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Therefore, it is necessary to study on mining subsidence disasters characteristic in loess gully areas. 2.1 Stress distribution and deformation law of mining loess Through the conventional three axis test, it can be discovered that loess has a more obvious nonlinear deformation characteristics than other materials.
Journal of Xi’an University of Science and Technology, 2012, 32(3): 269-274. 165
Journal of China University of Mining and Technology, 2008, 37(1): 43-47. 170
Journal of Engineering Geology, 2013, 21(6): 920-925. 175
Journal of Engineering Geology, 2001, 9(3), 233-240

Actually, the cementitious materials has been changed from simple cement to admixture of cement and fly ash.
The water-binder ratio obtained in step 3 can be used to calculate through to ask formula , combining formula ，and can be obtained, and then dosage of cementitious materials and water can be obtained through their density, The density of cementitious materials can be calculated by formula as , , are quality ratio of cement and fly ash in cementitious materials respectively. 4.
Journal of the Chinese Ceramic Society. 28（2009）194-198
Journal of Building Materials. 13（2010）705-710 [7]Liu Guangtong, Zhang Baosheng, Yuan Jie, etc, Discussion of mix proportion design method based on the optimum paste-aggregate ratio,J.
Journal of the Chinese Ceramic Society. 34（2006）1026-1030 [9]Mehta P.

Urethane polymers exhibit excellent abrasion resistance but low hydroxyl number lead to inherently poor modulus materials.
Experimental Material used.
Journal of Applied Polymer Science 2012, 125, E51-E60
International Journal of Polymeric Materials 2006, 55, 549-561
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 2007, 265, 98-103.

In the warehouse storage, aircraft products and materials are stored in the subregional.
Before they are out-warehouse, firstly the staff could pick the products and materials according to users’requirements list.
The products and materials on the same list may be in a region of memory , may also be in a different zone stowage.
So the in-transit vehicles, containers, products and materials are monitored real-time, the users can query the location of products and materials through the internet.
Violino: RFID takes wings,submitted to Journal of RFID Journal, Vol.10(2004),p.13-17

Surface charge properties of aggregate materials There are two main kinds of aggregate materials used in highway engineering, which one is alkaline and another is acid.
Furthermore, acidity and basicity of aggregate materials are interrelated with the properties of surface charge, that is, if acidic aggregate materials react with water to form hydrogen ions, so the surface of materials has negative charge and solvent medium shows alkaline property.
Otherwise, alkali aggregate materials react with water to form hydroxide ions yielding positive charge on surface of aggregate materials and causing solvent medium shows alkaline property.
According to the summary of above analysis, alkaline materials is hydrophobic materials that easily react with bitumen, while acidic materials are hydrophilic which react with bitumen difficultly.
It can be seen that, from the Table 2, the heat of reaction between anionic aqueous emulsifying agent and the materials was nearly same as the heat of which water reacted on the materials.

Advanced Membrane Materials for Fuel Cell Applications S.
As a result alternative cheaper membrane materials have been developed.
Various inorganic materials had been composted to Nafion ® polymer with various inorganic materials to improve the properties.
Several materials have been studied on the goal of having cost-effective PEMs.
Stone, International Symposium on New Materials for Fuel Cell and Modern Battery Systems, 2nd edn, Montreal, July 6-10, 1997; New Materials for Fuel Cell and Modern Battery Systems (1997) 792

Experimental materials and methods Experimental materials.
XKY2011209), and Xuzhou Key Laboratory of Materials forming technique for Engineering Machinery.
Journal of Materials Processing Technology. 2007,185: 113-119 [2] Bin Wang, Wenbin Xue, Jie Wu, Xiaoyue Jin, Ming Hua, Zhenglong Wu, Characterization of surface hardened layers on Q235 low-carbon steel treated by plasma electrolytic borocarburizing[J].
Materials Science and Engineering. 2007, 449–451: 890-893 [6] B Edenhofer, W Gräfen, J Müller-Ziller, Plasma-carburising — a surface heat treatment process for the new century[J].
Experimental Thermal and Fluid Science, 2002,27: 1-10

Journal of University of Science and Technology Beijing, 2012, 34(3): 289-297
EBSD and its applications in materials research.
Journal of Materials Engineering, 2008(7): 1-5
Journal of Materials Engineering, 2013(6): 35-39
Materials for Mechanical Engineering, 2007, 31(3): 4-8

PDMS is a kind of silicone materials, while the MEA (Nafion®) is fluoride, so 3M® 9119 adhesive tape is used due to its applicable property: one side of the double-side-gelatinized tape is capable of adhering with silicone materials, while the other side is capable of adhering with fluoride materials.
Furthermore, the side of adhering with fluoride materials is able to adhere with metal materials, which has simplified the demand of bonding materials.
In order to simplify the description below, the side of adhering with fluoride materials of the adhesive tape is defined as Side A, and the other side is defined as Side B.
Journal of Power Sources Vol. 163 (2007), p. 743-754
Journal of Power Sources Vol. 192 (2009), p. 494-501

Ceramic materials have particular properties when compared to other classes of materials, exhibiting poor ductility as an example.
Sorrell, Some important factors in the wet precipitation process of hydroxyapatite, Materials and Design 24 (2003) 197–202
Tampieri, A novel sol–gel technique for hydroxyapatite prepara- tion, Materials Chemistry and Physics 78 (2003) 816–824
Shen, The effect of citric acid addition on the formation of sol–gel derived hydroxyapatite, Materials Chemistry and Physics 74 (2002) 92–97
Bonfield, Effect of powder characteristics on the sinterability of hydroxyapatite powders, Jour- nal of Materials Science: Materials in Medicine 12 (2001) 163–171