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Case Study on Economic Evaluation of Biogas Project in Large-scale Pig Farms Wenlin Ma 1, 2,a , Xueqin Li 1, 2,b and Bolin Deng3,c 1Beijing climate change response research and education center, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China 2 Department of environment science and engineering, School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China 3 Beijing Animal Science and Veterinary Medicine Service, Beijing, 100107, China amawenlin1130@126.com, blixueqin_lxq@126.com, cdbl28@sina.com Keywords: biogas project; economic benefits; large-scale pig farms; cost benefit analysis Abstract: A case of a biogas project built in a large-scale pig farm in Beijing was studied in this paper.
Its feed solids concentration is 8%, and residence time of materials 25d, daily biogas output 800 m3, ferment residual 12t.
After-treatment Farmland use or discharge Energy use for production and living Gasholder Purification Anaerobic digester Pre-treatment Biogas Manure Residual Organic fertilizer Slurry Fig.1 Process diagram of biogas project Investment for the project Construction costs of biogas project include direct material costs (such as building materials and equipment), direct labor costs (such as wage of technicians, unskilled laborer, handyman) and manufacturing costs (consisting of utilities and accommodation expenses during building activities).
Wang, Xing Su and Yanfen Tang: submitted to Transactions of the CSAE (2008) .In Chinese [6] Yunzhang Tu and Zaoliu Wu: submitted to SOLAR ENERGY (2012) .In Chinese [7] Lizhi Zhu and Han Ye: submitted to CHINA POPULATION, RESOURCES AND ENVIRONMENT, (2012) [8] Jian Wu and Feng Li: submitted to Journal of Anhui Agri.
Sci (2008) .In Chinese [9] Yongxin Hua and Jianping Zhu: submitted to New Energy and Technology (2004) .In Chinese [10] Wenhao Liu, Baogui Zhang and Li Chen: submitted to Renewable Energy Resources (2012) .In Chinese [11] Bin Lin, in: Theory and practice on development of biogas projct of biomass energy , edited by China Agricultural Science and Technology Press, China, Beijing (2010), in press

The reasons are probably that debris flow is weakening in force or intensity and the supply of material source is becoming gradually less and fine, or it resulted from gravity differentiation[23].
Acknowledgments This study was supported by the National Natural Science Foundation of China (No. 40238059) and the special grand national science-technology project of china (No. 2008ZX05023).
Li: submitted to Journal of Hydrodynamics Ser.
Gong: submitted to Earth Science (Journal of China University of Geosciences) (2004) (In Chinese)
Shanmugam: submitted to Earth-Science Reviews (2002).

Method Material Three kinds of soil, clay, loam and sand were considered and taken from Hunan province in china.
Acknowledgements This study received financial support from the Key Study Project of National Natural Science Foundation of China (50939006), the National 973 Program of China (2006CB403404)，the Key technologies of “Three Red Lines” management in river basin based on the water cycle and its accompanying process (2013ZY02), the Study on Water Ecological Civilization Construction Based on Dualistic Water Cycle and Associated Process Integrated Simulation (2013QN02), and the Creative Research Group Fund Project of National Natural Science Foundation of China (51021006).
Journal of Hydrology, 2006, 324: 10-23
Stratified soil infiltration characteristics during rainfall.Journal of Soil and Water Conservation,2012, 25(5):217-219, 223
Advances in Water Science, 2012, 23(1): 59-66

Shenyang institute of automation of Chinese academy of sciences and Beijing Institute of Technology have studied the transmission of navigation system and motion planning problem respectively.
In order to simplify the calculation of the system, the analysis of the moment of inertia is as follows: 1) The DC servo motor plays a leading role to the moment of inertia, and it occupies a large share in the whole system. 2) The transmission device and the gear mechanism are usually made of aluminum material, the value of inertia converted onto the motor axis is small.
Acknowledgements This paper is supported by the National Science Fund for natural youth (61105099), Shenyang city science and technology project (F12-277-1-70).
Journal of Interventional Cardiac Electrophysiology, 21(1), 19-26
International journal of computer assisted radiology and surgery, 2009, 4(4): 307-315

Study on Mineral Blending Models for Poly-metallic Open-pit Mine Li Dia, HU Nai-lianb, Li Guo-qingc, Gong Jiand State Key Laboratory of High-Efficient Mining and Safety of Metal Mines (University of Science and Technology Beijing), Ministry of Education, China: Beijing, 100083 alidilidi6@sina.com, bhnl@ustb.edu.cn, cqqlee@ustb.edu.cn, dgjd8722@163.com Keywords: mineral blending; poly-metallic deposit; multi-objective model solving Abstract.
The recovery rate of copper and molybdenum is 85% and 70% according to the data material in this mine.
Aknowledgement Supported by the National Natural Science Foundation of China (Grant No. 51104010) Supported by the Fundamental Research Funds for the Central Universities (Grant No.
Journal of University of Science and Technology Beijing. 2002(3): 239-242
Journal of University of Science and Technology Beijing. 2010(9): 1107-1112

The particle density gradually decreases between the surface of the material and the electrode and is stable in the area of 0.08-0.1m.
Acknowledgments This study was supported by National Natural Science Foundation of China (grant no.
Journal of Vacuum Science & Technology. 2014, A 32: 021303
Journal of Physics D: Applied Physics. 2016, 49: 195203
Particle simulation methods for studies of low-pressure plasma sources, Plasma Sources Science & Technology. 2011, 20: 024001

Reverse logistics (RL) is defined as: the process of planning, implementing and controlling the efficient, cost-effective flow of raw materials, in process inventory, finished goods and related information from the point of consumption to the point of origin for the purpose of recapturing or creating value or for proper disposal [14].
European Journal of Operational Research, vol. 103, 1997, pp. 1-17
European Journal of Operational Research, vol. 138, 2002, pp. 63-75
European Journal of Operational Research, vol.188, 2008, pp. 109-120
European Journal of Operational Research, vol. 95, 1996 pp. 313-324

Dózsa Hungarian Academy of Sciences Research Institute for Technical Physics and Material Sciences, H-1525 Budapest Pf. 49.
I have published some of the investigations in the DX doped materials [1,2], but basic results went to the drawer, DX went out of fashion, and I gave up the efforts of their publishing.
The capacitance of DX doped materials is dominated by a wide transition layer at the depleted layer edge.
To help to better classify the `DX`-like defects in different materials we suggest to apply the techniques presented in this work..
Kristofik Journal of Appl.

Isothermal extrusion study and simulation of magnesium alloy For hilt of electric screwdriver Chuntian Li1, a, Chang Wang2, b, Yamin Hu1, c 1College of Material Science and Engineering, Chongqing University of Technology, No.69 HongGuang Road, Ba’nan district, Chongqing, P.R.
Preface Magnesium alloys have wide applications in automobiles, aerospace; communication industry and so on due to it is the lightest alloys in the structural materials of metal.
Its material is AZ31D Magnesium Alloy.
Materials Review, 2000, 14; 53-56
The latest progress and prospects of Mg alloys [J].The Journals of Metal Technology.2001, 51(1); 2-13

Experiments The pre-corrosion sheet material for this study was satisfied the specifications for the LC4 designation.
The 3D models adopted linear material model with a Young’s modulus of elasticity (E) 71.7 GPa and a Poisson’s ratio of 0.33 in the LMS analysis.
Engineering Fracture Mechanics Vol.59 (1998), p.305 [4] American Society for Testing and Materials, U.S.
ASTM G34-01(2007) [5] American Society for Testing and Materials, U.S.
Computer Vision: Graphics and Image Processing Vol.33 (1986), p.174 [7] DuQuesnay D L，Underhill P R，Britt H J: International Journal of Fatigue Vol.25 (2003), p.371