1. College
of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
2. Key
Laboratory of Renewable Energy and Gas Hydrate, Guangzhou Institute
of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, P. R. China
3. Guangzhou
Center for Gas Hydrate Research, Chinese Academy of Sciences, Guangzhou 510640, P. R. China