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Materials Five types of foaming agent, including amine LH-1 from Jinan Nuowei Chemical Company，China, CS-1 synthesized in laboratory, CS-2 synthesized in laboratory, JS-1 from Henan Daochun Chemical Company, China, FL10 from Hunan Yose Chenzhou Chemical Company, China, were used in screening tests to foam.
Acknowledgments It is a project supported by National Natural Science Foundation of China (No.51174221), Science Funds for Distinguished Young Scholar of Shandong Province (No.JQ201013), and Program for New Century Excellent Talents in University (No. 20110226).
Journal of Southwest Petroleum University(Science & Technology Edition) Vol. 19(1997), p. 35 [6] Guo Zhiwei, Xu Changxue, Lu yao, Zhou Lizhuang: Foamability and stability of foam and means of evaluating Vol. 127(2006), p. 51 [7] Sheng Qiang, Guo Ping, Cheng Jing, Du Jianfen, Wang Yuhua: Research on visual characteristics of foam in porous media.

From the above analysis, it can be seen, the open circuit voltage, the short circuit current and the conversion efficiency of the photovoltaic cell relates to substrate material and emitter doping concentration, etc.
Under same conditions PV cells and CMOS devices of preparation material parameters, the PV cells are designed and its conversion efficiency is 9.43%.
Acknowledgments The authors thank National Natural Science Foundation of China （No.61271159）and Applied Basic Research Foundation of Yunnan Province of China (No. 2011FB088) and the Research Foundation of Chuxiong Normal University of China(No.10zd03) for their financial supply.
Japanese Journal of Applied Physics. 38 (1999) 6947-51 [5] J.
Men., Semiconductor physics, Science Press, Beijing, January 2005 [8] F.

From the scanning electron photomicrograph shown, the weak flushing samples are filled uniformly by the cement and interstitial material, the more fine grains can be seen in the pore.
While the strong washing sample are filled unordered by the cement and interstitial material, what enrich in the part of small pore throat, and the large pore throat had been flushed clearly, the big pore channel exists obviously.
Journal of Petroleum Science & Engineering. 2012. 81: p.100-111
[2] Gao Chunning, An Xiaoping, Zhu Shengju, Wu Pingcang.Changing characteristics of ultralow permeability reservoirs during water flooding operations Petroleum Science 2013.02:p.226-232
Xinjiang Petroleum Science & Technology. 2012. 22(1):p. 15-17 (in Chinese)

The Research on Rational Proration to Low Yield and Pressure Gas Well in Tight Gas Reservoir Deng Sheng Lei 1, a, Zhi Lin Qi 2,b 1 Chongqing University of science & technology, ChongQing, China 2 Chongqing University of science & technology, ChongQing, China aLeids@163.com, bQizhilin76@sina.com Keywords: tight gas reservoir; low yield and low pressure gas wells; rational proration; optimization of working system Abstract.
Base on the seepage law of tight gas reservoir, using different method of rational proration, through classifying the low yield and low pressure gas wells, this paper develop a method of rational proration of being fit for low yield and low pressure gas wells in tight gas reservoir The analysis of normal rational proration method There are many method of normal rational proration, including gas production curve method, optimization proration method, material balanced method, production history overlay method, numerical model method and thumb rule, etc There are different benefits and disadvantages in above-mentioned rational proration methods.
The reservoir pressure used in the material balanced method is average value of whole gas reservoir, which neglects the difference of different region in the whole gas reservoir caused by aeolotropism of physical property in gas reservoir and of cumulative gas production.
Acknowledgements This work was financially supported by the National Natural Science Foundation of China (50974142).
Journal of Southwest Petroleum Institute, 2000, 24(2):131-133

Material and method 2.1.
The octagonal-ring material used in this paper is 40Cr, whose σs value is 785MPa.
Acknowledgements This work is sponsored by the National Science and Technology Support Project (No. 2011BAD20B09-13) and the science and technology project of Changchun city (Contract No. 2011106).
Journal of Nanjing Forestry University (Natural Sciences Edition). 32(2008.4) 121-124

Improvement and Research of Lean Production in Car-seat Assembly Line Li Yue1, a 1 School of Manufacturing Science and Engineering, Southwest University of Science and Technology, Mianyang, China a549151194@qq.com Keywords: Leap Production; value stream mapping analysis; process flow analysis; continuous improvement Abstract.
Pull Production Management Improvement of the Production System From the value stream mapping current situation analysis, the production cycle of the car-seat assembly system is 14.635 days, among which assembling the finished products only needs 0.635 day, purchasing raw materials and carrying back to company warehouse consumes 7 days and delivering the finished products to customers also consumes 7 days.
Namely before the production of car seat, the warehouse should keep as much as 14-day’s production materials to ensure one week’s safe stock, for half of the 14-day’s production materials would be used during the 7-day period from the production of the car seat to the transporting of the ordering from the suppliers to the warehouse.
Ensure the material be supplied within one day.
[6] Ni Ji-zi; Kan Shu-lin; and Shen Jun, “System Optimization of the Padlock Body Production Based on Value Stream Mapping,” Industrial Engineering Journal, vol.14, no.4, Aug. 2011, pp.139-144

The materials used vary based on the required applications, some of which are listed in Table 1.
For most materials when the velocity increases, friction decreases and when duration of contact increases, friction increases.
Temperature has a strong influence on material properties like strength of materials.
Schey, Tribology in Metal Working: Friction, Lubrication and Wear, Journal of Applied Metalworking, Volume 3, Issue 2, Page 173 (1984)
Wayne Jones, Particle size, Volume fraction and matrix strength effects on fatigue behaviour and particle fracture in 2124 Al-SiC composites, Materials Science and Engineering: A, Volume 183, Issues 1-2 (1994)

Materials and Methods The ASTM F 75 alloy gas atomized used in this study was supplied by HighBond®.
Journal of the Mechanical Behavior of Biomedical Materials., 12, Agosto 2012. 83-92. [6] M.
Dental Materials, 27, n. 4, 2011. 356-363. [8] INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.
Dentistry — Metallic materials for fixed and removable restorations and appliances.
Materials Science and Engineering C, 2015. 263-269.

The foundation concrete material was assumed to be isotropic linear elastic material, while adopting the Drucker-Prager materials to simulate the nonlinear characteristics of soil (Table 1).
Acknowledgements This work was financially supported by the China National Natural Science Foundation (104972166).
Housing Materials & Applications ,33(6): 37-39 (2005)
Journal of Sun Yat-sen University,41 (2): 93 ~ 95 (2002)
South China University of Technology (Natural Science Edition), 23 (3): 84-89 (1995).

Therefore, there has been increased interest in the last years in the use of low-cost, easily available materials for the adsorption of chromium from wastewaters.
Exiperimental Materials.
It could be seem from the table 5 that, the hazardous materials(such as Cr(III)) was removed by the adsorption process, and the CODCr of the wastewater was significantly reduced as well.
Heavy metal adsorption onto agro-based waste materials: a review, J.
Journal of Applied Polymer Science, 84 (2002) 478-485