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测量高温超导YBCO薄膜厚度的一种新方法

物理学报 2001年第8期50卷 1451-1455页

作者：张国勇张鹏翔昆明理工大学材料科学与工程系昆明650051

生长在倾斜SrTiO3 衬底上的YBCO薄膜具有激光感生电压效应 ,响应信号的衰减时间常量与薄膜的厚度有确定的关系 .作出了衰减时间常量与薄膜厚度的关系曲线 ,根据该曲线。

关键词： YBCO 激光感生电压效应时间常量薄膜厚度高温超导

WAVE PROPAGATION IN TWO-LAYERED INFINITE COMPOSITE PIEZOELECTRIC HOLLOW CYLINDER WITH IMPERFECT INTERFACES

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WAVE PROPAGATION IN TWO-LAYERED INFINITE COMPOSITE PIEZOELEC...

China’s WUB Community vs. America’s TOD Community

第三届全国压电和声波理论及器件技术研讨会

作者： Zu-guang BIAN Ningbo Institute of technology,zhejiang university,Ningbo,zhejiang 315100,China Wei-qiu CHEN,Chao-feng L Department of Civil Engineering,zhejiang university,Hangzhou,zhejiang 310027,China

The focus of this paper is to study an infinite composite hollow cylinder consisting of a homogeneous piezoelectric layer and a functionally graded elastic layer.A general linear spring-layer model is employed to characterize the interface between the two layers,which may be perfect or *** based on the three-dimensional exact equations of elasticity and piezoelasticity,the state space formulations are *** analytical characteristic equation is presented,from which the dispersion of wave propagating in the cylinder can be *** numerical examples, different modes of wave propagation and the effects of some parameters on the dispersion curves are discussed.

关键词： Piezoelectricity infinite cylinder dispersion curve imperfect interface

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China City Planning Review 2007年第4期16卷 56-61页

作者： YU Wenbo,Postdoctoral,Department of Architecture,zhejiang university Associate Professor,Department of Architecture and Planning,zhejiang university of technology,Hangzhou,P. R. China. WANG Zhu,Professor,Chair of Department of Architecture,zhejiang university,Hangzhou,P. R. China. MENG Haining,Associate Professor,Chair of Department of Architecture,zhejiang university,Hangzhou,P. R. China. Editorial Department Editorial Department

1. Critiques and reflections on WUB CommunityThe working unit system and the WUB Community, i.e., working-unit-based community, are two completely

关键词： residential housing allocation transportation loca

Photocatalytic energy storage ability of TiO_2-WO_3 composite prepared by wet-chemical technique

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Journal of Environmental sciences 2010年第3期22卷 454-459页

作者： Linglin Cao, Jian Yuan, Mingxia Chen, Wenfeng Shangguan Research Center for Combustion and Environment technology, Shanghai Jiao Tong university, Shanghai 200240, China. [a] Research Center for Combustion Environment technology Shanghai Jiao Tong University Shanghai 200240 China

TiO2-WO3 hybrid photocatalysts were prepared using wet-chemical technique, and their energy storage performance was characterized by electrochemical galvanostatic method. TiO2 powder was coupled with WO3 powder, which was used as electron pool and the reductive energy could be stored in. As a result, the prepared TiO2-WO3 had good energy storage ability while pure TiO2 showed no capacity and pure WO3 showed quite low performance. The energy storage ability was affected by the crystal structure of WO3 and calcination temperature. The photocatalyst had better capacity when WO3 had low degree of crystallinity, since its loose structure made it easier for electrons and cations to pass through. The photocatalytic energy storage performance was also affected by the molar ratio of TiO2 to WO3. Energy storage capacity was significantly dependent on the composition, reaching the maximum value at TiO2/WO3 1：1 （mol/mol）.

关键词： photocatalyst TiO2-WO3 energy storage

Description of Concrete Durability Damage Process

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Wuhan university Journal of Natural sciences 2006年第3期11卷 653-656页

作者： CHEN Yueshun WEI Jun ZHAO Xiaolong School of Civil Engineering and Mechanics Huazhong University of Science and Technology Wuhan 430074Hubei China

Based on the damage mechanics, the concrete damage grade of relative stable environment in measurable spatial is constructed in this paper, and the concrete damage evolving model and corresponding failure rule is constructed based on the damage grade fore-defined. Therefore, the concrete health status and the residual life-span can be assessed according to the mea,sured damage grade. It is propitious to drive the development of concrete durability assessment and life-span forecast. Its feasibility of concrete damage process description and health assessment is validated with the exampie in this paper, in which the damage state is described with the ultrasound velocity attenuation, and the freeze-thaw process is regarded as the concrete durability degradation influeneing factor to reflect the concrete durability degradation process.

关键词： concrete durability damage life-span assessment health monitoring ultrasonic velocity

Radioimmunoassay of Antiarrhythmic Peptide and Its application

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Journal of Huazhong university of science and technology(Medical sciences) 2003年第1期23卷 44-47页

作者：吴志坚张永学 DepartmentofNuclearMedicine XieheHospitalTongjiMedicalCollegeHuazhongUniversityofScienceandTechnology

To establish a specific and sensitive radioimmunoassay (RIA) for antiarrhythmic peptide (AAP) and study serum AAP levels in normal Sprague-Dawley rats (NR) and spontaneous hypertension rats (SHR), AAP-bovine serum albumin (BSA) conjugate was prepared by ammonium bicarbonate method. The New Zealand rabbits were immunized by administering intradermally the conjugate. Then the rabbit anti-AAP serum was produced and iodinated AAP was made by Bolton-Hunter method. The RIA for serum AAP was set up and serum AAP levels in NR and SHR were determined. The minimal detectable range of the AAP RIA was (0.45±0.06) μg/L. The affinity constant for antiserum was 1.05×10 9 L/mol, and the rate of cross-reactivity with atrial peptide (AP) and human growth hormone (hGH) were 0.12 % and 0.20 %, respectively. The mean recovery rate of high, medium and low doses was 97.6 %, and the mean coefficients of variation for intra- and interbath-assay were (6.43±0.85) % and (9.62±1.04) %, respectively. The mean levels of AAP in NR with different age (3 months, 8-10 months and 18-20 months) were (1.75±0.13) μg/L, (1.74±0.11) μg/L and (1.79±0.15) μg/L, respectively, while those in SHR with different age (3 months, 8-10 months and 18-20 months) were (2.38±0.35) μg/L, (2.54±0.25) μg/L and (2.83±0.21) μg/L, respectively. The levels of serum AAP showed a positive correlation with blood pressure (r=0.8667, P<0.05). It was indicated that this AAP RIA had high specificity, high accuracy and good reproducibility. The levels of serum AAP had a close relation with blood pressure.

关键词： antiarrhythmic peptide radioimmunoassay blood pressure spontaneous hypertension rats

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正交二元位相光栅的减反射特性

中国激光 1997年第8期24卷 699-702页

作者：张国平明海谢建平叶嘉雄中国科技大学物理系华中理工大学光学系

根据二维矢量耦合波衍射理论，分析了正交二元位相光栅的衍射特性，发现在适当选取光栅参数时，其反射率可以减小到几乎为零，并且这种减反射特性与入射光的偏振态无关。

关键词：光栅减反射偏振耦合波薄膜光学

Synthesis and Magnetostriction of (Ce_xTb_(1-x))_(0.5)Pr_(0.5)Fe_2 Compounds

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Journal of Materials science & technology 2000年第2期16卷 179-180页

作者： Yangxian LI, Guizhi XU and Jingping QU (School of Materials science and Engineering, Hebei university of technology, Tianjin 300130, China) Chengchun TANG, Guangheng WU and Wenshan ZHAN (State Key Laboratory for Magnetism, Institute of Physics, Chinese Academy of sciences, Beijing 100080, China) School of Materials science and Engineering Hebei University of Technology Tianjin 300130 China State Key Laboratory for Magnetism Institute of Physics Chinese Academy of Sciences Beijing 100080 China

The structural and magnetostrictive properties of (CexTb1-x)0.5Pr0.5Fe_2 were investigated. Ceconcentration must exceed x=0.6 in order to obtain the pure Laves phase. The magnetostriction and anisotropy constant increase with the Tb-content in this system. The anisotropy value of PrFe_2 is lower than that of isostructural DyFe_2. From the X-ray step-scanned data we found that λ_111 of PrFe_2 is 1310x10^-6. A large increase of magnetostriction can be observed under a small prestress of 6 MP_a for Ce_0.5Pr_0.5Fe_2.

关键词： Synthesis and Magnetostriction of Ce_xTb Fe2 Compounds

Ice-volcanism due to tidal stress on Europa

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Chinese science Bulletin 2003年第13期48卷 1390-1392页

作者： LI Li & CHEN Chuxin School of Earth and Space sciences, university of science andtechnology of China, Hefei 230026, China School of Earth and Space sciences University of Science and Technology of China

Tectonism would be driven by tidal heat onEuropa, and there may be ice-volcano on the surface ofactive Europa. We assume that ice-volcano would spurt out due to tidal stress, and calculate the velocity and height of t... 详细信息

关键词：潮汐应力木卫二构造作用冰山火山