Takashi Onoda Norihiko Ito Hironobu Yamasaki Unusual Condition Mining for Risk Management of Hydroelectric Power Plants. 694-698 2006 conf/icdm/2006w ICDM Workshops http://doi.ieeecomputersociety.org/10.1109/ICDMW.2006.167 db/conf/icdm/icdmw2006.html#OnodaIY06