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，Kipp，M.E.Continuum modeling of explosive fracture in oi1 shale[J], International Journal of Rock Mechanics & Mining Sciences，1980，17(2):147～157
Part I: Equivalent Material Property Approach[J].
Assessment of the quality of building stones using signal processing Procedures [J].Quarterly Journal of Geophysical Research，1996，29 (4):299～308
International Journal of Rock Mechanics & Mining Sciences，2001, 37(10):1123～1131
Seismic Response of Rock Mass to Blasting& Rock burst Potential, International Journal of Rock Meehanies&Mining Sciences.1998，35 (5):390～391.

Experimental program The experimental system(showed in Fig.1) is installed in the Fundamental Science on Ergonomics and Environment Control Laboratory in Beihang University.
And the test specimen is covered with oak material for heat preservation.
Papadakis, Parametric Investigation of a Bleed Air Ice Protection System, AIAA Aerospace Sciences Meeting and Exhibit. 44 (2006) 1-28
Su, Investigation on Heat Transfer in Pin Fin Array, Journal of Aerospace Power(Chinese) , 112 (1999) 95-99
Su, Investigation on Heat Transfer in Pin Fin Array, Journal of Aerospace Power(Chinese). 12 (1997) 175-179.

However, an understanding of the surface mechanical properties, such as hardness and scratch resistance, as well as wear properties of these kind of materials is lacking.
Polyurethane (PU) is an important class of polymer materials for a variety of applications due to their useful properties such as excellent flexibility, elasticity and damping ability.
Therefore, it is reasonably believed that PU can serve as an excellent matrix for polymeric clay nanocomposite materials.
Experimental work Materials fabrication of PU–clay composite material.
intercalated into montmorillonite clay, Materials Science and Engineering: A, Volume 399, Issues 1-2, 15 June 2005, Pages 368-376

Different environmental conditions affect the properties of composite materials and determine their service lives.
So many researches are focusing on the effect of accelerated aging on the properties of composite materials.
Tandon et al. [4], examined the thermo-oxidative behavior of high-temperature polymer matrix composite materials.
Akay and G.R.Spratt: Composites Science and Technology, 2008(68), p. 3081 [3] Liu Dongxun and Zhan Meizhen : Journal of Materials Engineering，1997(11), p. 34 [4] G.P.
Schoeppner: Materials Science and Engineering A, 2008 (498), p. 150

Preparation and Performance Evaluation of PU Foam Composite Board Jia-Horng Lin1, 2, 3, b, Yu-Chun Chuang1, Ching-Wen Lou4, Ting-Ting Li5 and Chen-Hung Huang6, a 1Laboratory of Fiber Application and Manufacturing, Department of Fiber and Composite Materials, Feng Chia University, Taichung City 407, Taiwan. 2School of Chinese Medicine, China Medical University, Taichung 40402, Taiwan. 3Department of Fashion Design, Asia University, Taichung 41354, Taiwan. 4Institute of Biomedical Engineering and Material Science, Central Taiwan University of Science and Technology, Taichung 406, Taiwan. 5School of Textiles, Tianjin Polytechnic University, Tianjin 300387, China. 6Department of Aerospace and Systems Engineering, Feng Chia University, Taichung City 407, Taiwan.
According to materials’ flexibility, puncture-resistance fabric and composites can divide into rigid, half-soft and soft type, and their purpose is to prevent human body from sharp weapons injury [2].
A New Parameter of the Dynamic Buffer Capability of Material, Journal of Vibration and Shock. 20(2001)
Processing Technique and Proper by Evaluation of Stab-Resistant Composite Fabrics, Advanced Materials Research, 239-242(2011), 683-686
Processing Technique and Property Assessment of Stab-Resistant Composite Fabrics, Advanced Materials Research, 239-242(2011) 1990-1993

Introduction Due to the increasing demand on lightweight materials in automotive and aerospace applications, magnesium and its alloys have gained widespread attention in scientific research and commercial application.
L. and Gupta, M. (2005) Enhancing damping of pure magnesium using nano-size alumina particulates, Materials Letters 59, 3851 - 3855 [2] Ferkel, H. and Mordike, B.
L.(2001)Magnesium strengthened by SiC nanoparticles ,Materials Science and Engineering A,298, 193-199 [3] Hassan, S.F. and Gupta, M. (2004) Development of high performance magnesium nanocomposites using solidification processing route, Materials Science and Technology20, 1383-1388 [4] Lee, C.J., Huang, J.C. and Hsieh, P.J. (2006) Mg based nano-composites fabricated by friction stir processing, Scripta Materialia 54, 1415-1420 [5] Lan, J., Yang, Y. and Li, X.
C. (2004) Microstructure and microhardness of SiC nanoparticles reinforced magnesium composites fabricated by ultrasonic method, Materials Science and Engineering A 386, 284-290 [6] Pan, L., Tao, J. and Liu, Z.
L. (2005) Zinc matrix composites prepared by ultrasonic assisted casting method, The Chinese Journal of Nonferrous Metals 15(3),104-109

The practical non viscous debris flow calculation formulate in china [6] are used to calculate as below: (1) (2) =debris flow average velocity (m/s); = the roughness coefficient of the bed; =the bed slope; =debris flow depth (m); = the concentration of debris flow , = the concentration of water ; = the concentration of debris flow solid materials.
The concentration of solid material is estimated about 2.65 m3/s.
A., Succession of desert plants on debris flow terraces, Grand Canyon, Arizona, U.S.A., Journal of Arid Environment, 36(1):67-86(1997)
Science in China Ser.E Technological Sciences Vol.46 Supp. 1-11. (2003) [4] Scott, K.V., Origins, behavior, and sedimentology of lahars and lahar-runout flows in the Toutle-Cowlitz river system.
[5] Jishan Wu, et al., Observation and Research of Debris-flow in Jiangjia Gully, Yunnan Province, Beijing, Science Press (1990).

Acknowledgements Financial supports from National Natural Science Foundation of China (50864011) and Inner Mongolia Natural Science Foundation (20080404ZD16) are gratefully acknowledged.
Adrover: Materials at High Temperatures Vol. 26 (2009), p. 31
[6] Ivana Cvijovic, Ivana Parezanovic, Michael Spiegel: Corrosion Science Vol 48 (2006), p. 980
[7] Dong Bok Lee: Journal of the Korean Institute of Metals and Materials Vol. 44 (2006), p.175
[8] Saeki I., Furuichi R., Nakamura T., Mabuchi K., Itoh M., Konno H.: Corrosion Science Vol. 40 (1998), p.191

In order to pursue beautiful outlines and luxurious decoration, a large number of high-rise buildings in Baotou pose extremely high requirements on building materials, and employ lots of modern materials, which just mark the primary reason for indoor environmental pollution.
The constant emergency of new technologies and materials weakens the application of traditional materials.
It is necessary to adjust measures to local conditions and take local traditional materials into consideration in order to solve environment pollution and energy wastes caused by new building materials.
Select and use traditional and modern materials in a combined manner when conducting construction, which not only is conducive for the application of modern materials, but also can't go so far as to waste traditional materials.
Academic Journal of Shandong Institute of Architecture and Engineering, 1995, (4)

Earth-Science Reviews. 138 (2014) 435-53
Construction and Building Materials. 115 (2016) 93-104
Construction Materials. 160 (2007) 16
Construction and Building Materials. 159 (2018) 486-98
Journal of Geological Education. 38 (1990) 16-20