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., Dunaújváros, H-2400 3 Regional Centre of Excellence on Materials Science and Technology, Táncsics M. str. 1., Dunaújváros, H-2400 a kardos.ibolya@isd-dunaferr.hu, b tit-agepint@mail.duf.hu, c bereczkip@mail.duf.hu Keywords: quantitative metallography, microalloyed steel, austenite grain, physical simulation, austenite recrystallization Abstract.
Introduction High-strength and weldable structural steels are gaining a more-and-more wide-spread use (as base materials for pipes, bridges and steel structures).
The introduction of the thermomechanical rolling of microalloyed steel has made the costly post-heat-treatment of the base materials used for pipe manufacture unnecessary.
San Martin: Revealing austenite grain boundaries by thermal etching: advantages and disadvantages, Materials Characterization 49 (2003) 121-127
Vander Voort, Metallography Principles and Practice, McGraw-Hill Book Company, [5] Liu Qing-You et al: Austenitization behaviors of X80 pipeline steel with high Nb and trace Ti treatment, Journal of Iron and Steel Research International, 16(6), pp58-62, 2009.

Materials and Methods Porous structures were produced by powder metallurgy techniques.
Pilliar, Journal of Orthopedic Research, 19 (2002), p. 187
Jones, Surface Science Reports 42 (2001), p.75
Conf. on Advances in Materials and Processing Technologies - AMPT'99 (1999), p. 785
Cairo, Materials Research, v. 5, nº 3, (2002) p. 269.

Model for Calculating Process Variables The microstructure evolution in hot strip rolling of steel is essentially dependent on the process variables and material parameters.
Due to the effect of thermo-mechanical history and temperature variation over the material thickness direction it is important to keep track of the austenite grain size evolution throughout the given pass schedule.
The material parameters used in the simulations are given in Table 2.
Whiteman, Recrystallization and grain growth in hot rolling, Metal Science. 13 (1979) 187-193
Keife, A thermal model for the foil rolling process, Journal of Materials Processing Technology 74 (1998) 158-173

Because the recognition object is not a definite element but an overall fuzzy set, in this paper, the group recognition method is used to distinguish the thin composite materials bonding quality.
Characteristic vector The echo signal recognition of thin composite materials ultrasonic detection is researched in this paper, so feature extraction is not introduced.
The experimental results show that the fuzzy pattern recognition methods may ensure the examination classification accurately and effectively in the compound materials bonding quality.
*This work is supported by Nature Science Fund of China Grant # 60862004 to Zhang Ze.
[2] Smith A C, Yang H.Ultrasonic study of adhesive bond quality at a steel to rubber interface by using quadrature phase detection techniques [J], Materials Evaluation, 1989, 27(12): 1389～1400

For fine grain materials, which have the longest fatigue life, both types of nucleation sites are involved, causing a strong dispersion in fatigue test results.
For large grain materials, nucleation sites are mainly grain facets and the dispersion is smaller but the fatigue life is generally lower [1].
Svensson, Stability of shot peening induced residual stresses and their influence on fatigue lifetime, Materials Science and Engineering A 528 (2011) 1008-1015
Hauk, Structural and Residual Stress Analysis by Non-destructive Methods (1997) Elsevier Science B.V.
Wang, Compressive residual stress introduced by shot peening, Journal of Materials Processing Technology 73 (1998) 64-73

References [1] Gu Junxiang, Lin Tianhui, Qian Xiangrong.Modern Physical Research Methods and Its Application in the Corrosion Science.Peking:Press of Chemical Industry, 1990 [2] Chang Tiejun,Qi Xin.Modern Analysis and Test Methods on Materials,Haerbin:Press of Haerbin Industry University, 1999
Central China Electric Power.2001，Vol.14（4）：5-8 [5] Qi Huibin,Guo Yingzhuo,He Yedong，Wang Deren.High Temperature Corrosion in Boilers of Coal Fired Power Plants.Corrosion Science and Protection Technology.2002，Vol.14（2）：113-116, 119 [6] Xu Hui,Tong Lianghuai,Yu Zhiyong,Huang Chengwei.Analysis of the Cause of Corrosion of the Boiler Water Wall Tube and Treatment.Pipeline Technology and Equipment.2012 No.6：24-26 [7] Chen hongju,Chen Wenxing,Sun Yanhua.Current Situation of Study on Thermal Corrosion Mechanism of Boiler Water Wall in Thermal Power Plants.Electric Power Construction.2000 No.2：17-20,36 [8] Luo Weiguang,Shi Qingyu,Ju Zhenfu,Li Qingjian.High Temperature Corrosion and Proof of Boiler water wall in Thermal Power Plants.Electric Power Construction.2000 No.11：57-58 [9] Zhao Hong,Wei Yong.Discussion on The Mechanisms and Factors of The Gas Side Hign Temperature Corrosion in Water Wall ubes for Coal Fired Boilers.
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References [1] Lee Zheng-Zhong, Taiwan Industrial Vacuum Treatment System - Optoelectronics Industry, Vacuum Technology and Application, Published by Instrument Technology Research Center, National Science Council, Executive Yuan, p.623-624, 2003
Chen, "Preparation of Ni Nanoparticles and Evaluation of Their Tribological Performance as Potential Additives in Oils," Journal of Tribology, Wt.123, p.441-443, 2001
Dang, "Preparation and Tribological Properties of Tetrafluorobenzoic Acid-Modified TiO2 Nanoparticles as Lubricant Additives," Materials Science and Engineering, Wt.A359, p.82-85, 2003
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Study on Incentive Mechanism of Large-scale Dredging Project Based on Fairness Preference Bin Zhou1,a, Zigang Zhang2,b 1Huazhong University of Science and Technology, Wuhan 430074, Hubei Province,China 2Huazhong University of Science and Technology, Wuhan 430074, Hubei Province,China aqyglzx@163.com, bxinxiang027@163.com Keywords: dredging project, fairness preference, principal-agent, incentive mechanism Abstract: this paper establishes fair incentive model of large-scale dredging project using principal-agent theory and fairness preference theory and analyzes the influence of technical parameters of ships and bid price of the dredging project on principal, agent incentives and profits.
In recent decades, behavioral economists and experimental economists have conducted a large number of empirical and experimental researches and research results indicate that people are self-interested within limits and they will also care about the welfare of others and whether the distribution of material benefits is fair or behavioral motive is fair.
Assume that total work amount of individual dredging project is Q cubic meters; i represents agent, i=1,2,…,N; xi is bid price of i agent for one square cubic of land, Yuan/m3; pi is hourly output of the ith agent, m3/hour; pmi is rated hourly output of ship of the ith agent, m3/hour; ti is oil consumption and material consumption of i agent, Yuan/m3; c0i is fixed cost of i agent, Yuan/hour; p0i is critical production of i agent, m3/hour; vi is profit of the project undertaken by i agent, Yuan/hour; v1i is profit obtained by the principal from the project undertaken by i agent, Yuan/hour; yi is payment to i agent made by the principal, Yuan/hour; v2i is revenue of i agent, Yuan/hour.
Scandinavian Journal of Economics, 1995, 97(2): 295~307
Quarterly Journal of Economic,1990,105(4):1003~1015

Study on Proposed Value of Catanchor Coefficient for Large Prestressed Pier Zhenke Huang1, a, Shaojun Fu1, b, Huanfeng Qiu1,c, Shenghong Chen 2,d 1School of Civil Engineering, Wuhan University, Wuhan 430072, PR China 2State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, PR China ahuangzhenke@whu.edu.cn, bsgjg@whu.edu.cn cqiuhuanfeng83@163.com, dchensh@whu.edu.cn Keywords: Prestressed Pier, Catanchor Coefficient, Comparative Analysis, Value Proposed, FEM Abstract.
The various effects can’t be considered comprehensively under the traditional design methods of structural and material mechanics because of complicated stress state in pier.
The creep is an inherent characteristic of the concrete material and the deformation increases as the time under loads.
References [1]Power Industry Standard of The PRC.Design Specification for Hydraulic Concrete Structures(DL/T.5057-2009)[S].Beijing: China Electric Power Press,2010 (In Chinese) [2]F.F.Xia: Master Thesis for Hohai University,2007(In Chinese) [3]Chen Shenghong.Computational Rock Mechanics and Engineering [M].Beijing: China Water and Hydropower Press, 2006(In Chinese) [4]Hui Rongyan,Huang guoxing,Yi bingruo.Concrete Creep[M].Beijing:China Railway Press,1988(In Chinese) [5]Zhu Bofang.Principle and Application of Finite Element Method [M].Beijing: China Water and Hydropower Press, 1998(In Chinese) [6] N.B.Su,S.J.Fu, S.H.Chen:Water Resources and Power,2005,23(3):74-76(In Chinese) [7]C.Zhao,J.Zhang,G.X.Yang,R.Zhang,A.R.Pei:Journal of Hohai University (Natural Sciences),2008,36(5):624-627 (In Chinese) [8]J.J.Pan,Y.J.Xu,S.Fei: China Rural Water and Hydropower, 2007, (9):92-99(In Chinese) [9]G.Y.Li,Y.G.Xiang,S.Tang: Yangtze River,2009,40(23):25-27(In Chinese) [10]Andrew Eberhardt, Jan A.Veltrop
: Journal of the Structural Division, Proceedings of ASCE.1964,90(6):125-146

It is shown that the basic structure of electric wheel power steering system is shown in Fig. 1 from the information retrieved from the current materials.
Acknowledgements This article is sponsored by National Natural Science Foundation of China (51005128) and Qingdao Technological University Dr.
Changchun: Jilin University ,2007:15-58(In Chinese) [9] Wang Qing-nian, Wang Jun-nian, Jin Li-qiang, Hu Chang-jian, Zhang Xiang-zhong: Journal of Jilin University (Engineering and Technology Edition), 2009,39(1):1-6(In Chinese) [10] Jin Liqiang, Wang Junnian, Song Chuanxue, Hu Changjian: Journal of Mechanical Engineering, 2010, 46(14):101-108 [11] Jin Li-qiang, Wang Jun-nian, Song Chuan-xue.
Driver-Vehicle Closed-Loop Simulation of Differential Drive Assist Steering Control System for Motorized-Wheel Electric Vehicle [C]. 2009 IEEE, 2009: 564-571 [13] Wang Chunyan, Zhaowan Zhong, Zhao Ting, Zhou Xie: China Mechanical Engineering, 2012,23 (1):122-125(In Chinese) [14] Zhao Wanzhong, Wang Chunyan, Sun Peikun, Liu Shun: Science China Press, 2012,42 (2) :188-194(In Chinese) [15] Zhu Yongqiang. the Research of All Wheel Steering and Wheels Drive Control of Multi-Axle Vehicle Basing on Electric Wheels [D].