4Miura K. Mild conversion of coal for producing valuable chemicals [J]. Fuel processing technology, 2000, 62:119-135.
5Osuma Okuma. Liquefaction Process with Bottom Recycling for Complete Conversion of Brown Coal[J]. Fuel, 2000, 79 (3): 355- 364.
6Cugini A V, Rothenberger K S, Krastman D, et al. The Use of Coal Liquefaction Catalysts for Coal/oil Coprocessing and Heavy Oil Upgrading[J]. Catalysis Today, 1998, 43: 291-303.
7Comolli A G, Lee T K, Popper G A, et al. The Shenhua Coal Direct Liquefaction Plant[J]. Fuel Proc Tech, 1999, 59: 207-215.
8Mckiney D E, Clifford D J, Lei H, et al. High Performance Liquid Chromatography of Coal Liquefaction Process Streams Us-ing Norreal-phase Seperationi with Diode Array Detection[J]. Energy and Fuels, 1995(9): 90-96.
9Katoh T, Ouchi K. Analysis of Coal-derived Liquid Obtained by Mild Hydrogenation 2: Neutral Oil Distilling at 343-464℃[J]. Fuel,1987, 66: 59-69.
10Miura K, Mae K, Li Wen, et al. Estimation of Hydrogen Bond Distribution in Coal Through the Analysis of OH Stretching Bands in Diffuse Reflectance Infrared Spectrum Measured by In-situ Technique[J]. Energy &Fuels, 2001, 15: 599-610.
6Shahbaz M, Tiwari A K, Jam F A, et al. Are fluctuations in coalconsumption per capita temporary? Evidence from developed and developing economies[J]. Renewable and Sustainable Energy Rev/ews,2014,33 (2) :96-101.
7Frondel M, Kambeck R, Schmidt C M. Hard coal subsidies: A never-ending story?[J]. Energy Policy,2007,35(7) :3807-3814.
8Zaffilla J E. The mining industry under the thumb of politicians : The environmental consequences of the Spanish Coal Decree[J]. Journal of Cleaner Production, 2014,84: 715-722.
9Vernon R. International investment and international trade in the product cycle[J]. International Economics Policies & Their Theoretical Foundations, 1966,8(4) :415-435.
10Uttcrback J M. Mastering the Dynamics of Innovation[M]. Cam- bridge:Harvard Business School Press, 1994.
