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Materials and methods Phosphogypsum samples were from Pingba phosphoric acid plant and Machangping phosphoric acid plant in central Guizhou Province.
Acknowledgements This project was financially supported by Project of Education Ministry of China (2009-1599-20) and National Nature Science Foundation of China (40961030).
Samek: The Science of the Total Environment Vol.149(1994), P. 1–38 [2] A.
Delgado: The Science of the Total Environment Vol.403(2008), P. 80–88 [4] C.G.
Nieto: Journal of Hazardous Materials Vol.148(2007), P. 745–750

Loboda2 1Department of Materials Science and Engineering, Stony Brook University, Stony Brook, NY, 11790 2Dow Corning Compound Semiconductor Solutions, Midland, Michigan, 48686 amichael.dudley@stonybrook.edu Keywords: wide band gap semiconductor, epitaxial growth, stacking fault, threading dislocation Abstract.
Topography experiments were carried out at the Stony Brook Synchrotron Topography Facility, Beamline X-19C, at the NSLS, BNL (DOE Office of Basic Energy Sciences Contract no.
Bagano, Journal of Crystal Growth, 310 (2008) 757-765 [5] M.
Materials Science Forum, 679-680 (2011) 269-272 [6] M.

Materials and Methods Microcystis and Culture Conditions.
In this study, the test material was indigenous blue-green algae, which were taken from a Lake Taihu, China, during the bloom of algae in 2010.
The test material was cultured at 28±2℃ in the axenic BG-11 medium (table 1) at PH 7.0-7.2, under general electric cool white fluorescent lamps at an average intensity of 150μmol photons/m2/s with a 12-h photoperiod, manually agitated three to four times everyday.
Journal of environmental science and health, 2004, A39(6):1435-1446
Biological sciences, 2005, 8:1-3.

Research on MEMS Phthalocyanine-Based Gas Sensor Liu Xin Department of Communication, Heilongjiang University of Science and Technology Harbin, Heilongjiang, China liu_xin1128@yahoo.com.cn Key words: MEMS; gas sensor; NO2 Abstract-A gas sensor based on MEMS (microelectro-machine system) has been developed to provide a sensitive means of detecting nitrogen dioxide.
Copper phthalocyanine (CuPc) is a macromolecule material，the resistance of which will change upon explosion to NO2.
So it is used as the sensitive material of NO2 [6].So far the detection of NO2 in practice has been carried out by using phthalocyanine thin film sensors based on MEMS.
The starting material was an N-type <100>-silicon wafer coated with silicon dioxide and nitride film on both sides.
References [1] Duk-Dong Lee, Nak-Jin Choi, Kap-Duk Song, “Micro Gas Sensor Array for Monitoring Highly Toxic Gases”, Rare Metal Materials and Engineering, 2006, pp. 9–12 [2] HUANG Xiao-ying; LI Juan; WAN Zhong-hua; SONG Li-hong, “Air Quality Assessment for Shenzhen City based on Pollution Harm Index Method”, Environment and Ecology in the Three Gorges, 2009,vol4, pp 26–29 [3] N.

Under ensuring the accuracy of the conditions, in order to accelerate the convergence of computing, on the material properties (such as specific heat) made the appropriate adjustment[4].
When the welding start, the weld material does not exist, it is gradually filled in welds.
Acknowledgements This work described in this paper was supported by National Science Found of China (51108279), Program for Liaoning Excellent Talents in University (LJQ2012054).
[3] Zhuangnan Zhang, Yanan Zhao, Lu Jin: Advanced Materials Research, Vol. 671-674(2013).p446 [4] Lei Hu:Residual Stress of Monosymmetric I-section Beams(Shenyang Jian Zhu University,China 2011).
In Chinese [5] Wen Yang, Yongjiu Shi, Yuanqing Wang,etc:Journal of Jilin University of Technology Vol. 37(2007). p.347.

Analysis on Cracking Cause and Propagation Trend of Concrete Dam Qin Chen1,a, Yaqi Gong1,b and Yongfeng Qi1,c 1Department of Material and Structure, Changjiang River Scientific Research Institute, Wuhan, China, 430010 aChenQin8317@163.com, bGongyq@mail.crsri.cn, cQiyf@mail.crsri.cn Keywords: concrete dam, simulation analysis,cracking cause, propagation trend Abstract.
Distributed crack model, elastic-plastic material model and Drucker-Prager yield criterion are adopted.
(3) Material parameters are shown in Table 1.
[2] Jianjing Jiang, Nonlinear Finite Element Analysis of Reinforced Concrete Structure (Shanxi Science and Technology Press, China 1994)
Journal of Yangtze River Scientific Research Institute, 2007, 24(2):p. 51-54.

In high-rise housing construction project construction process, high operation workload big, construction operation personnel and overlapping of more jobs, more site temporary facilities, poor operation condition, construction personnel fluidity big characteristics lead to a fall accident frequency. 2) Object against accidents in high-rise housing construction project construction process, due to careless operation construction personnel, tools, materials, equipment, parts and other objects falling from the sky onto the lower staff and cause personal casualty accident is the object against accidents[6], mainly includes the following aspects of content: a.
Lifting equipment dismantling hoisting process, material fall from c.
Machinery and equipment aging or slight fault, still run use caused by mechanical equipment parts or fly out of a material d.
Zheng:In the process of building engineering construction safety risk management, Journal of hebei construction engineering college, 2009,p.32-36.
(In Chinese) [4] Z.C.Huang:Engineering supervision of project risk management research, Xi 'an: xi 'an university of science and technology building, 2004,p.5-9.

Virtual Modeling and Finite Element Analysis of Flexspline Based on Solidworks Zhang Rong1, a, Yang Jiajun2, b 1Wuhan polytechnic university industrial & commercial college ,Wuhan, China 2Huazhong University of Science and Technology, Wuhan,China ameryer@sohu.com,byjjlar@sina.com Keywords: Harmonic gear mechanism.
Set the flexspline used in the known valve electric actuator , torque T = 50Nm, working smoothly, ratio u = 100, module m = 0.3, displacements coefficient xr = 3.37, material for 30CrMnSiA[3] .
In harmonic gear ,because flexspline is often effected by alternating stress, so the material of flexspline chooses the material of elastic, high strength .
The stress of the just wheel and the ordinary small module gear is similar.Flexspline chooses commonly used materials of low alloy steel and aluminum permeability nitrogen steel 30CrMnSiA. 3.
Yang: Journal of Chengdu University Vol.9 (1996), p.22 [3] Y.

Even at constant processing parameters, the strength of green compact compressed from binary mixtures can often not be predicted from the compaction properties of the starting materials, because interactions between the materials may occur during the compaction process [3].
From this study, cellulose can be considered as a reinforcement material for iron-based component in the powder metallurgy industry.
Lerk, International Journal of Pharmaceutics, 97(1-3) (1993) 195-203 [4] P.
Pharmaceutical Science, 59 (1970) 688-691

Identification of Polytypes in Sublimation Grown 4H-SiC Crystals by High Resolution X-Ray Diffractometry Jie Dong1,2,a, Li Wang 1, Xiaobo Hu 1 , Xianxiang Li1, Juan Li 1, Shouzhen Jiang1, Xiufang Chen1 , Xiangang Xu 1,b , and Minhua Jiang1 1 State Key Laboratory of crystal Materials, Shandong University, Jinan 250100, P.R.
Introduction 4H-SiC is a key semiconductor material that can be used in high frequency and high power devices for its lower anisotropy electron drift velocity.
Acknowledgements This work was supported by the National Natural Science Foundation of China (Grant No.60025409 and No. 50472068), National "863" High Technology Plan (Grant No.2001AA311080) and the program for new century excellent talents in university.
Jiang: Gongneng Cailiao/Journal of Functional Materials.