Learning and Intelligent Optimization : 9th International Conference, LION 9, Lille, France, January 12-15, 2015. Revised Selected Papers - Dhaenens, Clarisse (Herausgeber); Jourdan, Laetitia (Herausgeber); Marmion, Marie-Eléonore (Herausgeber) (Theoretical Computer Science and General Issues, 2015)