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On the new results of global attractive set and positive invariant set of the Lorenz chaotic system and the applications to chaos control and synchronization

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Science in China(Series F) 2005年第3期48卷 304-321页

作者： LIAO Xiaoxin 1, 2. 3 , FU Yuli 4.& XIE Shengli 4.1. {2. of Control Science & Control Engineering, Huazhong university of Science & Technology, Wuhan 4.0074. China 2. School of Automation, Wuhan university of Science & Technology, Wuhan 4.0070, China 3. School of Information, Central South university of Economy, Politics and Law, Wuhan 4.0064. China 4. School of Electronics & Information Engineering, South China university of Technology, Guangzhou 51064., China Correspondence should be addressed to Liao Xiaoxin (email: xiaoxin_liao@***) 1. department of Control Science & Control Engineering Huazhong University of Science & Technology 430074 Wuhan China 2. School of Automation Wuhan University of Science & Technology 430070 Wuhan China 3. School of Information Central South University of Economy Politics and Law 430064 Wuhan China 4. School of Electronics & Information Engineering South China University of Technology 510640 Guangzhou China

Constructing a family of generalized Lyapunov functions, a new method is proposed to obtain new global attractive set and positive invariant set of the Lorenz chaotic system. The method we proposed greatly simplifies the complex proofs of the two famous estimations presented by the Russian scholar Leonov. Our uniform formula can derive a series of the new estimations. Employing the idea of intersection in set theory, we extract a new Leonov formula-like estimation from the family of the estimations. With our method and the new estimation, one can confirm that there are no equilibrium, periodic solutions, almost periodic motions, wandering motions or other chaotic attractors outside the global attractive set. The Lorenz butterfly-like singular attractors are located in the global attractive set only. This result is applied to the chaos control and chaos synchronization. Some feedback control laws are obtained to guarantee that all the trajectories of the Lorenz systems track a periodic solution, or globally stabilize an unstable (or locally stable but not globally asymptotically stable) equilibrium. Further, some new global exponential chaos synchronization results are presented. Our new method and the new results are expected to be applied in real secure communication systems.

关键词： Lorenz chaotic system global attractive set positive invariant set globally exponential tracking globally exponential synchronization.

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LOD score exclusion analyses for candidate disease susceptibility genes using case-parents design

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Progress in Natural Science:Materials International 2006年第1期16卷 30-38页

作者： DENG Hongwen1,2.3 and GAO Guimin2.4.(1.Laboratory of Molecular and Statistical Genetics, College of Life Sciences, Hunan Normal university, Changsha 4.0081, China 2.Osteoporosis Research Center, Creighton university Medical Center, Omaha NE 68131, USA 3. {2. of Biomedical Sciences, Creighton university, Omaha NE 68131, USA 4. Virginia Bioin format ics Institute and {2. of Statistics, Virginia Polytechnic Institute and State university, Blacksburg VA 2.0}61-0315, USA) [a]Laboratory of Molecular and Statistical Genetics College of Life Sciences Human National University Changsha China [b]Osteoporosis Research Center Creighton University Medical Center Omaha NE USA [c]department of Biomedical Sciences Creighton University Omaha NE USA [d]Virginia Bioinformatics Institute and department of Statistics Virginia Polytechnic Institute and State University Blacksburg VA USA

The focus of almost all the association studies of candidate genes is to test for their importance. We recently developed a LOD score approach that can be used to test against the importance of candidate genes for complex diseases and quantitative traits in random samples. As a complementary method to regular association analyses, our LOD score approach is powerful but still affected by the population admixture, though it is more conservative. To control the confounding effect of population heterogeneity, we develop here a LOD score exclusion analysis using case-parents design, the basic design of the transmission disequilibrium test (TDT) approach that is immune to population admixture. In the analysis, specific genetic effects and inheritance models at candidate genes can be analyzed and if a LOD score is ≤ - 2. 0, the locus can be excluded from having an effect larger than that specified. Simulations show that this approach has reasonable power to exclude a candidate gene having small genetic effects if it is not a disease susceptibility locus (DSL) with sample size often employed in TDT studies. Similar to association analyses with the TDT in nuclear families, our exclusion analyses are generally not affected by population admixture. The exclusion analyses may be implemented to rule out candidate genes with no or minor genetic effects as supplemental analyses for the TDT. The utility of the approach is illustrated with an application to test the importance of vitamin D receptor (VDR) gene underlying the differential risk to osteoporosis.

关键词： association studies candidate genes case-parents design disease susceptibility locus exclusion mapping LOD score.

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Science China Earth Sciences 2004年第10期47卷 886-895页

作者： TANG Liangjie1,2. JIA Chengzao3, PI Xuejun4. CHEN Suping1,2. WANG Zhiyu5, XIE Huiwen4.1. Key Laboratory for Hydrocarbon Accumulation of Education Ministry, Beijing 102.4., China 2. Basin & Reservoir Research Center, university of Petroleum, Beijing 102.4., China 3. PetroChina Company Limited, Beijing 100011, China 4. Tarim Oilfield Company, PetroChina Company Ltd., Kurle 84.000, China 5. department of Geology, university of Petroleum, Beijing 102.4., China 1. Key Laboratory for Hydrocarbon Accumulation of Education Ministry 102249 Beijing China 2. Basin & Reservoir Research Center University of Petroleum 102249 Beijing China 3. PetroChina Company Limited 100011 Beijing China 4. Tarim Oilfield Company PetroChina Company Ltd. 841000 Kurle China 5. department of Geology University of Petroleum 102249 Beijing China

The salt beds of Lower Tertiary developed in the mid-segment of Kuqa foreland fold belt, northern Tarim basin. They considerably controlled structural deformation of the belt. Ac- cording to the field observation, seismic profile interpretation and drilling data, three different structural styles of supra-salt, intra-salt and sub-salt occurred in the Kuqa foreland fold belt. Su- pra-salt structural styles mainly include thrust faults and fault-related sags. Intra-slat structural styles essentially are salt-pillows, intra-salt faults and folds, and salt weld structures. Sub-salt structural styles mainly consist of imbricated thrust faults, duplex structures, pop-up and fault-related folds. It is indicated that great differences exist among supra-salt, intra-salt and sub-salt structures of Kuqa foreland fold belt. The salt-related structures were formed in the same structural stress field. The dynamic mechanism of the salt-related structures is mainly associated with gravitation, compression and plastic flow of salt beds.

关键词： salt-related structural style, supra-salt structure, intra-salt structure, sub-salt structure, Kuga foreland fold belt.

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Time Series Correlated Error's Simulation Scheme with the Application to Simulate the Ephemerides Error of CHAMP

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测绘学报 2002年第Z1期31卷 27-30页

作者： SHEN Yun zhong 1 , HSU Hou tse 2.(1. department of surveying and Geo informatics,Tongji {2.,Shanghai 2.0092.China 2. Institute of Geodesy and Geophysics, CAS, Wuhan 4.0077,China) department of surveying and Geo-informatics Tongji University 上海 200092 Wuhan 430077

Computer simulation experiment is very important in the phase of project design, the availability of simulated result highly depends on the scheme of error simulation. Time series observations are normally correlated. This paper first discusses the formula of correlated error propagation, then derives the formula of simulating time series correlated errors. This formula is then used to simulate correlated ephemerides errors of CHAMP, then the ephemerides are used to recover the gravity vector at satellite altitude with finite differential formula. The formulae derived in this paper are verified with the difference between the recovered gravity vectors and the `true values’ which are directly computed with the same gravity model as that generating the ephemerides.

关键词： time series observation simulation of correlated errors CHAMP ephemerides

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Effect of Substrate-Water Interaction on the Wetting Behavior in Water-Oil and Substrate-Water-Oil Systems

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Wuhan university Journal of Natural Sciences 2003年第4A期8卷 1097-1102页

作者： Yuan Yin-quan 1,2., Zou Xian-wu 1 , Jin Zhun-zhi 1 1. School of Physics and Technology, Wuhan university, Wuhan 4.0072. Hubei, China 2. {2. of Physics, Xiaogan university, Xiaogan 4.2.00, Hubei, China Wuhan university School of Physics and Technology Wuhan Hubei China (GRID:grid.49470.3e) (ISNI:***) Xiaogan university Department of Physics Xiaogan Hubei China (GRID:grid.49470.3e) Wuhan university School of Physics and Technology Wuhan Hubei China (GRID:grid.49470.3e) (ISNI:***)

The effects of the substrate-water interaction on the wetting behavior in water-oil and surfactant-water-oil systems confined by one substrate which has the preferential interaction to one species of particles have been investigated by using the free energy analysis and discontinuous molecular dynamic simulations. As the preferential interaction between the substrate and water particles varies from small repulsion to large attraction, the partial drying, partial wetting and complete wetting state are observed in sequence. In addition, the wetting behavior of surfactant aqueous solution on the substrate is not only dependent on the interaction, but also limited by the maximum equilibrium concentration of surfactants at the interface.

关键词： wetting behavior wetting transition preferential interaction substrate

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Minocycline inhibits 5-lipoxygenase activation and brain inflammation after focal cerebral ischemia in rats

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Acta Pharmacologica Sinica 2007年第6期28卷 763-772页

作者： Li-sheng CHU~(2.3),San-hua FANG~2.Yu ZHOU~2.Guo-liang YU~2.Meng-ling WANG~2.Wei-ping ZHANG~2.Er-qing WEI~(2.4.~2.department of Pharmacology,School of Medicine,Zhejiang {2.,Hangzhou 310058,China ~3 department of Physiology ZhejiangChinese Medical {2. Hangzhou 310053,China department of Pharmacology School of Medicine Zhejiang University Hangzhou 310058 China

Aim:To determine whether the anti-inflammatory effect of minocycline on postis-chemic brain injury is mediated by the inhibition of 5-lipoxygenase （5-LOX）expression and enzymatic activation in ***:Focal cerebral ischemiawas induced for 30 min with middle cerebral artery occlusion,followed *** ischemic injuries,endogenous IgG exudation,the accumulationof neutrophils and macrophage/microglia,and 5-LOX mRNA expression weredetermined 72.h after reperfusion.5-LOX metabolites （leukotriene B4.nd cysteinylleukotrienes） were measured 3 h after ***:Minocycline （2..5and 4. mg/kg,ip,for 3 d） attenuated ischemic injuries,IgG exudation,and theaccumulation of neutrophils and macrophage/microglia 72.h after *** inhibited 5-LOX expression 72.h after reperfusion and the production ofleukotrienes 3 h after reperfusion,Conclusion:Minocycline inhibited postis-chemic brain inflammation,which might be partly mediated by the inhibition of5-LOX expression and enzymatic activation.

关键词： minocycline 5-1ipoxygenase leukotriene focal cerebral ischemia inflammation

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Photo geologic logging methods

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中国有色金属学会会刊：英文版 2005年第S1期15卷 250-253页

作者： ZHANG You-jing, LI Hao, GAO Yun-xiao (department of surveying and {2., Hohai university, Nanjing 2.0098, China) Hohai Univ Dept Surveying & Mapping Nanjing 210098 Peoples R China

Aiming at the shortage of hydroelectric engineering geological logging methods on high side slope and big gallery, the photographic methods based on digital camera were studied. By integrating the application of technology of close range photogrammetry, digital image processing and GIS, the photographic geological logging information system was developed. The system has the functions of digital photography, orthophotoquad making, image mosaicking, logging factors extracting and measuring, CAD mapping, etc. The methods achieve more efficient and higher precision than the regular, and it provides a new way for the hydroelectric engineering geologic logging.

关键词： photo geologic logging digital camera close-range photogrammetry GIS

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Anticoagulation property and security of artificial heart valve material

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Science China(Technological Sciences) 2005年第2期48卷 145-162页

作者： WANG Xianghui1, , LIU Xianghuai1,2., 3, ZHANG Feng2. LI Changrong2. YU Liujiang2. ZHENG Zhihong2. WANG Xi2. JIANG Zhenbin4. CHEN Anqing4.& XU Jingfang3 1. {2. of Physics, East China Normal university, Shanghai 2.0062. China 2. Ion Beam Lab, Shanghai Institute of Mini-system and information, Chinese Academy of Sciences,Shanghai 2.0050, China 3. {2. of Electronics, School of Information Science and Technology, East China Normal Univer- sity, Shanghai 2.0062. China 4. Shanghai Cardiovascular Institute, Zhongshan Hospital, Shanghai 2.0032. China 1. department of Physics East China Normal University 200062 Shanghai China 2. Ion Beam Lab Shanghai Institute of Mini-system and information Chinese Academy of Sciences 200050 Shanghai China 3. department of Electronics School of Information Science and Technology East China Normal University 200062 Shanghai China 4. Shanghai Cardiovascular Institute Zhongshan Hospital 200032 Shanghai China

Heart valve diseases threaten human health. One reliable way to save lives of such patients is to replace the pathologically changed heart valves by artificial ones. Over 2.million patients have received LTI-carbon heart valve’s implantation. However, the thrombosis after the implantation is one of the difficulties that need to be solved. In order to improve the blood compatibility and security of mechanical heart valves, ion beam technology was used to modify the surface properties of the materials. The investigation results have been summarized in this paper.

关键词： artificial heart valve, ion implantation, plasma immersed ion implantation, ion beam enhanced deposition.

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Large second-order optical nonlinearities of s-triazine derivatives: View from micro molecules to macro crystals

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Science China Chemistry 2005年第3期48卷 203-209页

作者： FANG Qi1, LEI Hong2. CUI Yuezhi3, HUANG Zhenli4. XUE Gang1 & YU Wentao1 1. State Key Laboratory of Crystal Materials, Shandong university, Jinan 2.0100, China 2. School of Information Science and Engineering, Shandong university, Jinan 2.0100, China 3. {2. of Chemical Engineering, Light Industry College of Shandong, Jinan 2.0100, China 4. Key Laboratory of Biomedical Photonics, Ministry of Education, Huazhong university of Science and Technology, Wuhan 4.0074. China 1. State Key Laboratory of Crystal Materials Shandong University 250100 Jinan China 2. School of Information Science and Engineering Shandong University 250100 Jinan China 3. department of Chemical Engineering Light Industry College of Shandong 250100 Jinan China 4. Key Laboratory of Biomedical Photonics Ministry of Education Huazhong University of Science and Technology 430074 Wuhan China

Three s-triazine derivatives have been synthesized and their structures been de-termined. These are Compound I: 2.4.dimethyl-6-(p-N,N-dimethylaminostyryl)-s-triazine (abbre-viated to NMe-1), Compound II: 2.4.dimethyl-6-(p-N,N-diethylaminostyryl)-s-triazine (to NEt-1), and Compound III: 2.methyl-4.6-bis(p-N,N-dimethylaminostyryl)-s-triazine (NMe-2.. NMe-1 and NEt-1 molecules belong to the D-π-A type with a one-dimensional charge-transfer character. NMe-1 crystallizes to centrosymmetric P1 space group, while NEt-1 to non-centrosymmetric polar Cc space group with all of the molecular charge-transfer axes taking the same orientation. Under the irradiation of 1064.nm fundamental laser, NEt-1 powder crystals radiate a 2.order harmonic light with an intensity 4..8 times that of urea. The Λ typed NMe-2.molecule, which has a two-dimensional charge-transfer character, crystallizes to polar P2. space group. Its powder crystals exhibit a 2.order harmonic intensity 4..2.times that of urea. The quantum chemical cal-culations and tensor analyses have been carried out to reveal the dependence of the macro 2.order nonlinear optical (NLO) efficiency on the micro 2.order NLO coefficients (β) and on the crystalline packing styles.

关键词： s-triazine derivatives, synthesis, structure, SHG intensities of crystals, βvalues of molecules.

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Diverse Effects of L-arginine on Cardiac Function of Rats Subjected to Myocardial Ischemia and Reperfusion in vivo

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Acta Biochimica et Biophysica Sinica 2007年第3期39卷 201-207页

作者： Xiaoliang WANG~1 Feng LIANG~2.Xiangying JIAOI Lei LIU~1 Xiaojie BAI~1 Meixia LI~1 Jianmin ZHI~3 Huirong LIU~1* 1 department of Physiology,Shanxi Medical university,{2. 030001,China 2.department of Cardiothoracic Surgery,General Hospital of {2. Iron and Steel Company {2. 030003,China 3 department of Physiology.Shanghai Jiaotong university.College of Basic Medicine,Shanghai 2.002.,China department of Physiology Shanxi Medical University Taiyuan 030001 China

In vivo administration of L-arginine at different time points during the course of myocardialischemia and reperfusion（MI/R）has been shown to differentially regulate postischemic *** is one of the most important indexes used to judge the degree of myocardial *** presentstudy attempted to determine whether in vivo administration of L-arginine at different stages of MI/R has adiverse influence on cardiac function of ischemic reperfused hearts and,if so,to investigate the *** adult rats were subjected to 30 min myocardial ischemia followed by 5 h *** L-arginine bolus was given either 10 min before and 50 min after reperfusion（early treatment）or3 h and 4.h after reperfusion（late treatment）.Early treatment with L-arginine markedly increased the leftventricular systolic pressure（LVSP）and dP/dtmax,and decreased myocardial nitrotyrosine *** strictcontrast,late treatment with L-arginine resulted in a significant decrease in LVSP and dP/dtmaxfrom 4.h to 5h after reperfusion,and increase in toxic peroxynitrite formation as measured by *** resultssuggest that the administration of L-arginine at different time points during the course of MI/R leads todiverse effects on cardiac *** supplementation decreased the nitrative stress and improvedleft ventricular ***,late treatment with L-arginine increased the formation of peroxynitriteand aggravated cardiac functional injury.

关键词： myocardial ischemia reperfusion cardiac function nitric oxide peroxynitrite

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