美军军官晋升的若干特点

顺应新军事变革的发展趋势,美军在实践中不断改革和创新军官的晋升工作,采取有效的形式,建立了稳定的制度,形成了系统的观点,选拔任用了一大批高素质复合型的优秀军官。美军军官晋升中反映的一些基本特点,非常值得我们去深入地研究和把握。一、法规健全美军认为,法制化是从总体上防止军官晋升随意性的重要保证,必须不断推进军官晋升的法制化进程。国会、国防部和各军种都不遗余力,制定了种类繁多、覆盖广泛、层次齐全的军官人事管理法律法规和规章制度,为军官晋升提供了客观的依据、统一的标准和科学的指导。在基本法层面上,有国会通过的《…     

Dynamic pricing in a trade-in program with replacement and new customers

Trade-in programs have been widely adopted to enhance repeat purchase from replacement customers. Considering that a market consists of replacement and new segments, we study the joint and dynamic decisions on the selling price of new product (hereafter, “selling price”) and the trade-in price involved in the program. By adopting a vertical product differentiation choice model, we investigate two scenarios in this paper. In the base model, the manufacturer has sufficiently large production capacity to fulfill the customer demand. We characterize the structural properties of the joint pricing decisions and compare them with the optimal pricing policy under regular selling. We further propose a semi-dynamic trade-in program, under which the new product is sold at a fixed price and the trade-in price can be adjusted dynamically. Numerical experiments are conducted to evaluate the performance of the dynamic and semi-dynamic trade-in programs. In an extended model, we consider the scenario in which the manufacturer stocks a batch of new products in the beginning of the selling horizon and the inventory cannot be replenished. Following a revenue management framework, we characterize the structural properties with respect to time period and inventory level of new products.     

Trade credit contract in the presence of retailer investment opportunity

This paper presents a model for designing a trade credit contract between a supplier and a retailer that would coordinate a supply chain in the presence of investment opportunity for the retailer. Specifically, we study a newsvendor model where the supplier offers a trade credit contract to the retailer who, by delaying the payment, can invest the accounts payable amount and earn returns. We find that when the channel partners have symmetric information about the retailer's investment return, a conditionally concessional trade credit (CTC) contract, which includes a wholesale price, an interest‐free period, and a minimum order requirement, can achieve channel coordination. We then extend the model to the information asymmetry setting in which the retailer's investment return is unobservable by the supplier. We show that, although the CTC contract cannot achieve the coordination in this setting, it can effectively improve channel efficiency as well as profitability for individual partners.     

在英美文学教学中培养大学生批判性思维能力的 创新研究与实践

批判性思维能力的培养对大学生的心理健康、自主学习能力、创新能力以及个性发展等方面都有重要的作用.批判性思维是大学生综合素质的体现.大学英语提高课程"英文小说与电影"以英美文学中经典小说为教学内容,旨在通过英美文学的教学培养学生的批判性思维能力,本课程改变传统教学中教师"一言堂"的教学模式,采用混合式教学模式和问题导向式学习方法,营造批判性思维学习氛围,通过让学生们解读、分析和言说文学经典作品,提高学生的批判性思维能力.     

Algorithm to solve a chance‐constrained network capacity design problem with stochastic demands and finite support

We consider the problem of determining the capacity to assign to each arc in a given network, subject to uncertainty in the supply and/or demand of each node. This design problem underlies many real‐world applications, such as the design of power transmission and telecommunications networks. We first consider the case where a set of supply/demand scenarios are provided, and we must determine the minimum‐cost set of arc capacities such that a feasible flow exists for each scenario. We briefly review existing theoretical approaches to solving this problem and explore implementation strategies to reduce run times. With this as a foundation, our primary focus is on a chance‐constrained version of the problem in which α% of the scenarios must be feasible under the chosen capacity, where α is a user‐defined parameter and the specific scenarios to be satisfied are not predetermined. We describe an algorithm which utilizes a separation routine for identifying violated cut‐sets which can solve the problem to optimality, and we present computational results. We also present a novel greedy algorithm, our primary contribution, which can be used to solve for a high quality heuristic solution. We present computational analysis to evaluate the performance of our proposed approaches. © 2016 Wiley Periodicals, Inc. Naval Research Logistics 63: 236–246, 2016     

关于我国发展新型固定翼舰载机的几点建议

随着我国航母事业的发展,舰载机研发与制造产业得到了相应的发展。但是由于我国舰载机研发与制造产业起步晚,舰载机在技术性能等方面相比于西方国家还存在一定差距。文章以美国F-35"闪电Ⅱ"飞机研发历程为依据,对我国发展新型固定翼舰载机在设计、研发和维护等方面提出了建议,总结了值得我国研发人员借鉴的经验和教训。     

推进军队党内民主建设的创新工程——学习《中国共产党军队各级代表大会代表任期制实施办法(试行)》

中央军委颁发实施的<党代表任期制实施办法(试行)>,具有很强的思想性、规范性和可操作性,是推进军队党内民主建设的重大举措.要充分认清重大意义,提高贯彻落实<党代表任期制实施办法>的自觉性;准确把握内容实质,增强贯彻落实的针对性;建立健全保障措施,确保贯彻落实的实效性.     

军队思想政治建设实现“三个确保”的路径探索

军队思想政治建设实现"三个确保",必须以强化中国特色社会主义理论体系武装为首要任务;以培育当代革命军人核心价值观为重要抓手;以全面提高完成多样化军事任务能力为实践平台;以加强各级党组织建设为关键环节;以改进创新思想政治工作为强大动力.     

有源诱饵弹对抗毫米波制导武器仿真分析

有源诱饵弹是对抗毫米波制导武器的一种重要手段。根据毫米波雷达制导导弹波束窄的特点,采用投放多枚诱饵弹以组成诱饵阵的对抗方法。初步建立了对抗过程仿真的数学模型,并通过该模型对对抗过程进行了仿真分析。分析表明,如果依据形势合理布放诱饵,将会对目标起到很好的保护作用。     

1927-1949年国民政府军人抚恤观念之流变

军人抚恤是古今中外各国政府都必须面对的难题。经过长期的历史沿革，西方出现义务型抚恤观念，中国形成传统的恩赏型抚恤观念。南京国民政府建立后，军人抚恤观念在吸收西方现代抚恤因素的基础上，在受到多次冲击的前提下，也经历着鲜明的变迁过程，即由传统的恩赏型抚恤观念向现代义务型抚恤观念转变。