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Improvement of High Algae-laden Water Treatment by Coagulation Aid of Chitosan Yuheng Wang, Shengguang Zhuo, Xiuyan Zhou, Na Li Department of Environmental Science and Engineering, Northeastern University at Qinhuangdao, Qinhuangdao, 066004, China 85916147@qq.com Key words: chitosan; aluminium sulphate (AS); coagulation aid; coagulation/flocculation/ sedimentation (C/F/S); floc settleability; floc structure Abstract.
Introduction Coagulation/flocculation method is a widely applied process in water supply engineering and wastewater treatments for its capability to remove suspended particles and colloidal impurities economically and efficiently.
Materials and Methods Raw Water.

Remediation Effects of Steel Slag and Fly Ash on Heavy Metal Contaminated Acidic Soil GU Hai-Hong1, a, LI Fu-Ping1, YU Qiang2, XU Yong-Li1, ZHANG Jun-Ying3 1 College of Mining Engineering, Hebei United University, Tangshan, Hebei 063009, China 2 Tangshan Industrial Vocational Technical College, Tangshan Hebei 063020, China 3 College of Chemical Engineering, Hebei United University, Tangshan Hebei, 063009, China a Corresponding author. email: haihonggu1982@hotmail.com Keywords: Soil, Heavy metal, Acidic, Steel slag and fly ash, Remediation Abstract.
The key for good effect of in situ immobilization is to choose the appropriate amendments.
Materials and Methods Soil and Amendments.

Effects of Ecological Spur Dikes on Spring Phytoplankton in Wangyu River Peifang Wanga, Jing Huangb , Chao Wangc, Xiaoyu Ai, Jin Qian and Jun Hou Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, China, 210098 apfwang2005@hhu.edu.cn, bmelindagood@yeah.net, ccwang@hhu.edu.cn Keywords: Wangyu River; ecological spur dikes; phytoplankton; biodiversity; water quality Abstract.
Materials and methods Sampling Sites and Sample Collection.
Dong: Water Resources and Hydropower Engineering Vol. 34 (2003), pp. 1-5 [12] A.
Napiorkowski: Ecological Engineering Vol. 36 (2010), pp. 1747-1753 [13] J.S.

The Design and Simulation of Main Tool Carrier System in a Condition of Large Vertical Lathe Jijun Zhang1, 2 a, Xianli Liu2 b, Genghuang He2 c, Zhongguang Yu2 d 1 Engineering College, Heilongjiang Bayi Agricultural University, Da Qing, 163319, China 2 The key Lab of Advanced Manufacturing Tech. & Cutting Tools, Harbin Univ. of Sci. and Tech, Harbin, 150080, P.
Tool overhang is 130mm Figure 4 represent the finite element model for the tool carrier system, meshing conditions and material parameters shown in Table 2.
Fig.4 Finite element model Fig.5 Constraints and load diagram Table 2 Meshing conditions and material parameters of tool carrier system Name Elements Nodes Density [kg/m3] Elastic modulus [Pa] sliding plate 8142 13124 7350 1.56e11 Ram 46536 68665 7800 1.92e11 Blade 4771 7650 11000 5.3e11 Cutter pad 321 667 11000 5.3e11 Cutter body 1029 1787 7820 2.117e11 Cutter screw 286 571 7850 2.06e11 Tool compress block 636 1279 7820 2.1e11 Column screw 488 905 7850 2.06e11 Figure 6 shows the the deformation cloud diagram of the tool carrier, getting the maximum deformation is 0.2753mm, maximum deformation concentrated in the cutting area of the tool, Figure 7 shows the stress distribution cloud diagram, maximum stress is 987.42Mpa, maximum stress also concentrated in the cutting area of the tool, ram and sliding plate are under a small stress.
Solov'ev and Allah Abdullah: Russian Engineering Research, Vol. 28(2008) No.5, pp.493-494.

The Stokes-Darcy coupled problem has been studied by many researchers in many field of engineering.
Different interpolations pairs are known to satisfy this condition for each problem independently, but the key issue is to find interpolations that satisfy both at the same time.
The robustness of ASGS method is demonstrated on more realistic geometries of interest, especially in the context of the manufacturing processes of composite materials. 2D and 3D simulations were conducted with a very small height of the Stokes domain with respect to the Darcy's domain height and a very small permeability (k < 10−14 m2).The figures 2a, 2b and 2c show the isovalues of velocity and pressure obtained for the 2D and 3D realistic simulations obtained with ASGS method.
[3] S.Badia and R.Codina: Computer Methods in Applied Mechanics and Engineering, Vol. 199 (2010), p. 654-667

Effect of Chip Size on Semi-Solid Microstructure of AZ91D Magnesium Alloy Prepared by CRP Process XU Hong-Yu1, a *, JI Ze-Sheng1, b, WANG Ye1, c, HU Mao-Liang1, d, WANG Hai-Bo2, e and Sugiyama Sumio1, 3, f 1School of Material Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China 2School of Architecture and Civil Engineering, Harbin University of Science and Technology, Harbin 150080, China 3Institute of Industrial Science, the University of Tokyo, 153-8505, Japan axuhongyu@hrbust.edu.cn, bjizesheng@hrbust.edu.cn, cwangye@hrbust.edu.cn, dhumaoliang@hrbust.edu.cn, ewanghaibo@hrbust.edu.cn, f516501185@qq.com, Keywords: CRP process, chip thickness, deformation coefficient uniformity, compactness, oxygen content oxidation, semi-solid microstructure.
The required feedstock for semi-solid forming have excellent characteristic of nondendritic or spherical organization, so preparation of semi-solid billet is the key step [2, 3].
In this paper, different kinds of AZ91D magnesium alloy chips are recycled to produce semi-solid billet via CRP process and the microstructures of these billets were investigated. 2 Experimental In the present study, commercial AZ91D magnesium alloy cast ingot with a nominal composition (wt. %) of 8.96Al, 0.68Zn, 0.20Mn and Mg-balance was used as experimental material.

College of communication engineering, Jilin University, Changchun, 130022, China 2.
The key task of MES’s design is modeling and optimizing electrodes configurations with numerical methods to reduce the self-noise in order to improve its output characteristic.
Ogden model is employed: (2) (3) Where and are material constant, λi is main extension ratio, is the train energy density function with time t, which can produce Cauchy stress tensor at time t with the following steps: First, calculating Kirchhoff stress with : (4) Where is the second Piola-Kirchhoff stress tensor at time t, is Green stress tensor at time t
(5) The relationship between Cauchy stress and Kirchhoff stress is: (6) Where is spatial coordinate, is material coordinate, J is Jacobi determinant
Zarins, “Finite element modeling of blood flow in arteries,” Computer methods in applied mechanics and engineering, vol. 158, no. 1, pp. 155-196, 1998

Journal of Basic Science and Engineering.
Geotechnical earthquake engineering.
Journal of the geotechnical engineering division, MAY 1975, p.423
Chinese Journal of Underground Space and Engineering.
Earthquake engineering and engineering vibration.

Stability Evaluation of Karst Foundation Based on Orthogonal Test Yiping Wu1, a, Jianhong Zhou2, b, Qiuxia Zhang1, Zhongjie Zhao1 1 Faculty of Engineering, China University of Geosciences, Wuhan, 430074 2 College of Civil Engineering and Architecture, Guilin University of Technology, Guilin, China, 541004 aypwu@cug.edu.cn, bglzhjh@aliyun.com Keywords: Orthogonal test; Karst foundation; Stability; Substation Abstract.
Through analyzing the engineering geology conditions and the formation mechanism of Huangshi Daye Steel substation karst foundation, we found that there are mostly caves under the karst foundation.
The internal and external factors affecting the vertical settlement of the karst foundation are property of overlaying soil, cave depth and size, property of filling material, groundwater level, foundation load, human engineering activities and cave positional relationship.
Studies on numerical manifold method for determination of safe thickness of karst roof in roadbed[J].Chinese Journal of Geotechnical Engineering.2005, 27(6): 621~625.
[11] Jianpu Zhou, Xianmin LI.Methods of stability analysis in Karst foundation[J].Mining and Metallurgical Engineering.2003, 23(1): 4-11.

The corrosion resistant materials 15-5PH and USS122 maintain the resistance to crack propagation in the presence of the corrosive environment and both are much better than that of Aermet100.
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