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Microscopic and Dynamic Rheological Characteristics of Crumb Rubber Modified Asphalt

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Journal of Wuhan University of technology(Materials science) 2010年第6期25卷 1022-1026页

作者：王岚 college of Civil Engineering Inner Mongolia University of Technology

A test for crumb rubber modified asphalt containing 2.% crumb rubber particles（30 mesh） was performed using a scanning electron microscope（SEM）.The experimental results indicate that the crumb rubber particles are evenly distributed in the *** rate sweep and shear-temperature sweep tests on the crumb rubber modified asphalt at-2.-80 ℃ using a dynamic shear rheology（DSR） instrument,were carried *** tests show that the complex modulus decreases with increasing temperature;at equivalent temperature,higher load frequencies lead to a larger complex modulus,and this value increasingly decreases as the temperature increases;the phase angle increases with temperature and decreases as the load frequency *** can be concluded that the rutting resistance limiting temperature of crumb rubber modified asphalt is 78 ℃,and the anti-fatigue limiting temperature is 16 ℃,which shows that the asphalt has preferable rutting resistance characteristics at high temperature,as well as anti-fatigue *** addition,the complex modulus master curve at different temperatures was plotted according to the time temperature equivalence principle,which allows the study of the dynamic state behavior of crumb rubber modified asphalt at a wide range of load frequency.

关键词： crumb rubber modified asphalt microcosmic characteristic rheology characteristic complex modulus phase angle

Empirical likelihood confidence regions of the parameters in a partially linear single-index model

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science china Mathematics 2005年第10期48卷 1333-1348页

作者： XUE Liugen~1 & ZHU Lixing~2.1. college of Applied sciences,Beijing University of {2.,Beijing 10002.,china 2. Department of Mathematics,Hong Kong Baptist University,Hong Kong,china 1. college of Applied sciences Beijing University of Technology 100022 Beijing China 2. Department of Mathematics Hong Kong Baptist University Hong Kong China

In this paper, a partially linear single-index model is investigated, and three empirical log-likelihood ratio statistics for the unknown parameters in the model are suggested. It is proved that the proposed statistics are asymptotically standard chi-square under some suitable conditions, and hence can be used to construct the confidence regions of the parameters. Our methods can also deal with the confidence region construction for the index in the pure single-index model. A simulation study indicates that, in terms of coverage probabilities and average areas of the confidence regions, the proposed methods perform better than the least-squares method.

关键词： partially linear single-index model, empirical likelihood, confidence region, chi-square distribution, coverage probability.

Analysis on the positioning precision of CAPS

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science china(Physics,Mechanics & Astronomy) 2009年第3期52卷 328-332页

作者： JI YuanFa1,2.& SUN XiYan1,2.1 National Astronomical Observatories, Chinese Academy of sciences, Beijing 100012. china 2.Applied science and technology college, Guilin University of Electronic technology, Guilin 541004, china 1. National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China 2. Applied science and technology {2. Guilin University of Electronic Technology Guilin 541004 China

As a newly developed satellite positioning system, the Chinese Area Positioning System (CAPS) is a typical direct sequence spread spectrum ranging system like GPS. The positioning precision of such navigation signals depends on many factors, including the pseudo-code rate, the signal to noise ratio, the processing methods for tracking loops and so on. This paper describes the CAPS link budget, the solution approach for CAPS positioning, focusing on the autocorrelation function feature of C/A code signals. The CAPS signal measurement precision is studied by the software approach together with theoretical analysis of the range resolution. Because the conventional Delay Lock Loop (DLL) is vul- nerable to the impact of noise, a narrow correlator and multiple correlators as well as the corresponding discrimination methods of phases are proposed, which improves the robustness of DLL and the code-phase resolution of the measurement. The results show that the improvement of the DLL structure and the discrimination method are the most important way to improve the ranging resolution. Theoretical analysis and experimental results show that a CAPS receiver could reach a 2.-m positioning precision by using three satellites with a supported height from an altimeter.

关键词： satellite navigation receiver narrow correlation tracking loop

Research on Negotiating Agent Development

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Wuhan University Journal of Natural sciences 2004年第5期9卷 633-637页

作者： WEI Ding-guo 1,2., PENG Hong 1 1.Department of computer science, South {2. University of technology, Guangzhou 510630, Guangdong, {2. 2.Guangdong Commercial college, Guangzhou 51032.,Guangdong, {2. Department of computer science South China University of "technology Guangzhou 510630 Guangdong. China

The paper presents a flexible and effective method of development of negotiating agents. A strategy specification, which is specified by a state chart and defeasible rules, can be dynamically inserted into an agent shell incorporating a state chart interpreter and a defeasible logic inference engine, in order to yield a desirable agent. The set of desirable criteria and rules is required to be justified with different context of the application. Key words automatic negotiation - intelligence agent - defeasible logic - state chart CLC number TP 391 Foundation item: Supported by the National Natural science Foundation of china (60173051)Biography: WEI Ding-guo (1964-), male, Associate professor, research direction: {2. network protocal etc.

关键词： automatic negotiation intelligence agent defeasible logic state chart

Photocatalytic Oxidation Kinetics of Thiophene with Nano-F^-/Fe^(3+)/TiO_2

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china Petroleum Processing & Petrochemical technology 2009年第4期11卷 48-52页

作者： Li Fatang~1 Sun Zhimin~1 Liu Ying~1 Zhao Dishun~2.Liu Ruihong~1 (1.college of science,Hebei University of science and technology,Shijiazhuang 050018 2.college of Chemical and Pharmaceutical Engineering,Hebei University of science and technology) college of science Hebei University of Science and Technology Shijiazhuang 050018 China college of Chemical and Pharmaceutical Engineering Hebei University of Science and Technology China

Photocatalytic oxidation kinetics of thiophene in n-octane/water extraction system was studied with fluorine and ferric ion codoped nano-TiO_2.nano-F^-/Fe^(3+)/TiO_2. powders used as the *** of initial concentration of thiophene and additional dosage of F^-/Fe^(3+)/TiO_2.on the reaction rate constant and half-life were *** results showed that the appropriately added dosage of F^-/Fe^(3+)/TiO_2.was 0.1 g in the 100-mL reaction system and the photooxidative kinetics of thiophene in the presence of F^-/Fe^(3+)/TiO_2.catalyst was of first-order with a rate constant of 0.6508 h^(-1) and a half-life of 1.0651 *** desulfurization rate of thiophene was 98.1%in 5 h and the sulfur content could be reduced from 800 ppm to 15 *** reaction rate constant increased with a decreasing initial concentration of thiophene.

关键词： desulfurization thiophene nano-F^-/Fe^(3+)/TiO_2 photocatalytic oxidation kinetics

Stability of multiquadric quasi-interpolation to approximate high order derivatives

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science china Mathematics 2010年第4期53卷 985-992页

作者： MA LiMin 1,2.& WU ZongMin 1,1 Shanghai Key Laboratory for Contemporary Applied Mathematics,School of Mathematical sciences,Fudan University,Shanghai 2.0433,china 2.Department of Information and {2. science,zhejiang Gongshang University,hangzhou 310018,china 1. Shanghai Key Laboratory for Contemporary Applied Mathematics School of Mathematical Sciences Fudan University Shanghai 200433 China2. Department of Information and Computer Science Zhejiang Gongshang University Hangzhou 310018 China

Numerical simulation of the high order derivatives based on the sampling data is an important and basic problem in numerical approximation,especially for solving the differential equations *** classical method is the divided difference ***,it has been shown strongly unstable in ***,it can only be used to simulate the lower order derivatives in *** simulate the high order derivatives,this paper suggests a new method using multiquadric *** stability of the multiquadric quasi-interpolation method is compared with the classical divided difference ***,some numerical examples are presented to confirm the theoretical *** theoretical results and numerical examples show that the multiquadric quasi-interpolation method is much stabler than the divided difference *** property shows that multiquadric quasi-interpolation method is an efficient tool to construct an approximation of high order derivatives based on scattered sampling data even with noise.

关键词： numerical differential radial basis functions (RBFs) Hardy’s multiquadric (MQ) quasiinterpolation divided difference method white noise expectation variance

Corrosion of Different Materials in Combustion Chamber of Yellow Phosphorus Tail Gas in Industrial Boiler

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Journal of Wuhan University of technology(Materials science) 2010年第1期25卷 53-57页

作者：郜华萍宁平 college of Environmental science & Engineering Kunming University of Science and Technology

The corrosion of materials in combustion chamber of yellow phosphor tall gas was investrgated. The results reveal that the corrosion behavior is different for different materials under actual work conditions.

关键词： yellow phosphorus tail gas corrosion industrial boiler carbon metal material

Interactive group decision making procedure based on uncertain multiplicative linguistic preference relations

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Journal of Systems Engineering and Electronics 2010年第3期21卷 408-415页

作者： Zeshui Xu1,2.1.college of Economics and Management,Southeast University,Nanjing 2.0096,P.R.china 2.Institute of {2.s,University of {2. and technology of the PLA,Nanjing 2.0007,P.R.china college of Economics and Management Southeast UniversityNanjing 210096P.R.China Institute of sciences University of Science and Technology of the PLANanjing 210007P.R.China

Group decision making problems are investigated with uncertain multiplicative linguistic preference *** unbalanced multiplicative linguistic label set is introduced,which can be used by the experts to express their linguistic preference information over *** uncertain linguistic weighted geometric mean operator is utilized to aggregate all the individual uncertain multiplicative linguistic preference relations into a collective one,and then a simple approach is developed to determine the experts＇ weights by utilizing the consensus degrees among the individual uncertain multiplicative linguistic preference relations and the collective uncertain multiplicative linguistic preference ***,a practical interactive procedure for group decision making is proposed based on uncertain multiplicative linguistic preference relations,in which a possibility degree formula and a complementary matrix are used to rank the given ***,the proposed procedure is applied to solve the group decision making problem of a manufacturing company searching the best global supplier for one of its most critical parts used in assembling process.

关键词： group decision making uncertain multiplicative linguistic preference relations unbalanced multiplicative linguistic label set consensus degree interaction.

Boundary conditions for the bending of a piezoelectric beam

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science china(Physics,Mechanics & Astronomy) 2008年第7期51卷 847-856页

作者： GAO Yang1, XU SiPeng2.& ZHAO BaoSheng3 1 college of science, {2. Agricultural University, Beijing 100083, {2. 2.college of Engineering, Ocean University of {2., Qingdao 2.6071, {2. 3 School of Mechanical Engineering, University of science and technology Liaoning, Anshan 114044, {2. 1. college of science China Agricultural University Beijing 100083 China 2. college of Engineering Ocean University of China Qingdao 266071 China 3. School of Mechanical Engineering University of Science and Technology Liaoning Anshan 114044 China

For beam bending in transversely isotropic piezoelectric media, the reciprocal theorem and the general solution of piezoelasticity are applied in a novel way to obtain the appropriate stress and mixed boundary conditions accurate to all orders for the beam of general edge geometry and loadings. By generalizing the method developed by Gregory and Wan, a set of necessary conditions on the edge-data for the existence of a rapidly decaying solution is established. The prescribed edge-data of the beam must satisfy these conditions in order that they could generate a decaying state within the beam. When stress and mixed conditions are imposed on the beam edge, these decaying state conditions for the case of bending deformation of piezoelectric beam are derived explicitly. They are then used for the correct formulation of boundary conditions for the beam theory solution (or the interior solution). Besides, an analytical solution of elastic beam is formulated to verify validity of our boundary conditions. For the stress data, our boundary conditions coincide with those obtained in conventional forms of beam theories. More importantly, the appropriate boundary conditions with two sets of mixed edge-data are obtained for the first time.

关键词： boundary conditions beam bending piezoelectric media decaying states regular states