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In the test of raw materials, the test of fly ash is involved, and fly ash is a material widely used in concrete.
Guangdong Building Materials, 2011 (1)
Analysis on the Mass Concrete Construction Technology Application to Water Conservancy Engineering [J].
Engineering Technology, 2012 (15)
Engineering Technology, 2012 (10)

Research on Application of Traffic Signs in rural highway security engineering Liu Shilong1 Guo Zhidong2 Dong Miao3 (1,2Ji County Office of rural highway management, Tianjin, 301900, China 3School of Civil Engineering, Hebei University of Technology, Tianjin, 300401, China) Key words: traffic signs; security-engineering; application; effective Abstract: Traffic signs are widely used in rural highway security engineering due to low cost, strong directive performance.
On the premise of meet the necessary requirements, reasonable set up logo, make full use of existing conditions, choose economy applicable materials and support form.
References [1] JTG F80/1-2004, Standard for quality inspection and assessment of Highway Engineering part one - Civil engineering [S], Beijing: People's Communications Press,2009,124~125
[3] Jianjun Wang, Rongliang Han, Traffic engineering facilities test technology [M].
Hundred Questions highway engineering quality problems and prevention measures [M].

Ltd, 95 Dongfeng Street, Changchun 130011, China almwang@ciac.jl.cn, bqmpeng@ciac.jl.cn, cYangjie@ciac.jl.cn, ddqfang@ciac.jl.cn, eymwu@ciac.jl.cn, fLiuxf_fc@faw.com.cn, gjmeng@ciac.jl.cn, hhongjie@ciac.jl.cn Abstract: Magnesium (Mg) alloys are becoming one of the key engineering materials for aerospace and automotive industries because of their low density, high specific strength, excellent machinability and good diecastability, etc.
Meanwhile, it is an environmental friendly material with lower energy consumption and recyclable.
As aforementioned characteristics, Mg alloys are used in a variety of structural applications including automotive, industrial, materials-handling, commercial and aerospace equipment.
Acknowledgement This work is supported by Chinese Academy of Science for Distinguished Talents Program, and The Science Program of the Promotes Northeast of CAS (KGCX2-SW-216) and The Key Science Foundation of Changchun (05GG54).
Hou, Materials Science Forum.

Microstructure and Properties of a Calcium Phosphate Cement Tissue Engineering Scaffold Modified with Collagen and Chitosan Xiupeng Wang1, a , Jiandong Ye1, b, Ling Chen2, c, Yingjun Wang1, d 1 Key Laboratory of Specially Functional Materials (South China University of Technology), Ministry of Education, Guangzhou 510641, China. 2 Institute of Light Industry & Chemical Engineering, South China University of Technology, Guangzhou 510641, China.
This CPC scaffold modified with collagen or chitosan was a promising material to be used in bone tissue engineering.
Experimental Materials and preparation.
Calcium phosphate cement was promising to be used in bone tissue engineering.
Ohgushi: Biomedical Materials Engineering.

Composite materials have come to play essential roles in various areas of industry and technology during the past few decades due to their excellent performance.
The 3rd cross-strait conference on composite materials was held on May 7-12, 2003, in Wuhan, China; sponsored by the Natural Science Foundation of China (NSFC).
This issue of Key Engineering Materials contains a collection of 105 selected papers from this conference.
The topics cover major aspects of composite materials, such as metal-matrix composites and ceramic-matrix composites; as well as polymer-matrix composites.

Development of a Mechanical Processing Material Database System Yan Cao 1,a , Ailing Zhou 1,b, Yu Bai 1,c 1 School of Mechatronic Engineering, Xi'an Technological University, Xi'an, Shaanxi, China a jantonyz@163.com, b 498965731@qq.com, c baiyv@xatu.edu.cn Keywords: Material Database, Access, PowerBuilder, System Development Abstract.
Introduction A material database, an important part of a scientific database and an important basis for material researches and applications, plays an important role in material engineering and mechanical engineering of modern industry [1].
The establishment of the tool material database needs to consider the composition of tool materials.
As shown in Fig.2, cubic boron nitride, carbide material, ceramic material, high-speed steel, coating material, diamond material and so on can be used as tool materials.
Ren: Development of Machining Database System for Difficult-to-Cut Materials.

Promoting Scientific Research in Materials Professional with Material Properties and Production for Strengthening the Graduation Design Dong Xianga, ZhiGang Wang b and KeGao Liu c School of Material Science and Engineering, Shandong Jianzhu University, Jinan 250101, China a xiang@sdjzu.edu.cn, b wangzhigang@sdjzu.edu.cn, c liukg163@163.com Keywords: Graduation design; Materials professional; Theory and practice; Scientific research with production; Material property Abstract.
In accordance with the requirements of materials science and engineering course, the undergraduate graduation design of the materials professional is implemented.
Combining with the discipline expertise of materials professional graduates of School of Material Science and Engineering in Shandong Jianzhu University, the methods of research with production are obtained to guide undergraduate graduation design.
For the engineering students, the best topics of graduation project are the engineering design, experimental research and actual operation.
Zang: Chemical Engineering & Equipment Vol 10 (2008), p.186 [4] X.

However, these materials don't meet all the criteria of an ideal bone tissue engineering scaffold.
Lin, et al: Key Engineering Materials Vol. 330-332 (2007), p. 1145 [9] C.
Liu, et al: Key Engineering Materials Vol. 330-332 (2007), p. 1173 [10] K.
Lin, et al: Key Engineering Materials Vol. 330-332 (2007), p. 963 [14] Y.
Liu, et al: Key Engineering Materials Vol. 330-332 (2007), p. 1109

Study on the Edge Quality Control in Grinding Engineering Ceramics P.Y.
Introduction Engineering ceramic materials have excellent characteristics such as high strength, high hardness, low density, low expansion coefficient and abrasion resistance, corrosion resistance, thermal and chemical stability, etc, and it has become a new engineering materials widely used in aviation, petrochemical, instrumentation, machinery manufacturing industry and other new fields.
Glass ZrO2 ceramic 45 Steel Fig.1 Edge comparison diagram As can be seen, contrary to the ideal boundary of metal burr，the edge of glass，engineering ceramics and other hard brittle materials are weak step edge, or sometimes have the material stripping defects.
The results showed that: 1) Contrary to the ideal boundary of metal burr，the edge of glass，engineering ceramics and other hard brittle materials are faint of the steps, or sometimes have the material stripping defects. 2) The performance of nano- ZrO2 ceramics grinding is superior, the marks are smooth and neat, the material surface presents brittle & plastic mixed mode of material removal, but the edge area exists many micro-breakout pit. 3) The grinding wheel's vertical cutting into and cutting out the grinding edge of engineering ceramics are weak step edge.
Acknowledgements This work is financially supported by National Natural Science Foundation of China (No. 50975080)and Key Laboratory of Mechanical Engineering of Henan Province.

Impurity Engineering of Czochralski silicon Jiahe Chen1, a, Xiangyang Ma1, b and Deren Yang1, c 1 State Key Laboratory of Silicon Materials and Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China a jiahe_chen@hotmail.com, b mxyoung@zju.edu.cn, c mseyang@zju.edu.cn Keywords: Czochralski silicon, impurity engineering, defect Abstract.
The novel concept of "impurity engineering in CZochralski (CZ) silicon " for large scaled integrated circuits has been reviewed.
Thus, it is believed that by impurity engineering CZ silicon wafers can satisfy the requirment of ultra large scale integrated circuits.
Impurity engineering I: mechanical properties Nitrogen doping and germanium doping are well established to improve the mechanical properties of silicon wafers.
Figure 4 Schematic illustrations for the 'impurity engineering for internal gettering (IG) structure' in impurity-doped CZ silicon wafers.