作者：Ziarati, K; Soumis, F; Desrosiers, J; Solomon, MM
作者单位：Universite de Montreal; Polytechnique Montreal; Universite de Montreal; Universite de Montreal; HEC Montreal; Northeastern University
摘要：The problem of assigning locomotives to trains consists of selecting the types and number of engines that minimize the fixed and operational locomotive costs resulting from providing sufficient power to pull trains on fixed schedules. The force required to gull a train is often expressed in terms of horsepower and tonnage requirements rather than in terms of number of engines. This complicates the solution process of the integer programming formulation and usually creates a large integrality g...
