一、时间
2019年11月5日星期二，15：40-17：00
二、地点
机械楼D530
三、主讲人
浙江大学 杨翼教授 国家优青/青年长江
四、报告摘要
We consider a periodic-review perishable inventory system with multiple demand classes, each characterized by a di?erent lost-sale cost and the least freshness requirement. Demands of di?erent classes in the same period could be correlated, while demands across periods are independent but not necessarily identical. In each period, the firm jointly makes the decisions regarding inventory issuing, rationing, production/ordering, and disposal. The objective is to minimize the total discounted expected cost over the entire planning horizon including linear ordering cost, inventory holding/lost-sales cost, expiration cost and disposal cost. By establishing new properties of multimodularity, we explore some monotonicity and bounded sensitivity properties of the optimal policies. Based on the optimality analysis, we then propose a novel approximation approach, called adaptive approximation approach, which can be recursively calculated through a single-dimension dynamic program. Numerical studies demonstrate that our proposed approximation approach is nearly optimal with the average optimality gap 0.30% and significantly outperforms the existing heuristics studied in the literature. In practice, we notice that neither retailers nor e-tailers incorporate customers’ freshness requirements into their practical operations. However, our numerical studies show that ignoring customers’ freshness requirements can lead to a significant increase in total costs, especially for online retailing.
五、主讲人简介
杨翼，浙江大学管理学院教授，博士生导师，数据驱动决策研究所所长，教育部青年长江学者，国家自然科学基金优秀青年科学基金获得者，运筹学会青年科技奖。2011年毕业于香港中文大学系统工程与工程管理学系。主要研究方向包括库存管理、收益管理以及运营管理。在高水平国际期刊上发表论文十余篇，特别是在《Operations Research》,《Manufacturing & Service Operations Management》,《Production and Operations Management》等UT/Dallas24种经济管理类国际公认顶级期刊上发表学术论文多篇。承担多项国家及省部级课题，现担任《Naval Research Logistics》和JORSC (Journal of the Operations Research Society of China)的Associate Editor、运筹学会随机服务与运作管理分会理事、系统工程学会物流系统工程专业委员会理事、运筹学会智能工业数据解析与优化分会理事等工作。
