FMADM供输弹系统故障模式危害性分析

针对某型火炮供输弹系统的可靠性差和故障率高等缺陷,运用模糊多属性决策的方法(FMADM)对供输弹系统的故障模式进行危害性分析。将严酷度类别、发生概率等级、检测难度等级和修复难度等级作为评价其危害性的属性,同时引入梯形模糊数来表示属性的权重,利用逼近理想点(TOPSIS)方法,根据求得的理想解的相对贴近度来对故障模式的危害性进行排序,进而确定出系统的关重件,为进一步降低供输弹系统故障率奠定基础。     

准确界定马克思主义中国化的历史进程

马克思主义中国化经历第一次历史性飞跃及其第一大理论成果毛泽东思想和第二次历史性飞跃及其第二大理论成果中国特色社会主义理论体系两个大阶段,在第一个大阶段中,经历新民主主义革命理论、社会主义革命理论和社会主义建设理论三个小阶段,在第二个大阶段中,经历邓小平理论、“三个代表”重要思想和科学发展观重大战略思想等若干个小阶段。     

一种航空武器数据链MAC协议设计与研究

MAC协议是航空武器数据链组网通信的重要技术,网络的性能依赖于所采用的多址接入协议,也是航空武器数据链研究的难点之一。固定分配、竞争和预约三大类MAC协议各有优缺点以及适应场景,需要根据应用需求设计对应的多址接入协议,以满足通信网络的战术和技术性能指标。在分析数字化战场通信网络——战术数据链组网通信应用的主要MAC协议的基础上,结合航空武器数据链的通信特点和体系结构,提出一种基于固定分配TDMA的航空武器数据链MAC协议——ODTCFMA协议,并对协议的时延性能进行了仿真和分析。分析结果表明,该协议能够同时满足编队战术协同和武器制导的低时延要求,对航空武器数据链的研究具有一定的借鉴意义。     

一种新的高脉冲重复频率雷达多假设跟踪方法

高脉冲重复频率雷达目标跟踪时面临解距离模糊问题。现有方法需要在每个驻留时间内至少2帧检测到目标才能解距离模糊,新近提出的多假设方法虽然可以克服这一不足,但当模糊区间发生变化时会出现解距离模糊错误的情况。针对该问题,提出一种新的多假设方法,基于统计距离最小原则获取正确假设区间以实现目标跟踪,从而克服了现有多假设方法的不足。仿真表明该方法的收敛速度和跟踪精度均优于现有多假设方法。     

MEFP智能雷攻击坦克毁伤效能分析

以智能雷为研究对象,在建立智能雷扫描运动模型和命中毁伤模型的基础上,分析了MEFP智能雷攻击坦克的毁伤效能.通过建立攻击过程的蒙特卡洛模型,编制了智能雷攻击坦克目标的计算机仿真软件,计算了MEFP智能雷发射不同数目的EFP对坦克目标的毁伤概率.结果表明:MEFP智能雷攻击坦克目标的毁伤效能较高,可应用于对付大规模坦克装甲车辆的进攻和武装直升飞机的攻击.     

用科学发展观指导部队基层建设的实践与思考

从科学发展观的基本内涵出发,针对基层部队建设中存在的普遍问题,从全面建设、统筹规划、保持创新三个方面进行了论证,回答了科学发展观是指导部队基层建设的灵魂这个重大问题。     

Joint pricing,assortment, and inventory decisions for a retailer's product line

Consider a set of product variants that are differentiated by some secondary attributes such as flavor, color, or size. The retailer's problem is to jointly determine the set of variants to include in her product line (“assortment”), together with their prices and inventory levels, so as to maximize her expected profit. We model the consumer choice process using a multinomial logit choice model and consider a newsvendor type inventory setting. We derive the structure of the optimal assortment for some important special cases, including the case of horizontally differentiated items, and propose a dominance relationship for the general case that simplifies the search for an optimal assortment. We also discuss structural properties of the optimal prices. Finally, motivated by our analytical results, we propose a heuristic solution procedure, which is shown to be quite effective through a numerical study. © 2007 Wiley Periodicals, Inc. Naval Research Logistics, 2007     

On valuing appreciating human assets in services

This paper derives optimal policies for when to hire, train, and lay off employees in service organizations when worker productivity appreciates deterministically or stochastically under constant, monotonic, and cyclic service demand. The model, an extension of the machine replacement problem from the engineering economy literature, uses infinite horizon linear programming to produce optimal personnel planning strategies and dual prices that characterize the workforce's economic value. The effect of employee attrition is also considered. In its valuation of human assets, unlike pure accounting approaches that only try to measure, this paper proposes an approach to capture the interaction between firm decisions pertaining to human resources and human resource value. © 2006 Wiley Periodicals, Inc. Naval Research Logistics, 2007     

Success and failures of the Gripen offsets in the Visegrad Group countries

The Soviet-led Council for Mutual Economic Assistance member, Central European countries found themselves in a difficult political and economic situation after the collapse of the Soviet Union. Three post-Eastern Bloc countries formed the Visegrad Group to strengthen their ties to the West, but the need for foreign investment, job creation and technology transfer was urgent.

This is when military modernisation also came into the picture and the counter-trade—as known as offset—as a tool to help these economies. A trade practice which was meant to energise these economies via defence acquisitions linked economic programmes.

Two Visegrad Group member countries, Hungary and the Czech Republic decided to sign offset agreement with the defence firm SAAB to license Gripen fighter aircrafts. This study intends to analyse if these deals were able to help governments to reach their objectives or the two countries were unable to take advantage of the offset programmes.