A produce‐to‐stock system with advance demand information and secondary customers

We consider a manufacturer (i.e., a capacitated supplier) that produces to stock and has two classes of customers. The primary customer places orders at regular intervals of time for a random quantity, while the secondary customers request a single item at random times. At a predetermined time the manufacturer receives advance demand information regarding the order size of the primary customer. If the manufacturer is not able to fill the primary customer's demand, there is a penalty. On the other hand, serving the secondary customers results in additional profit; however, the manufacturer can refuse to serve the secondary customers in order to reserve inventory for the primary customer. We characterize the manufacturer's optimal production and stock reservation policies that maximize the manufacturer's discounted profit and the average profit per unit time. We show that these policies are threshold‐type policies, and these thresholds are monotone with respect to the primary customer's order size. Using a numerical study we provide insights into how the value of information is affected by the relative demand size of the primary and secondary customers. © 2007 Wiley Periodicals, Inc. Naval Research Logistics, 2007     

明确定位 履行职责——浅议高校辅导员工作

作为高校大学生思想政治教育队伍的三大主体之一,辅导员是高校稳定和培养德智体美劳全面发展的社会主义事业的合格建设者和可靠接班人的重要力量。角色定位,决定工作职责,作为辅导员只有找准角色定位,明确工作职责,并认真履行工作职责,才能成为一名称职的辅导员。     

Pakistan’s nuclear weapons: how safe is safe enough? Transparency versus opacity

Due to expanding and increasing religious extremism and terrorism coupled with political instability in Pakistan, most western observers believe that Pakistan's nuclear weapons are not secure and could be taken over by terrorists. This would have adverse implications for the region and for global peace, especially for the security of USA and Europe. This article argues that this perception is based on a flawed understanding and knowledge of how Pakistan's command and control setup has evolved and operates. Pakistan's nuclear weapons are as safe as any other state's nuclear weapons. Pakistan has also been active in supporting and participating in global efforts to improve nuclear safety and security. Over the years, Pakistan has been quite open in sharing information regarding how it is improving its command and control system with western governments as well as scholars. This article argues that the steps Pakistan has taken to secure its nuclear weapons are adequate and that Pakistan would continue to further strengthen these measures; however, it is the expanding religious extremism, terrorism and anti-Americanism in the country which make the international perception of Pakistan extremely negative and then seep into the perception of Pakistan's nuclear weapons safety and security.     

深化党的建设制度改革的几点思考

党的十八届三中全会在总结历年来党的建设经验、不断深化对党的建设规律认识和把握的基础上,把制度建设放在了突出地位,明确强调：“紧紧围绕提高科学执政、民主执政、依法执政水平,深化党的建设制度改革。”现阶段,要全面建成小康社会,加快推进社会主义现代化,就必须深化党的建设制度改革,为全面深化改革提供坚强的政治保证。     

刑法罪名“口袋化”倾向之反思

我国刑法中的一些罪名在司法认定过程中,日益具有＂口袋化＂的倾向。这一倾向与罪刑法定原则、尊重保障人权的基本理念相冲突。这一倾向产生的原因主要有：部分刑法条文的规定不够明确;司法工作人员对于犯罪构成要件以及刑法基本理论的理解存在偏差;以社会危害性为中心的传统刑法观的影响;个别司法解释有违刑法的基本规定和基本原理等。应结合这一倾向产生的原因,通过各种途径对其加以遏制。     

人民武装警察危难救助义务初探

危难救助是《中华人民共和国人民武装警察法》规定的、人民武装警察应当履行的法定义务之一。人民武装警察危难救助义务的内涵和危难救助义务的履行要求必须明确,履行危难救助义务与执行任务、履行法定职责相冲突时,不得放弃履行法定职责。     

论实现党委科学决策应重点把握的三个要素

实现党委科学决策,必须在学习理论中“扩容”思维,在学习科技中“升级”本领,在学习党章中“硬化”原则,夯实党委决策的基础;必须运用选点实验的方法为决策“试车探路”,运用咨询专家的方法为决策“出谋划策”,运用信息化手段方法为决策“助推加力”,丰富党委决策的方法;必须建立健全调研论证、民意表达、监督制约、失误追究等制度,规范党委决策的流程。     

舰空导弹武器系统作战效能评估综述

在舰空导弹武器系统作战效能评估研究现状基础上,分析武器系统作战效能评估的关键研究方向,如作战效能评估方法及模型、作战指挥效能评估、武器系统使用可用性评估、人机系统可靠性评估、武器系统生存能力评估、任务完成程度评估、武器系统战场抢修研究等,展望了该研究领域的发展动向。     

地空导弹反导作战拦截次数计算模型及仿真

在分析地空导弹武器系统拦截来袭目标过程的基础上,通过分析地空导弹发射区纵深建立了地空导弹武器系统可拦截次数模型.利用该模型可计算地空导弹武器系统对单个来袭目标在杀伤区内的拦截次数.仿真结果揭示了地空导弹武器系统在不同目标特性(速度、高度、航路捷径)下对目标的可拦截次数的影响.     

玄武岩纤维增强塑料筋耐海水腐蚀性研究

海工工程中由于海水的腐蚀,混凝土中的钢筋会出现锈蚀等问题.玄武岩纤维增强塑料筋作为一种新型建筑材料,用来代替钢筋用在海工工程等腐蚀性较强的混凝土中,以此避免钢筋锈蚀带来的耐久性问题.研究了玄武岩纤维增强塑料筋耐海水腐蚀性,采用常温长期浸泡和高温浸泡加速腐蚀试验方法,得出玄武岩纤维增强塑料筋在常温下耐海水腐蚀性较强,而在...