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Effect of Heating Rate Before Tempering on Reversed Austenite in Fe-9Ni-C Alloy

第一届硒与环境和人体健康国际会议

作者： Y.Yang J.T.Mei J.Z.Chen G.Ling X.H.Yuan and s.w.lu~* national engineering research center for catalysis Dalian Institute of Chemical Physics Chinese Academy of sciences 457 Zhongshan Road Dalian Liaoning 116011 China.

＜正＞Introduction Unsymmetric ureas,which contain peptide bond （-CONH-）,are usually bioactive and widely used as herbicides,agrochemicals,and pharmaceuticals. However,industrial production processes of the chemicals involve highly toxic and corrosive *** carbonylation reactions with carbon monoxide（CO） are extensively investigated nowadays and seem to be promising alternative substitute for the phosgene ***, noble metals（such as rhodium,ruthenium,and palladium） are utilized as the ***, elemental selenium（se） was reported to catalyze the carbonylation reaction of nitro- or amino-compounds in recent *** we present our research results on the use of redox carbonylation of nitroarenes and amines to synthesize unsymmetric ureas in one pot.

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Journal of Iron and steel research International 2012年第9期19卷 73-78页

作者： ZHANG Kun , TANG Di , wU Hui-bin ( national engineering research center of Advanced Rolling , University of science and Technology Beijing , Beijing 100083 , China ) national engineering research center of Advanced Rolling University of Science and Technology Beijing Beijing China

The alloy was reheated to 580℃ for tempering at rates of 2 , 5 , 10 , 20 , and 40℃ / s , respectively , after *** amount , distribution , and stability of reversed austenite were investigated by X-ray diffraction ( XRD ) and electron back scatter diffraction ( EBsD ) .The microstructure and cryogenic impact energy were studied by scanning electron microscope ( sEM ), transmission electron microscope ( TEM ) and Charpy V-notch ( CVN ) *** results showed that when the sample was heated at 10℃ / s , the volume fraction of reversed austenite exhibited maximum of 8% ; the reversed austenite was uniform along all kinds of boundaries ; the reversed austenite contained higher concentration of carbon which enabled it to be more *** cryogenic toughness of the alloy was greatly improved when heated at 10℃ / s , as the fracture surface observation showed that it mainly fractured in ductile rupture mode , which was consistent with the results of cryogenic impact energy.

关键词： 9Ni steel heating rate reversed austenite cryogenic toughness

GENERATION AND APPLICATION OF VARIATIONAL GEOMETRIC CONsTRAINTs NETwORK BAsED ON IsO's FEATURE

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Chinese Journal of Mechanical engineering 2002年第4期15卷 319-323页

作者： Hu Jiestate CIMs engineering research center, Tsinghua University, Beijing 100084, Chinawu Zhaotong Zhejiang University state CIMs engineering research center Tsinghua University Beijing 100084 China

The concept of variantional geometric constraints network is presented. Basedon IsO's feature, three kinds of variational geometric constraints are defined. The concepts ofmate tree (MT) and loop circuit (LC) are presented. The generation method of well-constrainedvariational geometric constraints network (VGCN) is studied. The network can be applied ingeneration of well-constrained tolerance types and tolerance chains. A simple example is analyzed toshow the scheme to be effective.

关键词： IsO's feature variational geometric constraint tolerance

research on stability of the accumulated rock-soil body of reservoir bank under rainfall condition

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science China(Technological sciences) 2009年第9期52卷 2528-2535页

作者： GU Chongshi1,2,wU HaiZhen1,2 & sU HuaiZhi1,2 1 College of water Resources and Hydropower engineering,Hohai University,Nanjing 210098,China 2 national engineering research center of water Resources Efficient Utilization and engineering safety,Hohai University,Nanjing 210098,China 3 Jiangxi water Conservancy research Institute,Nanchang 330029,China College of water Resources and Hydropower engineering Hohai University national engineering research center of water Resources Efficient Utilization and engineering safety Hohai University Jiangxi water Conservancy research Institute

The shear strength parameters property of rock-soil aggregates in embankment slope of reservoir,that is,the relationship between cohesion and gravel content,between friction angle and gravel content,and the relationship between cohesion and water content,between friction angle and water content,is studied based on the direct shear test results,the shear strength change law of the rock-soil aggregates is given,and the unsaturated shear strength formulation of rock-soil aggregates that could consider suction and saturation degree influence is put forward in this paper,through which the sliding or failure physical mechanism of this type of slope under the condition of rainfall infiltration is studied. Also the 3D unsteady saturated-unsaturated seepage field and its FEM resolving mode are established based on the analysis of the slope rainfall infiltration process. Case study with this method indicates that the minimum safety factor of the accumulated rock-soil aggregates dose not arrive at the moment of rainfall cessation,but appears several hours after the rainfall cessation,this phenomenon is in accordance with the practical slope engineering's failure process and could explain appropriately the slope failure caused by rainfall infiltration. research results in this paper have an important reference value for the research on stability of the accumulated rock-soil aggregates in embankment slope of reservoir,and can enrich the stability analysis method and relevant theory of reservoir embankment slope.

关键词： reservoir bank slope rock-soil aggregates rainfall infiltration saturated/unsaturated seepage

An immune-theory-based model for monitoring inter-domain routing system

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science China(Information sciences) 2012年第10期55卷 2358-2368页

作者： GUO Yi & wANG ZhenXing national Digital switching system engineering & Technological R&D center,Zhengzhou 450002,China national Digital switching system engineering & Technological R & D center Zhengzhou China

The inter-domain routing system faces many serious security threats because the border gateway protocol(BGP) lacks effective security ***,there is no solution that satisfies the requirements of a real *** address this problem,we propose a new model based on immune theory to monitor the inter-domain routing *** introduce the dynamic evolution models for the "self" and detection cells,and construct washout and update mechanisms for the memory detection ***,borrowing an idea from immune network theory,we present a new coordinative method to identify anomalous nodes in the inter-domain routing *** this way,the more nodes working with their own information that join the coordinative network,the greater is the ability of the system to identify anomalous nodes through evaluation between *** it is not necessary to modify the BGP,the ITMM is easy to deploy and inexpensive to *** experimental results confirm the method’s ability to detect abnormal routes and identify anomalous nodes in the inter-domain routing system.

关键词： border gateway protocol inter-domain route immune theory anomalous node coordinative identification

Polynomial analysis of canopy spectra and biochemical component content inversion

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science China Earth sciences 2005年第10期48卷 1780-1791页

作者： YAN Chunyan1, LIU Qiang1, NIU Zheng1, wANG Jihua2, HUANG wenjiang2 & LIU Liangyun 2 1. state Key Laboratory of Remote sensing science, Jointly sponsored by the Institute of Remote sensing Applications of Chinese Academy of sciences and Beijing Normal University, Beijing 100101, China 2. national engineering research center for Information Technology in Agriculture, Beijing 100089, China Jointly sponsored by the Institute of Remote sensing Applications of Chinese Academy of sciences and Beijing Normal University national engineering research center for Information Technology in Agriculture

A polynomial expression model was developed in this paper to describe directional canopy spectra, and the decomposition of the polynomial expression was used as a tool for re-trieving biochemical component content from canopy multi-angle spectra. First, the basic formula of the polynomial expression was introduced and the physical meaning of its terms and coeffi-cients was discussed. Based on this analysis, a complete polynomial expression model and its decomposition method were given. By decomposing the canopy spectra simulated with sAILH model, it shows that the polynomial expression can not only fit well the canopy spectra, but also show the contribution of every order scattering to the whole reflectance. Taking the first scattering coefficients a10 and a01 for example, the test results show that the polynomial coefficients reflect very well the hot spot phenomenon and the effects of viewing angles, LAI and leaf inclination angle on canopy spectra. By coupling the polynomial expression with leaf model PROsPECT, a canopy biochemical component content inversion model was given. In the simulated test, the canopy multi-angle spectra were simulated by two different models, sAILH and 4-sCALE re-spectively, then the biochemical component content was retrieved by inverting the coupled polynomial expression + PROsPECT model. Results of the simulated test are promising, and when applying the algorithm to measured corn canopy multi-angle spectra, we also get relatively accurate chlorophyll content. It shows that the polynomial analysis provides a new method to get biochemical component content independent of any specific canopy model.

关键词： polynomial expression, canopy spectra, decomposition, biochemical component content, inversion.

Game model of safety monitoring for arch dam deformation

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science China(Technological sciences) 2008年第S2期51卷 76-81页

作者： sU HuaiZhi1,2,wU ZhongRu1,2,GU YanChang1,2,HU Jiang1 & wEN ZhiPing3 1 College of water Conservancy and Hydropower engineering,Hohai University,Nanjing 210098,China 2 national engineering research center of water Resources Efficient Utilization and engineering safety,Nanjing 210098,China 3 Department of Computer engineering,Nanjing Institute of Technology,Nanjing 210013,China College of water Conservancy and Hydropower engineering Hohai University Nanjing China national engineering research center of water Resources Efficient Utilization and engineering safety Nanjing China Department of Computer engineering Nanjing Institute of Technology Nanjing China

Arch dam deformation is comprehensively affected by water pressure,temperature,dam's structural behavior and material properties as well as other *** them the water pressure and temperature are external factors(source factors) that cause dam deformation,and dam's structural behavior and material properties are the internal factors of deformation(resistance factors).The dam deformation is the result of the mutual game playing between source factors and resistance ***,resistance factors of structure and materials that reflect resistance character of arch dam structure are introduced into the traditional model,where structure factor is embodied by the flexibility coefficient of dam body and the maximum dam height,and material property is embodied by the elastic modulus of *** the basis of analyzing the correlation between dam deformation and resistance factors,the game model of safety monitoring for arch dam deformation is put forward.

关键词： arch dam deformation monitoring model flexibility coefficient game theory

RADIAL EXTRUsION PROCEss BY THREE-DIMENsIONAL RIGID-PLAsTIC FEM sIMULATION

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中国有色金属学会会刊：英文版 1997年第4期7卷 48-52页

作者： Chen Jun, Peng Yinghong, Zuo Xu, Ruan Xueyu national Die & Mold CAD engineering research center, shanghai Jiao Tong University, shanghai 200030

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关键词： radial extrusion three dimensional rigid plastic FEM numerical simulation

synthesis and Characteristics of Organic Bentonite Gel

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Journal of wuhan University of Technology(Materials science) 2006年第1期21卷 92-94页

作者：雷东升 College of Resource and Environment engineering Wuhan University of Technology Wuhan 430070 ChinaNational Engineering Research Center of Non-metallic Minerals for Further ProcessingSuzhou 215004China

The bentonite was modified using Ca-bentonite as a matrix and octadecyl/ hexndecyl ammonium chloride as the cover agent, based on hydrothermal process. The organic gel with 5.0 Pa· s viscosity was synthesized by dispersing it into the dimethyl benzene- methyl alcohol system fully. The optimum process conditions for organic modification were that the coating agent dosage is 22g/ L, reaction time is 90 minutes and the pH value of pulp is 10. X-ray diffraction （ XRD ） analysis indicates that the d （001） value of the modified bentonite is 20. 532 A. The influence of gel temperature on its viscosity characteristic was studied. By analyzing the transmssion electron microscopy （TEM） images and observing the dispersed gel, the nanometer effect of the organic gel was discussed.

关键词： bentonite organic gel synthesis viscosity nanometer effect