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STUDY ON PROPERTIES OF RECLAIMED SODIUM SILICATE SAND

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Chinese Journal of Mechanical engineering 1998年第3期11卷 49-53页

作者： Zhao Guoping Jiang Zongyu department of Materials engineering,{2. university of science and Technology jiangsu Univ of science and Technology Jiangsu China

SEM shows that flowers and plants like sodium carbonate exists on the surface of sodium silicate sand grains when hardened by carbon dioxide, baculiform sodium acetate exists not only on sand surface but also inside sodium silicate film when hardened by ester method. The strength of sodium silicate sand mainly depends on the point bridge connecting strength of dewatered sodium silicate film. The performance of reclaimed sodium silicate sand is determined by the extent of which salinous crystal is eliminated and reasonableness of relevant technological methods.

关键词： Sodium silicate sand Structure Reclamation

MICROPLASTIC DEFORMATION BEHAVIOUR OF STEEL 1Cr18Ni9Ti

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Acta Metallurgica Sinica(English Letters) 1990年第9期3卷 191-195页

作者： ZHU Ping ZHANG Lining southeast university,nanjing,{2. ZHANG Lining Professor,department of Materials science and engineering.southeast university,nanjing 2.0018,{2.

The regularity and mechanism of the microplastic deformation of steel 1Cr18Ni9Ti both solu- tion-treated and prestrained were *** the different stages of microplastic deformation,stage 1 corresponds to the dislocation moving and exhausting in the regions near grain *** 2.being the early stage of macroplastic deformation,corresponds to the extensive operation and generation of dislocations in the interior of grains and also dislo- cation emission from the grain *** regularities of the effect of prestrain on macro-and micro-yield strength are different.

关键词： microplasticity 1Cr18Ni9Ti dislcoation

Sorption behavior of U(VI), ^(2.4)U(VI) and ^(2.8)U(VI) onto fracture-filling clays in Beishan granite, Gansu: Application to selecting the site of high-level radwaste repository in china

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science china Earth sciences 2005年第10期48卷 1649-1655页

作者： MIN Maozhong1,2. LUO Xingzhang3, WANG Ju4, JIN Yuanxin4 & WANG Rucheng1 1. department of Earth sciences, State Key Laboratory of Mineral Deposit Research, {2. university, {2. 2.0093, china 2. Center of Materials Analysis, {2. university, {2. 2.0093, china 3. department of Environmental science and {12., {2. university, {2. 2.0093, china 4. Beijing Geology Institute, Nuclear Industry, Beijing 10002., china nanjing university Nuclear Industry

The first results of sorption experiments of U(VI), 2.4U(VI) and 2.8U(VI) onto original (unpurified) fracture-filling clays from No.1 monzonitic granite intrusion, Beishan area, Gansu Province, china are reported. The monzonitic granite intrusion is a potential location for a high-level radwaste (HLW) repository in china. The present experimental results show that the maximum U(VI) sorption reached 92. at near-neutral pH and the distribution coefficient (Kd) was 12.6 mL/g. A high sorption capacity of the fracture-filling clays in host rock on radioactive ele-ments is necessary for HLW deep geological disposal repository. No preferential sorption of 2.4U onto the clays was found. Finally, the sorption of U(VI) onto the clays was also modeled using a surface complexation model.

关键词： HLW geological disposal repository, granite, uranium, radionuclide, clay, sorption.

Robust H-infinity fuzzy control for uncertain Markovian jump nonlinear singular systems with wiener process

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控制理论与应用（英文版） 2010年第2期8卷 205-210页

作者： Aiqing ZHANG 1 , Huajing FANG 2.(1.College of Mathematics and computer science, Jianghan {2., Wuhan Hubei 430056, china 2.department of Control science and engineering, Huazhong {2. of science and Technology, Wuhan Hubei 430074, china) College of Mathematics and computer science Jianghan University Wuhan Hubei China department of Control science and {2. Huazhong University of Science and Technology Wuhan Hubei China

This paper deals with the problems of robust stochastic stabilization and H-infinity control for Markovian jump nonlinear singular systems with Wiener process via a fuzzy-control approach. The Takagi-Sugeno (T-S) fuzzy model is employed to represent a nonlinear singular system. The purpose of the robust stochastic stabilization problem is to design a state feedback fuzzy controller such that the closed-loop fuzzy system is robustly stochastically stable for all admissible uncertainties. In the robust H-infinity control problem, in addition to the stochastic stability requirement, a prescribed performance is required to be achieved. Linear matrix inequality (LMI) sufficient conditions are developed to solve these problems, respectively. The expressions of desired state feedback fuzzy controllers are given. Finally, a numerical simulation is given to illustrate the effectiveness of the proposed method.

关键词： Fuzzy control H-infinity control Singular systems Stochastic stability Linear matrix inequality (LMI)

Mathematic Expression of Kinetic Compensation Effect and Relationship between the Exothermic Decomposition Temperature and Critical Temperature of Thermal Explosion of Eighty-six Energetic Materials

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含能材料 2001年第1期9卷 8-9页

作者： HU Rong zu 1, YANG De suo 2. ZHANG Jiao qiang 3 (1. department of Chemistry,Northwest university, Xi′an 710065,{2. 2. department of Chemistry and Chemical engineering, Baoji College of Arts and science, Baoji 72.007,{2. 3. department of 西北大学陕西西安 710065 宝鸡文理学院陕西 721007 西北工业大学陕西西安 710072

Two relationships are established using the least squares method,between the kinetic parameters (the apparent activation energy and pre exponential constant),and the exothermic decomposition temperature and ther... 详细信息

关键词： critical temperature of thermal explosion decomposition temperature DSC energetic materials.

A new orthogonality relationship for orthotropic thin plate theory and its variational principle

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science china(Physics,Mechanics & Astronomy) 2005年第3期48卷 371-380页

作者： LUO Jianhui 1 , LONG Yuqiu 2.& LIU Guangdong 1 1. College of Civil engineering, Hunan university, Changsha 410082.{2. 2. department of Civil engineering, Tsinghua university, Beijing 100084,{2. College of Civil engineering Hunan University Changsha China department of Civil engineering Tsinghua University Beijing China

The thought how dual vectors are constructed in a new orthogonality relationship for theory of elasticity is generalized into orthotropic thin plate bending problems by using the analogy theory between plane elasticity problems and plate bending problems. Dual differential equations are directly obtained by using a mixed variables method. A dual differential matrix to be derived possesses a peculiarity of which principal diagonal sub-matrixes are zero matrixes. Two independently and symmetrically orthogonality sub-relationships are discovered. By using the integral form for elastic bending theory of orthotropic thin plate the orthogonality relationship is demonstrated. By selecting felicitous dual vectors a new orthogonality relationship for theory of elasticity can be generalized into elastic bending theory of orthotropic thin plate. By using the integral form a variational principle which is relative to differential form and a whole function expression are proposed.

关键词： theory of elasticity, thin plate theory, dual vectors, orthogonality relationship, orthotropic, variational principle.

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science china Mathematics 2004年第5期47卷 659-674页

作者： SHI Peihu & WANG Mingxindepartment of Mathematics, southeast university, {2. 2.0018, china department of Mathematics, Xuzhou Normal university, Xuzhou 2.1116, china department of Mathematics Southeast University Nanjing China department of Mathematics Xuzhou Normal University Xuzhou China

This paper is devoted to study the classification of self-similar solutions to the quasilinear parabolic equations with nonlinear gradient termsu t = Δ(u m) - uq∣Δu∣ p withm ≥ 1,p,q > 0 andp +q >m. Form = 1, it is shown that the very singular self-similar solution exists if and only ifnq + (n +1)p 2. and in case of existence, such solution is unique. Form > 1, it is shown that very singular self-similar solutions exist if and only if 1 2.andnq + (n + 1)p 2.+mn, and such solutions have compact support if they exist. Moreover, the interface relation is obtained.

关键词： quasilinear parabolic equations, self-similar solutions, very singular solution, classification.

Diophantine vectors in analytic submanifolds of Euclidean spaces

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science china Mathematics 2007年第9期50卷 1334-1338页

作者： Rong-mei CAO~(1+) Jian-gong YOU~2.1 College of science,nanjing {2. of Aeronautics and Astronautics,nanjing 2.0016,china 2.department of Mathematics,nanjing {2.,nanjing 2.0093,china College of science Nanjing University of Aeronautics and Astronautics Nanjing China department of Mathematics Nanjing University Nanjing China

Let $\mathcal{M}$ be an m-dimensional analytic manifold in ? n . In this paper, we prove that almost all vectors in $\mathcal{M}$ (in the sense of Lebesgue measure) are Diophantine if there exists one Diophantine vect... 详细信息

关键词： diophantine vector analytic submanifold 32.05

Research on nonlinear constitutive relationship of permanent deformation in asphalt pavements

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science china(Physics,Mechanics & Astronomy) 2006年第6期49卷 671-682页

作者： PENG Miaojuan1 & XU Zhihong2.1. department of Civil engineering,Shanghai {2.,Shanghai 2.0072.china 2. School of Transportation engineering,Tongji {2.,Shanghai 2.0092.china department of Civil engineering Shanghai University Shanghai China School of Transportation engineering Tongji University Shanghai China

To predict correctly the rut depths in asphalt pavements,a new nonlinear viscoelastic-elastoplastic constitutive model of permanent deformation in asphalt pave-ments is presented. The model combines a generalized Maxwell model with an elasto-plastic one. Then from the creep theory,the linear and nonlinear constitutive equations of the generalized Maxwell model are obtained. From the nonlinear finite element method for the rutting of the asphalt pavement,the rut depths of 4 asphalt-aggregate mixtures are obtained. And the results are compared with the ones from the finite element method by SHRP and the experiments by SWK/UN. The results in this paper are better than the ones by SHRP,and agree with the ones of the experiment by SWK/UN. This shows that the nonlinear viscoelastic-elastoplastic constitutive model,which is presented in this paper for the rutting of the asphalt pavement,is effective. The properties,such as nonlinear elastic-ity,plasticity,viscoelasticity and nonlinear viscoelasticity,which affect the rutting of an asphalt pavement,can be shown in the model. And the characteristics of the permanent deformation of the asphalt pavement can be presented entirely in the model.

关键词： asphalt pavement,permanent deformation,nonlinear viscoelastic-elastoplastic constitutive relationship,generalized Maxwell model,creep compliance.