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Thus satisfies the following equation for shearing force as in textbooks of the strength of materials[7]: This expression shows that the reverses its sign once only at the acting point of respective concentrated forces, so it reverses its sign not more than times, all in the interval .
Acknowledgment This work is supported by National Natural Science Foundation of China (No: 10772001) and the Key Program of the Education Department of Anhui Province (No.
[2] Qishen Wang, Lei Wu, Dajun Wang, Acta Mechanica Sinica (in Chinese),Vol 41(6)(2009), p. 947-952 [3] Qishen Wang, Dajun Wang, Lei Wu, et al, QJMAM, Vol 64(1)(2011), p.75-86 [4] Qishen Wang, Journal of Anqing Teachers College (Natural Science) (in Chinese), Vol 2(4) (1995), p.32-39 [5] Norrris, C.
[7] Timoshenko S., Gere J., Mechanics of Materials, (Van Nostrand Reinhold Co., New York, 1972).

Journal Citation (to be inserted by the publisher) Copyright by Trans Tech Publications Steam Gasification Characteristics of a Pine-nut Shell in a Thermobalance and a Fluidized Bed Reactor Seon Ah Roh 1, Sung Real Son 1, Sang Done Kim 1,*, Woon Jae Lee 2 and Yong Kuk Lee 3 1 Department of Chemical & Biomolecular Engineering and Energy & Environment Research Center, Korea Advanced Institute of Science and Technology, Daejeon, 305-701, Korea 2 Ironmaking Research Group Coal Research Team, POSCO Technical Research Laboratories, Pohang, 790-785, Korea 3 Energy Research Team, Research Institute of Industrial Science and Technology, Pohang, 790-330, Korea *Corresponding author : kimsd@kaist.ac.kr Keywords: Biomass, pine nut shell, fluidized bed reactor, steam gasification, thermobalance.
In this present study, a pine nut shell was used as a gasification material for the production of fuel gas.
The design and operation of gasifiers requires knowledge of the reactivity of the raw material to be processed with a given reactant gas.
At the beginning of the experimental run, the electric heater was turned on to heat the bed material (sand particles, dp= 0.25mm) with an air feed.
Experimental conditions and analysis of the pine nut shell Experimental conditions Pine nut shell Ranges Proximate analysis wt% Ultimate analysis wt% Bed material (Sand, mm) Bed temperature (oC) Gas velocity Uf/Umf (-) fuel feed rate (kg/hr) Steam/c ratio (-) Air/fuel ratio (-) 250 700 - 850 2 - 4 1 - 3 0.5 - 1.1 0.16 - 0.32 Volatile matter Fixed carbon Ash Moisture Heating value (cal/g) 77.52 21.95 0.53 8.69 4595.29 C H O N S 49.40 6.90 43.34 0.33 0.03 The shrinking core, volume-reaction and modified volume-reaction models have been examined to interpret the conversion-time data of the combustion and the steam gasification of the pine nut shell char [5,7].

Materials and methods General situation of research areas Qinglai city lies southwest of Chengdu plain, there are 65 kilometers from city center to Chengdu city.
Fig.6 Trend chart of the development of large-scale biogas projects in recent years in Qionglai city Fig.7 Chart of distribution proportion of different scaled biogas projects in Qionglai city The biogas plants also can be clarified three kinds according to kinds of scaled pig farms (Fig.7): small scale biogas plants (50~100 m3, accounting for 15%, construction cost 660 yuan/ m3 (including materials fee, laborage, design fee, the same as follow)); middle scale biogas plants (100~600 m3, accounting for 81%, construction cost about 620~640 yuan/ m3); large scale biogas plants (over 600m3, accounting for 4%, construction cost about 620 yuan/ m3) Problems of scaled biogas projects in construction As a way to dispose livestock manure, scaled biogas technic could improve agricultural eco-environment.
Acknowledgements This work was financially supported by Major Projects for Science and Technology Development (2009ZX07425-003).
Sichuan agricultural science and technology, Vol. 10 (2008), p. 42-43.
Journal of Agricultural engineering, Vol. 20 (2004), p.287-292.

Research on Fault Recognition for Centrifugal Compressor using Entropy Weight-based Gray Relational Analysis Lanyun Li1,a, Zhuanzhao Yang2,b, Xiao Li1,c, Zhi He 1,d 1 Key Laboratory of Materials Processing Engineering, School of Materials Science and Engineering, Xi'an Shiyou University, Xi'an, Shaanxi, 710065, P.R.
Journal of Central South University (Science and Technology), Vol.40, No.3 (2009), pp.706-710

Journal Citation (to be inserted by the publisher) Copyright by Trans Tech Publications Improvement of Silver Recovery Efficiency by High Speed Rotation A.
Park5 1,2 Department of Materials Science, Simon Bolivar University, Caracas, Venezuela 3 Department of Materials Engineering, Sun Moon University, 336-708, Chungnam,South Korea 4 Surface Finishing Research Center, Hae-Song P&C,429-849 Shihung, South Korea 5 Department of Cleaner Production Technology, Kyonggi Institute of Technology,429-792 Shihung, South Korea Keywords: Silver Plating, Silver Recovery, Electrowinning Abstract.
[4] Electrowinnig, Institute of Advanced Manufacturing Sciences Inc, Center for Applied Environmental Technologies, USA, 1999

Journal Citation (to be inserted by the publisher) Copyright by Trans Tech Publications Atomic Force Microscopy of Self-Assembled Nanostructures of TPPS4 on SAM Substrates R.
Materials and Methods The J-aggregate solutions were prepared by dissolving meso-tetra(4-sulfonatophenyl)porphine (TPPS4) tetrasodium salt in acidic aqueous medium (pH 1 was reached by adding HCl).
Acknowledgments The project was supported by a research grant (K-072) awarded from the Lithuanian State Science and Studies Foundation.
We also thank the Biomimetic Materials Science, “BIOMICS” programme (SSF) for support.

Material and Methods The phosphate ore sample used in this study was provided by Bunge Fertilizers Brasil SA, located in Araxá, Brazil.
The wash water (0.15 L/min) was turned on and the floated material was collected until the froth was ended.
Barrozo: Brazilian Journal of Chemical Engineering, Vol. 22 (2005), p. 143
Barrozo: Materials Science Forum Vols. 591-593 (2008), p. 805
Bulatovic: Handbook of Flotation Reagents: chemistry, theory and practice: flotation of sulfide ores, Vol. 1, (Elsevier Science 2007), p 458.

Build A"Computer Network Technology"Teaching Model Based on Work Process Xiaoming Bi 1, a, Chunru Xiong2,b and Qiansheng Zheng 1,c 1Wenzhou Vocational College of Science and Technology, Wenzhou, Zhejiang, 325006, China 2Electrical Engineering Department, XinYu College, Xinyu, Jiangxi, 338000, China awzkzybxm@126.com, bxcrmcu@163.com, c58666300@qq.com Keywords: work process; teaching model; computer network.
According to job skill requirements and students’ cognitive psychology process, and with the idea of integrating science and practicality in one, we analyzed and summarized the courses content.
Mishing, in: Diffusion Processes in Advanced Technological Materials, edtied by D.
Clem: submitted to Journal of Materials Research (2003)

The pipes of groundwater monitoring wells adopted rigid PVC material, the following settings in the water table filters and filter screen were installed below water level, the 5mm diameter of gravels were filled around the filter screen, the gravel thickness was about 5cm, the bottom of well was sealed with plug.
Acknowledgements This work was financially supported by the Xinjiang Natural Science Foundation for Young Scientists, No. 2010211B23, Western Doctor Special Funds of Chinese Academy of Sciences, No.XBBS200904 and The research projects of the Tarim Branch of PetroChina Company Limited, No. 971010050002.
Groundwater science, Academic Press, New York, 2002
[9] Zhenda ZHU, Zhiping CHEN, Zheng WU, Study on Aeolian Geomorphology in Taklimakan Desert, Science Press, Beijing, 1981.
(in chinese) [10] Lin JIANG, Peichen LI, Jianqing GUO, Hydrochemical Characteristics and Evolution Laws of Groundwater in Typical Oasis of Arid Areas on the West of Helan Mountain, Journal of Earth Sciences and Environment. 3 (2009) 285-290.

Deformation Measurement of an Inflatable Reflector Using Digital Image Correlation Guochang Lin1,a, Huifeng Tan1,b and Xianghong Bai1,c 1Key Laboratory of Science and Technology for National Defence, Harbin Institute of Technology, P.O. 3011, No.2, YiKuang str.
Application of Similar Material Simulating Experiment Based on DICM.
Journal of Experimental Mechanics.