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Special Orientation Relationships Observed at the Early Stages of Recrystallization in Pure AlMn Alloy

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International Journal of Minerals,Metallurgy and Materials 1998年第3期12卷 140-146页

作者： Ping Yang(Material Science and engineering school, university of Science and Technology beijing, beijing 100083, china)(institute for Metal Science and Metal Physics, Aachen university of Technology, D-52056, Aachen, Germany) Material Science and engineering school University of Science and Technology Beijing Beijing 100083 China institute for Metal Science and Metal Physics Aachen University of Technology D-52056 Aachen Germany

Electron Back Scattering Diffraction (EBSD) technique in a SEM was used to obtain local orientationalinformation on new grains and their surrounding deformed matrices at the early stages of recrystallization in pureA1-1 .3%Mn alloy. Results show that special orientation relationships including twin-relationship often exist betweennew grains, between new grains and deformed grains or between deformed grains. The occurrence of such specialorientation relationships is attributed to the special deformation behavior in the samples with large initial grain *** formation of recrystallization twins is discussed in a different way to those of traditional ones.

关键词： Orientation relationship recrystallization AlMn, EBSD

Analysis of Microstructure and Orientation in X80 Line Pipe Steels

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Journal of Iron and Steel research International 2011年第S1期18卷 664-668页

作者： JI Ling-kang 1,2,LI Yang 2,3,MENG Li 3,LI He-lin 2 (1.school of Material Science and engineering,Xi’an Jiaotong university,Xi’an 710049,Shaanxi,china 2.CNPC Tubular Goods research institute,Xi’an 710065,Shaanxi,china 3.school of Material Science and engineering,university of Science and Technology beijing,beijing 100083,china) Xi An Jiao Tong Univ Sch Mat Sci & Engn Xian 710049 Shaanxi Peoples R China CNPC Tubular Goods Res Inst Xian 710065 Shaanxi Peoples R China Univ Sci & Technol beijing Sch Mat Sci & Engn Beijing 100083 Peoples R China

Microstructures in X80 line pipe were classified by SEM *** experimental results showed that the microstructures in X 80 line pipe steels were complicated consisting of polygonal ferrite,bainite and acicular *** relation within acicular ferrite was investigated systematically by means of *** sub-structures were observed maximum in acicular ferrite which gives high strength and high toughness to line pipe *** K-S orientation relation was generally observed between acicular ferrite and austenite during phase *** low energy CSL boundary characterized by Σ3 orientation relation according to Brandon criterion appeared with higher probability,which was benefit to improve the mechanical properties of line pipe *** orientations or texture of initial austenite grains could be deduced based on the Σ3 orientation relationship of acicular ferrite variants.

关键词： acicular ferrite EBSD K-S orientation relation TMCP

Influence of expressed TRAIL on biophysical properties of the human leukemic cell line Jurkat

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Cell research 2004年第2期14卷 161-168页

作者： Kai CHEN~(1,*), Dan LI~(1,*), Yu Hui JIANG~1, Wei Juan YAO~1, Xin Juan WANG~2, Xiao Chao WEI~2, Jing GAO~3, Li De XIE~1, Zong Yi YAN~4, Zong Yao WEN~(1**), Shu CHIEN~5 ~1Hemorheology Center, Department of Biophysics, school of Basic medical Sciences, peking university, beijing, 100083, china. ~2Department of Biochemical and Molecular Biology, school of Basic medical Sciences, peking university, beijing, 100083, china. ~3Department of Urology, medical Center, New York university, USA. ~4Department of Mechanics and engineering Science, peking university, beijing 100871, china. ~5Department of Bioengineering and Whitaker institute of Biomedical engineering, university of California, San Diego, La Jolla, CA 92093-0412, USA Department of Biophysics Hemorheology Center School of Basic Medical Sciences Peking University Beijing China Department of Biochemical and Molecular Biology School of Basic Medical Sciences Peking University Beijing China Department of Urology Medical Center New York University USA Department of Mechanics and engineering Science Peking University Beijing China Department of Bioengineering and Whitaker institute of Biomedical engineering University of California La Jolla USA

The cDNA fragment of human TRAIL (TNF-related apoptosis inducing ligand) was cloned into RevTet-On, a Tetregulated and high-level gene expression system. The gene expression system was constructed in a human leukemic cell line: Jurkat. By using RevTet-On TRAIL gene expression system in Jurkat as a cell model, we studied the influence of TRAIL gene on the changes of cellular apoptosis before and after the TRAIL gene expression, which was induced by adding tetracycline derivative doxycycline (Dox). The results indicated that the cellular apoptosis ratio was largely dependent on the TRAIL gene expression level. Moreover, it was found that the apoptosis-inducing TRAIL could cause significant changes in the biophysical properties of Jurkat cells. The cell surface charge density decreased, the membrane fluidity declined, the elastic coefficients K_I increased, and the proportion of α-helix in membrane protein secondary structure decreased. Thus, the apoptosis-inducing TRAIL gene caused significant changes on

关键词： TRAIL Tet gene expression system Jurkat apoptosis.

Fluorescence dynamics of interactions between polyamide PyPyPyβDp and DNA

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Science china Chemistry 2006年第1期49卷 75-80页

作者： ZHANG Huijuan1,2, WANG Jin3, WU Yishi1, YUAN Gu3, AI Xicheng1, WANG Li4 & ZHANG Jianping1 1. State Key Laboratory for Structural Chemistry of Unstable and Stable Species, institute of Chemistry, Chinese Academy of Sciences, beijing 100080, china 2. school of Life Science and Technology, beijing institute of Technology, beijing 100081, china 3. College of Chemistry and Molecular engineering, peking university, beijing 100080, china 4. Center for Condensed Matter Physics, institute of Physics, Chinese Academy of Sciences, beijing 100080, china Correspondence should be addressed to Ai Xicheng and Zhang Jianping State Key Laboratory for Structural Chemistry of Unstable and Stable Species Institute of Chemistry Chinese Academy of Sciences Beijing China school of Life Science and Technology Beijing Institute of Technology Beijing China College of Chemistry and Molecular engineering Peking University Beijing China Center for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing China

The photophysical properties of the polyamide PyPyPyβDp (PPP) were investigated by means of steady-state absorption and fluorescence spectroscopies, as well as time-resolved fluo-rescence spectroscopy. It was found that the excited-state properties of PPP are very sensitive to solvents. In TKMC buffer PPP exhibited weak fluorescence with a decay time constant of 16 ps, while with the decrease of the solvent polarity PPP showed the blue-shifted peak position, increased inten-sity and lengthened life-time for its fluorescence behavior. In the presence of calf thymus DNA, it was observed that the fluorescence intensity was enhanced and the fluorescence lifetime increased from 16 to 32 ps for PPP, which verified that PPP bound into the minor groove of DNA duplex.

关键词： polyamide (PPP), calf thymus DNA (ctDNA), time-resolved fluorescence spectroscopy, recognition dynamics.

An efficient chiral synthesis of (R)-N-[3-acetyl-4-(2-hydroxy-3-isopropylamino-propoxy)phenyl]-butanamide with high enantioselectivity

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Science china Chemistry 2009年第8期52卷 1216-1219页

作者： WANG NaiXing1,2 & TANG XinLiang1,3 1 Technical institute of Physics and Chemistry,Chinese Academy of Sciences,beijing 100080,china 2 College of Chemistry and Chemical engineering,Graduate university of Chinese Academy of Sciences,beijing 100049,china 3 school of Chemical engineering and Environment,beijing institute of Technology,beijing 100081,china Technical institute of Physics and Chemistry Chinese Academy of Sciences Beijing China College of Chemistry and Chemical engineering Graduate University of Chinese Academy of Sciences Beijing China school of Chemical engineering and Environment Beijing Institute of Technology Beijing China

R-Enantiomer of the β-receptor antagonist N-[3-acetyl-4-(2-hydroxy-3-isopropylamino-propoxy)phenyl] butanamide with high enantioselectivity was synthesized from cheap starting materials and enantiopure chiral reagent through an efficient,convenient and practical synthetic *** product was detected by 1H NMR,13C NMR,and MS,and the enatiomeric excess was determined by chiral HPLC analysis using a chiracel AD-H column.

关键词： chiral synthesis enantioselectivity enatiomeric excess chiral HPLC analysis

Consensus of multiagent systems based on disturbance observer

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控制理论与应用（英文版） 2010年第2期8卷 145-150页

作者： Hongyong YANG 1 , Fucai WANG 2 , Zhenxing ZHANG 3 , Guangdeng ZONG 4 (1.school of Information Science and engineering, Ludong university, Yantai Shandong 264025, china 2.school of Electronic and Electrical engineering, Ludong university, Yantai Shandong 264025, china 3.school of Automation, Southeast university, Nanjing Jiangsu 210096, china 4.institute of Automation, Qufu Normal university, Qufu Shandong 273165, china) school of Information Science and engineering Ludong University Yantai Shandong China school of Electronic and Electrical engineering Ludong University Yantai Shandong China school of Automation Southeast University Nanjing Jiangsu China institute of Automation Qufu Normal University Qufu Shandong China

The objectives of this work are the development and design of disturbance observers (DO’s) for a team of agents that accomplish consensus on agents’ states in the presence of exogenous disturbances. A pinning control strategy is designed for a part of agents of the multiagent systems without disturbances, and this pinning control can bring multiple agents’ states to reaching an expected consensus value. Under the effect of the disturbances, nonlinear disturbance observers are developed for disturbances generated by an exogenous system to estimate the disturbances. Asymptotical consensus of the multiagent systems with disturbances under the composite controller can be achieved. Finally, by applying an example of multiagent systems with switching topologies and exogenous disturbances, the design of the parameters of DO’s are illuminated.

关键词： Multiagent systems Disturbance observer Pinning control Consensus

Thrombin-like enzymes from venom gland of Deinagkistrodon acutus:cDNA cloning,mechanism of diversity and phylogenetic tree construc-tion

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Acta Pharmacologica Sinica 2006年第2期27卷 184-192页

作者： Xiang-dong ZHA~(2,3,7) He-sheng HUANG~(4,7) Li-zhi ZHOU~(2,3) Jing LIU~5 Kang-sen XU~6 ~2school of Life Sciences,Anhui university,Hefei 230039,china ~3Anhui Key Laboratory of Eco-engineering and Bio-techniques,Hefei 230039,china ~4Department of Pharmacology,Anhui medical university.Hefei 230022,china ~5school of Life Sciences,university of Science and Technology of china,Hefei 230026,china ~6institute for Control of Pharmaceuticals and Biological Products,beijing 100050,china school of Life Sciences Anhui University Hefei China Anhui Key Laboratory of Eco-engineering and Bio-techniques Hefei China Department of Pharmacology Anhui Medical University Hefei China school of Life Sciences University of Science and Technology of China Hefei China institute for Control of Pharmaceuticals and Biological Products Beijing China

Aim:To clone cDNAs of thrombin-like enzymes(TLEs)from venom gland ofDeinagkistrodon acutus and analyze the mechanisms by which their structuraldiversity ***:Reverse transcription-polymerase chain reaction andgene cloning techniques were used,and the cloned sequences were analyzed byusing bioinformatics ***:Novel cDNAs of snake venom TLEs *** possibilities of post-transcriptional recombination and horizontalgene transfer are discussed.A phylogenetic tree was ***:The cDNAs of snake venom TLEs exhibit great *** are severaltypes of structural *** variations may be attributable to certainmechanisms including recombination.

关键词： thrombin-like enzymes structural diversity RNA recombination phylogenetic tree

WAVE BOTTOM LAYERS DYNAMIC WITH SUSPENDED SEDIMENT OVER VORTEX RIPPLES

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Journal of Hydrodynamics 2004年第2期16卷 201-208页

作者： JIANGChang-bo BAIYu-chuan ZHAOZi-dan ZHANGHong-wu CollegeofRiverandOceanengineeringChangshauniversityofScienceandTechnology Changsha410076China instituteofSedimentonRiverandCoastengineering TianjinUniversityTianjin300072China schoolofCivilengineering TsinghuaUniversityBeijing100084China

Vortex ripple is widely formed in the coastal region, and the dynamic ofvortex is quite important because it is responsible for sediment transport. The flow structurearound the vortex ripples can be modeled as 2D flow due to the geometry of the flow boundaries. Inthis paper, 2D Large-Eddy-Simulation (LES) method was used to predict the flow structure and thedynamic of vortex in the bottom layers under the action of the wave, the numerical simulationresults show a completely process of vortex formation, evolvement and disappearance. Based on thestudy of flow structure, the suspended sediment transport was modeled in present paper. Thesimulated sediment concentrations were compared to measurements from the literature. The agreementbetween the time averaged simulated concentration profiles and measurements is satisfactory. For ahigh setting velocity, the suspended sediment is confined to the vicinity of the bed, and it isdominated by the local bottom shear stress. For a small setting velocity, the suspension is moredominated by the characteristic of vortex. There are two suspended sediment transport peaks observedin the cross-section at the trough and crest in the half period, the second peak is due to theseparation bubble taking the sediment.

关键词： wave boundary layer vortex ripple suspended sediment numerical model

New development thoughts on the bio-inspired intelligence based control for unmanned combat aerial vehicle

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Science china(Technological Sciences) 2010年第8期53卷 2025-2031页

作者： DUAN HaiBin 1 ,SHAO Shan 2 ,SU BingWei 3 &ZHANG Lei 41 State Key Laboratory of Science and Technology on Holistic Flight Control,school of Automation Science and Electrical engineering, beijing university of Aeronautics and Astronautics,beijing 100191,china 2 Flight Control Department,Shenyang Aircraft Design and research institute,Shenyang 110035,china 3 beijing institute of Near Space Vehicle’s System engineering,beijing 100076,china 4Integration and Project Section,Air Force Equipment Academy,beijing 100085,china State Key Laboratory of Science and Technology on Holistic Flight Control School of Automation Science and Electrical Engineering Beijing University of Aeronautics and Astronautics Beijing China Flight Control Department Shenyang Aircraft Design and Research Institute Shenyang China beijing institute of Near Space Vehicle’s System engineering Beijing China Integration and Project Section Air Force Equipment Academy Beijing China

Bio-inspired intelligence is in the spotlight in the field of international artificial intelligence,and unmanned combat aerial vehicle(UCAV),owing to its potential to perform dangerous,repetitive tasks in remote and hazardous,is very promising for the technological leadership of the nation and essential for improving the security of *** the basis of introduction of bioinspired intelligence and UCAV,a series of new development thoughts on UCAV control are proposed,including artificial brain based high-level autonomous control for UCAV,swarm intelligence based cooperative control for multiple UCAVs,hy-brid swarm intelligence and Bayesian network based situation assessment under complicated combating environments, bio-inspired hardware based high-level autonomous control for UCAV,and meta-heuristic intelligence based heterogeneous cooperative control for multiple UCAVs and unmanned combat ground vehicles(UCGVs).The exact realization of the proposed new development thoughts can enhance the effectiveness of combat,while provide a series of novel breakthroughs for the intelligence,integration and advancement of future UCAV systems.

关键词： bio-inspired intelligence unmanned combat aerial vehicle(UCAV) artificial brain autonomous control bayesian network bio-inspired hardware heterogeneous cooperative control