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Biore mediation: A review of applications and problems to be resolved

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Progress in Natural Science:materials international 2004年第11期 1-8页

作者： ZHOU Qixing* and HUA Tao(Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, chinese academy of sciences, shenyang 110016, China) KeyLaboratoryofTerrestrialEcologicalProcess InstituteofAppliedEcologyChineseAcademyofSciencesShenyang110016China

This review article describes the factors affecting bioremediation processes including: goals of bioremediation and the optimal ecological conditions required; inoculation of microorganisms; co-metabolism; bioavailability and its improvement; biological evolution and its utilization; monitoring and control of bioremediation processes; identification of bioremediation effectiveness and ecological remediation and its key elements. The current progress in bioremediation techniques is summarized. The direction of future development, research and applications is also examined.

关键词： polluted environment bioremediation ecological process new research progress.

The Effect of Substrate on Properties of Anodic Coatings Formed on Mg and Mg Alloys

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The Effect of Substrate on Properties of Anodic Coatings For...

Fifth international Conference on Surface Engineering

作者： R.F.Zhang1 2.D.Y.Shan2.E.H.Han2.1 Jiangxi Key Laboratory of Surface Engineering Jiangxi Science and Technology Normal University Nanchang Jiangxi 330013 China 2.Environmental Corrosion center Institute of Metal Research chinese {2. of sciences shenyang Liaoning 110016 China

Because of low mechanical strength,pure magnesium has limited applications and is usually alloyed with some elements such as aluminum,manganese,zinc and rare earth in order to improve its mechanical properties and/or corrosion *** so,appropriate surface treatment methods need to be used to further improve its corrosion resistance prior to *** on the conventional anodic oxidation,micro arc oxidation is developed and widely used to fabricate a protective coating on valve metals including magnesium *** paper reports our work on micro arc oxidation on Mg *** magnesium,AZ91HP and Mg-Li were separately anodized to investigate the effects of substrates on anodizing time,surface morphology,thickness and *** was found that the anodizing processes and coating properties were strongly affected by the alloy *** behavior of voltage with time indicated that reaching the same final voltage under the same electric parameters,anodizing time for AZ91HP was the shortest and Mg-Li the *** uniformity of anodic coatings obtained on AZ91HP was the best and Mg-Li the *** pores formed on AZ91HP and pure magnesium were generally circular with diameter 2.μm-4 μm and 3 μm-6 μm,respectively;the maximum pores on the former and the latter were separately 7 μm and 8 μm in ***,for anodic coatings formed on Mg-Li,the pore shape was not regular with both rectangle and round *** rectangle pores were 2.μm-10 μm in length and a large pore sometimes contained several small *** coatings formed on pure magnesium,AZ91HP and Mg-Li were separately 18 μm,16 μm and 2. μm *** with pure magnesium,aluminium slightly decreased the coating thickness and lithium evidently thickened the thickness of anodic *** by EDX,the phosphorus content of anodic coatings on Mg-Li was the highest and that on AZ91HP the *** coatings formed on Mg-Li contained 39.39 % phosphorus,higher than those on

关键词： magnesium alloy anodic coatings substrate effect

准二维电荷密度波导体钾紫青铜K_xMo_6O_(17)单晶样品的制备

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物理学报 2004年第3期53卷 895-899页

作者：王俊峰熊锐余恒李慧汤五丰余祖新石兢田德诚田明亮张裕恒武汉大学物理科学与技术学院武汉430072 中国科学技术大学结构分析中心合肥230026

采用碳酸盐替代高钼酸盐电解还原的方法成功制备出了准二维电荷密度波导体钾紫青铜单晶 .通过x射线衍射、透射电子显微术等方法对单晶进行结构分析表明 :晶胞参数a =b =0 5 5 4 0nm ,c =1 35 0 8nm ,单晶为三角晶系 ,对称群为P3- .电... 详细信息

采用碳酸盐替代高钼酸盐电解还原的方法成功制备出了准二维电荷密度波导体钾紫青铜单晶 .通过x射线衍射、透射电子显微术等方法对单晶进行结构分析表明 :晶胞参数a =b =0 5 5 4 0nm ,c =1 35 0 8nm ,单晶为三角晶系 ,对称群为P3- .电阻温度关系曲线的测量显示 :钾紫青铜KxMo6 O1 7单晶在

关键词：钾紫青铜电荷密度波 Peierls相变钼酸钾单晶 X射线衍射结构分析晶胞参数

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ZrO2.strengthened NiAl/Cr(Mo,Hf) composite fabricated by powder metallurgy

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Progress in Natural Science:materials international 2012年第3期22卷 231-236页

作者： L.Y. Sheng a,b, J.T. Guo c, T.F. Xi a,b, B.C. Zhang c, H.Q. Ye c a PKU-HKUST ShenZhen-Hong Kong Institution, Shenzhen 518057, China b College of Engineering, Peking University, Beijing 100871, China c Institute of Metal Research, chinese academy of sciences, shenyang 110016, China [a] PKU-HKUST ShenZhen-Hong Kong Institution Shenzhen 518057 China [b] College of Engineering Peking University Beijing 100871 China [c] Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

The ZrO2.ceramic particles strengthened NiAl/Cr(Mo,Hf) composite was fabricated from the rapidly solidified NiAl/Cr(Mo,Hf) pre-alloyed powder and the ZrO2.powder by powder metallurgy technique. Microstructure examination revealed that in the prepared composite NiAl and Cr(Mo) phases distributed at the eutectic cell boundary become coarse but many Cr(Mo) platelets inside the eutectic cell were broken, which was different from the original powder. Moreover, fine Ni2.lHf and Hf solid solution particles distributed uniformly in the composite, and the ZrO2.particles mainly segregated along eutectic cell boundary. In addition, twin crystal and stacking faults were observed inside of ZrO2.grains. The experimental results showed that the ZrO2.ceramic particles strengthened NiAl/Cr(Mo,Hf) composite exhibited better room temperature and high temperature mechanical properties than the NiAl/Cr(Mo,Hf) alloy, which may be attributed to the fine structure and the strengthening effect of ZrO2.particles.

关键词： NiAl intermetallics NiAl/Cr(Mo) composite Powder metallurgy ZrO2.strengthening

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沈阳市郊耕地土壤交换性锰含量的空间变异性

土壤 2004年第1期36卷 61-64,80页

作者：姜勇张玉革梁文举闻大中中国科学院沈阳应用生态研究所沈阳110016 沈阳市农业技术推广站沈阳110034

利用地统计学和地理信息系统相结合的方法研究了沈阳市郊耕地1994个样本0～2. cm耕层土壤交换性锰(Mn)含量的空间变异特征,编制了交换性Mn含量的空间分布图.结果表明:土壤交换性Mn含量基本符合正态分布,变异函数的最佳理论模型为球状模... 详细信息

利用地统计学和地理信息系统相结合的方法研究了沈阳市郊耕地1994个样本0～2. cm耕层土壤交换性锰(Mn)含量的空间变异特征,编制了交换性Mn含量的空间分布图.结果表明:土壤交换性Mn含量基本符合正态分布,变异函数的最佳理论模型为球状模型,交换性Mn含量具有中等的空间相关性,空间自相关距离为12.42.km, 分维数D为1.69,由随机性因子引起的空间变异占36.6 %,由结构性因子引起的空间变异占63.4 %. Kriging内插图显示出交换性Mn的空间异质性主要受成土母质和土壤类型等结构性因子的影响.

关键词：交换性锰土壤空间变异地统计学 GIS

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Robust Algorithm for Detecting the Maximum Inscribed Circle

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Robust Algorithm for Detecting the Maximum Inscribed Circle

2.07 10th IEEE international Conferences on Computer Aided Design and Computer Graphics(CAD/Graphics 2.07)

作者： Renbo Xia,Weijun Liu,Jibing Zhao,Hongyou Bian,Fei Xing (Advanced Manufacture Lab,shenyang Institute of Automation,chinese {2. of sciences,shenyang,China,110016)

In this paper,we propose a new robust algorithm for the detection of the maximum inscribed circles (MIC) in *** first use a vector distance transformation (VDT) strategy to create a distance ***,we globally search the maximal value in distance field to extract the medial ***,we give a procedure to determine the center and radius of *** experimental results show indeed that new algorithm is capable of detecting the MIC with excellent accuracy and high efficiency under various image conditions.

关键词： image Robust Algorithm for Detecting the Maximum Inscribed Circle

Modeling Microstructural Evolution under the Influence of Thermosolutal Convection During Ingot Solidification Process

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Modeling Microstructural Evolution under the Influence of Th...

The Fourth international Conference on Physical and Numerical Simulation of materials Processing (ICPNS’2.04)

作者： Qiang LI, Chunli MO, Dianzhong LI and Bainian QIAN Institute of Metal Research, chinese academy of sciences, shenyang, P.R.China, {2.

A model combined both macroscopic transport and microstructural evolution is applied to describe the influence of thermosolutal convection on microstructural evolution during the solidification process. Firstly, the volume average method and SIMPLER algorithm are used to solve the macroscopic transport equation. Then the calculated results are incorporated into the cellular automaton (CA) model to simulate the microstructural evolution. Using this model, a simple casting ingot is applied to simulate microstructural evolution. Through the simulation, it is found the thermosolutal convection has a strong influence on the redistribution of temperature field and solute field, which influence the solidification microstructural evolution.

关键词： Modeling Thermosolutal convection CA Microstructural evolution

A Study on Corrosion Behavior of Cr-Al-N Coatings Deposited by Reactive Magnetron Sputtering

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A Study on Corrosion Behavior of Cr-Al-N Coatings Deposited ...

Fifth international Conference on Surface Engineering

作者： Shuwang Duo1 Ming Zhu2.Meishuan Li3 1 Jiangxi Key Laboratory of Surface Engineering Jiangxi Normal University of Science & Technology Nanchang 330013 China 2.Dept.of Material Science and Engineering Xi’an University of Science & Technology Xi’an 710054 China 3 shenyang National Laboratory for materials Science Institute of Metal Research {2. academy of sciences shenyang 110016 China

CrN and Cr-Al-N coatings were deposited on glass substrate and the corrosion behavior of them was *** electrochemical tests using both DC（polarization curves） and AC techniques（EIS） were carried out on Potentiostat/Galvanstat（EG＆G） in the 3.5 wt% NaCl *** surface morphologies of the Cr-Al-N coatings with different aluminum content after corrosion tests were no obvious differentiations of the morphologies between pre-corrosion and after-corrosion except that spallation was observed on the surface of the CrN *** being immersed into NaCl solution for 1 hour,the mass of the coating kept constant with the time *** can be explained by the passivation of the *** comparison between Ecorr for the Cr-Al-N coatings with different aluminum content revealed that the corrosion potentials for the aluminum contain coatings were nobler than that for CrN *** meant that the addition of aluminum shifted Ecorr to more positive potential *** these coatings,CrN in NaCl solution exhibited the worst corrosion resistance,while the corrosion resistance of Cr0.63Al0.37N in NaCl solution was the *** polarization data and EIS data suggest that addition of aluminum can improve the corrosion resistance of CrN coating.

关键词： Magnetron sputtering Cr-Al-N coatings Corrosion behavior

Effect of Nd on Microstructures and Properties of AZ31 Wrought Mg Alloy

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Effect of Nd on Microstructures and Properties of AZ31 Wroug...

Second international Conference on Magnesium(ICM 2.06)

作者： Wei Qiu Enhou Han and Lu Liu Environmental Corrosion center, Institute of Metal Research, chinese academy of sciences.{2., 110015,China {2. National Laboratory for Material Science, Institute of Metal Research, chinese academy of sciences.{2.,110015,Chinia

Addition of RE elements to Al-containing Mg alloys can improve properties of Mg alloys at elevated temperatures. In the present investigation, hot-extruded AZ31+x%Nd. (x=0.1,0.3,0.6and 1.0 wt%) wrought Mg alloy were prepared .The effects of Nd on microstructures and mechanical properties at room temperature of new alloy were investigated. The investigation found that Nd can bring about two kind of precipitation phases . One is AlNd phase, the other is AlNdMn phase, which were identified as Al11Nd3 and Al8NdMn4 by X-ray diffraction and TEM.

关键词： AZ31, Mg alloy, Nd elements, Extrusion, Mechanical properties