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Heat loss calculation of digester (1) Required heat of digester heating raw materials[6] (5) Where c is the specific heat capacity of feed liquid (mass fraction of fresh feed liquid is about 8%, could approximately takes the specific heat of water), 4.2kJ/(kg·℃); m is the volume of fresh feed liquid that daily into the digester；TD is the temperature of feed liquid in the digester fermenter tank, 37℃; TS is the temperature of the fresh feed liquid, 20℃.
Table 2 Costs of input production Solar collectors Biogas digesters Supporting devices Esternal wall insulation Costs of raw material Annual maintenance and management fees Total investment cost ￥3500 ￥1500 ￥500 ￥4400 Offset by Biogas ￥100 ￥10000 Output efficiency When the system operates stability, daily output biogas is 1.5m3, the result is that the efficiency of coal-fired furnace is 60%, the thermal efficiency of gas stove is 75%, the average heat value of biogas is 22.935MJ/m3, the heat value of standard coal is 29300kJ/kg, and the price of the standard coal is 1.2yuan/kg.
Table 3 Efficiency of output Biogas proceeds Efficiency of supply heating, supply hot water in heating period Efficiency of supply hot water in non-heating period Biogas manure income Annual net income ￥640 ￥2400 ￥235 Offset by Raw materials costs ￥3275 Calculation According to the above calculation and economics formula, the calculation of economic benefit analysis is shown in Table 4.
Acknowledgements This work was supported by Key Technologies R&D Program of China (2011BAD15B03), Longyuan Youth Innovative Support Program (09-0165), Construction Science and Technology Development Program of Gansu (JK2010-29), Tamarisk Outstanding Talent Program of Lanzhou University of Technology(Q201101).
Journal of Agricultural Mechanization Research, 2008, 7(30):204～20.

Any change in the coating material is rapidly detected by monitoring a non-stationary current signal passing through the coating material due to a square wave excitation source of high frequency.
Frit the basic material of the enamel slip is applied on aluminum panels to produce the enamel coatings.
Interpretation of these spectra reveals details of the effectiveness of the coating material and the evolution of the deterioration process [10].
Matthews, EIS comparison on corrosion performance of PVD TiN and CrD coated mild steel in 0.5N NaCl aqueous solution, Corrosion Science 43, 2001, 1953-1961
Williams, Amaratunga, Introduction to Wavelets in Engineering, International Journal for Numerical Methods in Engineering, Vol.37, 2365-2388 (1994)

Introduction Cellulose, a homogeneous polymer of b- (1, 4) glucose, one of the most plentiful renewable resources on Earth, is widely used in the field of paper-making, textile, functional materials and chemicals.
These extreme conditions can drive chemical reactions such as oxidation, reduction, dissolution, and decomposition, which have been exploited to prepare a variety of nano materials [8-12], such as nanocrystalline ZnO [8] , nano-sized lithium cobalt oxide [9], cobalt nano-particles [10], MoS2 nanorods [11] and many other nanoparticles [12].
Experimental Materials.
Acknowledgements This work was financially supported by National Nature Science Foundation of China (No.50573022) and the “973” Key Foundation of China (No.2010BC732206).
Morikawa: Japan Tappi Journal.

There are many scholars studying the ultrasonic nondestructive testing of spot-welded joint[1,2,3], but the ultrasonic non-destructive testing technology for testing spot welding quality has not achieved the satisfactory effect so far, especially in the test and identification for hazardous defect (for example, false welding), because the ultrasonic wave in the different materials has different propagation characteristics as well as its complexity of ultrasonic technique. 00Cr18Ni10N is a new type of ultra-low carbon and high strength austenitic stainless steel, which is characterized with high strength, good toughness, corrosion resistant and extensive applicability in the field of engineering.
Because the differences of density and speed of sound between the welded nugget and base material is less than one in a thousand, if the appreciable reflection is not generally produced from the interface of the welded nugget and base material, it indicates that this area locates inside the welded nugget and the developed columnar crystals in the nugget has a great influence on the ultrasonic attenuation; the amplitude of transmitted ultrasonic wave shown in Fig. 2e) becomes lower while the secondary transmitted wave hardly exists, from which it can be inferred that there could lie in the center of nugget and columnar crystals could be bulky.
The microstructure and appearance of false welding joint are similar to those of the base material, and density and speed of sound of false welding joint is almost same with those of the base material, so there isn’t a strong ultrasonic attenuation effect during the transmission. 1mm Fig.5 The Macrophotograph of the Specimen 2 3.3 Comparative Analyses of Test Results about Specimen 1 and 2.
Acknowledgements The authors would like to thank for the financial support from the National Natural Science Foundation of China through document 51275418.
Sonat , Ultrasonic examination of resistance spot welds, The e-Journal of Nondestructive Testing Ultrasonic. 8(2003)26-30

So it has some practicality value to study this material.
Coating material is Al-10%Si。
Lou, Journal of Chinese Society for Corrosion and Protection, 5 (1997) 464~469
Xiang, Transactions of Materials and Heat Treatment, 28 (2007) 130-133
Wu, science of the surface engineering.

Methods and Materials Methane oxidation was determined with the stable isotope (13C) technique as a function of methane emission rate.
(eds.): Climate Change 2007: The Physical Science Basis.
Stern, Characterization of methane flux and oxidation at a solid waste landfill, Journal of Environmental Engineering. 132 (2006) 220-228
Hater, Improved field methods to quantify methane oxidation in landfill cover materials using stable carbon isotopes, Environ Sci Technol. 42 (2007) 665-670
Green, Effect of temperature and oxidation rate on carbon-isotope fractionation during methane oxidation by landfill cover materials, Environ Sci Technol. 42 (2008) 7818-7823

Putting Cement to Sleep with Sucrose and Waking it up with Ca(OH)2 Xiaofan Panga, Ziming Wangb, Heqing Shenc and Long Xued Department of Materials Science and Engineering, Beijing University of Technology, No.100 Pingleyuan, Chaoyang District, Beijing 100124, China.
Materials and Methods Materials.
Journal of the Chinese Ceramic Society, 1998, 26(2):164-170

Forecasting energy consumption has been the focus of numerous scientific efforts undertaken, inter alia, by the Institute of General Energy of the National Academy of Sciences of Ukraine [3].
One of the most efficient and large-scale options for curtailing energy consumption is to improve energy efficiency of the manufacture of goods in the economic sectors, in particular, to retrofit manufacturing machinery, reduce energy losses; improve the quality of products, and reduce losses of raw materials.
The recourses can be divided into material, non-material and human.
One of the most efficient and large-scale options for curtailing energy consumption is to improve energy efficiency of the manufacture of goods in the economic sectors, in particular, to retrofit manufacturing machinery, reduce energy losses; improve the quality of products, and reduce losses of raw materials.
[7] Snowdon, B., Stonehouse, G. (2010), "Competitiveness in globalized world: Michael Porter on the Microeconomic Foundations of the Competitiveness of Nations, Regions and Firms", Journal of International Business Studies, №. 2(37), pp. 163-175.

Yang 4,d 1 ,2 National Taiwan University, Taipei, Taiwan, ROC 3,4 Technology and Science Institute of Northern Taiwan, No. 2, Xueyuan Rd., Beitou, 112 Taipei, Taiwan, ROC a liaoys@ntu.edu.tw,b D90522007@ntu.edu.tw,c ycchung@tsint.edu.tw,d tyyang@tsint.edu.tw Keywords: corona ignited micro-discharge welding (CIMDW), microwelding, plasma, microtechnology Abstract.
A Lloyd Material Testing Machine is used for the tests.
Li : Journal of Materials Processing Technology 138(2003) p.102-108 [3] V V Semak1, G A Knorovsky2 and D O MacCallum :J.
Zhou: Volume 35A, Metallurgical and Materials Transactions A October (2004) p. 2165-2176
Panella: Materials and Design 31 (2010) p.176-184 [9]T.Konno, M.Egashira, M.Kobayashi and N.Shinya: Proceedings of SPIE Vol. 3990 (2000 ) [10]Howard B.

Toughness Properties of Concrete Modified with Water-borne Polyurethane Bei Ding1, a, Xia Zhang2, b, Dongling Zhou2, c and Chanwen Miao3, d 1Jiangsu Research Institute of Building Science, Nanjing, China 2 Jiangsu Bote New materials Co., Ltd., Nanjing, China 3The National Key Laboratory of High Performance Building Materials, Nanjing, China adingbei@cnjsjk.cn, bzhangxia@cnjsjk.cn, czhoudongliang@cnjsjk.cn, dmcw@cnjsjk.cn Keywords: water-borne polyurethane; concrete toughness; fracture energy; early plastic cracking resistance; impact resistance.
The following materials and mix proportions were utilized to form concrete.
Admixtures: polycarboxylic acid superplasticizer and polyether defoaming agent were purchased from Jiangsu Bote New Materials Co., Ltd., China.
The shape of curve is still a typical characteristc of brittle materials, whether modified by PUA or not.
[4] Yoshihiko Ohama, Recent progress in concrete-polymer composites, Advanced Cement Based Materials, 5 (1997) 31-40