The building evacuation problem with shared information

In this article, the Building Evacuation Problem with Shared Information (BEPSI) is formulated as a mixed integer linear program, where the objective is to determine the set of routes along which to send evacuees (supply) from multiple locations throughout a building (sources) to the exits (sinks) such that the total time until all evacuees reach the exits is minimized. The formulation explicitly incorporates the constraints of shared information in providing online instructions to evacuees, ensuring that evacuees departing from an intermediate or source location at a mutual point in time receive common instructions. Arc travel time and capacity, as well as supply at the nodes, are permitted to vary with time and capacity is assumed to be recaptured over time. The BEPSI is shown to be NP‐hard. An exact technique based on Benders decomposition is proposed for its solution. Computational results from numerical experiments on a real‐world network representing a four‐story building are given. Results of experiments employing Benders cuts generated in solving a given problem instance as initial cuts in addressing an updated problem instance are also provided. © 2008 Wiley Periodicals, Inc. Naval Research Logistics, 2008     

基于物元分析法的航空事故应急预案评估方法

在深入研究并提出航空事故应急预案指标体系的基础上,结合物元分析法建立了航空事故应急预案的评估模型,将其应用于飞机冲出跑道的典型航空事故应急预案的评估中,根据评估结果提出了改进建议。研究成果可为航空机务部门制定预案并为实施评估提供一定参考,对进一步完善航空部队应急救援体系以及加强航空业的安全建设具有较高的研究价值。     

谈消防特勤队伍的建设与训练

通过系统地论述消防特勤队伍在队伍建设与训练中存在的不足以及应对措施,从而提高专业队伍的抢险救援能力。     

基于DSP的旋转弹用微小型导航系统设计

在无陀螺捷联惯导系统中,针对旋转弹体积小、功耗大、采样频率高、姿态变化快、解算周期短等问题。为满足旋转弹对其导航计算机的严格要求,提出了一种基于DSP的旋转弹用微小型导航系统设计,首先叙述了系统的总体方案设计,接着重点介绍了系统各模块的软硬件设计。本设计在硬件上节省了系统的体积和功耗,软件设计上节省了解算周期。     

都市圈石漠化区域采石场的生态恢复方法与措施探讨

都市圈石漠化区域采石场往往由于过度开发且未采取有效的恢复措施,致使生态环境破坏严重,严重影响了都市圈的生态环境和经济发展.在分析都市圈石漠化区域采石场生态恢复特点的基础上,论述了其生态恢复的基本方法及工程技术措施,指出都市圈石漠化区域采石场生态恢复应依据都市圈发展总体规划和景观生态学、景观建筑学及美学原理,采用开发性治理方法,综合运用多种工程技术措施恢复植被、整治水土流失并进行景观再造,从而满足都市圈对于景观的要求,提高土地利用价值,促进都市圈社会经济发展和城市生态环境建设.     

Weak aging properties for coherent systems with statistically dependent component lifetimes

As a relevant topic in reliability theory, the preservation of aging properties under the formation of various coherent structures contributes to improving system performance through better structure design and more effective system maintenance. The classical research in this line usually focuses upon coherent systems with independent component lifetimes. Recently, some authors discussed the preservation of IFR, NBU, and DMRL in the setting of dependent component lifetimes. This paper further investigates sufficient conditions for coherent systems with dependent component lifetimes to preserve aging properties including NBUC, NBU (2), DMRL, and their dual versions. Some examples are presented to illustrate coherent structures and typical copula functions fulfilling the present sufficient conditions as well.     

红外成像导引头抗干扰性能评估方法

给出了一种对地面复杂干扰环境的红外成像导引头抗干扰性能评估方法,分析了红外成像导引头所面临的干扰因素,结合实际战场情况对干扰环境的等级进行了划分,并详细设计了红外成像导引头抗干扰性能仿真测试方案。采用半实物仿真方法得到红外成像导引头在不同干扰环境下的实验数据,运用bayes估计的方法建立红外成像导引头抗干扰概率计算模型。结合某实物红外成像导引头开展抗干扰性能半实物仿真测试,实验结果验证了该方法的合理性和有效性。     

Dynamic inventory management with cash flow constraints

In this article, we consider a classic dynamic inventory control problem of a self‐financing retailer who periodically replenishes its stock from a supplier and sells it to the market. The replenishment decisions of the retailer are constrained by cash flow, which is updated periodically following purchasing and sales in each period. Excess demand in each period is lost when insufficient inventory is in stock. The retailer's objective is to maximize its expected terminal wealth at the end of the planning horizon. We characterize the optimal inventory control policy and present a simple algorithm for computing the optimal policies for each period. Conditions are identified under which the optimal control policies are identical across periods. We also present comparative statics results on the optimal control policy. © 2008 Wiley Periodicals, Inc. Naval Research Logistics 2008     

导弹智能故障诊断专家系统的一种实现方法

针对导弹系统故障诊断的特点,将人工神经网络和专家系统技术结合起来,设计开发了一种导弹智能故障诊断专家系统,阐述了其系统结构及设计原理,该方法克服了传统的基于规则的专家系统的某些缺陷,在实际运用中是可行的。     

越肩发射的两种方式

首先介绍了越肩发射的两种发射方式及其原理,然后对这两种方式的性能优劣进行了详细的比较和分析,最后讨论了越肩发射与以往攻击方式的不同和对未来空战所产生的影响及其应用情况,并得出了一些有益的结论。