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We state a balancing problem for mixed model assembly lines with a paced moving conveyor as: Given the daily assembling sequence of the models, the tasks of each model, the precedence relations among the tasks, and the operations parameters of the assembly line, assign the tasks of the models to the workstations so as to minimize the total overload time. Several characteristics of the problem are investigated. A line‐balancing heuristic is proposed based on a lower bound of the total overload time. A practical procedure is provided for estimating the deviation of any given line‐balance solution from the theoretical optimum. Numerical examples are given to illustrate the methodology. © 2004 Wiley Periodicals, Inc. Naval Research Logistics, 2004. 相似文献
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1952年1 0月14日~11月25日,中国人民志愿军第1 5军和第12军参战部队在上甘岭战役中取得了胜利,打出了“上甘岭精神”,为抗美援朝战争的最后胜利奠定了基础.本文作者作为战争亲历者,撰写此文回顾志愿军第12军参加上甘岭战役的战斗经历,并以此缅怀在战役中牺牲的战友,纪念上甘岭战役胜利60周年. 相似文献
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Considering a supply chain with a supplier subject to yield uncertainty selling to a retailer facing stochastic demand, we find that commonly studied classical coordination contracts fail to coordinate both the supplier's production and the retailer's procurement decisions and achieve efficient performance. First, we study the vendor managed inventory (VMI) partnership. We find that a consignment VMI partnership coupled with a production cost subsidy achieves perfect coordination and a win‐win outcome; it is simple to implement and arbitrarily allocates total channel profit. The production cost subsidy optimally chosen through Nash bargaining analysis depends on the bargaining power of the supplier and the retailer. Further, motivated by the practice that sometimes the retailer and the supplier can arrange a “late order,” we also analyze the behavior of an advance‐purchase discount (APD) contract. We find that an APD with a revenue sharing contract can efficiently coordinate the supply chain as well as achieve flexible profit allocation. Finally, we explore which coordination contract works better for the supplier vs. the retailer. It is interesting to observe that Nash bargaining solutions for the two coordination contracts are equivalent. We further provide recommendations on the applications of these contracts. © 2016 Wiley Periodicals, Inc. Naval Research Logistics 63: 305–319, 2016 相似文献
35.
1943年秋日军发动鲁西细菌战述评 总被引:2,自引:0,他引:2
1943年8月下旬至10月下旬,在整个世界反法西斯战争节节胜利的大背景下,日本华北方面军第12军在以馆陶、临清为中心的鲁西、冀南地区实施了大规模的霍乱细菌战,以较小的代价给中国抗日军民造成重大杀伤。此次细菌战同以往日军进行的历次细菌战相比,有其发生的特殊原因,具备许多鲜明的特点,对日军以后的细菌战决策产生了重大影响。 相似文献
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赵北臣 《军队政工理论研究》2008,9(1):6-8
改革开放30年的光辉历史,写下一个结论、证明一个事实、揭示一个真理、凝聚一个共识,昭示我们必须坚定不移地高举中国特色社会主义伟大旗帜;坚定不移地坚持和维护中国共产党的领导;牢固树立和深入贯彻落实科学发展观;有效履行我军历史使命,努力为中国特色社会主义建设做贡献。 相似文献
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With the help of the Internet and express delivery at relatively low costs, trading markets have become increasingly popular as a venue to sell excess inventory and a source to obtain products at lower prices. In this article, we study the operational decisions in the presence of a trading market in a periodic‐review, finite‐horizon setting. Prices in the trading market change periodically and are determined endogenously by the demand and supply in the market. We characterize the retailers'optimal ordering and trading policies when the original manufacturer and the trading market co‐exist and retailers face fees to participate in the trading market. Comparing with the case with no trading fees, we obtain insights into the impact of trading fees and the fee structure on the retailers and the manufacturer. Further, we find that by continually staying in the market, the manufacturer may use her pricing strategies to counter‐balance the negative impact of the trading market on her profit. Finally, we extend the model to the case when retailers dynamically update their demand distribution based on demand observations in previous periods. A numerical study provides additional insights into the impact of demand updating in a trading market with the manufacturer's competition. © 2009 Wiley Periodicals, Inc. Naval Research Logistics, 2010 相似文献
38.
高校现代教育技术应用现状及发展趋势 总被引:5,自引:0,他引:5
通过对高校现代教育技术应用现状的分析,阐述了高校现代教育技术应用的发展趋势。 相似文献
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