报告题目：Real-time procurement problem for deteriorating items with limited price information

报告时间：2019年5月14日 上午 9：00

报告地点：旭日楼306教室

报告人： 代文强教授

报告人简介：

代文强，电子科技大学经济与威廉希尔官网教授，已主持2项国家自科基金项目、1项教育部高等学校博士学科点专项科研基金，以及主持或参与多项其他纵向课题。现已在EJOR、IJPR、JOCO、APJOR、TCS、IPL等主流SCI检索期刊，以及管理科学学报、系统工程理论与实践等国内主流期刊上发表论文20多篇。

报告内容简介：

Traditional procurement model for deteriorating items assume the procurer have full information about the procurement price. In this talk, we will discuss two procurement models in which a procurer faces price uncertainty, under constant deterioration rate assumption or random deterioration rate assumption. For each models, we propose a simple and effective real-time procurement policy where the decisions are made only based on the current arriving price and inventory level, with entirely arbitrary non-stationary and even adversarial price sequence arrivals. The only information we need is the lower and upper bounds for price. Thus, our policy delivers robust performance to changing price over time. A theoretical closed-form relative performance criterion of the competitive ratio (CR) is also proven to give the performance guarantee. Our numerical experiments demonstrate even better empirical performance than the corresponding proven worst-case bounds.