1. Energy-Saving Building Materials Collaborative Innovation Center of Henan Province , Xinyang Normal University , Xinyang 464000 , P. R. China
2. Institute of Applied Technology, Hefei Institutes of Physical Science , Chinese Academy of Sciences , Hefei 230031 , P. R. China
3. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources , North China Electric Power University , Beijing 102206 , P. R. China