As the knowledge-based economy society comes, knowledge workers, which has replaced capital, facilities, raw m...
WANG Yifan 1 , CHEN Di 1,2 , LIU Shixin 1 ,ZENG Qingfu 3 1. College of Information Science & Engineering, Northeastern University, Shenyang 110819, China2. Department of Information Technology and Business Administration, Dalian Neusoft Institute of Information, Dalian 116023, China3. Shandong Iron and Steel Group Logistics Center, Jinan 250132, China
The steelmaking process scheduling problem by considering variable electricity price (SMSPVEP) was investigated. A decomposition approach was proposed for the SMSPVEP. At the first stage, mathematical programming was utilized to minimize the maximum completion time for each cast without considering variable electricity price. At the second stage, based on obtained relative schedules of all casts, a mathematical model was formulated with an objective of minimizing the energy cost for all casts scheduling problem. The two-stage models were tested on randomly generated instances based on the practical process in a Chinese steelmaking plant. Computational results demonstrate the effectiveness of the proposed approach.
针对虚拟企业中盟主与盟员企业之间存在信息不对称的情况,研究了满足项目费用投资和子项目时序约束条件下的项目完工风险问题.考虑到各子项目的工期受盟主分配费用的影响,根据虚拟企业分布式决策的特点,提出了一种新的基于协商的费用—工期完工风险管理框架,并设计了三种让步策略,从而满足按期完工概率的要求,达到控制项目风险的目的.该协商框架分为2层,上层盟主和下层盟员企业.盟主首先给盟员分配资金,盟员根据所分配的资金确定子项目的三点完工时间,盟主收到盟员的响应后,基于计划评审法(program evaluation and review technique,PERT)对整个项目进行评价.最后通过算例分析了不同让步策略下的协商情况,结果表明该协商框架能有效管理完工风险.
In steelmaking process,the process times of machines,such as LD Converter and Refinery etc.are often different...
Xiaochuan Luo,Chongzheng NA, are with Key Laboratory of Integrated Automation of Process Industry,Ministry of Education,Northeastern University,110004 Shenyang,China Rujiu Liu
