1"Shale gas in the United States", http://en, wikipedia, org/ wiki/Shale_gas_in the UnitedStates. (上网时间:2010年11月20日).
2U.S. Energy Information Administration, " World Shale Gas Resources: An Initial Assessment of 14 Regions Outside the United States", April 2011, http://www, eia. doe. gov/analysis/studies/world-shalegas/pdf/fullreport.pdf:(上网时间:2011年11月20日).
3U.S. Energy Information Administration, Annual Energy Out- look 2011, http://www, eia. gov/forecasts/aeo/pdf/0383 (2011 ). pdf.(上网时间:2011年10月28).
6" U. S. Energy Information Administration, " World Shale Gas Resources: An Initial Assessment of 14 Regions Outside the United States", April 2011, http ://www. eia. doe. gov/analysis/studies/world- shalegas/pdf/fullreport, pdf.上网时间:2011年11月20日).
7"Shale Gas and U.S. National Security", http ://bakerinstitute. org/publications/EF-pub- DOEShaleGas- 07192011. pdf. (上网时间:2011年11月10日).
8U.S. Energy Information Administration, Annual Energy Outlook 2011, http ://www. eia. gov/forecasts/aeo/pdf/0383 ( 2011 ). pdf.(上网时间:2011年10月28).
8Technically Recoverable Shale Oil and Shale Gas Resources: An Assessment of 137 Shale Formations in 41 Countries Outside the United States[EB/OL].http://www.eia.gov/analysis/ studies/worldshalegas/.
9CHARNES A,COOPER W W,RHODES E.Measuring the Ef- ficiency of Decision Making Units [J].European Journal of Operational Research, 1978,2(6) : 429-444.
10BANKER R D,CHARNES A,COOPER W W.Some Models for Estimating Technical and Scale Inefficiences in Data Envelop- ment Analysis[J].Management Science, 1984,30(9) : 1078-1092.