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含能材料 2001年第1期9卷 8-9页

作者： HU Rong zu 1, YANG De suo 2. ZHANG Jiao qiang 3. (1. Department of Chemistry,Northwest University, Xi′an 710065, china 2. Department of Chemistry and Chemical Engineering, Baoji College of Arts and Science, Baoji 72.007, china 3. Department of 西北大学陕西西安 710065 宝鸡文理学院陕西 721007 西北工业大学陕西西安 710072

Two relationships are established using the least squares method,between the kinetic parameters (the apparent activation energy and pre exponential constant),and the exothermic decomposition temperature and ther... 详细信息

关键词： critical temperature of thermal explosion decomposition temperature DSC energetic materials.

Luminescence of RE^(3.) and energy transfer from Gd^(3.) to RE^(3.) (RE = Dy, Eu) in SrGdAlO_4:RE^(3.)

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chinese Journal of Chemistry 1997年第1期15卷 60-67页

作者： LIU, Sheng-Li SU, QiangLaboratory of Rare Earth Chemistry and physics, Changchun institute of Applied Chemistry, {2. Academy of {3., Changchun, Jilin 13.02., china Laboratory of Rare Earth Chemistry and physics Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun Jilin 130022 China

Spectral properties of Gd3., Dy3. and Eu3. ions in SrGdAlO4 are reported in detail. A cooperative vibronic transition of Gd3. and the emission from the higher 5DJ (J=1, 2. 3. levels of Eu3. were observed. energy transfer occurs from Gd3. to Dy3. and to Eu3.. The influence of Gd3. and Dy3. concentrations on the luminescence intensity is discussed.

关键词： Luminescence energy transfer rare earth aluminate

Theoretical study on the reaction mechanism of(CH_3._3.O+CO

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Science china Chemistry 2005年第1期48卷 18-24页

作者： ZHAO Hongmei1,2.3. SUN Chengke1,4, ZHANG Rongchang3. XI Hongmin3.& LI Zonghe1 1. Department of Chemistry, Beijing Normal University, Beijing 100875, china 2. The Laboratory of Molecular Reaction Dynamics, institute of Chemistry, chinese Academy of {3., Beijing 100080, china 3. Department of Chemistry, Beihua University, Jilin 13.013. china 4. Department of Chemistry, Qujing Normal University, Yunnan 655000, china Department of Chemistry Beijing Normal University Beijing China The Laboratory of Molecular Reaction Dynamics Institute of Chemistry Chinese Academy of Sciences Beijing China Department of Chemistry Beihua University Jilin China Department of Chemistry Qujing Normal University Yunnan China

The reaction mechanism of (CH3.3.O with CO has been theoretically investigated using density-functional theory (DFT) calculations at B3.YP/6-3.G* level. In order to get more reliable energy values the single-point energy is evaluated at CCSD (T)/6-3.++G** level. The results show that the reaction is multi-channel and the reaction of (CH3.3.O radical with CO mostly produces (CH3.3. + CO2. The reaction could play a role in eliminating air pollution.

关键词： DFT, B3.YP, (CH3.3.O, radical.

The effects of shock wave and quasi-traveling wave in the mechanical impact test

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Science china(Technological sciences) 2010年第9期53卷 2535-2541页

作者： WU Mei1,5,SUN ZhongFeng2.ZHANG LuMei3.CHEN Yong1 & JI LinHong4 1 institute of high energy physics,{2. Academy of sciences,Beijing 100049,{3. 2.School of Mathematical sciences,Peking University,Beijing 100871,{3. 3.high School of Central University for Nationalities,Beijing 100081,{3. 4 institute of Mechanical Design,Department of Precision Instruments and Mechanology,Tsinghua University,Beijing 100084,{3. 5 Academy of Opto-electronics,{2. Academy of sciences,Beijing 100190,{3. institute of high {2. {3. Chinese Academy of Sciences Beijing China Academy of Opto-electronics Chinese Academy of Sciences Beijing China School of Mathematical sciences Peking University Beijing China high School of Central University for Nationalities Beijing China institute of Mechanical Design Department of Precision Instruments and Mechanology Tsinghua University Beijing China

It is well-known that the numerical value is always larger than the measured value,amounting to many times,if we calculate the stress of the specimen in the impulse test using the NASTRAN and ANSYS (N-A) *** believe that the impact induces shock wave or quasi-traveling wave in the specimen,which can qualitatively explain the discrepancy of the two *** order to verify it,the Lax-Friedrichs (L-F) scheme is taken to simulate the transmission of shock wave and quasi-traveling wave in *** results show that the action area of the stress wave is small and the action time is very short,so the resulting stress and actual work are not *** addition,the distribution of the impact values obtained by the numerical simulation is in accordance with the trend of the measured impact values.

关键词： aerospace environment test shock wave quasi-traveling wave

Structural stability of infinite-layer CaCuO_2.under high pressure

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chinese Science Bulletin 2003年第12期48卷 1201-1203页

作者： QIN Xiaomei1,2. HONG Ming1,2. ZHANG Gongmu1,2. MAI Wenjie1,2. LI Fengying1,2. YU Richeng1,2. LIU Jing2.3.& JIN Changqing1,2.1. institute of {2., chinese Academy of {3., Beijing 100080, china 2. Beijing high Pressure Research Center, Beijing 100080, china 3. institute of high energy physics, chinese Academy of {3., Beijing {12., china Correspondence should be addressed to Jin Changqing (e-mail: cqjin@ ***) institute of physics Chinese Academy of Sciences Beijing 100080 China Beijing high Pressure Research Center Beijing 100080 China institute of high {2. {3. Chinese Academy of Sciences Beijing 100039 China

In situ high-pressure energy dispersive X-ray diffraction measurements on polycrystalline powder Ca-CuO2.with an infinite layer structure (IL CaCuO2. have been performed by using diamond anvil cell (DAC) instrument with synchrotron radiation. The results suggest that the crystal structure of IL CaCuO2.is stable under pressure up to {2. GPa at room temperature. According to Birch-Murn- aghan equation of state, assuming pressure derivative 4,=0Bthe bulk modulus B0=181 ?9 GPa is obtained.

关键词： infinite-layer CaCuO2 synchrotron radiation high pressure energy dispersive X-ray diffraction.

Correlation of Behavior Changes and BOLD Signal in Alzheimer-like Rat Model

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Acta Biochimica et Biophysica Sinica 2004年第12期36卷 803-810页

作者： Zheng-Hui HU#, Xiao-Chuan WANG1#, Li-Yun LI3. Mai-Li LIU3. Rong LIU1, Zhiqun LING1, Qing TIAN1, Xiao-Wei TANG, Yi-Gen WU2., and Jian-Zhi WANG1* Department of {2. and Bio-X disciplinary Laboratory, Zhejiang University, Hangzhou 3.002.,china 1 Department of Pathophysiology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 43.03., china 2.3. of high energy {2. and Key Laboratory of Nuclear Analysis Techniques, {12. Academy of sciences, P.O. Box 918, Beijing 10003., china 3.uhan {3. of {2. and Mathematics, State Key Laboratory of Magnetic Resonance and Atomic and Molecular {2., {12. Academy of sciences, Wuhan 43.071, china Department of physics and Bio-X disciplinary Laboratory Zhejiang UniversityHangzhou 310027China Department of Pathophysiology Tongji Medical College Huazhong University of Science and TechnologyWuhan 430030 China Wuhan institute of physics and Mathematics State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Chinese Academy of SciencesWuhan 430071 China institute of high {2. {3. and Key Laboratory of Nuclear Analysis Techniques Chinese Academy of SciencesP.O. Box 918 Beijing 100039 China

To explore a potential means for the early diagnosis of Alzheimer disease, we studied the relationship of resting T2. signal and tau hyperphosphorylation/spatial memory deficit. The rat model with tau hyperphosphorylation and spatial memory deficit was established by bilateral hippocampi injection of isoproterenol (IP). Then, the correlative alteration between resting T2. signal and spatial memory retention was assessed with blood oxygenation level dependent (BOLD) functional magnetic resonance imaging (fMRI) study and Morris Water Maze test, and Western blot was employed to confirm tau hyperphosphorylation. The analysis showed following results. (1) Tau phosphorylation at Ser3.6/Ser404 and Ser199/Ser2.2.was signifi- cantly increased in IP-injected rats as detected by PHF-1 and tau-1, respectively. (2. An AD-like spatial memory retention disturbance was induced at 2. h after isoproterenol injection. (3. A sensitivity threshold of resting T2. signal intensity, which separated the IP-treated rats from vehicle control, was obtained by applying linear regression analysis, and an estimated sensitivity statistical threshold was at 3..62. These results suggest that resting T2. signal may serve as a noninvasive quantitative marker in predicting AD-like spatial memory deficits and tau hyperphosphorylation.

关键词： Alzheimer disease (AD) functional magnetic resonance imaging (fMRI) isoproterenol (IP) Morris Water Maze diagnosis

Observation constraints of the hard X-ray modulation telescope HXMT

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Science china(physics,Mechanics & Astronomy) 2010年第S1期53卷 31-35页

作者： LU Yu1,2.ZHANG WenZhao3.QU JinLu1,SONG LiMing1,GAO Jian3.ZHANG HongMei4 & OU Ge4 1 Key Laboratory of Particle Astro{2.,institute of high {3. {2.,chinese Academy of sciences,Beijing 100049,china 2.Graduate University of chinese Academy of sciences,Beijing 100049,china 3.Department of Astronomy,Beijing Normal University,Beijing 100875,china 4 Computing Center,institute of high {3. {2.,chinese Academy of sciences,Beijing 100049,china Key Laboratory of Particle Astrophysics Institute of High Energy Physics Chinese Academy of Sciences Beijing China Graduate University of chinese Academy of sciences Beijing China Department of Astronomy Beijing Normal University Beijing China Computing Center Institute of High Energy Physics Chinese Academy of Sciences Beijing China

The hard X-ray modulation telescope HXMT is a low orbit X-ray space telescope whose main science goals are to accomplish a hard X-ray all sky survey and to study timing and spectral characteristics of X-ray *** has three kinds of science instruments:the high energy X-ray detector(HE),the medium energy X-ray detector(ME) and the low energy X-ray detector(LE).The observation schedule of HXMT is a key to achieving the science goal of HXMT,and the analysis of the observation constraints is one of the first tasks in making the observation *** paper analyzes how the observation constraints influence the sky visibility and the visible time distribution of X-ray sources and discusses the schedule strategy with regard to the observation constraints.

关键词： HXMT observation constraints sky visibility

energy distributions of the large-scale horizontal currents caused by wind in the baroclinic ocean

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Science china Earth sciences 2005年第12期48卷 2267-2275页

作者： ZHOU Lei1, TIAN Jiwei1 & WANG Dongxiao2.1. Physical Oceanography Laboratory, Ocean University of china, Qingdao 2.6003. china 2. Key Laboratory of Tropical Marine Environmental Dynamics, South china Sea {3. of Oceanology, chinese Academy of sciences, Guangdong 5103.1, china Physical Oceanography Laboratory Ocean University of China Qingdao China Key Laboratory of Tropical Marine Environmental Dynamics South China Sea Institute of Oceanology Chinese Academy of Sciences Guangdong China

Ocean current data for nearly 3.months in the South china Sea (SCS), combined with the NCEP/NCAR reanalysis wind data, are analyzed. The results indicate that the wind en-ergy enters the upper mixed layer in a wide continuous frequency band. In addition, the interac-tion between the low-frequency wind anomaly and the low-frequency current anomaly is the most ‘effective’ way for the {2. input from the wind to the upper ocean. However, only the inertial and the near inertial {2. propagate downwards through the upper mixed layer. The down-ward-propagating {2. is distributed into the barotropic currents, the baroclinic currents and each mode of the baroclinic currents following the normal distributions. The {2. change ratios between the barotropic motion to the baroclinic motion induced by the wind present a normal distribution of N (0.02.2. 0.3.47). The {2. change ratios of the first 4 baroclinic modes to the whole baroclinic currents also follow the normal distributions. The first baroclinic mode follows N (0.2.2., 0.1872., the second N (0.1979, 0.1504), the third N (0.13.1, 0.163.), and the fourth N (0.0650, 0.1540), respectively.

关键词： wind anomaly, ocean current anomaly, energy transportation, wide frequency band, near-inertial fre-quency, energy distribution.

Threading dislocation density comparison between GaN grown on the patterned and conventional sapphire substrate by high resolution X-ray diffraction

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Science china(physics,Mechanics & Astronomy) 2010年第3期53卷 465-468页

作者： ZHANG YuChao1, XING ZhiGang2. MA ZiGuang2. CHEN Yao2. DING GuoJian2. XU PeiQiang2. DONG ChenMing3. CHEN Hong2.& LE XiaoYun1 1 School of physics and Nuclear {2. Engineering, Beihang University, Beijing 100190, china 2.Renewable {2. Laboratory, institute of physics, chinese Academy of sciences, Beijing 100190, china 3.School of Information and Communication, Tianjin Polytechnic University, Tianjin 3.0160, china School of physics and Nuclear energy Engineering Beihang University Beijing China Renewable energy Laboratory Institute of Physics Chinese Academy of Sciences Beijing China School of Information and Communication Tianjin Polytechnic University Tianjin China

GaN epifilms are grown on the patterned sapphire substrates (PSS) (0001) and the conventional sapphire substrates (CSS) (0001) by metal-organic chemical vapor deposition (MOCVD) using a novel two-step growth. high resolution X-ray diffraction (HR-XRD) is used to investigate the threading dislocation (TD) density of the GaN epifilms. The TD density is calculated from the ω-scans full width at half maximum (FWHM) results of HR-XRD. The edge dislocation destiny of GaN grown on the PSS is 2.7×108 cm-2. which is less than on the CSS. This is confirmed by the results of atomic force microscopy (AFM) measurement. The lower TD destiny indicates that the crystalline quality of the GaN epifilms grown on the PSS is improved compared to GaN epifilms grown on the CSS. The residual strains of GaN grown on the PSS and CSS are compared by Raman Scattering spectra. It is clearly seen that the residual strain in the GaN grown on PSS is lower than on the CSS.

关键词： GaN patterned sapphire substrate threading dislocation XRD

Possible energy Network with polygeneration system and CCS for china

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中国科学：技术科学英文版 2010年第1期53卷 33-39页

作者： GAO Lin1,LI Sheng1,2.JIN HongGuang1 & LIN Hu1 1 institute of Engineering Thermophysics,{2. Academy of {3.,Beijing 100190,china 2.Graduate School of {2. Academy of {3.,Beijing 10003.,china institute of Engineering Thermophysics Chinese Academy of Sciences Beijing China Graduate School of chinese Academy of sciences Beijing China

On basis of adopting polygeneration systems for power and alternative fuels,capturing CO2.with near zero energy penalties,and storing CO2.on sites,a new kind of energy Network can integrate energy utilization,CO2.capture,transportation and storage ***-economic analysis of this solution focusing on Inner Mongolia and the Yangtze River Delta districts had been carried with comparison to the chain method for energy utilization and CO2.*** solution can save 2..5% of energy,and reduce 3.% of total *** adoption of advanced polygeneration systems contributes 52.2. of the total saved costs,and the integration of energy utilization and CO2.sequestration in the energy Network contributes 47.8%.From the aspect of CCS,the CO2.sequestration cost in the energy Network can be as low as 12.$/t due to the lower energy penalties of capture in polygeneration systems and the combination of CO2.source and *** energy Network exhibits attractive performance on energy saving,costs reduction for CCS,which may be a promising solution for sustainable development of{12..

关键词： CO2 capture and storage energy Network polygeneration system