异构资源类型下多无人机任务分配

针对多无人机在执行侦察、打击任务的过程中携带任务资源的异构性,以及任务对于异构资源的要求,设计了一种改进的基于共识的捆绑算法(consensus-based bundle algorithm, CBBA)。考虑任务价值、任务执行时间窗以及航程代价等条件建立了多无人机对地目标侦察、打击任务分配模型。利用K-medoids聚类分析方法对多无人机进行基于距离和携带资源平衡的聚类,以解决多无人机对于异构资源类型的要求。对打击任务进行子任务生成,并利用改进后的CBBA求解所建立的任务分配模型,通过对比仿真实验验证了算法的可行性和有效性。     

The impact of animal welfare regulations on firms' product offerings: Humane or organic product?

Increased public concerns about animal welfare have spurred new regulations to improve animals' treatment and living conditions. We study how these regulations affect firms' product offerings, prices, and profits. We consider two competing animal agriculture supply chains, each consisting of a supplier and a buyer. New regulations require firms to choose between offering humane or organic products, which are differentiated by animals' living conditions. We find that consumers' growing awareness of animal welfare encourages firms to offer organic products, which require the highest standards for animals' living conditions. We also show that tightening humane product standards and loosening organic product standards encourage firms to offer organic products—but with distinct pricing implications. The former leads to higher retail prices whereas the latter may lower retail prices. Depending on costs and consumers' awareness of animal welfare, a humane product may be priced higher or lower than an organic product. Furthermore, we provide conditions under which a regulator should offer a unit-cost or an investment cost subsidy to improve social welfare. We show that subsidies can encourage firms to change from offering humane to organic products, or vice versa, to enhance total social welfare.     

大功率柔性互联设备的有功互济协调控制方法

针对以常规母联开关互联的交流电网线路变压器容量无法合理利用的问题,提出了依靠由背靠背电压源变流器组成的新型大功率柔性互联装置实现两侧交流电网有功功率互济的协调控制方法。介绍了新型柔性互联装置的拓扑结构与基本的控制原理,为实现两侧线路变压器容量合理的目标制定了一种生成有功功率参考的方法,并基于PSCAD/EMTDC搭建了一套仿真算例,对新型柔性互联装置的基本控制与所提出的有功互济的协调控制方法进行了验证。仿真结果表明,在柔性互联装置采用所提方法时能够实现两侧交流线路的有功功率互济,解决了线路变压器容量无法合理分配的问题。     

Supply chain coordination with product line design and a revenue sharing scheme

Many manufacturers sell their products through retailers and share the revenue with those retailers. Given this phenomenon, we build a stylized model to investigate the role of revenue sharing schemes in supply chain coordination and product variety decisions. In our model, a monopolistic manufacturer serves two segments of consumers, which are distinguished by their willingness to pay for quality. In the scenario with exogenous revenue sharing ratios, when the potential gain from serving the low segment is substantial (e.g., the low‐segment consumers' willingness to pay is high enough or the low segment takes a large enough proportion of the market), the retailer is better off abandoning the revenue sharing scheme. Moreover, when the potential gain from serving the low (high) segment is substantial enough, the manufacturer finds it profitable to offer a single product. Furthermore, when revenue sharing ratios are endogenous, we divide our analysis into two cases, depending on the methods of cooperation. When revenue sharing ratios are negotiated at the very beginning, the decentralized supply chain causes further distortion. This suggests that the central premise of revenue sharing—the coordination of supply chains—may be undermined if supply chain parties meticulously bargain over it.     

基于multi-agent编组的校园虚拟实验网格任务分配策略

在网格计算环境下,许多任务的执行经常需要同时协同分配多个agent以满足性能需求.提出了一种新的基于multi-agent编组机制的agent协同分配方法.首先,对传统编组算法和multi-agent编组算法进行了分析比较.然后,设计了校园虚拟实验网格调度系统及其任务分配算法,实验结果表明:当CDR=0.2时,算法与传统算法带来最好的目标价值,在某些条件下,传统算法略微胜过该算法,当CDR增大时,该算法比传统算法执行得更好.     

一种面向应用的NOC缓冲区分配算法

片上互连网络是片上通信问题的有效解决方案,但其存在严重的资源限制.输入缓冲区占据片上网络总面积的显著部分,同时其容量大小对不同应用映射后获得的性能有重要影响.给出一种面向应用数据负载的NOC缓冲区分配算法,针对不同的应用映射,该算法可以根据数据流量分布特征实现各个路由器输入通道上缓冲区资源的定制分配.实验结果表明,使用该算法后,系统缓冲区资源得到了更有效的利用.与均匀分配缓冲区的NOC系统相比,采用该算法实现的缓冲区分配方案使系统在保持性能变化不大的情况下,能够节省约50%的缓冲区总容量.     

基于改进遗传算法的油料调拨优化

为实现油料快速调拨运输,利用改进的遗传算法求解油料调拨优化问题,采用了一种受贪婪算法启发的新的交叉算子和变异算子,对比模拟退火算法等其他算法而言,具有较好的鲁棒性,能很好地解决油料调拨运输过程中多任务多地点的油料调拨运输问题。     

Designing and pricing menus of extended warranty contracts

Extended warranties provide “piece of mind” to a consumer in that product failures which occur after the base warranty expires are rectified at little or no cost. They also provide an additional source of revenue for manufacturers or third‐party providers, such as retailers or insurance providers, and help cultivate consumer loyalty. In this article, we analyze a number of extended warranty contracts which differ in design, including restrictions on deferrals and renewals. With the use of dynamic programming, we compute the optimal strategy for a consumer with perfect information and determine the optimal pricing policy for the provider given the consumer's risk characterization. We also provide insight into when different contracts should be issued. Finally, we illustrate how profits can be dramatically increased by offering menus of warranty contracts, as opposed to stand alone contracts, with the use of integer programming. Surprisingly, risk‐taking consumers provide the greatest benefit to offering menus. These insights can help a company develop a comprehensive warranty planning strategy for given products or product lines. © 2009 Wiley Periodicals, Inc. Naval Research Logistics 2009     

部队国有资产管理问题与对策研究

近年来,随着国家和地方政府对部队经费投入的不断增长,部队国有资产在数量、质量以及结构上都有了很大的改善。如何建立健全部队国有资产的管理制度,保证部队国有资产的安全完整和有效使用,防止国有资产流失,是当前部队资产管理和使用人员必须思考的现实问题。     

防空导弹总体设计方法的新发展——弹族化设计

研究了防空导弹一种新的总体设计思想———弹族化设计 ,论述了防空导弹弹族的设计与研制采用预先计划的产品改进P3 I(Pre PlannedProductImprovement)系统方法的必要性与有效性 ,通过对一个覆盖全空域、包含有 3种导弹的防空导弹弹族进行一体化优化设计 ,其结果证明了弹族化设计方法的可行性和优越性