1. Research Assistant, MOE Key Laboratory of Regional Energy Systems Optimization, S-C Energy and Environmental Research Academy, North China Electric Power Univ., Beijing 102206, China.
2. Professor, MOE Key Laboratory of Regional Energy Systems Optimization, Resources and Environmental Research Academy, North China Electric Power Univ., Beijing 102206, China (corresponding author).
3. Professor, MOE Key Laboratory of Regional Energy Systems Optimization, Resources and Environmental Research Academy, North China Electric Power Univ., Beijing 102206, China.