Search results

In addition to traditional course materials such as videos, readings, and problem sets, MOOCs provide interactive user forums that help build a community for the students, professors, and teaching assistants (TAs).
The present E-learning platform is mainly a display platform for learning resources, which enables the users to watch online or download learning materials, but lacks online curriculum services support, follow-up knowledge construction and feedback mechanism.
Journal of e-learning, 2(2), pp. 273-280, 2004
[2] http://en.wikipedia.org/wiki/MOOCs [2013-12-18] [3] http://www.cnielts.com/VOA/117524.html [2013-12-18] [4] http://www.lib.uchicago.edu/e/about/mvv.html [2012-1-20] [5] Chen Feng, Educational Resources Construction of University Library under E-learning environment, Journal of Library Science, (05), pp. 49-51, 2011
[6] Liu Ying, Library services in the new model of online teaching, Journal of Library Science, (07), pp. 104-106, 2011

Journal of Tribology, 2008, 130(2): 1-8
Journal of Shandong University of Technology (Sci&Tech), 2003, 17(3): 100-102
Journal of System Simulation, 2007, 19(23): 5473-5476
Technology of Magnetic Flywheel Energy Storage[c]// International Conference on Manufacturing Science and Materials Engineering, October 14-15, 2011, Shanghai, China: 1055-1059
Journal of Mechanical Engineering, 2011, 47(13): 104-112.

In surface modification technology, hard materials such as ceramics are coated onto the surface of another material.
However, in the concept of the design of a multilayer coating system, not much information is available in the open literature on "suitable" constituent materials to be chosen as the inner layer, intermediate layer(s), and outer layer [4].
Fujiwara: International Journal for Manufacturing Science & Technology Vol. 5, No. 2, 2003/2004, p. 39
[3] Tadahiro Wada: “Cutting Performance of Diamond-Like Carbon Coated Tool in Cutting of Aluminum Alloys,” Materials Science Forum Vols. 638-642(2010), p.368
[5] Tadahiro Wada: “Cutting Performance of Diamond-Like Carbon Coated Tool in Cutting of Aluminum Alloys,” Material Science Forum Vols. 638-642 (2010), p.368.

Introduction [1] With the modern industry’s rapidly development, the energy crisis has become a serious problem that the humanity must face. how to analyze the energy of constructions especially construction materials is a key issue for construction’s sustainable development.Concrete is the world's largest amount of construction materials.Varies studies have carried out to discuss concrete’s environment impact,but the energy consumption data is confused,few research had paid attention on the concrete’s energy calculation method.
(2) Ei,j: the energy consumption of the ith material’s jth production process μi :the rate of the ith material loss Calculation Model of construction stage energy consumption (Ec) In this stage,the materials will be mixed,transported,poured,vibrated and cured,these processes’ energy increases together to be the main construction energy consumption(Emc).The temporary facilities and lighting energy in the construction should be considered,too.
(4) Emm: the energy consumption of the materials during maintenance stage, the calculation see equation(2).
(5) Edd: the energy consumption of the demolish process Ead,i: the energy consumption of the ith process for abandoning Erd,j: the energy consumption of the jth process for recycling Calculation Model of transportation energy consumption (Ed) From raw material product stage to construction stage ,the transportation energy consumption must be considered, there exists the transportation of materials in the cement production process and the wasted concrete treat process, too.
Jonson, Tools and methods for environmental assessment of building products—methodological analysis of six selected approaches, Building and Environment 2000, 35 (3):223–238 [2] HOSSAM.A.GABBAR,Life cycle assessment and environmental impact analysis for green energy production plants,Proceedings of sixth international conference on machine learning and cybernetics,Hong Kong,2007:2058-2063 [3]Qi yunhui ,Huang Haihong ,Liu Guangfu,et al,Energy analysis method based on dynamic life cycle,Chinese journal of mechanical engineering,2007,43(8):129-134 [4] Wang jin, Zhang xu, Model improvement of inventory analysis on energy upstream phase based on life cycle assessment, Journal of Tongji university (natural science):2009,37(4):520-524

This work was supported by the National Natural Science Foundation of China, No. 50975043.
Xu: Key Engineering Materials Vol. 258-259 (2004), pp: 858-863
Butler: International Journal of Machine Tools & Manufacture Vol.45 (2005), pp: 1321-1328
Lal: International Journal of Machine Tools & Manufacture Vol. 37, No.6 (1997), pp: 751-761
Wani, Vinod Yadava and Atul Khatri: Journal of Materials Processing Technology Vol. 190 (2007), pp: 282-290

Materials and Methods Samples.
Ethanol was selected as the extraction solvent because it was currently widely used for the extraction of functional compounds from various natural raw materials, and was regarded as a green solvent with safe, low price, and no harmful residue left after evaporation [10].
The Journal of nutrition, 2011, 141(6): 1202-1208
Journal of Agriculture, 2011, 4: 44-48
Food Science and Biotechnology, 2012, 21(6): 1577-1584

Arunraj, J.Maiti, A methodology for overall consequences modeling in chemical industry, Journal of Hazardous Material. 169 (2009) 556-574
Naksuksakul, Risk based maintenance model for offshore oil and gas pipeline: a case study, Journal of Quality in Maintenance Engineering. 3 (2004) 169-183
Norhamimi, Relationship between soil properties and corrosion of carbon steel, Journal of Applied Sciences Research. 8(3) (2012) 1739-1747
[5] N.S.Arunraj, J.Maiti, Development of environmental consequences index using fuzzy composite programming, Journal of Hazardous Material. 162 (2009) 29-43
Amyotte, A comprehensive quantitative tool for inherent for safety and cost evaluation, Journal Loss and Prevention for Process Industries. 18 (2005)310-326

Supplementary cement materials have a significant impact on chloride binding in cement-based materials.
Experimental Materials and mix proportions.
In this study, local materials are used.
[4]Cao Qing, Tan Kefeng, Yuan Wei, Research on the Selected Factors Affecting Chloride Binding of Cementitous Materials, Journal of Wuhan University of Technology, 2009.31(6):24-27.
(in Chinese) [5]Luo Rui1, Cai Y uebo, Wang Changyi, Binding Capability of Chloride Ions in Mortar and Paste with Ground Granulated Blast Furnace Slag, Journal of Building Materials,2001.4(2):148-153.

The processing principles and raw materials for pellet fuel and briquette fuel are same, but their size and processing equipments are different.
In addition, the processing pretreatment conditions of biomass raw materials of pellet fuel is usually higher than briquette fuel.
Journal of Agricultural Mechanization Research.
Journal of Plasticity Engineering.
Journal of Agricultural Mechanization Research.

The materials were SiO2, B2O3 and soluble glass as binder.
The sample was the graphite anode used in molten salt electrolysis of calcium; the raw materials were boric acid, SiO2 which can be replaced by common glass and soluble glass as binder.
Table 1 Results at different condition of the ratio of raw materials according to the first method (sintering time was 1h) No.
And because coating materials can permeate to fill graphitic pores, the diffusion of oxidative gas is prevented.
Little: Journal of Materials Science.