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As we can be seen from the table, among the green mining of the eight coal enterprises, there are five whole-effective enterprises(technical efficiency, pure technology efficiency, scale efficiency are 1),the other three are whole-invalid enterprises(pure technology efficiency, scale efficiency<1,to lead to the technical efficiency<1).Among them, two enterprises are the increasing returns to scale, that means the enterprise should be continue to advance the green mining within certain limit.
A Study on the Management Efficiency Evaluation of Urban Tourism Based on DEA Model——A Case of Fifteen Vice-Province Cities in China[J].Tourism Forum,2012(2):208-215
A DEA-Based Performance Evaluation-Listed Engineering Machinery Corporations As an example[J].Journal of Shanghai Finance University,2007(2):64-65.

Effects of Alloy Elements (Mo, Al, and B) Addition on the Damping Property of Ti-25Nb-1.5O Alloys Qin Fengming a, Yu Limingb* School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, China aqin.fengming1014@163.com Corresponding author ：b﹡liming-y-h@263.net Keywords: Ti-Nb-O alloy; Alloy elements addition; Damping property; Mechanical property Abstract.
Structure and phase composition of the as-prepared samples were analyzed by means of optical microscope (OLYMPUS PMG3) and X-ray diffraction (XRD, Bruker D8 ADVANCE), measured at room temperature.
Materials Science Forum. 614(2009), p. 175 [6]S.H.YI.

Zhang 1,c 1 Department of Mechanical Engineering, Shandong University, Jinan, 250061, China a liuriliang@sdu.edu.cn, bzhizhi@mail.sdu.edu.cn, c crzhang@sdu.edu.cn Keywords: Intelligent manufacturing, CNC, STEP-NC Abstract.
Due to the successive advances over the last decades, most of today's CNC machines are capable of operations such as automatic tool changing, multi-axis machining, and part program editing and storage etc, and able to produce more and more complex components.
Forum, vol.532-533 (2006), pp.1108

Substrate Bias Amplification of a SiC Junction Field Effect Transistor with a Catalytic Gate Electrode S.Nakagomi1, M.Takahashi1 , Y.Kokubun 1, L.Unéus2 , S.Savage 3, H.Wingbrant 2, M.Andersson 2, I.Lundström 2, M.Löfdahl4 and A.Lloyd Spetz2 1 School of Science and Engineering, Ishinomaki Senshu University, Ishinomaki, 986-8580, Japan 2 S-SENCE and Div. of Applied Physics, Linköping University, SE-581 83 Linköping, Sweden 3 ACREO AB, Electrum 236, SE-164 40 Kista, Sweden 4 AppliedSensor AB, Teknikringen 6, SE-583 30 Linköping, Sweden Keywords: gas sensor, catalytic gate, substrate bias, buried channel, JFET, SIT, high temperature Abstract.
Savage: Recent Major Advances in SiC, Eds.
Forum 338-342, (2000), p.1439 [3] J.

Preparation of Green Tapes for LTCC/Cu Multilayer Substrates Yan Wang, Yang Liu, Jusheng Ma 1Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China wangyan01@mails.tsinghua.edu.cn Keywords: LTCC/Cu, Tape casting, Poly methyl methacrylate, Substrates Abstract.
Forum Vols. 475-479 (2004), p.1763 [2] Yonggang Wang, Guangneng Zhang and Jusheng Ma: Mater.
Yuhaku, in: Advances in ceramics, edited by M.

Especially on the Kyoto 3rd World Water Forum, the WPI was attracted vast attention [3].
The measures that increasing water conservancy project construction, advancing water resource supplying, strengthening environment and sewage treatment, and ecological restoration for the North Mountain and South Mountain can be took to establish water security system.
Safety and Environmental Engineering, 2004, 11(1): 42-45

., n) is determined in advance, and its value is generally a subjective value, which has a certain arbitrariness[7,8].
Ma: submitted to Journal of Statistics and Information Forum (2005)
Chen: submitted to Journal of Application of System Engineering Theory and Methods (2004)

Free Vibration Analysis of Functionally Graded FG Nano-Plates with Porosities MERDACI Slimane1,a*, HADJ MOSTEFA Adda2,b, BOUTALEB Sabrina3, HELLAL Hadjira3 1Structures and Advanced Materials in Civil Engineering and Public Works Laboratory, University of Sidi Bel Abbes, Faculty of Technology, Civil Engineering and Public Works Department, Algeria. 2Industrial Engineering and Sustainable Development Laboratory, University Center of Rélizane, Institute of Science & Technology, Civil Engineering Department, Algeria. 3Laboratory of Materials and Hydrology, University of Sidi Bel Abbes, Faculty of Technology, Department of Civil Engineering and Public Works, BP 89 Cité Ben M’hidi, 22000 Sidi Bel Abbes, Algeria.
[9] Merdaci Slimane, “Analysis of Bending of Ceramic-Metal Functionally Graded Plates with Porosities Using of High Order Shear Theory”; Advanced Engineering Forum, 30, 54-70, (2018).
Mech. 53 ,1143–1165. (2015) [21] Merdaci .S, Belmahi .S, Belghoul .H, Hadj Mostefa .A ,“Free Vibration Analysis of Functionally Graded Plates FG with Porosities”, International Journal of Engineering Research & Technology , 8(3), 143-147, (2019).
[23] Daneshmehr .A, Rajabpoor .A, Hadi .A, Size dependent free vibration analysis of nanoplates made of functionally graded materials based on nonlocal elasticity theory with high order theories, International Journal of Engineering Science, Vol. 95, pp. 23-35, (2015)
[47] Gafour.Y , hmed Hamidi .A, Benahmed .A, Zidour .M and Bensattalah .T, “Porosity-dependent free vibration analysis of FG nanobeam using non-local shear deformation and energy principle”, Advances in Nano Research, 8(1), 37-47,(2020).

Temperature monitoring during Laser Beam Forming of steel sheets AKINLABI Stephen1,a and AKINLABI Esther2,b 1School of Mechanical, Industrial and Aeronautical Engineering, University of the Witwatersrand, Private Bag X3, BRAAMFONTEIN 2010, South Africa. 2Department of Mechanical Engineering Science, University of Johannesburg, Auckland Park Kingsway Campus, Johannesburg, South Africa, 2006.
J. of Advanced material Research, Vols. 299-300, (2011) pp. 1151-1156
Department of Mechanical Engineering, Faculty of Engineering, Nelson Mandela Metropolitan University, Port Elizabeth, South Africa, 2005
(2011), organized by the World Academy of Science, Engineering and Technology on Materials and Manufacturing (WASET)
Forum, Vol. 652, (2010) pp. 123-128.

The conceptual model of method proposed aims to work alongside early stages, working mainly during the conceptual design, phase where the simultaneity of engineering and design can produce more effective results for development of sustainable products.
A modular approach to sustainability assessment and decision support in chemical process design, Industrial & Engineering Chemistry Research, 49 (2010) 7870-7881
Lindahl, Engineering designers' experience of design for environment methods and tools – Requirement definitions from an interview study, Journal of Cleaner Production 14.5 (2006) 487-496
An assessment method and design support system for designing sustainable machine tools, Journal of Engineering Design, 22.3 (2011) 883-895
Zarandi, et al., A material selection methodology and expert system for sustainable product design, International Journal of Advanced Manufacturing Technology, 57 (2011) 885-903