The 19th Annual Conference of the Japanese Society for Artificial Intelligence, 2005 1F4-03 One Class SVM (2) Unusual condition detection of bearing vibration in hydropower plants (2) ∗1 Takashi Onoda ∗1 Norihiko Ito ∗2 Kenji Shimizu ∗2 Nobukatsu Nobe ∗2 Hideki Murakawa ∗1 ( ) Central Research Institute of Electric Power Industry ∗2 Kyushu Electric Power Co.,Inc. Kyushu Electric Power Co.,Inc. col