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Udaan公园

景观设计 2024年第1期22卷 38-43页

作者： studio Saar(文/图) 马建军(翻译) 杨庆鑫(翻译) 不详

该项目位于印度拉贾斯坦邦乌代浦尔,由一处废弃的湖滨公园改建而成,是一个开放、安全且包容的社区公园。公园内设置了迷宫、游乐区和以当地鸟类为设计灵感的遮阳棚,绿植茂盛,让市民与游客和自然生境重新建立联系。

关键词：社区公园湖滨公园遮阳棚拉贾斯坦邦自然生境设计灵感迷宫

CONTENTS AND ABSTRACTS

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河南科技大学学报（自然科学版） 2011年第6期32卷 I0001-I0007页

作者： material Science Engineering

SYNTHESIZING KINETICS AND MICRO-CHARACTERIZATION OF SPINEL LiMn_(2)O_(4) FOR LITHIUM-ION BATTERY CATHODE material

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Acta Metallurgica Sinica(English Letters) 2001年第5期14卷 323-329页

作者： CATHODE material M.S. Zhao, Y.C. Zhai and Y.W. Tian School of material & Metallurgy, Northeastern University, Shenyang 110004, China Sch. of Mat. Metall. Northeastern Univ. Shenyang 110004 China

The reaction process during synthesis of LiMn2O4 with LiOH·H2O and MnO2 was studied by means of DTA in dynamical air atmosphere, and it could be applied as an important theoretical principle for preparing LiMn2O4. The active energies of four reaction processes were obtained with Doyle-Ozawa method and Kissinger method as follows: 66.299, 72.640, 128.11 and 113.876 kJ·mol-1, respectively. Reaction orders, frequency factors and kinetic equations of each reaction were determined by Kissinger method. XRD, SEM and TEM show that the synthesized LiMn2O4 is a pure phase, with regular appearance and higher ratio-surface.

关键词： Cathodes Inorganic compounds Kinetic theory Synthesis (chemical)

Preparation and High Temperature Oxidation Properties of Micro-crystalline MGH754 ODS Alloy Coatings

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Journal of University of Science and Technology Beijing 2001年第1期8卷 28-34页

作者： Huibub Qi Hongmei Pang Yedong He Deren Wang Wei Gao material Seience and Engineering School, University of Science and Technology Beijing, Beijing 100083, China Department of Chemical and material Engineeing, the University of Auckland, New Zealand material Science/Engineering School Univ. of Science/Technology Beijing Beijing 100083 China

A special coating technique, electro-spark deposition (ESD), was developed to produce micro-crystalline ODS MGH754 alloy coatings on a commercial 1Cr18Ni9Ti stainless steel and a cast Ni20Cr alloy substrates. The coatings have a very fine grain structure and metallurgical bonding with the substrates. The isothermal oxidation tests at 1000 degreesC in air showed that the micro-crystalline ODS alloy coatings had a much reduced oxidation rate and improved scale spallation resistance compared with the uncoated alloys. The selective oxidation of Cr was greatly promoted to form protective and continuous Cr2O3 scales on the alloy surface. Micro-crystallization and oxide dispersions have synergistic effects on the improvement of oxidation resistance. The beneficial effects were discussed based on the experimental results.

关键词： electro-spark deposition (ESD) ODS coating oxidation

Effect of Process Factors on Microstructure of Semisolid Continuous Casting Billets

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International Journal of Minerals,Metallurgy and materials 2000年第4期14卷 242-245页

作者： Shuming Xing, Qijie Zhai, Hanqi Hu ( Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China School of material Science and Engineering, Shanghai University, Shanghai 200072, China material Science and Engineering School, Univer Department of Mechanical Engineering Tsinghua University Beijing 100084 China School of material Science and Engineering Shanghai University Shanghai 200072 China material Science and Engineering School University of Science and Technology Beijing Beijing 100083 China

Semisolid continuous casting (SSCC) is a new technology to produce billets for semisolid metal forming (SSMF). The effect of process factors, such as pouring temperature, stirring rate, preheating temperature and thermal conductivity of stirring chamber, on the microstructure of SSCC billets was studied by means of the factorial experimental method. The results show that the microstructure of SSCC billets can be controlled by the above-mentioned four process factors. In order to obtain fine and rounded granular grains in an SSCC billet, the pouring temperature, preheating temperature and stirring rate should be kept in a moderate range, and the thermal conductivity of stirring chamber should be high. The regression equations with the process factors connecting the microstructure was also set up based on experimental data.

关键词： semisolid metal continuous casting process factors microstructure Metallurgy

SENSORING DROPLET SPRAY TRANSFER IN MIG WELDING BASED ON ARC SPECTRUM SIGNAL

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Chinese Journal of Mechanical Engineering 2001年第3期14卷 237-242页

作者： Liu Gang,Li Junyue,Li Huan,Fan Ronghuan (School of material Engineering, Tianjin University) 天津大学材料科学与加工自动化系天津

The method to detect droplet transfer by means of arc spectrum, while the experiment sets, testing principle and data processing procedure,are presented. The experiment and analysis results show that arc spectrum signal can be utilized to detect and measure the transfer procedure, the transfer modes and the transfer parameters. The arc spectrum signal enjoys excellent quality with high signal amplitude. Each transfer mode has its specific typical signal mode, and the pulse outline corresponds to an integrated transferring procedure of one droplet. All these features of arc spectrum signal can be easily applied hi the control of transfer procedure,the identification and stabilization of transfer mode and the measurement of transfer parameters.

关键词： MIG welding Arc spectrum Signal feature Droplet transfer Detection

Effect of Annealing Temperature on GMR of [NiFeCo(10 nm)/Ag(10 nm)]×20 Multilayer Film

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Journal of materials Science & Technology 2004年第2期20卷 179-181页

作者： Yuding HE, Shejun HU, Jian LI and Guangrong XIECollege of material and Energy, Guangdong University of Technology, Guangzhou 510643, China Coll. of Mat. and Energy Guangdong Univ. of Technol. Guangzhou 510643 China

The composition, phase structure, and microstructure of the discontinuous multilayer films [NiFeCo(10 nm)/ Ag(10 nm)]×20 annealed at temperature 280, 320, 360 and 400℃, respectively were investigated. GMR (giant magnetore-sistance) ratios of the multilayer films were measured at different temperatures. The results showed that FeNi3 precipitated at 360℃ and dissolved at 400℃. The films annealed at 360℃ for 1 h exhibited the highest GMR ratio 11% when saturation field was equal to 79.6 kA/m.

关键词： Multilayer film Annealing GMR [NiFeCo(10 nm)/Ag(10 nm)]×20

SEM in-situ Fatigue Observation on Crack Initiation and Growth from Inclusion in P/M Rene95 Superalloy

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Journal of University of Science and Technology Beijing 2001年第3期8卷 195-197页

作者： Lina Zhang, Jianxin Dong, Xishan Xie material Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China material Science and Eng. Sch. Univ. of Sci. and Technol. Beijing Beijing 100083 China

A special designed experiment was conducted for observing crack initiation and growth in P/M Rene95 superalloy under tension-tension loading by self-made SEM in-situ fatigue loading stag. Several alumina inclusion particles exposed at the specimen surface were observed carefully. During fatigue test inclusions led to cracks initiation. The cracks can be formed by two mechanisms. Generally, the cracks nucleated at the interface between inclusion and matrix. Sometimes, cracks were also formed inside the inclusion. As the increase of cycles, some cracks at the interface between inclusion and matrix broadened and propagated along the direction about 45 degrees to the loading axis. On the other hand, the cracks inside the inclusion propagated in the inclusion and towards matrix.

关键词： inclusion P/M superalloy LCF SEM in-situ fatigue

Progress in modifications and applications of fluorescent dye probe

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Progress in natural Science:materials International 2009年第1期19卷 1-7页

作者： Xuening Fei,Yingchun Gu Department of material Science and Engineering,Tianjin Institute of Urban Construction,Tianjin 300384,China Department of material Science and Engineering Tianjin Institute of Urban Construction Tianjin 300384 China

This review summarizes the labeling technology and applications of fluorescent dye probe in biology,especially the characteristics,modification and applications of cyanine *** on the currently available modification methods of fluorescent dye probe,we discuss the studies of enhancing the water-solubility,improving the degree of biocompatibility and target-labeling,increasing the sensitivity and decreasing the toxicity of fluorescent *** also give a brief introduction on the modification method,that the fluorescent dye is directly introduced onto the cell surfaces by amine derivatives or azides to intensify the transferring information of aberrant *** suggest that fluorescent dye modified with chitosan oligosaccharide can obviously increase the degree of biocompatibility and target-labeling,and decrease the degree of toxicity.

关键词： Fluorescent dye probe Cyanine dye Chitosan oligosaccharide Modification