Mathematical approach for fleet planning under complicated circumstances

In order to facilitate the scientific management of large-sized shipping companies, fleet planning under complicated circumstances has been studied. Based on multiple influencing factors such as the techno-economic status of ships, the investment capacity of company, the possible purchase of new ships, the buying/selling of second-hand vessels and the chartering/renting of ships, a mixed-integer programming model for fleet planning has been established. A large-sized shipping company is utilized to make an empirical study, and Benders decom- position algorithm is employed to test the applicability of the proposed model. The result shows that the model is capable for multi-route, multi-ship and large-scaled fleet planning and thus helpful to support the decision making of large-sized shipping companies.     

在地铁项目建设中如何应用物资精细化管理模式

<正>物资管理是工程项目管理中尤为重要的一项工作内容。分析物资精细化管理在地铁项目建设中的重要性和应用,覆盖物资采购、验收、检验、仓储及发放领用等关键环节,以期在保证施工质量的前提下提高经济效益,保证施工顺利进行,达到提质增效的发展效果。