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Stability Analysis of Two-Dimensional Switched Systems with Unstable Subsystems

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Stability Analysis of Two-Dimensional Switched Systems with ...

第三十届中国控制会议

作者： ZHU Liying~1,FENG Gang~2 1.College of mathematics,Physics and Information Engineering,Zhejiang normal university,Jinhua 321004,P.R.China 2.Department of Manufacturing Engineering and Engineering Management,City university of Hong Kong,Hong Kong

＜正＞This paper investigates the stability of switched two-dimensional linear systems with unstable *** on continuous positive definite functions depending only on the entries of the coefficient matrixes of subsystems,for the case that the origin is a single unstable spiral point of all subsystems,we propose sufficient conditions of stability/instability of the kind of switched *** on an illustrative example and numerical simulations demonstrates the correctness and effectiveness of the new stability/instability results obtained in this paper.

关键词： Switched Systems Switching Lines Switching Path Stability Instability

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凸体的曲率映象与仿射表面积

数学学报（中文版） 2002年第4期45卷 797-802页

作者：冷岗松湖南师范大学数学系

本文研究了一些特殊凸体与其极体的曲率仿射表面积乘积的下界.对任意两个凸体,建立了它们的投影体的混合体积与其仿射表面积的一个不等式（见文[1-15]）.

关键词：凸体曲率映象仿射表面积混合体积不等式

Electronic Properties and Stability of Methoxy-Substituted Lindqvist Polyoxometalates [Nb2W4O19CH3]3- by DFT

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Electronic Properties and Stability of Methoxy-Substituted L...

中国化学会第四届全国多酸化学学术研讨会

作者： Sha Cong,Likai Yan,Ping Song,Wei Guan,Zhongmin Su~* Institute of Functional Material Chemistry,Department of Chemistry,northeast normal university, Changchun Jilin 130024,

The electronic properties and stability of five[NbWOOCH] isomers(isomers B to F) have been investigated by density functional theory(DFT) *** results show that the relative stability of isomers in acetonitrile is B>F>D>C>***-electron reduction of the stability of isomers order is F > B > D > C> *** with[NbWO,9],the bond length of M-O(M = Nb,W),which metal atoms

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Detecting Important Nodes to Community Structure

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Detecting Important Nodes to Community Structure

第七届全国网络科学论坛

作者： Ying Fan Beijing normal university

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Relationship between platelet P-selectin and severity of acute coronary syndromes

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Journal of Geriatric Cardiology 2008年第3期5卷 146-149页

作者： Rui Wang~1 Jiyuan Lu~1 Yongping Jia~1 Yuping Gao~1 Chunyu Fan~1 Fang Li~2 1 Department of Cardiology, The First Hospital of Shanxi Medical university. 2 Department of Biochemisry and Molecular Biology, Shanxi Medical university. Taiyuan, Shanxi 030001, China Department of Cardiology The First Hospital of Shanxi Medical University Department of Biochemisry and Molecular Biology Shanxi Medical University

Objective Recent studies reveal important roles ofplatelet P-selectin on progression of *** the present study, we examine the relation between platelet P-selectin expression and severity of acute coronary *** One hundred and eighty-four consecutive patients with proven or clinically suspected acute coronary syndromes (ACS) were enrolled in the study. Level of P-selectin expression was determined by flow *** P-selectin level was expressed as the percentage of P- selectin positive *** The level of P-selectin was higher in patients with a single diseased coronary artery or multiple diseased arteries compared to those with normal coronary arteries.P-selectin expression was significantly and positively correlated with angiographic Gensini score (r=0.323,P=0.029).Multiple regression analyses showed that the association of the percentage of P- selectin-positive platelets with ACS was independent of other clinical *** Platelet P-selectin is associated with severity of acute coronary syndromes in patients with acute coronary syndromes.

关键词： platelets P-selectin acute coronary syndromes

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初三学生时间管理倾向与前瞻记忆能力的关系

心理科学 2009年第5期32卷 1138-1141,1145页

作者：窦刚翁世华华东师范大学心理与认知科学学院上海200062

选取80名初三年级学生为被试,采用Einstein和McDaniel(1990)的经典研究范式,以瑞文标准推理测验为进行中任务,通过操纵前瞻记忆任务的重要性、延时长短,考察了初三学生时间管理倾向与基于时间的前瞻记忆能力之间的关系。结果发现,初三... 详细信息

选取80名初三年级学生为被试,采用Einstein和McDaniel(1990)的经典研究范式,以瑞文标准推理测验为进行中任务,通过操纵前瞻记忆任务的重要性、延时长短,考察了初三学生时间管理倾向与基于时间的前瞻记忆能力之间的关系。结果发现,初三学生时间管理倾向与基于时间的前瞻记忆成绩之间的相关显著,时间监控观对前瞻记忆成绩有一定的预测作用;高分组被试的时间监控效率显著高于低分组被试;时间管理倾向与智力水平相关显著。

关键词：时间管理倾向基于时间的前瞻记忆初中生

Wrinkled petals and stamens 1,is required for the morphogenesis of petals and stamens in Lotus japonicus

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Cell Research 2006年第5期16卷 499-506页

作者： Jiang Hua Chen~1 Ji Liang Pang~2 Li Lin Wang~2 Yong Hai Luo~1 Xin Li~3 Xiang Ling Cao~1 Kui Lin~3 Wei Ma~3 Xiao He Hu~1 Da Luo~(1,3) ~1National Laboratory of Plant Molecular Genetics,Institute of Plant Physiology and Ecology,Shanghai Institutes for Biological Sciences,and Graduate school of the Chinese Academy of Sciences,Chinese Academy of Sciences,300 Fenglin Road,Shanghai 200032,China ~2school of Life Science,Hangzhou normal College,16 Xuelin Road,Hangzhou 310018,China ~3school of Life Science and Biotechnology,Shanghai Jiao Tong university,1954 Huashan Road,Shanghai 200030,China NationalLaboratoryofPlantMolecularGenetics InstituteofPlantPhysiologyandEcologyShanghaiInstitutesforBiologicalSciencesandGraduateSchooloftheChineseAcademyofSciencesChineseAcademyofSciences300FenglinRoad

Although much progress has been made in understanding how floral organ identity is determined during the floraldevelopment,less is known about how floral organ is elaborated in the late floral developmental *** we de-scribe a novel floral mutant,wrinkledt petals and stamensl (wps1),which shows defects in the development of petalsand *** analysis indicates that wps1 mutant is corresponding to a single recessive locus at the long arm ofchromosome *** early development of floral organs in wps1 mutant is similar to that in wild type,and the malfunctionof the mutant commences in late developmental stages,displaying a defect on the appearance of petals and *** mature flower,petals and stamen filaments in the mutant are wrinkled or folded,and the cellular morphology underL1 layer of petals and stamen filaments is *** is found that the expression patterns of floral organ identity genesare not affected in wps1 mutants compared with that of wild type,consistent with the unaltered development of allfloral ***,the identities of epidermal cells in different type of petals are *** histologicalanalysis shows that in wps1 flowers all petals are irregularly folded,and there are knotted structures in the petals,whilethe shape and arrangement of inner cells are malformed and *** on these results,we propose that Wps1acts downstream to the class B floral organ identity genes,and functions to modulate the cellular differentiation duringthe late flower developmental stages.

关键词： Lotus japonicus wps1 mutant ABC model floral organ differentiation

E空间教师的自主发展特点研究——以现象学分析方法为视角

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外国教育研究 2007年第5期34卷 19-22页

作者：查英金美福天津师范大学教育科学学院天津300193

胡塞尔的现象学是一门关于认识论和一般体验的学说,而现象学分析是一种进行意向分析、意识活动分析的方法。运用这种方法对所选取的E空间文本,即教师们在网络上所写的随笔及其电子出版物进行分析可以发现,在E空间,教师们是通过网络写作... 详细信息

胡塞尔的现象学是一门关于认识论和一般体验的学说,而现象学分析是一种进行意向分析、意识活动分析的方法。运用这种方法对所选取的E空间文本,即教师们在网络上所写的随笔及其电子出版物进行分析可以发现,在E空间,教师们是通过网络写作和交流来实现自我发展的,这种发展是一种自主发展,主要体现在教师认识水平的提高和意识活动的变化上。

关键词： E空间教师 E空间文本教师自主发展现象学分析

Genetic models of structural traps related to normal faults in the Putaohua Oilfield,Songliao Basin

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Petroleum Science 2008年第4期5卷 302-307页

作者： Sun Simin Wu Xinsong Liu Hongtao Wang Changsheng school of Resources and Information Technology China University of Petroleum Beijing 102249 China Oil Recovery Plant No.7 Daqing Oilfield Company PetroChina Daqing Heilongjiang 163517 China

The Putaohua Oilfield is a fault-prolific area and the faults have close relation with structural traps. The genetic models of the structural traps in the Putaohua Oilfield can be divided into two types： individual fault model and multi-fault interaction model. This is based on the description of displacement distribution of typical individual normal faults, the geometry of the footwall and hanging wall, and the analysis of the interaction between faults and the corresponding change in geometry when the faults grow. The individual fault model is that the displacement reaches a maximum at or near the center of fault and decreases toward the fault tips, so a half-graben is formed on the hanging wall of the fault and a half- anticline is formed on the footwall because of the isostatic process. The multi-fault interaction model is that during the growth of faults, they overlap and interact with each other, and accommodation zones are formed in the overlapping segments. The accommodation zones are favorable targets for hydrocarbon exploration, and the trap characteristics are dependent The multi-fault interaction model can be subdivided on the extent of overlap and occurrence of faults. into three types： synthetic accommodation zone, convergent accommodation zone and divergent accommodation zone. Hydrocarbon migration and accumulation models of each type have been developed. The hydrocarbon migration and accumulation models of the traps with different genetic models have their own characteristics in the different stages of fault growth.

关键词： Songliao Basin Putaohua Oilfield accommodation zone normal fault growth structural trap