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Dynamic Changing Analysis of Regional Environmental Risk Based on Spatial Population Distribution of Different Time Scales Jiaojiao Li1,a, Meiqi Yu1,b, Shushen Zhang1, Shuming Ma1 and Shan Ding1 1 Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science &Technology, Dalian University of Technology, Dalian, Liaoning, 116024, China alijiaojiao1019@mail.dlut.edu.cn, bymq8006@mail.dlut.edu.cn Keywords: Environmental risk assessment, Population spatial distribution, GIS Abstract.
Resources and Environment, Vol. 22(2012), p. 105 (In Chinese) [2] Pizzol L, Critto A, Agostini P, et al: Environment international, Vol. 37(2011), p. 1307 [3] Jianming Gao, Xikui Wang, Mingrong Zeng: Journal of Safety Science and Technology, Vol. 3(2007), p. 29 (In Chinese) [4] Luciano Fabbri, Sergio Contini: Journal of Hazardous Materials, Vol. 162(2009), p. 1465 [5] Jianming Gao, Ji Liu, Mingrong Zeng, Haiquan Sang, Xikui Wang: Spine safety science journal, Vol. 17(2007), p. 91 (In Chinese) [6] Tingsheng Huang, Fengxiang Wang: Safe environment and health, Vol. 8(2008), p. 7 (In Chinese) [7] Guobao Song, Jiaojiao Li, Shushen Zhang: Mechanic Automation and Control Engineering (2011)

Experimental Materials A Yanzhou bituminous coal sample was ground to particle size of less than 80 meshes, and dried under vacuum at 373K for 10 h before use.
Shen: 11th International Coal Science Conference, USA, San Francisco, (2001).
Zou: Journal of Fuel Chemistry and Technology.
Ling: Journal of China Coal Society.
Ling: Journal of Fuel Chemistry and Technology. 37 (2009) p. 648-653.

Only destroy the film on the surface of the powdered aluminum can the reaction react continuously[6].There are two ways to realize: one is using the outside force to destroy the alumina film, such as the vortex combustor designed by the Pennsylvania State University, as shown in Fig.1,the water revolves at a high speed and the film is destroyed by this way[8]; the other is adding some chemicals which can react with the alumina film and can’t react with the metals. 4 Advancement of aluminum-water reaction and application At present, many organizations do the research in order to apply the aluminum-water reaction to water ramjets, National University of Defense Technology and Northwestern Polytechnical University have done research on the principle, model, and characteristics of water ramjets, Huazhong University of Science and Technology, University of Science and Technology of China have done research on the characteristics of powdered aluminum and combustion mechanism.
References [1] LUO Kai,DANG Jian-un,WANG Yu-cai,ZHANGYu-wen，System capability estimating for a metal/water reaction fuel ramjet system [J], JOURNAL OF PROPULSION TECHNOLOGY，2004，25（6）：495-498 [2] Catoire L,et al.Kinetic Model for Aluminum-Sensitized Ram Accelerator Combustion[J].
Journal of Propulsion and Power,2003,19(2)：:196-202
[3] ZHANG Yun-gang, PANG Ai-min, ZHANG Wen-gang, XIAO Jin-wu, Research status and application prospects of the reaction between metal matrix fuel and water [J], Journal of Solid Rocket Technology，2006，29（1）：52-55 [4] Li Yin，Song Wu-lin，Xie Chang-sheng，Advancement of the application of nano-aluminum to the solid propellant [J]，ACTA ARMAMEN TARII，2005，26（1）：121-125 [5] ZHENG Han-yong , WANG Yong-chang,Experimenrally study of aluminum-water reaction mechanism [J]，SHIP SCIENCE AND TECHNOLOGY，2005，27（3）：81-83 [6] Sun Zhan-peng,Le Fa-ren, Researchon aluminum-waterreaction[J], Chemical Propellants& Polymeric Materials，2006，4（2）：37-39 [7] FAN Mei-qiang, SUN Li-xian, XU Fen, GAO Xiu-ying,Hydrogen generation by aluminum-water reaction [J]，Research on electrical source，2007，131（7）：556-558 [8] Miller, Timothy F., Walter, Jeremy L. and Kiely, Daniel H.

The global development of carbon composite materials has been devoting constantly in still more companies and research institutions.
Introduction In the construction a ratio of composite materials has been increasing rapidly.
Compared to conventional materials, we obtain a many times higher strength with regard to a specific weight.
The value of adhesion of the resin and fibers significantly influences on the properties of the resulting materials [5,6].
Chand, Carbon fibers for composites, Journal of materials science 35, (2000)

Materials and Methods Materials Bacterial Strains Four kinds of bacteria were used.
[2] V.D.Praveena and K.V.Kumar, Physicochemical Studies on Nano Silver Particles Prepared by Green and Chemical Methods, In Advanced Materials Research, 938(2014) 242-250
Dental Materials, 29(2013) 462-472
[12] M.B.Fisher, M.Iriarte and K.L.Nelson, Solar water disinfection (SODIS) ofE. coli Enterococcus spp., and MS2 coliphage: Effects of additives and alternative container materials, Water research, 46(2012) 1745-1754
World Academy of Science, Engineering and Technology, 79(2011) 372-373

These materials are widely used in power plant, petro-chemical and marine applications where the weldments are usually subjected to aggressive corrosion environment.
Experimental Work The candidate materials selected for this study were AISI 304 and Monel 400 and their chemical composition was given in Table.1 GTA welding was carried out on these samples by setting the process parameters as 60V and 110 amps for AISI 304 using ENiCu-7 and E308L; whereas for welding Monel 400, ENiCu-7 filler material was chosen and 60V and 130 amps was employed.
Summary Defect free welds could be obtained using GTA welding with the filler materials ENiCu-7 and E308L offered good resistance to corrosion.
[3] Ramazan Yilmaz and Hüseyin Uzun, Journal of Marmara for Pure and Applied Sciences, 18 (2002) 97-113 [4] Richard D.
Mela, Journal of Failure Analysis and Prevention Volume 4, Number 6, 44-50 [7] Alber A.

Supply chain management is a coordinated activity which ensures buying right material, manufacture right quantity and supply the end product in right time.
Figure.1 Categorization of disruption Disruption from the Supplier-Customer-Manufacturer J.Palombarini and E.Martinez (2012) [3]developed a repair policy for rescheduling problem due to unplanned events like arrival of rush order, raw material delay and machine break down using relational abstraction method.
Demirli (2010) [13] proposed a two phase mixed integer linear programming (MILP) model for material procurement, components fabrication product assembly and distribution scheduling of a build to order supply chain.
The second phase deals with fabrication and procurement planning of companies and raw materials.
Meixell:The impact of setup costs, commonality, and capacity on schedule stability: An Exploratory study:International Journal of Production Economics,Vol 95,(2005),p.95-107 [17]L.Liu and H.

Journal of Oceanography in Taiwan Strait.
Chinese Journal of Ecology.
Journal of Microbiological Methods.
Environmental Science.
Journal of Xiamen University (Natural Science).

Chinese Journal of Rock Mechanics and Engineering, 2006, 25(4): 801-812.
International Journal Rock Mechanics and Mining Science and Geomechanics Abstract, 1985, 22: 121-140
International Journal of Rock Mechanics and Mining Science, 2000;37:245-262
Chinese Journal of Rock Mechanics and Engineering, 2008, 27(2): 236-243.
Chinese Journal of Rock Mechanics and Engineering, 2000, 19(2): 177-181.

The numerical simulation studies on flexural behavior of casing joint of square steel tube were carried out by using finite element analysis software ANSYS/LS-DYNA with consideration of geometric nonlinearity, material nonlinearity and contact nonlinearity.
NCET-08-0542, the National Natural Science Funds No. 50979108, Chinese Universities Scientific Fund No. 2009-3-11, and the Research Start-up Foundation of CAU No. 2008041.
Akiyama：Journal of Society of Steel Construction.
Rasmussen: Journal of Constructional Steel Research.
Wardenier: Journal of Constructional Steel Research, Vol. 62 (2006), p. 316 [5] B.