Studies in Computational Intelligence, Volume 8 Editor-in-chief Prof. Janusz Kacprzyk Systems Research Institute Polish Academy of Sciences ul. Newelska 6 01-447 Warsaw Poland E-mail: kacprzyk@ Further volumes of this series can be found on our homepage: Vol. 1. Tetsuya Hoya Artificial Mind System – Kernel Memory Approach, 2005 ISBN 3-540-26072-2 Vol. 2. Saman K. Halgamuge, Lipo Wang (Eds.) Computational Intelligence for Modelling and Prediction, 2005 ISBN 3-540-26071-4 ˙ Vol. 3. Bozena Kostek Perception-Based Data Processing in Acoustics, 2005 ISBN 3-540-25729-2 Vol. 4. Saman Halgamuge, Lipo Wang (Eds.) Classification and Clustering for Knowledge Discovery, 2005 ISBN 3-540-26073-0 Vol. 5. Da Ruan, Guoqing.