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Properties of the 3/2.-[52.] band in the odd-N rare-earth nuclei

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Science china(Physics,Mechanics & Astronomy) 2011年第S1期54卷 37-43页

作者： CHEN Liang1,2. ZHOU XiaoHong1,2. ZHANG YuHu1, ZHANG ShuangQuan3 & ZHU LiHua4 1institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, china 2.raduate University of Chinese Academy of Sciences, Beijing 100049, china 3State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, china 4china institute of atomic energy, Beijing 102.1., china institute of Modern Physics Chinese Academy of Sciences Lanzhou China Graduate University of Chinese Academy of Sciences Beijing China State Key Laboratory of Nuclear Physics and Technology School of Physics Peking University Beijing China china institute of {2. energy Beijing China

High-spin states in 161Er have been studied experimentally via the 150Nd(16O, 5n) reaction at a beam energy of 86 MeV. Three rotational bands built on the 5/2.[642., 3/2.[52.], and 11/2.[505] configurations have been extended up to high-spin states, and particularly, the α = -1/2.branch of the ground state 3/2.[52.] band has been revised significantly. It is found that signature inversion occurs in the 3/2.[52.] band after the band crossing in 161Er. The systematics of the signature inversion associated with the 3/2.[52.] configuration in the rare-earth region is discussed. The band properties are analyzed within the framework of a triaxial particle-rotor model, and a triaxial deformation is proposed to the 3/2.[52.] band.

关键词： high-spin states signature inversion triaxial particle-rotor model

Ecological hydraulic radius model to calculate instream flow requirements for transporting sediment in the western water transfer region

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Science china(Technological Sciences) 2009年第11期52卷 3401-3405页

作者： MEN BaoHui1 & LIU ChangMing2.1 Renewable energy institute, North{2. Electric Power University, Beijing 102.06,{2. 2.Key Laboratory of Water Cycle and Related Land Surface Process, institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101,{2. Renewable energy institute North China Electric Power University Beijing China Key Laboratory of Water Cycle and Related Land Surface Process Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences Beijing China

Transporting sediment is a natural function of the river. To maintain the normal evolution of the river certain amount of water flow is required, which is called the instream flow requirements for transporting sediment (IFRTS). We defined the permitting flow velocity by the conception of IFRTS, and also put forward the ecological hydraulic radius model (EHRM) to estimate IFRTS. The calculating process of EHRM is explained by the example of Daofu Hydrological Station on Xianshui branch of Yalong River in the west line first-stage construction of South-North Water Transfer Project. The result shows that the IFRTS occupied 2..7%―59.5% of annual mean discharge in flood season, the average of IFRTS was about 100.2.m3/s during 1966―1987, it is close to the IFRTS 90 m3/s calculated by IFRTS conception. Hence, it is feasible to use EHRM to calculate IFRTS.

关键词： ecological hydraulic radius model (EHRM) instream flow requirements for transporting sediment (IFRTS) permitting flow velocity ecological hydraulic radius for transporting sediment

Phase equilibrium calculation of multi-component gas separation of supersonic separator

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Science china(Technological Sciences) 2010年第3期53卷 435-443页

作者： BAO LingLing1, LIU ZhongLiang1, LIU HengWei1, JIANG WenMing1, ZHANG Ming1 & ZHANG Jian2.1 Education Ministry Key Lab of Enhanced Heat Transfer & energy Conversation, College of Environmental and energy Engineering, Beijing University of Technology, Beijing 10012.,{2. 2.Shengli Engineering & Research institute, Shengli Oil Field Ltd, SINOPEC, Dongying 2.702.,{2. Education Ministry Key Lab of Enhanced Heat Transfer & energy Conversation College of Environmental and Energy Engineering Beijing University of Technology Beijing China Shengli Engineering & Research institute Shengli Oil Field Ltd SINOPEC Dongying China

A mathematical model for phase equilibrium prediction of multi-component gas separation process inside a supersonic separator is established and an efficient numerical solution method is designed. The model and the numerical method are then used to predict the phase equilibrium characteristics and the separation performance of a field test natural gas supersonic purification separator. The predicted results are generally in good agreement with the field test measurements, which proves that the phase equilibrium model and the solution method are both reliable and accurate, and can be used for the prediction of the vapor and liquid phase equilibrium and the separation performance and the configuration optimization of supersonic separator.

关键词： supersonic separator BWRS equation vapor-liquid separation phase equilibrium

Status of study on biological and toxicological effects of nanoscale materials

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Science china Chemistry 2005年第5期48卷 385-394页

作者： WANG Bing1, FENG Weiyue1, ZHAO Yuliang1, XING Gengmei1, CHAI Zhifang1, WANG Haifang2.& JIA Guang3 1. Laboratory for Bio-Environmental Health Sciences of Nanoscale Materials (Nanosafety Lab), institute of High energy Physics, Chi-nese Academy of Sciences, Beijing 100049,{2. 2. College of Chemistry and Molecular Engineering, Peking University, Beijing 100871,{2. 3. Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing 100083,{2. Laboratory for Bio-Environmental Health Sciences of Nanoscale Materials (Nanosafety Lab) Institute of High Energy Physics Chinese Academy of Sciences Beijing China College of Chemistry and Molecular Engineering Peking University Beijing China Department of Occupational and Environmental Health Sciences School of Public Health Peking University Beijing China

Because the physical and chemical properties of nanosized materials mostly differ from the existing microsized materials, their potential impacts on human health and the envi-ronment will be topics under the serious discussions in press and in a number of international scientific journals. We analyze and summarize the existing data of the experimental study on the biological activities and adverse effects of nanoscale materials/particles including single wall carbon nanotubes, multi wall carbon nanotubes, titanium oxide and iron powders. Though some biological behaviors of nanoscale materials observed cannot be understood on the basis of the current knowledge, as the existing data are mostly preliminary, it is too early to make some ex-clusive conclusions on biological activities (or the toxicity) of any of nanoscale materials. The experimental techniques, the current topics, and the future research directions for this new re-search field are also discussed.

关键词： nanomaterials, single wall carbon nanotubes, multi wall carbon nanotubes, titanium oxide and iron, biological activity and toxicological effect.

Comparison study of trapped water in human erythrocytes by EPC and DSC method and its application

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Science china(Technological Sciences) 2004年第3期47卷 343-351页

作者： ZHAO Gang1, HE Liqun1, GUO Xiaojie2. LIU Zhong3, LUO Dawei1,3 & GAO Dayong1,3 1. Cryobiomedical Engineering Research institute, Department of Thermal Science and energy Engineering, University of Science and Technology of{2., Hefei 2.002.,{2. 2. Red Cross Blood Center of Hefei, Hefei 2.002.,{2. 3. Department of Mechanical Engineering, University of Kentucky, Lexington, KY 40506-0108, USA Cryobiomedical Engineering Research institute Department of Thermal Science and Energy Engineering University of Science and Technology of China Hefei 230027 China Red Cross Blood Center of Hefel Hefei 230022 China Department of Mechanical Engineering University of Kentucky Lexington KY 40506-0108 United States

The novel differential scanning calorimetry method for determining trapped water volume of human red blood cell during freezing process has been reexamined. Results show that the final erythrocyte volume is 53% of its isotonic volume after freezing to -40℃. An electronic particle counter (MultisizerTM III, Beckman Coulter Inc., USA) was used to measure cell volume changes in response to hypertonic solution. Using this approach, when extracellular solution was 3186 mOsm, the equilibrium cell volume was found to be 57% of its isotonic value. Both results indicate that 34%—40% of intracellular water is trapped and cannot respond to osmotic difference between intra- and extracellular solution. These findings are consistent with the published data: at least 2.%—32. of the isotonic cell water volume is retained within RBCs during freezing. Some applications of the values of trapped water are addressed.

关键词： differential scanning calorimeter/DSC, electronic particle counter/EPC, cell volumetric change, red blood cell/RBC/erythrocyte

Synthesis of superheavy nuclei with ^(2.8)U target

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Science china(Physics,Mechanics & Astronomy) 2009年第10期52卷 1482-1488页

作者： LIU ZuHua1,3 & BAO JingDong2.4 1 Key Laboratory of Beam Technology and Material Modification of Ministry of Education,Beijing Normal University,Beijing 100875,china 2.Department of Physics,Beijing Normal University,Beijing 100875,china 3{2. institute of atomic energy,Beijing 102.1.,china 4 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator of Lanzhou,Lanzhou 730000,china Key Laboratory of Beam Technology and Material Modification of Ministry of Education Beijing Normal University Beijing China china institute of {2. energy Beijing China Department of Physics Beijing Normal University Beijing China Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator of Lanzhou Lanzhou China

The production of superheavy nuclei with Z=108-116 via hot fusion reactions of the neutron-rich projectiles with 2.8U target is systematically *** results show that the production cross sections of superheavy nuclei do not decrease monotonously as the atomic number Z *** cross sections of the superheavy nuclei at Z = 112.and 115 are enhanced as compared with the whole Z-trend in synthesis of the superheavy nuclei,which clearly illustrates that the reactions with large negative Q-value and shell correction are more favorable to synthesize superheavy nuclei.

关键词： superheavy nuclei fusion reaction cross section 2.8U target

Simulation of aerodynamic performance affected by vortex generators on blunt trailing-edge airfoils

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Science china(Technological Sciences) 2010年第1期53卷 1-7页

作者： YANG Ke1,2.ZHANG Lei1,3 & XU JianZhong1,2.1 institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100190,china 2.Key Laboratory of Wind {2. Utilization,Chinese Academy of Sciences,Beijing 100190,china 3 Graduate School of Chinese Academy of Sciences,Beijing 100190,china institute of Engineering Thermophysics Chinese Academy of Sciences Beijing China Key Laboratory of Wind energy Utilization Chinese Academy of Sciences Beijing China Graduate School of Chinese Academy of Sciences Beijing China

An investigation was carried out by numerical simulation on a wind turbine airfoil and a blunt trailing-edge airfoil with and without vortex generators (VGs), and the performance of the airfoils was analyzed. By the simulation of airfoil DU 91-W2.2.0 it was verified that the numerical method and model were credible. Based on this airfoil, a new one with a blunt trailing edge of 6% chord was blended by symmetrically adding thickness, and its characteristics curves were obtained through computing at key angles of attack. Additionally, the pressure distribution on blended airfoil was analyzed by comparing to the airfoil without blend. The interaction of streamwise vortices induced by VGs with trailing vortex or separation vortex was considered, followed by the uncovery of how VGs can suppress the boundary layer separation.

关键词： vortex generators airfoil blunt trailing-edge

Further research on high-spin structure in ^(161)Lu

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Science china(Physics,Mechanics & Astronomy) 2008年第3期51卷 315-320页

作者： LI YanXia1,2.YU ShaoYing1,2.4,SHEN CaiWan1,5,LI XiaoWei6 & CHEN YongShou3,4 1 School of Science,Huzhou Teachers College,Huzhou 313000,china 2.College of Mathematics,Physics and Information Engineering,Zhejiang Normal University,Jinhua 32.000,china 3{2. institute of atomic energy,Beijing 102.1.,china 4 institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100080,china 5 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator of Lanzhou,Lanzhou 730000,china 6 Department of Physics,Chifeng University,Chifeng 02.001,china School of Science Huzhou Teachers College Huzhou China College of Mathematics Physics and Information Engineering Zhejiang Normal University Jinhua China institute of Theoretical Physics Chinese Academy of Sciences Beijing China Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator of Lanzhou Lanzhou China Department of Physics Chifeng University Chifeng China china institute of {2. energy Beijing China

The two-dimensional total routhian surface (TRS) calculations were performed to probe into the triaxial superdeformed characteristics of a strongly populated band X2.in 161Lu. This band was identified as a triaxial superdeformed band by using our TRS method. We also got its formation mechanics,i.e. the neutron-shell correction energy plays a crucial role,while the rotating energy and the deformation-driving effect of high j intruder orbit i13/2.also play an additional role.

关键词： TRS method triaxial superdeformation formation mechanism

Adsorption behavior of hexadecyltrimethylammonium bromide (CTAB) to mica substrates as observed by atomic force microscopy

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Science china Chemistry 2005年第2期48卷 101-106页

作者： ZHAO Feng1,2. DU Yukou1, YANG Ping1, LI Xingchang2.& TANG Ji’an2.1. Chemistry and Chemical Engineering Department, Suzhou University, Suzhou 2.5006, china 2. Key Laboratory of Colloid and Interface Science, institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, china Correspondence should be addressed to Tang Ji’an (email: jatang@***) Chemistry and Chemical Engineering Department Suzhou University Suzhou China Key Laboratory of Colloid and Interface Science Institute of Chemistry Chinese Academy of Sciences Beijing China

atomic force microscopy is employed to study the adsorption behavior of CTAB to mica surfaces. Results show that conformational transitions from globular micelles→cylindrical micelles→flat films are observed in the process of the adsorption of CTAB to mica at twice the bulk critical concentration. However, in 0.5 cmc CTAB solution, the adsorbed CTAB molecules to mica form the layered film structures, and apparent conformational transitions do not appear. Meanwhile, the phenomena of the adsorption of CTAB to mica and the dissociation of mica sur- faces are periodically observed.

关键词： atomic force microscopy (AFM), micelle, behavior of adsorption, the dissociation of mica surfaces.