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Materials and Methods Sample Collection.
The reagents used in analysis were all guaranteed ones, and the water used were all ultra-pure water, and for all analysis processes the soil reference materials for national standard (GSS-1) were added for quality control, and the results were in line with the quality controlling requirements.
Glegg, Fluxes and retention of trace metals in the Humber Estuary, Estuarine, Coastal Shelf Science, 44 (1997) 97-105
Wu, Evaluation on the potential ecological risk for the river mouths around Bohai bay, Research of Environmental Sciences, 15 (2002) 33-37.
Wang, Background value of soil heavy metal in the Three Gorges Reservoir District, Chinese Journal of Eco-Agriculture, 16 (2008) 848-852.

There are rich mineral resources, including: ferrous metals, nonferrous metals, fuel minerals, building materials, chemical raw materials, geothermal and mineral water and other resources.
Acknowledgements This work was financially supported by the Sichuan Science & Technology Pillar Program (2008SZ0158).
References [1] Chungeng Zhu,Xiaodong Ma and Zhaoyi Meng, in:The theories, Methods and empirical of Major Function Regionalization, edited by Science Press, Beijing (2007), in Chinese [2] Xiaoming Guo, Chengzhi Li and Zhujun Liao: Reform of Economic system NO.1 (2009), p.135-136, in Chinese [3] Statistical Bureau of Sichuan, NBS survey Office in Sichuan: Sichuan Statistical yearbook. edited by China Statistics press, Beijing (2010), in Chinese
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University of finance and economics press, Cheng du (2009), in Chinese [14] Shaoming Tang: Forestry of China, 6B (2010), in Chinese [15] Xunshu Zhang: Guangzhou Environmental Sciences Vol.23 (2008), p.44-48, in Chinese

Bills [20] presented a linear cumulative damage model of viscoelastic materials which can be generally used as a basic damage model to assess the experimental results on solid fuel structure.
The software has its own interpretation of the characteristic properties of the polymeric materials and that of adhesive joints.
Pocius, Adhesion Science and Engineering-I (The Mechanics of Adhesion), 1st ed.
Williams, Structural Analysis of Viscoelastic Materials, AIAA J. (1963), pp. 785-798
Jana, An efficient axisymmetric hybrid-stress-displacement formulation for compressible/nearly incompressible material, International Journal of Pressure Vessels and Piping., 77 (2000), 651–667

Investigation of the applicability of the thermo photo analysing method in die casting technology 1,aMonika Tokár, 1Levente Tóth, 2Tamás Rick, 3,bTamás Mende 1 Department of Metallurgical and Foundry Engineering, University of Miskolc, H-3515 Miskolc, Hungary 2 FémAlk Aluminium Die Casting Foundry plc, Hungary 3 Institute of Material Science, University of Miskolc, H-3515 Miskolc - Egyetemváros, Hungary a virginie19@freemail.hu, b kohme@freemail.hu Keywords: high pressure die casting, thermo camera, aluminium Abstract.
In pressure die casting, spraying the surface of the casting die with detaching material is a really important technological step, and spraying time - as a part of cycle time influencing productivity - is a very significant parameter.
G.Zhi-peng,X.Shou-mei,L.Bai-cheng,M.Li,J.Allison: Determination of the heat transfer coefficient at metal-die interface of high pressure die casting process of AM50 alloy, International Journal of Heat and Mass Transfer, Volume 51, Issues 25-26, December 2008, Pages 6032-6038

Materials flow begins in small zone beneath the contact surface which is constrained by elastic material around.
Nishizaki et al., Scanning tunneling microscopy and spectroscopy studies of superconducting boron-doped diamond films, Science and Technology of Advanced Materials 7(2006) 22–26 [33] E.L.
Materials Park: OH, (1992) 419–429
ASM International: Materials Park, 8(2000) 232–243
Kulik, European Cells and Materials 1(2001) 12

Material and Methods Location.
The formation of nano-sized particle of phosphate rock was carried out at the Nanotechnology and Graphine Laboratory, Faculty of Mathematics and Natural Sciences, Padjadjaran University.
Furthermore, the granules of phosphate rock made in nano size particle in the Laboratory of Instrumentation Systems and Functional Materials processes at the Nanotechnology and Graphene Research Center, Mathematics and Natural Sciences Faculty, Padjadjaran University.
Khan, Nanoparticles: Properties, applications and toxicities, Arabian Journal of Chemistry. 12 ( 2019) 908-931 [10] Ginting, R.C., Badia, R.
Turmuktini, Pegaruh Mikroba Pelarut Fosfat Penghasil Zat Pengatur Tumbuh terhadap Fosfat Tanah, Pertumbuhan dan Hasil Jagung serta Efisiensi Pupuk P pada Tanah Marginal, Research Report, Departemen of Soil Science and Land Resources, Padjadjaran University, Sumedang, 2013

A Framework for Sizing Solar PV Systems Adaptable to Off Grid Areas Nyangoka Isaac Kerina1,a *and Vincent Omwenga2,b 1,2School of Computing and Engineering Sciences, Strathmore University, Kenya aisaac.nyangoka@strathmore.edu, bvomwenga@strathmore.edu Keywords: Solar Photovoltaic (PV), Sizing, Framework, Off grid Abstract.
Subhakar, "Sizing and Parametric Analysis of a Stand-Alone Photovoltaic Power Plant," IEEE Journal of Photovoltaics, vol. 3, pp. 776-784, 2013
Egibo, "The sizing of stand alone PV-systems: a review and a proposed new method," Solar Energy Materials and Solar Cells, vol. 26, pp. 51-59, 2016
Kumar, "Simulation Tools for Technical Sizing and Analysis of Solar PV Systems: Proceedings of the 6th World Conference on Applied Sciences, Engineering and Technology (WCSET-2017)," pp. 218-222, 2017
Shepley, "Benefits of solar photovoltaic systems for low-income families in social housing of Korea: Renewable energy applications as solutions to energy poverty," Journal of Building Engineering, vol. 28, 2020

Plant material:The dried whole plant of P. zeylanica were collected in August 2009 YunNan province, China .
X.Tan,Q.Wu:Journal of chinese pharmaceutic sciences.

So using the technology of birth and death is better than using ‘empty element’ and changing the type of material to simulate the excavation and support of tunnel. 3 Finite element analysis of geostress 3.1 Model parameters.
Application of Steel fibre reinforcedsprayed concrete to a deep tunnel in weak rocks Journal of Coal Science &Engineering (China)[ J]. 2002,18(2) :49-54.

Over the past three decades, the science of catalyst deactivation has been steadily developing, while literature addressing this topic has expanded considerably.
The washcoat provides a high surface area material on which to distribute the active component.
Park, International Journal of Automotive Tech., Vol.10, No.6, pp.753-759, 2009