planar-s patchy/mosaic dolomites(Rd2.;and(3) medium to very coarse non-planar anhedral mosaic dolomites(Rd3).They post-date early submarine cements and overlap with *** types of dolomite cements were identified:planar coarse euhedral dolomite cements(Cd1) and non-planar (saddle) dolomite cements(Cd2.;they post-date replacement dolomites and predate late-stage calcite cements that line mouldic vugs and *** replacement dolomites haveδO values from -13.7 to -9.7‰VPDB,δC values from -2.7 to + l.5‰VPDB and Sr/Sr ratios from 0.7082.to *** inclusion data of Rd3 dolomites yield homogenization temperatures(T) of 136- 149℃and salinities of 7.2.11.2.wt%NaCl *** data suggest that the replacive dolomitization could have occurred from slightly modified sea water and/or saline basinal fluids at relatively high temperatures,probably related to hydrothermal activities during the latest Givetian-middle Fammenian and Early Carboniferous *** with replacement dolomites,Cd2.cements yield lowerδO values(-14.2.to -9.3‰VPDB),lowerδC values(-3.0 to -0.7‰VPDB),higher Sr/Sr ratios(≈0.7100) and higher T values(171- 2.9℃),which correspond to trapping temperatures(T) between 2.0 and 300℃after pressure *** data suggest that the dolomite cements precipitated from higher temperature hydrothermal fluids,derived from underlying siliciclastic deposits,and were associated with more intense hydrothermal events during Permian-Early Triassic time,when the host dolostones were deeply *** pe

关键词： China Devonian diagenesis dolomitization hydrothermal fluids

LYAPUNOV FUNCTIONAL FAMILIES FOR GENERAL LURIE DISCRETE SYSTEM

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LYAPUNOV FUNCTIONAL FAMILIES FOR GENERAL LURIE DISCRETE SYST...

第二十届中国控制会议

作者： Zuoxin Gan Jingqing Han Peiguang Wang Institute of Systems Science, chinese academy of {2., beijing, 100080 College of Electronics and Informational Engineering of Hebei university, Baoding, 071002

＜正＞Abstract: The problem of Lyapunov like necessary and sufficient conditions is investigated and solved for the most general class of Lurie-Postnikov stationary discrete-time systems with multiple Lurie type nonlinearities. The general result is used to proved necessary and sufficient both algebraic and frequency domain criteria for given functional families to be Lyapunov functional families for all admissible nonlinearities. The example is aimed to illustrate the applications of the new results of the paper, which show that the results of this paper is more general than previous results of Grujic.

关键词： absolute stability discrete system Lyapunov functional family.

Comment on"Mudflat/distal fan and shallow lake sedimentation (upper Vallesian-Turolian) in the Tianshui Basin,Central China:Evidence against the late Miocene eolian loess"by ***-Zarza,***,***,***,***,***-Perez,***-Garcia,X.X

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Comment on"Mudflat/distal fan and shallow lake sedimentation...

中国科学院地质与地球物理研究所第十届(2.10年度)学术年会

作者： Z.T.Guo~(a,*),J.Y Ge~a,G.Q,Xiao~(b,c),Q.Z.Hao~a,H.B.Wu~a,T.Zhan~a,L Liu~a,L Qin~a,F.M.Zeng~a,B.Y.Yuan~a a Institute of Geology and Geophysics,chinese academy of {2.,P.O.Box 982.,beijing 10002.,China b Institute of Earth Environment,chinese academy of {2.,Xian 710075,China c graduate School of the chinese academy of Science,beijing 100039,China

Alonso-Zarza et al.(2.09)argued that the Miocene sedimentary sequence near Qinan(QA-I)(Guo et al., 2.02.,north to Tianshui in Central China,represents mudflat/distal fan and shallow lake *** we show that they(1)did not take into account extensive observational evidence supporting an eolian origin;(2.erroneously correlated deposits of different origins and small lateral extent occurring in different geomorphic units;(3)inferred a common origin for distal fans in the Tianshui and Qinan regions despite contrasting tectonic and geomorphic conditions;and(4)in some cases misinterpreted features typical of eolian ***,their study is not a sufficient basis for challenging earlier interpretations of Asian paleoclimates.

关键词： Miocene and Pliocene eolian deposits Fan and distal fan sediments Asian drying

Plastic changes in the primary somatosensory cortex produced by persistent pain experience in rats

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Plastic changes in the primary somatosensory cortex produced...

中国神经科学学会第四次会员代表大会暨第八届全国学术会议

作者： Lei YANG~1,Dan-Dan WANG~1,Fa-Le CAO~2.Ying CHANG~1,Yan WANG~2.Dong-Liang YUAN~2.Xue-Feng CHEN~2.Rui-Rui WANG~2.JunCHEN~(1,2.*) 1 Institute for Biomedical sciences of Pain,Capital Medical university,{2. 100069,China 2.Institute for Biomedical sciences of Pain and Institute for Functional Brain Disorders,Tangdu Hospital,Fourth Military Medical university,Xi''an 710038,China

＜正＞Objective In spite of overwhelming evidence derived from human and animal studies showing active involvement of primary somatosensory cortex（S1） in subserving the somatosensory-discriminative aspects of pain,it remains unclear whether persistent pain could produce neuronal and synaptic plasticity in this *** the present study,we sought to determine,at various levels,possible plastic changes in neuronal activities,protein expression（activation） and synaptic connection and transmission in S1 area of rats subjecting to peripheral persistent *** and Results First,our immunohistochemical experiments demonstrated that subcutaneous bee venom injection,a wellestablished animal model of persistent inflammatory pain,could evoke increased populational neuronal activities in the S1 region with predominant localization in layersⅡ-Ⅲ.Subsequently,we used Western blot technique to unravel regionrelated differential activation of mitogen-activated protein kinase subfamily members in spinal cord and S1 area in re- sponse to peripheral persistent pain *** the microscopic synaptic unit level,our whole cell patch clamp recording results showed that persistent painful stimulation in the periphery exerted a significant impact on the intrinsic synaptic activities of cortical neurons,while at the macroscopic synaptic circuit level,combination of multi-electrode array recording with current source density imaging revealed pain-elicited,layer-dependent spatial and temporal plasticity of synaptic connection,transmission and function within the S1 ***,our ongoing work using somatosensoryevoked potentials in vivo has shown nociception specific,long-term potentiation-like phenomenon following bee venominduced peripheral inflammatory *** The present results add a new line of evidence showing multiple levels of plastic changes in the S1 area in response to peripheral persistent nociception.

关键词： persistent pain primary somatosensory cortex plasticity