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According to material balance principle, gas/water bearing height in gas reservoir with bottom water could be deduced.
According to the material balance principle and equivalent flow resistance method, the formula of Critical Producing Pressure Drop of horizontal well is deduced in gas reservoir with bottom water, which considering influence of parameters like the ratio of horizontal permeation to vertical permeation, the density difference between gas and water, the viscosity ratio of gas to water and the height of bottom water coning.
Conclusions (1) According to material balance principle and equivalent flow resistance method, combined with critical vertical velocity, calculation formula of Critical Producing Pressure Drop of horizontal well in gas reservoir with bottom water is deduced
Acknowledgements This paper was sponsored by The National Natural Science Foundation Project (50974128).
Oil and Gas Journal(1990)

Introduction The concrete is used the most construction material in civil engineering.
Experiment Materials.
Civil infrastructure system material research support at the national science foundation.
[2] Chinese institute of building material industry: Green building materials and building materials green .China Chemical in Dusty Press，2003
[5] JZ Xiao; JB Li; ZP Sun: Study on compressive strength of recycled aggregate concrete, Journal of Tongji University, 2004, 32(12): 1558-1561

Such an element is composed of thin metal sheet layers on both sides and some filling material in between (Fig. 1 - left).
The elasto-plastic material behavior of upper steel was determined by the uni-axial tensile test.
Kuzman: Journal of Mechanical Engineering, no.7-8, vol. 55, (2009), p. 423 [3] J.M.
Vižintin: Journal of Mechanical Engineering, vol. 54/4, (2008), p. 266 [6] J.
Davies: Lightweight sandwich construction, Malden, MA, Blackwell Science, 2001.

Introduction Aluminum alloys are widely used as raw materials in the areas of aerospace, mechanical manufacture and motor industry for excellent properties such as low density, high specific strength, and good conductivity of electricity and heat.
Zhou: Materials Review, Vol.24 (2010), p.132-135.
Journal of Thermal Spray Technology, Vol.20 (2010), p.336-343
Dai: The Chinese Journal of Nonferrous Metals, Vol.17 (2007), p.1266-1272.
Wang: Material wear and abrasion resistant material (Northeastern University Press, Shenyang 2001).

Science & Technology Information 2012(11): 380, 393, 394
Chinese Journal of Engineering Geophysics. 2009, 6(1): 105-110
Chinese Journal of Geotechnical Engineering. 2003, 25(3): 283-287
Chinese Journal of Rock Mechanics and Engineering2013(z2): 4183-4189
Journal of Tongji University (Natural Science) 2012, 40(11): 1603-1607, 1653.

Structures, materials, manufacture techniques are three important direction for the automobile lightweight, so using topology optimization and size optimization in the body structure, and the use of low density and high strength materials such as aluminum and other lightweight design methods have become the mainstream [1] .
Chinese Engineering Science, 2009, 11(9): 20-27
Materials for Mechanical Engineering (in Chinese), 2012, 36(7)：67-71
Journal of Mechanical Engineering (in Chinese), 2013, 08: 136-142
Chinese Journal of Automotive Engineering (in Chinese), 2013,01:15-21

Sarma has proposed the limiting equilibrium methods of slices that obliquely slices the sliding mass and taken account of the failure criteria of the material on inter-slice boundaries [2, 3, 4].
The example Slope 2, as shown in Figure 3, has a weak layer underneath, and the material parameters of upper and lower soil layer and the weak layer are presented in Table 4.
Acknowledgements This work was financially supported by the Ningxia Natural Science Foundation (NZ0515) and the National Natural Science Foundation of China (50568003).
(John wiley and Sons, New York 1973),.p.47 [7] M.C.Yang:Chinese Journal of Rock Mechanics and Engineering.
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Introduction Remanufacturing can strongly be classified as a new era of profitability as it helps in reducing the demands for raw materials and energy to produce units.
In a different work, a comparison of the original manufacture with the remanufacture of components from a typical Caterpillar diesel engine was described by [9] in two measures of environmental performance: energy and material usage.
[13] Chao-Ton Su, Pa-Chun Wang, Yan-Cheng Chen , Li-Fei Chen, Data Mining Techniques for Assisting the Diagnosis of Pressure Ulcer Development in Surgical Patients, Journal of Medical Systems. 36 (2012) 2387-2399
[14] Masayuki Itagaki, Eri Takamiya, Kunihiro Watanabe, Takanori Nukaga, Fumio Umemura, Diagnosis of Quality of Fresh Water for Carbon Steel Corrosion by Mahalanobis Distance, Corrosion Science. 49 (2007) 3408-3420
[15] Yixin Chen, John Phillips, ECU Software Abnormal Behavior Detection Based on Mahalanobis-Taguchi Technique, SAE International Journal Passenger Cars-Electron Electric System. 1 (2008) 474-480.

Modeling of finite element Selection of element and constitutive relation of material.
The steel material is the common Q235 whose elastic modulus is 2.06×105MPa and Poisson's ratio is 0.3.
References [1] Shaofan Chen, Journal of Building Structures, 2002, 23(1) (in Chinese)
[3] Ji Chen, Stability Theory and Design of Steel Structure, Peking: Science Press, 2008(in Chinese)
Tests of fixed-ended plain channel columns[J].Journal of Structural Enginering.

But the scrap phosphor was only required to make as low value construction material.
[4] Cheng Peng, Zhou Bin, Jiangsu Environmental Science and Technology.
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