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Materials and Methods We chose jiangyou station and beichuan station to investigate the water quality, and select ammonia nitrogen, total hardness, fluoride, these three indicators to analyze the relationship between river flow and water quality before and after the earthquake.
Results and the analysis The relationship between river flow and ammonia nitrogen content before and after the earthquake Through the analysis of jiangyou and beichuan January 2006 to December 2011 the measured flow and ammonia nitrogen material before and after the earthquake, the results as shown in figure 1-4.
Conclusion From the water analysis in severely afflicted area before and after the earthquake, it can be seen that the Wenchuan earthquake make mass material come into water abnormally, such as roke, soil, plant ,people and livestock carcass etc. which make a extensive and comprehensive influence to water quality in severely afflicted area.
Preliminary Analysis of Soil and Water Loss Change before and after Wenchuan Earthquake [J].Journal of Yangtze River Scientific Research Institute,2010:11:0062
Influence of Wenchuan Earthquake on Water Resources and Water Environment in the Upper Reaches of the Minjiang River [J].Journal of Sichuan Normal University (Nature Science), 2009:01:0134

Thus, another case is analyzed, in which material elastic modulus E doesn’t vary with temperature.
But on the whole, under the combined effect of material elastic modulus E and thermal stress, the frequencies decrease in a large amplitude.
Paull: Aerospace Science and Technology, vol. 10(5) (2006), pp. 420–426
[4] Zhongning Zhou, Yimin Li, Yongxia Gu, Yuansen Xie, Wan Sun: Journal of China University of Mining & Technology.
[5] Xiaobo Zheng, Xingqi Luo, Haijun Wu: Journal of Xi’an University of Technology, vol. 21(4) (2005), pp. 342–346 (in Chinese)

Testing Materials and Specimen Preparation Testing Materials.
Acknowledgements Thanks to the Hubei Natural Science Funds (No.2011CDB336) and China University of Geosciences (Wuhan) Laboratory Open Funds (No.SKJ2011099) for funding this collaboration research.
Xing: Materials Science and Engineering, Vol. 479 (2008) No.1-2, p.253
Li: Journal of Materials Processing Technology, Vol. 210 (2010) No.3, p.536
Bao: Journal of Rare Earths, Vol. 29 (2011) No.5, p.489

Nowadays, much attention has focused on solid carbon sources, such as cellulose-rich materials [15, 16].
The packing materials consisted of a mixture of wheat straw and inert material.
These packing materials were dipped in 1000 ml anaerobic sludge for 24 hours, mixed homogeneously, and then were packed in the column; powder quartz sand were placed at both ends of the column to hold the packing materials.
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Acknowledgement We appreciate the financial support of the Fundamental R&D Program for Core Technology of Materials for project.
References [1] Park, S.S., Park, Y.S. and Kim, N.J. (2002) Metals and Materials International 8, 551-554
[2] Park, S.S., Kim, Y.M., Kang, D.H. and Kim, N.J. (2005) Materials Science Forum 475-479, 457-462
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On the other hand, it may also have a certain relationship with materials’ preparation.
There are a large number of dimples in tensile fracture, the fracture mode is ductile rupture, so the materials shows good mechanical properties.
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Through the simulation result we can see some riser are comparatively large, waste materials, some risers are relatively small, not complete the casting feeding requirements and there are some defects in casting.
Another advantage is that this method is not just based on geometry, it also directly take into account thermal effects such as specific properties of chilling or insulating materials and heat saturation of cores or various areas of the mould.
Yang: Journal of Computational Science & Engineering, vol. 5 (2013), p. 196-201
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Nowadays, the polyamide was prepared basically by the derivatives of oil as raw material, such as the two largest varieties in polyamide market, nylon 6 and nylon 66, whose raw materials caprolactam and adipic acid were prepared via a series of hydrogenation and oxidation reactions of benzene homologue.
Experimental Section 1.1 Materials and Instruments Materials: 154 dtex/36 f PA6 filament, Guangdong xinhuimeida polyamide fiber co., LTD.; 166 dtex/72 f PA56 filament, the general logistics department quartermaster equipment research institute; 110 dtex/34 f PA66 filament, Liaoning silver beads spinning group co., LTD.
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With the development of the new kinds of permanent magnetic materials and the tech of drive circuits, more and more electromechanical actuators have been used in the space applications, such as tactical missiles, smart UAV and so on.
Introduction With the development of the new kinds of permanent magnetic materials and the tech of drive circuits, more and more electromechanical actuators have been used in the space applications, such as tactical missiles, smart UAV , X-43A and so on [1,2],where hydraulic actuators have traditionally been employed.
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[17] MAO Shuo, HE Yong-yong .Design and performance analysis of fuzzy-PID controller .Journal of Chinese Inertial Technology 2006;14(2),1055-6734.

China. 2 Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, No.26, He Xing Road, Xiang Fang District, Harbin City, Hei Long Jiang Province, 150040, P.
Materials and Methods P.ussuriensis Kom timbers with similar structure, non-section scar, straight uniform texture was selected.
Journal of Wood, 1995, 41 (9): 811-819
Journal of Wood Science,2004,50(6):479-483
Variance of the Mechanics Strength of Populus ussuriensis Kom Lumber Compressed by Rollers[J].Forestry Science and Technology, 2008,33（4）:37-41