基于扩展Petri网的动态服务聚合流程描述模型及其BPEL4WS表示方法

针对现有服务聚合流程建模方法的不足,基于扩展Petri网提出了一种新的服务聚合流程/资源描述模型WSCP/R-net,有效解决了动态服务聚合流程模型中不确定路径选择和服务的动态变化性问题。给出了WSCP/R-net模型向BPEL4WS的转换算法,并以城市应急处理为例说明了转换算法的有效性。     

Technical note: Finite-time regret analysis of Kiefer-Wolfowitz stochastic approximation algorithm and nonparametric multi-product dynamic pricing with unknown demand

We consider the problem of nonparametric multi-product dynamic pricing with unknown demand and show that the problem may be formulated as an online model-free stochastic program, which can be solved by the classical Kiefer-Wolfowitz stochastic approximation (KWSA) algorithm. We prove that the expected cumulative regret of the KWSA algorithm is bounded above by where κ₁, κ₂ are positive constants and T is the number of periods for any T = 1, 2, … . Therefore, the regret of the KWSA algorithm grows in the order of , which achieves the lower bounds known for parametric dynamic pricing problems and shows that the nonparametric problems are not necessarily more difficult to solve than the parametric ones. Numerical experiments further demonstrate the effectiveness and efficiency of our proposed KW pricing policy by comparing with some pricing policies in the literature.     

Supply chain coordination with shelf‐space and retail price dependent demand and heterogeneous retailers

We consider supply chain coordination in which a manufacturer supplies some product to multiple heterogeneous retailers and wishes to coordinate the supply chain via wholesale price and holding cost subsidy. The retail price is either exogenous or endogenous. The market demand is described by the market share attraction model based on all retailers'shelf‐spaces and retail prices. We obtain optimal solutions for the centralized supply chain, where the optimal retail pricing is a modified version of the well‐known cost plus pricing strategy. We further get feasible contracts for the manufacturer to coordinate the hybrid and decentralized supply chains. The manufacturer can allocate the total profit free to himself and the retail market via the wholesale price when the retail price is exogenous, but otherwise he cannot. Finally, we point out that different characteristics of the retail market are due to different powers of the manufacturer, and the more power the manufacturer has, the simpler the contract to coordinate the chain will be. © 2010 Wiley Periodicals, Inc. Naval Research Logistics, 2010     

一次性化学电池动态输出特性光电耦合测量法

提出了装备用一次性化学电池动态输出特性的光电耦合测量法。该方法采用独立电源供电,工作安全可靠,系统标定和数据采集、处理及结果输出等均由计算机控制完成,具有良好的操作环境,并且可在电动高旋机上使用,也可以用于对各种电压信号远距离遥测。     

两栖装甲车辆水上操纵性的提高与评价

对采用履带划水推进方式的两栖装甲车辆的水上操纵性进行了分析,没出了极高其水上操纵性的基本途径,并对操纵性的评价指标进行了探讨,对提高操纵性,加强试验研究提出了建议.     

强化部队战斗精神的辩证思考

本文从军队共性与我军个性,历史传统性与时代性,内在精神性与外显物质性,官兵个体性与部队群体性等辩证关系出发,探索强化部队战斗精神的有效途径和科学方法。     

战略探源

战略问题日趋重要。为了进一步探讨战略的本质,本文试图从语源角度分析战略的内涵。西方语源中战略体现了其整体系统、生命种子等特征,其构形也蕴含着强壮、张力、建构、秩序和践行、实现等含义,而这涉及了战略的哲学。在汉字系统中,与战略相关的“略”、“寿”(畴和筹)、“周”(稠)均与土地耕种及其谋划相联系,反映了农耕社会的整体观和未雨绸缪意识。中西语源中的战略思想丰富并深化了现有的战略概念。     

空间信息栅格体系与服务聚合技术

空间信息应用中存在的数据海量、分布异构、处理复杂、计算密集等问题制约了空间数据和信息的广泛共享和应用。空间信息栅格(SIG)以Grid和WebServices技术为核心,共享并汇集地理上分布的海量空间信息资源,实现动态整合与集成。在构建开放性SIG七层应用体系的基础上,重点研究SIG服务聚合技术,基于Petri网和图论提出了一种新的服务聚合流程模型(服务/资源网),同时构建了可扩展的服务动态选择模型(SISM),实现服务聚合过程中的动态服务选择。结合国家地质调查业务应用,通过地下水资源评价应用实例对SIG的实用性和有效性进行了验证。     

坚持把加强和改进思想作风建设作为军队建设的重大紧迫任务来抓

加强和改进新形势下思想作风建设,是推进部队党的建设一项重大而紧迫的任务.要进一步提高思想认识,切实认清加强和改进新形势下思想作风建设的重大意义及现实紧迫性;真正吃透"两头",切实找准加强和改进思想作风建设的着力点;抓住党委班子这个关键,切实用以上率下的行动引领部队思想作风建设.     

充分发挥思想政治教育在培育社会主义荣辱观中的作用

胡锦涛总书记提出以“八荣八耻”为具体内容的社会主义荣辱观,是对马克思主义道德观的精辟概括,是对新世纪新阶段社会主义道德的深刻阐述,是推进社会主义精神文明建设的强大思想动力和重要指导方针。军队思想政治教育工作要充分发挥其对树立社会主义荣辱观的培育功能,坚持学与思、知与行、从善与耻恶的统一,进一步提高官兵的思想道德素质。