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Effects of deformation ratio above recrystallizaton temperature on microstructure and properties of 2A12 aluminum alloy Shixing Zhang1,a, Yuping Zhu2,b, Gangyi Cai 1,c 1School of Mechanical and Electrical Engineering, Henan University of Technology, Zhengzhou 450007, China 2Zhengzhou Nissan Automobile Company Ltd. , Zhengzhou 451450, China azsx010901@sohu.com, bzhuyp913@163.com, ccgysohu@sohu.com Keywords: 2A12 aluminum alloy, Thermomechanical treatment, deformation ratio above recrystallization temperature, microstructure, hardness Abstract.
Introduction 2xxx aluminum alloy belongs to Al-Cu series alloy, which is a heat-treatable deformation alloy. 2A12 aluminum alloy containing small amounts of silicon is one kind of hardenable alloy which can achieve moderate strength by precipitating ageing and has wide application in aerospace, aeronautic, automobile and civil industries as one of structural materials because of its perfect properties such as low density, high strength, good workability [1-3].
[2] Zhu Zhangxiao, Yao Kefu: Engineering Materials(4th Edition), Tsinghua University Publishing Press (2009) in Chinese

Influence of anisotropic internal friction angle on the stability of uniform soil slopes Zhang Lian-Wei1, 2, a 1 School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China 2 Key Laboratory of the Ministry of Education of China for High-Efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing 100083, China aGeoZhangLW@126.com Keywords: Soil slope, Stability, Shear strength, Anisotropy, Limit equilibrium.
Journal of Engineering Mechanics-ASCE, 2003, 129(2): 160-166 [4] Miura S, Toki S.

Compressive Properties of Steel Fiber Reinforced Ultra High Strength Concrete Jun Sua, Junlin Taob , Tang Lic , Yan Yind School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China asujun5242@163.com, bjunlintao@126.com, cisabel-hu@hotmail.com, dyywodelanqiu@yahoo.com Keywords: Steel Fiber, Ultra High Strength Concrete, Compressive Property, Failure Mode Abstract.
It has been widelly used in military engineering, especially in some special projects, such as protective works of nuclear power plants, for its perfect performance in anti-penetration and anti-explosion, so far, the mechanical behavior of SFRC has been investigated by many researchers, but the work of SFRUHSC is very limited [[] Sun W, Luo X, Yan H D, et al., Proceeding of 2nd Asia-Pacific Specialty Conference on Fiber Reinforced Concrete, Singapore, August 27-28,1999,p.197-203. ,[] Cheng Qingguo, Gao Lubin.

Effects of thermomechanical treatment process on the microstructure and properties of Al-Zn-Mg alloy Gangyi Cai a, Yuyong Yang b, Xiaohua Li c School of Mechanical and Electrical Engineering, Henan University of Technology, Zhengzhou 450007, China acgysohu@sohu.com, byangyuyong@haut.edu.cn, clxh@haut.edu.cn Keywords: Thermomechanical treatment, Al-Zn-Mg aluminum alloy, microstructure, property.
Introduction Al-Zn-Mg aluminum alloy belongs to one kind of high-strength aluminum alloy, which have perfect performance such as low density, high strength, good workability, and have widely application in aerospace, aeronautic, automobile and civil industries as one of structural material [1,2].
References [1] Weiping Gan, Hongtao Fan, Keqing Xu: Aluminum Fabrication, Vol,3(2003),p.6-10 [2] Changbin Liu, Changqing Xiao: Mining Metallurgical Engineering, Vol, 23(2003),p.74-78 [3] Zhiliu Hu, Naiguang Cao: Transactions of Nonferrous Metals Society of China, Vol,5(1995),p. 72-76 [4] Fisher J, James J: Adv Mater Proc, vol, 16(2002),p.43-46 [5] Xingdan Li: Shanghai Metals, Vol,13(1992),p. 13-22

Recycling of Waste Concrete and Fly Ash for Recycled Aggregate Concrete: Fundamental Characteristics Evaluation Cheolwoo Park1, a 11 Dept. of Civil Engineering, Kangwon National University Samcheok 245-711 Korea a tigerpark@kangwon.ac.kr Keywords: Recycling, waste concrete, fly ash, recycled aggregate concrete Abstract.
It I finally conclude that the recycled concrete aggregate can be successfully used in the construction field and the recycling rate of waste concrete and flay ash should be increased without causing significant engineering problems.
Primary reasons may include negative understandings of concrete engineers on the quality and performance of RCA and concrete using RCA [2].

Compared Research on Elastic Modulus Strength between Manufactured Sand Concrete and Ordinary Concrete Shengdong He 1,2,a, Lixin Liu 1,b, *, Qianqian Li 1,c ，Zhiyou Zhang3,d 1 School of Civil Engineering, Zhengzhou University, Zhengzhou 450002, P.R.China； 2 Construction and development company of Zhengzhou Road & Bridge Group Co., Ltd., Zhengzhou 450002, P.R.
This could be used as a reference for the applications of the concrete using the manufactured sand as a fine aggregate in engineering.
Railway engineering cost management. 7(2007)28-31

Experimental Study on Flexural Property of Reinforced Concrete Beams with Recycled Aggregate of Construction Waste Zhaohua Du1,2,a, Tong Hao1,b and Lixin Liu1,c,* 1 School of Civil Engineering, Zhengzhou University, Zhengzhou, 450002, Henan, China 2 Zhengzhou University Multi-functional Design and Research Academy, Zhengzhou, 450002, Henan, China ahndzh1972@163.com, bhaotong@zzu.edu.cn, cliulin_xin@126.com Keywords: recycled concrete beams, replacement rate, flexural Property, bearing capacity, cracking resistance Abstract.
These results may be as a reference for the application of the concrete with recycled aggregates of construction waste in engineering [2,3,4].
The results show that all testing component/value are larger than average 1.0, and the coefficient of variation of the smaller, Show that the experiment values of maximum crack width of concrete beams were less than the theoretical value, regularity is better, engineering application tends to safety.

The intergovernmental concerns never took into consideration both the sustainability factor and the cultural one, not until the 1990s when research on climate change expanded and the sustainable development took an important place in the different academic cross fields: engineering, biology, technology and architecture.
In their report, Morton et al. [7] showed (Fig. 2) that the unfired adobe bricks are using nearly three times less energy than a lightweight concrete blocks, this is  five times less energy than a fired common bricks, and nearly seven times less than a fired engineering bricks and also eight times less than an aerated concrete blocks. [7].
Educate architects to this vernacular product, involving civil engineers to improve the mechanical properties of the adobe using natural materials and finally create and international research and training centers for the know-how.

Due to the advancement of technology, war or civil ships are carrying more and more antennas and sensors, both for entertainment (TV antennas) as well as for everyday tasks (navigation radar antennas, positioning, arms and communication).
The labview software LabVIEW (Laboratory Virtual Instrument Engineering Workbench) is a graphical programming language, from National Instruments (NI), that uses icons instead of text to create applications.
Ogata, “Modern Control Engineering”, Prentice Hall, 4th edition, 2002

Research on the New Assessment Model of Water Source Quality Based on Maximum Entropy Principle LU Ren-qiang Department of Civil Engineering and Construction Management, Hunan University of Science and Engineering, Yongzhou, Hunan 425100, China Keywords: maximum entropy principle; water source quality; assessment model Abstract: Water source quality is the crucial factor to determine the safety and reliability of urban water supply, and the effective water quality assessment is the premise for water source conservation.