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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第9期8卷 1366-1372页

作者： ZHANG Li-mei CHEN Wu-jun DONG Shi-lin Space Structures Research Center Shanghai Jiao Tong University Shanghai 200030 China

The cable-strut structural system is statically and kinematically indeterminate. The initial pre-stress is a key factor for determining the shape and load carrying capacity. A new numerical algorithm is presented herein for the initial pre-stress finding procedure of complete cable-strut assembly. This method is based on the linear adjustment theory and does not take into account the material behavior. By using this method,the initial pre-stress of the multi self-stress modes can be found easily and the cal-culation process is simplified and efficient also. Finally,the initial pre-stress and structural performances of a particular Levy cable dome are analyzed comprehensively. The algorithm has proven to be efficient and correct,and the numerical results are valuable for practical design of Levy cable dome.

关键词： Linear adjustment theory Cable-strut structure Initial pre-stress Levy cable dome Structural performances analysis

Potentiality of development of embryonic cell in capra hircus, which bears serially transplanted nucleus

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Chinese Science Bulletin 1995年第12期40卷 1038-1043页

作者：邹贤刚李光三王玉阁肖英达李碧荣黄国屏钟元杜淼徐少甫穆宗尧孙长美王杏龙杜福良成勇成国祥李国忠王捍东吴维芬王立康 Institute of Developmental Biology Chinese Academy of Sciences Beijing 100080 China Agricultural College Yangzhou University Yangzhou 225001China

The nuclear transplanation is one of the ideal methods for researching the correlationof nucleus and cytoplasm in a cell. And the researches on the serial nuclear trans-plantation, or the so-called recloning will be helpful for undrstanding the problem of wheth-er there exists the change of totipotency of development function in the same blastomere

关键词： goat embryonic cell serial nuclear transplantation.

Influence of Impurity Na_2O on Crystalline Structure of Cordierite Synthesized from Aluminum Sludge

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Chinese Journal of Structural Chemistry 2005年第1期24卷 29-34页

作者：于岩阮玉忠杜育红吴任平 College of Materials Science and Engineering Fuzhou University Fuzhou 350002 China

By adding small amount of TiO2, aluminum slag could be used to synthesize cor- dierite. α-Al2O3, TiO2 and dehydrated talc could generate solid solution to accelerate the solid-state reaction to form cordierite. The experimental results show that the content of cordierite increases with the increase of TiO2 added. 3.0% of TiO2 is determined to be the best amount, because all crystalline substances are converted into cordierite at this content. Philips X’pert plus software analysis shows that when the content of TiO2 is from 0 to 1.0%, cordierite has the same hexagonal structure as the single crystal and the lattice parameters change slightly; when the content of TiO2 is from 1.0 to 2.0%, the cordierite still keeps hexagonal structure but the lattice parameters change greatly; when the content of TiO2 is from 2.0 to 3.5%, the cordierite is converted from hexagonal into rhombic and the lattice parameters change accordingly.

关键词： aluminum slag TiO2 mineralizer cordierite crystalline structure

Effects of ZnO Buffer Layer Thickness on Properties of Mg_xZn_(1-x)O Thin Films Deposited by MOCVD

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Chemical Research in Chinese Universities 2005年第5期21卷 583-586页

作者： DONG Xin LIU Da-li DU Guo-tong ZHANG Yuan-tao ZHU Hui-chao YAN Xiao-long GAO Zhong-min State Key Laboratory on Integrated Optoelectronics College of Electronic Science and Engineering Jilin University Changchun 130012 P. R. China

High-quality MgxZn1-xO thin films were grown on sapphire（0001 ） substrates with a ZnO buffer layer of different thicknesses by means of metal-organic chemical vapor deposition. Diethyl zinc, bis-cyclopentadienyl-Mg and oxygen were used as the precursor materials. The crystalline quality, surface morphologies and optical properties of the Mg, Zn1-xO films were investigated by X-ray diffraction, atomic force microscopy and photoluminescence spectrometry. It was shown that the quality of the MgxZn1-xO thin films depends on the thickness of the ZnO buffer layer and an Mg, Zn1-xO thin film with a ZnO buffer layer whose thickness was 20 nm exhibited the best crystal-quality, optical properties and a flat and dense surface.

关键词： MgxZn1-xO ZnO Buffer layer Sapphire substrate MOCVD AFM

NUMERICAL MODELING OF WASTEWATER TRANSPORT AND DEGRADATION IN SOIL AQUIFER

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Journal of Hydrodynamics 2006年第5期18卷 597-605页

作者： YIN Hai-long XU Zu-xin LI Huai-zheng LI Song College of Environmental Science and Engineering Yongji University Shanghai 200092 China Shanghai Academy of Environment Sciences Shanghai 200233 China College of Environmental Science and Engineering Tongii University Shanghai 200092 China

Modeling of wastewater transport and degradation in soil aquifer is a problem of concern with regard to the optimization of design and operation of the wastewater soil treatment system. To solve this problem, three-dimensional groundwater flow and wastewater transport and degradation model was developed using MODFLOW and MT3DMS modeling. The developed model was calibrated using the Soil Infiltration Treatment System （SITS） in the Chongming island of China after considering the river-groundwater interaction and the regional geological and hydrological conditions. Using the calibrated model, the following problems with regard to the design and operation of SITS were discussed：（1） Allowable hydraulic load. The hydraulic load increases with the drop in the water level of the adjoining river, the increase in the actual soil area under operation, and the increase in the distance among the individual operation units of SITS. （2） Optimized layout of the groundwater monitoring wells. The concentration contour of the simulated contaminants is very useful to depict the typical areas that are most severely polluted and very sensitive to the peripheral environment,, thus lesser number of monitoring wells can be set up based on the model, and the goal of the accurate assessment of the influence of soil-infiltrated wastewater on groundwater can be achieved.

关键词： groundwater model wastewater soil aquifer hydraulic load

Preparation and Characterization of Nano-ZnFe_2O_4/TiO_2 Films

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Journal of Natural Gas Chemistry 2007年第1期16卷 100-105页

作者： Kejing Xu Department of Materials Science and Technology Shandong University of Technology Zibo 255091 Shandong China

The nano-ZnFe2O4/TiO2 films possess the functions of desulfurization and degradation for organic pollutants. The sols of ZnFe2O4/TiO2 were prepared by sol-gel method and coated on glass and porous ceramic by vertical coating and dipping-lift processes, respectively, and the samples were obtained after drying and sintering. The composition, appearance, absorption spectrum of the films, and the influence of the film on porous ceramic performances were analyzed using SEM, AFM, UVVis spectrometer, and mercury porosimeter, respectively, to determine the operation parameters of the multifunction porous ceramic elements for gas-purification.

关键词： sol-gel method nano-ZnFe2O4/TiO2 film porous ceramic element desulfurization degradation

RESEARCH ON PRODUCT INNOVATION DESIGN IN VIRTUAL PRODUCT DEVELOPMENT

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Chinese Journal of Mechanical Engineering 2002年第4期15卷 353-359页

作者： Wu Qunbo Zhang Linxuan Xiao Tianyuan Long Xinghai State CIMS Engineering Research Center, Tsinghua University, Beijing 100084, China State CIMS Engineering Research Center Tsinghua University Beijing 100084 China

An integrated template of virtual product development alters primarilysequential tradition mode of product life cycle. The template integrates all processes of productdevelopment using digital modem. An environment of virtual product development provides productdevelopment environment of integration, communion, network, concurrent and collaboration. Combiningdevelopment of new rapier loom, an innovated design process is researched in virtual productdevelopment, which consists three portions: constructing an integration development environment,innovation design and manufacturing simulation. The innovated design process realizes reversedesign, mechanism concept design, structural design and analysis, performance analysis andmanufacturing process simulation of virtual product, which can enhance greatly product performanceand reduce cost and development cycle of new product.

关键词： virtual product development innovation design product data management

Design and performance of a video-based laser beam automatic alignment system

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Chinese Optics Letters 2004年第2期2卷 92-94页

作者：刘代中徐仁芳范滇元 Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences National Laboratory on High Power Laser and Physics Shanghai 201800

A laser alignment system is applied to a high power laser facility for inertial confinement fusion. A design of the automated, close-loop laser beam alignment system is described. Its function is to sense beam alignment errors in a laser beam transport system and automatically steer mirrors preceding the sensor location as required to maintain beam alignment. The laser beam is sampled by a sensor package, which uses video cameras to sense pointing and centering errors. The camera outputs are fed to a personal computer, which includes video digitizers and uses image storage and software to sense the centroid of the image. Signals are sent through the computer to a stepper motor controller, which drives stepper motors on mirror mounts preceding the beam sampling location to return the beam alignment to the prescribed condition. Its optical principles and key techniques are given. The pointing and centering sensitivities of the beam alignment sensor package are analyzed. The system has been verified on the

关键词： Alignment Digital image storage Inertial confinement fusion Video cameras

Mobile Rayleigh Doppler wind lidar based on double-edge technique

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Chinese Optics Letters 2010年第8期8卷 726-731页

作者：唐磊舒志峰董吉辉王国成汪永涛徐文静胡冬冬陈廷娣窦贤康孙东松 Hyunki Cha Anhui Institute of Optics and Fine Mechanics Chinese Academy of Sciences Computer Department Anhui Finance and Trade Vocational College School of Earth and Space Sciences University of Science and Technology of China Korea Atomic Energy Research Institute

We describe a mobile molecular Doppler wind lidar （DWL） based on double-edge technique for wind measurement of altitudes ranging from 10 to 40 km. A triple Fabry-Perot etalon is employed as a frequency discriminator to determine the Doppler shift proportional to the wind velocity. The lidar operates at 355 nm with a 45-cm-aperture telescope and a matching azimuth-over-elevation scanner that provides full hemispherical pointing. To guarantee wind accuracy, a single servo loop is used to monitor the outgoing laser frequency to remove inaccuracies due to the frequency drift of the laser or the etalon. The standard deviation of the outgoing laser frequency drift is 6.18 MHz and the corresponding velocity error is 1.11 m/s. The wind profiles measured by the DWL are in good agreement with the results of the wind profile radar （WPR）. Evaluation is achieved by comparing at altitudes from 2 to 8 km. The relative error of horizontal wind speed is from 0.8 to 1.8 m/s in the compared ranges. The wind accuracy is less than 6 m/s at 40 km and 3 m/s at 10 km.

关键词： Boundary layer flow Etalons

Influence of Fe_2O_3 Impurity on the Crystalline Structure of Cordierite Synthesized from Waste Aluminum Slag

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Chinese Journal of Structural Chemistry 2005年第4期24卷 483-487页

作者： WUWei-Qing RUANYu-Zhong YUYan CollegeofMaterialsScienceandEngineering FuzhouUniversityFuzhou350002China

The influence of Fe2O3 impurity on the crystalline structure of cordierite synthesized from waste aluminum slag is discussed. XRD and SEM techniques were employed to characterize the crystalline structure and microstructure of each specimen. Philips X’pert plus software was used to determine the lattice parameters of each specimen. The results show that the Fe2O3 content of 0.8～1.6wt% is beneficial to the formation of cordierite, with the cordierite amount reaching 90wt%. So 0.8～1.6wt% is considered as the allowable Fe2O3 content in the specimens and 0.8wt% is determined to be the best after overall analysis. Plus software analysis shows that the cordierite in each specimen has the same symmetrical hexagonal structure as the single crystal, and the lattice parameters as well as the lattice dimensions change slightly.

关键词： aluminum slag cordierite Fe2O3 impurity crystalline structure