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中国病理生理杂志 2012年第11期 2093-2094页

作者： HE Jin-long1,2.ZOU Ming-hui2.ZHU Yi1(1department of Physiology and Pathophysiology,Peking university Health Sciences Center,Beijing 100191,China 2.ection of Molecular Medicine,department of Medicine,university of Oklahoma Health Sciences Center,Oklahoma city,OK 73104,usa)

AIM:Aberrant activation of thromboxane A2.TXA2.receptor(TPr)is reported to cause vascular inflammation and *** TPr activation instigates vascular inflammation remains poorly *** aim of the present study was to determi... 详细信息

关键词： IKK ROCK B phosphorylation

CONVERGENCE RATES OF MARKOV CHAIN APPROXIMATION METHODS FOR CONTROLLED DIFFUSIONS WITH STOPPING

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Journal of Systems Science & Complexity 2010年第3期23卷 600-621页

作者： Qingshuo SONG Gang George YIN department of Mathematics City University of Hong Kong 83 Tat Chee Avenue Kowloon Tong Hong Kong China department of Mathematics Wayne State University Detroit Michigan 48202 USA

This work is concerned with rates of convergence of numerical methods using Markov chainapproximation for controlled diffusions with stopping (the first exit time from a bounded region).In lieuof considering the associated finite difference schemes for Hamilton-Jacobi-Bellman (HJB) equations,a purely probabilistic approach is *** is an added difficulty due to the boundary condition,which requires the continuity of the first exit time with respect to the discrete *** prove theconvergence of the algorithm by Markov chain approximation method,a tangency problem might arise.A common approach uses certain conditions to avoid the tangency ***,by modifying thevalue function,it is demonstrated that the tangency problem will not arise in the sense of convergencein probability and in L^*** addition,controlled diffusions with a discount factor is also treated.

关键词： Controlled diffusion dynamic programming equation Markov chain approximation rate of convergence.

Association and linkage analysis of COLIA1 and AHSG gene polymorphisms with femoral neck bone geometric parameters in both Caucasian and Chinese nuclear families

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Acta Pharmacologica Sinica 2007年第3期 375-381页

作者： Hui JIANG~(2.3,5) Shu-feng LEI~(2.5) Su-mei XIAO~2.Yuan CHEN~(2.3) Xiao SUN~2.Fang YANG~(2.3) Li-ming LI~2.Shan WU~2.Hong-wen DENG~(2.4,6)2.Laboratory of Molecular and Statistical Genetics and the Key Laboratory of Protein Chemistry and Developmental Biology of the Ministry of Education,College of Life Sciences,Hu-nan Normal university,Changsha 410081,China 3 Osteoporosis Research Center,Creighton university,Omaha 68131,{2. 4 department of Orthopedic Surgery,School of Medicine,university of Missouri-Kansas city,Kansas city 64108,{2.

Aim:To simultaneously investigate the contribution of the alpha 1 chain of col-lagen type 1(COLlAl)and alpha2.HS-glycoprotein(AHSG)genes to the varia-tion of bone geometric parameters in both Caucasians and ***:Sixhundred and five Caucasian individuals from 157 nuclear families and 12.8 Chi-nese subjects from 400 nuclear families were genotyped at the AHSG-Sacl,COLIA1-PCOL2.and Spl polymorphisms using polymerase chain reaction(PCR)-restric-tion fragment length polymorphism(RFLP).5 FN bone geometric parameters werecalculated based on bone mineral density and bone area of femoral neck(FN)measured by dual energy X-ray *** stratification,totalfamily association,within-family association,and linkage tests were performed bythe quantitative transmission disequilibrium test ***:The t-testshowed the significant differences of all bone geometric phenotypes(except ED)between Caucasians and Chinese in the offspring using both unadjusted andadjusted(by age,height,weight,and gender)*** Caucasians,we foundsignificant within-family association results between the COLlAl-Spl polymor-phism(rs1800012.and cross sectional area(CSA),cortical thickness(CT),endocortical diameter(ED),buckling ratio(BR)(P=0.018,0.002.0.02.,and 0.001,respectively);the COLlAl-Spl polymorphism also detected significant linkagewith BR(P=0.039).In the population of China,the within-family associationsbetween the COLlAl-PCOL2.polymorphism(rs1107946)and CT,BR were signifi-cant(P=0.012.and 0.008,respectively).Furthermore,evidence of linkage wereobserved between the AHSG-Sacl polymorphism(rs4918)and CT,BR(P=0.042.nd 0.014,respectively)in Caucasians,but not in ***:Ourresults suggest that the COLlAl gene may have significantly association withbone geometry in both Caucasians and Chinese,and the AHSG gene may belinked to bone geometry in Caucasians,but not in *** study representsour first efforts on investigating the importance of the COLlAl and A

关键词： COLIA1 AHSG bone geometry transmission disequilibrium test

WHAT DOES CHAOS HAVE TO DO WITH SYSTEMS AND CONTROL ENGINEERING?

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Journal of Systems Science & Complexity 2001年第1期14卷 31-39页

作者： CHEN Guanrong (department of Electrical and Computer Engineering, university of Houston, Houston, Texas 772.4, {2. department of Electronic Engineering, city university of Hong Kong, Kowloon, Hong Kong SAR, China) university of Houston 美国 77204

Chaos as a very special type of complex dynamical behaviors has been studied for about four decades. Yet the traditional trend of analyzing and understanding chaos has evolved to controlling and utilizing chaos today. Research in the field of chaos modeling, control, and synchronization includes not only ordering chaos, which means to weaken or completely suppress chaos when it is harmful, but also chaotification, which refers to enhancing existing Chaos or creating chaos purposely when it is useful, by any means of control technology. This article offers a brief overview about the potential impact of controlled chaos on beneficial applications in science and engineering, and introduces some recent progress in chaotification via feedback control methods.

关键词： Chaos chaos control chaotification complexity feedback.

Design and implementation of an optical simulation environment for bioluminescent tomography studies

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Progress in Natural Science:Materials International 2007年第1期17卷 87-94页

作者： LI Hui, TIAN Jie, LUO Jie, LU Yujie, CONG Wenxiang and WANG Ge ( department of Education Technology, Capital Normal university, Beijing 100037, China Key Laboratory of Complex Systems and Intelligence Science, Institute of Automation, Chinese Academy of Sciences, Beijing 100080, China Bioluminescent Tomography Laboratory, department of Radiology & department of Biomedical Engineering, university of Iowa, Iowa city, Iowa 52.42. usa) [a]Departhent of Education Technology Capital Normal University Beijing China [b]Key Laboratoiy of Omplex Systems and Intelligence Science Institute of Automation Chinese Academy of Sciences Beijing China [c]Bioluminescent Tomography Laboratoiy Department of Radiology & Department of Biomedical Engineering University of Iowa Iowa City tIowa USA

As a challenging task for bioluminescent tomography simulation, a virtual optical environment is needed to solve the forward problem accurately, that is, to achieve a high precision for bioluminescent signal synthesis on the external body surface of a small animal. The molecular optical simulation environment named MOSE is implemented using the C++ programming language and the OpenGL techniques, including a user-friendly interface with interactive tools facilitating users' operations. The accuracy of the virtual optical environment is verified by error analysis of mesh simplification and comparison between MOSE results and experimental data. This virtual optical environment is accurate, flexible and efficient to simulate the photon propagation in complicated tissues, which has a great potential to become a software platform for bioluminescent tomography studies and other molecular imaging applications.

关键词： molecular imaging biolumlnescent tomography photon propagation Monte Carlo method.

On Extension of Isometries in (F)-Spaces

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Acta Mathematica Sinica,English Series 1996年第1期12卷 1-9页

作者： Ding Guanggui Huang Senzhong department of Mathematics Nankai university Tianjin, 300071 China department of Mathematics university of Iowa Iowa city IA 52.42.usa department of Mathematics Nankai university Tianjin, 300071 China Mathematisehes Institut Universitat Tubingen Auf der Morgenstelle 10 72.76 Tubingen Germany 南开大学数学系天津

An(F)-space E is said to be locally midpoint constricted (in short, Imp-constricted) if there exists some δ>0 such that D(A/2. 详细信息

An(F)-space E is said to be locally midpoint constricted (in short, Imp-constricted) if there exists some δ>0 such that D(A/2.ut the question whether each isometry between two (F)-spaces is affine are obtained.

关键词： Locally midpoint constricted Isometry Affine homeomorphism

Heat treatment of novel low-carbon multi-alloyed anti-wear marine steel

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Progress in Natural Science:Materials International 2011年第3期21卷 254-261页

作者： Jing-hua JIANG~(1,2.,Qiu-yue WANG~1,Ai-bin MA~(1,2.,Jun SHI~1,Liu-yan ZHANG~1, Hui-dong YANG~(2.3),Fu-min LU~2.Qi ZHOU~2.1.National Engineering Research Center of Water Resources Efficient utilization and Engineering Safety, Hohai university,Nanjing 2.0098,China 2.College of Mechanics and Materials,Hohai university,Nanjing 2.0098,China 3.{2. of Mechanical and Aerospace Engineering,North Carolina State university, Raleigh,North Carolina 2.695-7919,usa [a] National Engineering Research Center of Water Resources Efficient utilization and Engineering Safety Hohai University Nanjing 210098 China [b] College of Mechanics and Materials Hohai University Nanjing 210098 China [c] department of Mechanical and Aerospace Engineering North Carolina State University Raleigh North Carolina 27695-7919 USA

A low-carbon anti-wear steel,multi-alloyed with Si-Cr-Mn-Al-Ni-Mo-（Nb,RE）,was designed for vane pumps of ships. The novel cast steel after various heat treatments was characterized by microstructure observations and mechanical properties measurement in order to achieve an optimal process correlated with good abrasive resistance for a long marine *** scanning calorimetry and hardness analyses deduced a complete austenitizing temperature of 1 000℃,based on the alloying element homogenization and defective structure elimination without grain *** optimal austempering process（austenitized at 1 000℃,quick cooled for holding at 350℃for 1.5 h and then air-cooled to room temperature） produced a uniform mixture structure of fine carbide-free aciculate bainites and few lath martensites,resulting in the tensile strength increase of 34%and impact toughness increase of 50%compared with that of the as-cast *** abrasive wheel tests show that the austempered steel has good wear resistance with a mass-loss rate of 170 mg/（km·cm2. under applied load of 70 N in acidic *** new grade steel （containing anti-corrosion elements of Cr and rare earth） can find wide application in marine engineering,with further enhanced comprehensive properties via melting process improvement.

关键词： abrasive resistance carbide-free bainite marine steel mechanical performance heat treatment

Mapping forest fire risk zones with spatial data and principal component analysis

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Science China(Technological Sciences) 2006年第z1期49卷 140-149页

作者： XU Dong, Guofan Shao, DAI Limin, HAO Zhanqing, TANG Lei & WANG Hui Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China Graduate university of Chinese Academy of Sciences, Beijing 100039, China department of Forestry and Natural Resources, Purdue university, West Lafayette, IN 47907, usa department of Management, Shenyang Institute of Aeronautical Engineering, Shenyang 110034, China department of city Development, Jinan university, Jinan 2.0002. China 1. Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China2. Graduate University of Chinese Academy of Sciences Beijing 100039 China3. Department of Forestry and Natural Resources Purdue University West Lafayette IN 47907 USA4. Department of Management Shenyang Institute of Aeronautical Engineering Shenyang 110034 China5. Department of City Development Jinan University Jinan 250002 China

By integrating forest inventory data with remotely sensed data, new data layers for factors that affect forest fire potentials were generated for Baihe Forestry Bureau in Jilin Province of China. The principle component analysis was used to sort out the relationships between forest fire potentials and environmental factors. The classifications of these factors were performed with GIS, generating three maps: a fuel-based fire risk map, a topography-based fire risk map, and an anthropogenic-factor fire risk map. These three maps were then synthesized to generate the final fire risk map. The linear regression method was used to analyze the relationship between an area-weighted value of forest fire risks and the frequency of historical forest fires at each forest farm. The results showed that the most important factor contributing to forest fire ignition was topography, followed by anthropogenic factors.

关键词： wildfire risk, regression analysis, geographic information system, remote sensing, Baihe Forestry Bureau.

Direct evidence of transformation from smectite to palygorskite:TEM investigation

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Science China Earth Sciences 2004年第11期47卷 985-994页

作者： CHEN Tianhu1,,XU Huifang2.LU Anhuai3,XU Xiaochun1,PENG Shuchuan1 2.&YUE Shucang1 1.College of Resources and Environmental Engineering,Hefei university of Technology,Hefei 2.0009,China 2.department of Geology and Geophysics,university of Wisconsin,Madison,WI53706,usa 3.department of Geology,Peking university,Beijing 100871,China Correspondence should be addressed to Chen Tianhu(email: tianhu@*** or cth168@***) 1. College of Resources and Environmental Engineering Hefei University of Technology 230009 Hefei China 2. department of Geology and Geophysics University of Wisconsin WI53706 Madison USA 3. department of Geology Peking University 100871 Beijing China

Palygorskite clays sampled from palygorskite clay deposits in Jiangsu and Anhui provinces were investigated by transmission electron microscopy (TEM). Many intergrowth phenomena of special ultra-microstructure between smectite and palygorskite were found. The ultra-microstructure indicates that palygorsite fiberrous crystals grow along (001) of primary smectite through structural transformation and decomposition of the primary smectite. According to field investigation and X-ray diffraction (XRD) analyses, the transformation mechanism and process can be described as: formation of smectite from basalt weathering deposited in localiza- tion basin; evaporation of lake water in aridity environment causing pH increase and concentra- tion of magnesium ion in interstice water of sediment smectite in the lake basin. Under alkaline conditions, magnesium ion occupied interlayer positions of the smectite. Because of the misfit between magnesium octahedral sheet and smectite layer, magnesium ion interaction with smec- tite layers caused the smectite to transform into palygorskite, and resulted in the formation of smectite and palygorskite complex particulates, and even smaller secondary smectite crystal plates. The transformation of smectite structure resulted in the formation of nanometer minerals with large specific surface area and excellent property of physics and chemistry in smec- tite-palygorskite mixing clay. The results from TEM investigation are important for understanding properties of palygorskite clay and application.

关键词： palygorskite, smectite, transmission electron microscopy, X-ray diffraction, nanometer mineralogy.

Model-based interferometric interpolation method

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Model-based interferometric interpolation method