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In the development process of nano-silicon film solar cell, whether to control the conductivity type and conductivity through doping is one of the crucial factors that determine the practicality of nanocrystalline silicon film materials.
References [1] Zhou Ruifa, Han Yafang and Chen Xiangbao: Nanometer Functional Composite Materials and Applications [M].
Journal of Functional Materials and Devices , Vol. 9, p. 25 [8] Guo Qunchao, Geng Xinhua and Zhang Jianxin: Influence of Doping on Growth of Silicon Window Layers [J].
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Journal of Dalian University of Technology Vol. 35 (1995), p.801

For the wide range of materials, plasma surface treatment process of the different materials are also many, which consists the right temperature plasma, different temperature plasma surface treatment process principle applies different materials[2].
Journal of Hubei Institute for Nationalities (Natural Science Edition).
Journal of Southeast University (Natural Science Edition).
(In Chinese) [3] Bo Zhang: Surface Modification of Materials by Low-temperature Plasma.
(In Chinese) [4] Kai ping Yu, Jinkai Mo:Research and Application on the surface plasma treatment of metal materials.

Λ value of the new super-magnetostrictive material is large, compared with traditional materials to two orders of magnitude or more.
From traditional materials of 10 ~ 100ppm up to 1000~2500ppm, which is a breakthrough[2, 3, 4].
University of Electronic Science and Technology of China, (2008)
Lecture Notes in Computer Science(1995)
Journal of Sound and Vibration(1998)

Fiber-reinforced ceramic composites are relatively promising materials in aerospace and other high-tech area.
As a non-destructive techniques, acoustic emission (AE) has been widely used to evaluate the fracture of composite materials [7-8].
Journal of Materials Processing Technology 140 (2003) 152–156
Advanced Materials Research, Vol. 569, 132-135
Damage characterization of polymer-based composite materials: Multivariable analysis and wavelet transform for clustering acoustic emission data.

Therefore, in the materials section, lighter materials and related machining process have been developed during the decades.
Jung : Materials Science and Technology Vol. 19 (2003) p.785-790 [3] J.A.
Murr : Journal of materials science letters Vol. 21 (2002) p.917-920 [4] W.B.
Jung : Journal of materials science Vol. 38 (2003) p.4183-4191 [6] S.H.
Kokawa : Journal of materials science Vol. 38 (2003) p.4379-4383 AZ91 AZ31 AZ91 AZ31

While the second type suggests that making arranged layers in each part already separated according to the materials.
From the point of composite materials, this article intends to use the layered-shell element method to simulate the multi-ribbed composite panel.
All of the materials are supposed to be isotropic.
Due to the isotropic property of the materials, the concrete and the blocks can be regarded as one layer respectively.
Pantazopoulou: Response of RC Frame under Lateral Loads, Journal of Structural Engineering VOL.117 (1991)

Materials and methods Experimental design.
Table 1 OC, ON and C/N ratio of the investigated soil and organic materials.
The mineralization rates of organic materials ranked in the order: RS>AF>MS.
The addition of organic materials increased the amount of fresh organic matter in the soil, thus MBC in the soil after organic materials treatment was significantly higher than the control.
Zhang: Chinese Journal of Soil Science.

Lai, “Recent Developments in the Fabrication of Metal Matrix-Particulate Composites Using Powder Metallurgy Techniques’, Journal of Materials Science, 29 (1994) 1999 [2] G.
Materials Prepared by Sintering and Infiltration”, Journal of Powder Metallurgy and Metal Ceramic, 40[1-2] (2001) [3] Karabi Das, T.
Bandyopadhyay, “Synthesis and Characterization of Zirconium Carbide-Reinforced Iron-Based Composites”, Materials Science and Engineering A, 379 (2004) 83 [4] Saidatulakmar Shamsuddin, Shamsul Baharin, Zulhailawati Hussain and Zaninal Arifin Ahmad, “Characterization of Fe-Cr-Al2O3 Composites Fabricated by Powder Metallurgy Method with Weight Percentage of Alumina”, Journal of Physical Science, 19[1] (2008) 89 [5] Sainatee Chakthin, Monnapas Morakotjinda, Nuchthana Poolthong, “ Influence of Carbides on Properties of Sintered Fe-Base Composites”, Journal of Metals, Materials and Minerals, 18[2] (2008) 67-70 [6] Joon-Hwan Choi, Jong-Jin Choi, Jungho Ryu, “The Effects of the Boride Particle Addition into the Matrix Alloy on Microstructure, Surface Morphology and Interfacial Resistance”, Functional Ceramics Group, Functional Materials Division, Korea Institute of Materials Science, South Korea, 2008
Materials Science and Engineering: An Introduction, John Wiley & Sons.
McKamey, “Iron Aluminde-Al2O3 Composites by in situ Displacement Reactions: Processing and Mechanical Properties” Materials Science and Engineering A, 254 (1998) 119 [13] R.

Example 1 For graphite / epoxy materials , we set The restrict condition is four simply supported edges, laying angles are respectively a/h=10, introducing dimensionless inherent frequency, calculation results see Table 1 .
The material density is 1600kg/m3, ply angle are .
[2]Jones R M.Mechanics of composite materials[M].
Journal of composite materials,1990,7(2):99-109
Journal of composite materials,1986.3(2):64-73 [18] Reddy J .

The reason may be that organic materials degraded by bacteria in MBBR were almost removed in 9 hours.
Acknowledgments This research was financially supported by Science Fund of Heilongjiang Provincial Education Department (RD: 12511489) and Research Fund of Heilongjiang Institute of Science and Technology (RD: 06-19).
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Journal of Environmental Protection, 1(2004), P. 20-23(In Chinese) [4] Luo Yijing, Zhang Zhongzhi and Zhao Shuying.
Journal of oil chemical higher school, Vol. 16(2003), P. 9-13(In Chinese) [5] Yi Shaojin, She Yuehui, etc.