Search results

Introduction Research on the fracture toughness of metallic materials is one of frontier topics of Fracture Mechanics.
Acknowledgements The present was supported by the National Science Foundation of China.
Srawley, Plane Strain Creak Toughness Testing of High Strength Metallic Materials.
International Journal of Fracture.1998,89:85-102P
Key Engineering Materials. 2007, 334: 153-156P

Wan2,b 1Electronic and information engineering, Nanjing Communications Institute of Technology, Nanjing 211188, China 2College of Science, HoHai University, Nanjing 210098, China akaijuzhang@126.com, bforegotech@126.com Keywords: AlxGa1-xN/GaN；AMPS-1D；Numerical simulation；quantum well Abstract In this work, the one dimensional simulation program called analysis of microelectronic and photonic structures (AMPS-1D) is used to study the performances of depth of AlxGa1-xN/GaN heterojunction quantum well.
Introduction The III-nitride semiconductor materials, such as GaN, SiC, ZnSe and diamond have the characteristics of wider forbidden band, high electron mobility, low permittivity and better ability of heat conductivity.
They are suitable for manufacturing high-temperature, high-frequency, high-power and high-density integrated electronic devices[1-3].Materials with different band gap energy are used to obtain hetero structure to manufacture devices based on these semiconductor structures [4-5].
In these selectively doped semiconductors hetero structures a two dimensional electron gas forms at the hetero interface which is usually separated from the impurities on the high energy gap side by a thin layer of undoped material.
Cardona, Fundamentals of semiconductors: physics and materials Properties (Springer, 1996) [7] Guo, Q, Yoshida A., Jpn.

Introduction 2024 aluminum alloy has been widely applied in many industrial fields as one of structural materials because it has excellent properties such as low density, high strength, good hot-workability and good corrossion resistance [1,2].
And subsequent treatment can furtherly enhance mechanical properties to satisfy the needs of structural materials. 2024 alloy is one of deformation aluminum alloys, which contains copper and magnesium as major additional elements and can be strengthened through heat treatment [3-4].
Material and experimental The experimental samples were taken from extruded 2024 aluminum alloy bar.
(in Chinese) [2] LIU D, ATKNSON H V, KAPRANOS P, etc: Journal of Materials Science and Engineering Vol.361(2003): 213-224

Then, the materials from MSW would be recycled as energy or resources.
On the basis of in-depth analysis and study the life garbage matrix composition and garbage component properties, MSW was sorting through a series of cooperation equipment for organic matter, magnetic materials, inorganic brick, plastics, paper, fabric, etc.
Organic matter was used to compost organic fertilizer; mixed plastics from MSW was used to produce plastic-wood composite materials; fabric, paper and other combustible materials were used to produce refuse derived fuel(RDF), which is a fuel with high calorific value.
Combustible materials as paper and fabric after class preparation were used to produce RDF, which were pure and simple, especially no metals.
Journal of Environmental Management 62(2001),p,3-19 [7] Wang J, Han L, Li S, Waste Management (28)2008.

Industrial Development and Construction of Complex Saemaul Planning Xin Jie Wu 1, a, Kang Cai Nie2,b, Huang Hua Wu3,c and Zheng Yang Wang4,d 1Southwest University of Science and Technology, Mianyang, China 2 Southwest University of Science and Technology, Mianyang, China 3 Southwest University of Science and Technology, Mianyang, China 4 Southwest University of Science and Technology, Mianyang, China a78214356@qq.com, bnkc@foxmail.com, c981434846@qq.com, d674012544@qq.com Keywords: Urban Planning, Industrial Development, Complex Saemaul, Tourism Culture Abstract.
However, they could not give people the powerful impact on the visual, for their crude style and different materials.
For the new complex system engineering, urbanist should not look stay only in material spatial renovation, but think more in depth to develop the saemaul under the impact of economic tide.
Without orientative industry, completed infrastractural facilities or profound cultural foundation, the development of the saemaul couldn’t be steady References [1] Chunrui Wang: The interpretation of complex saemaul construction in the urban-rural planning, Hebei Academic Journal Vol. 31-5 (2011), in Chinese

Journal Citation (to be inserted by the publisher) Copyright by Trans Tech Publications Microstructure of carbon filled HDPE/EPDM composites studied by positron annihilation spectroscopy** H.M.
Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, P R China 2.
Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P R China 3.
HDPE and EPDM are two kinds of antipathetic materials.
EPDM is an amorphous material and thus according to Wessling’s theory [10], as its content is below the percolation point, all the EPDM particles in the polymer volume are in the form of flat agglomerate.

Due to the limitation of the analysis method of science and technology, the measurement of binder concentration and its migration are not yet fully able to quantitative exactly, only half quantitative.
Experimental Materials Ultracote No1 clay from USA, mean particle size 0.6μm; CaCO3 from ECC England, mean particle size 1.1μm; SB-latex from Japan; oxidized starch and 70gms base paper from home market.
Journal of Pulp and Paper Science, 1998, 24(5)：141 [3] R Pasi，H Heikki.
The effect of intense air drying on material distribution and quality in coated papers[J].
Science press, Beijing, 1988 [5] Zhaohui Zhen.

Toward the High-Quality Graphene for Optoelectronic Applications by Optimization of the Growth and TransferParameters Lang Wang1,2, a,Jianhua Zhang2, b, Lianqiao Yang2,c 1 School of Materials Science and Engineering, Shanghai University, Shanghai, 20072, China 2 Key Laboratory of Advanced Display and System Applications (Shanghai University), Ministry of Education, Shanghai, 200072, China ahlpluo@shu.edu.cn, bjhzhang@staff.shu.edu.cn, cyanglianqiao@shu.edu.cn Keywords:Granphene, CVD, copper, transparent conductive layer Abstract.In this paper, the process parameters of graphene during fabrication and transfer are investigated.Cu is utilized as the substrate and chemical vapor deposition are used to obtain graphene.
Blake, A.N.Grigorenko, et al., Science Vol. 320(2008), p. 1308
An, et al., Science Vol. 324 (2009), p. 1312
Reina, Son, H.; Jiao, L., et al., The Journal of Physical Chemistry C Vol. 112(2008), p. 17741
Ruoff, Science Vol. 330(2010), p. 946

Preparation of microbial flocculant and its preliminary application on removal of ammonia in tannery effluent Changqing Zhao 1,3,a, Qinhuan Yang 2, Bo Teng 3,b, Wuyong Chen 3, Li Jiang 1, Yan Wang 1 and Sisi Deng 1 1 College of Bioengineering, Sichuan University of Science & Engineering, Zigong 643000, China 2 College of Material and Chemical Engineering, Sichuan University of Science & Engineering, Zigong 643000, China 3 National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, China aemail: zhaocq81@163.com, bemail: teng_boo@163.com Keywords: tannery wastewater, ammonia, microbial flocculant Abstract.
Experimental Procedure Materials Bacillus cereus in the experiments was conserved in our laboratory and the tannery effluent was from a tannery in Sichuan (China).
Acknowledgements This work was financially supported by the Startup Project of Scientific Research for Sichuan University of Science & Engineering (Item No. 2010XJKRL003) and the Key Project of Chinese Ministry of Education (Item No. 211161).
Wang, et al.: Journal of Sichuan University (Engineering Science Edition, Vol. 40(2008), p. 94-98.

Finally, the benefits of the widespread use of remanufactured lifting machinery which can make the best use of various resources to achieve energy saving, material saving and environment protection goals are discussed in order to draw key conclusions.
Acknowledgements The authors would like to thank the support from the National Administration of Quality Supervision, Inspection and Quarantine (AQSIQ) Science Foundation of China (2011QK129).
Journal of Cleaner Production, 2011, 19(17): 2004-2014
Materials engineering, 2003, 1.