International Symposium"Computerized Operation of power Systems" (Sao Carlos)International Symposium"Computerized Operation of power Systems" International Symposium on Mathematical Theroy of Networks and Systems Computerized operation of power systems INternational Symposium on Computer Message Systems International Symposium on Wind Energy Systems International Symposium on Modelling and Pergormance Evaluation of Computer Systems International Symposium on Circuits and Systems International Symposium on Harmonization of Collaborative International Symposium on Mathematical Theroy of Networks and Systems. 4