electricity market is a new issue or belong to "power system operation & planning" or others? Are there anyone know that? % E2 j- o: w4 |2 @$ I7 E * [, `/ ?3 m8 Y" Y- v) X1 w! H) OThen which area does OPF belong to? ) {$ S6 f2 g4 }2 u7 Z1 r ! B1 b$ Q: u9 @Sorry, I cannot type Chinese in this computer.