飞行器有源对消隐身技术

隐身技术已经成为现代高性能飞行器设计的重要支撑,是先进战机的基本要求。现行的隐身设计方法主要包括气动外形优化以及隐身材料涂覆。随着雷达探测能力的不断提升,尤其在米波雷达探测背景下,外形优化与隐身涂层变得不再有效,有源隐身技术被重新予以重视并有望成为新的隐身技术突破点。本文着重分析了有源对消技术的基本概念、技术现状以及相应的关键技术,对该技术体制的优势和特点进行了归纳和总结。     

飞机再次出动保障活动设计方法

飞机再次出动保障活动所需时间长短对提升飞机的作战效能至关重要,针对当前在飞机保障资源有限约束条件下,再次出动保障活动工期最短难以实现的难题,提出了基于分支切割法的再次出动保障活动时间优化方法。该方法以飞机再次出动保障活动所需时间最短为目标,以有限的保障人员和保障作业间逻辑关系为约束条件,可计算出时间最短的飞机再次出动保障活动具体流程,并用VB6.0编制成计算机程序,开发了飞机再次出动保障活动分析系统。最后,对某型飞机真实保障活动进行了实例分析,结果表明,使用该方法计算得到的结果准确、可靠,与实际保障情况相符,可为飞机再次出动保障与决策提供指导,提升保障活动的自动化水平,具有很好的工程应用价值。     

Spaghetti: systems thinking and the US Army

In the mid-2000s, the United States Army was embroiled in counterinsurgency missions in Iraq and Afghanistan that required deeper understanding of local social systems. The Army turned to systems thinking and design thinking to model and understand the world, define problems, and develop approaches to strategic and operational challenges. However, the Army’s approach as expressed in publications and doctrine encourages the development of complicated, unsupported, and unfalsifiable hypotheses. The risk is that the Army will act on incorrect assumptions and develop plans that are fragile.     

基于仿真推演的导弹作战实验框架分析与设计

针对导弹武器论证设计高成本、高复杂度的问题，本文梳理了导弹作战实验设计服务的多种功能需求，阐述了导弹作战实验设计的数理方法；为构建具有较好柔性的导弹作战实验仿真框架，针对导弹系统多个性能指标，辨析了各类导弹作战实验仿真变量；针对作战实验中的环境和装备特性，梳理了导弹作战实验模型体系，提出了仿真新模型开发框架；结合导弹作战实验案例，构建了实验设计优化方法，提出了作战实验检验设计方案；从运行实验出发，阐述了设定作战想定、建立控制机制、开展结果分析等仿真环节的具体设计。通过这些工作，形成了一种支撑导弹作战实验的柔性仿真框架，为进一步开展基于仿真推演的导弹作战实验提供参考。     

Quality control chart design under Jidoka

We consider design of control charts in the presence of machine stoppages that are exogenously imposed (as under jidoka practices). Each stoppage creates an opportunity for inspection/repair at reduced cost. We first model a single machine facing opportunities arriving according to a Poisson process, develop the expressions for its operating characteristics and construct the optimization problem for economic design of a control chart. We, then, consider the multiple machine setting where individual machine stoppages may create inspection/repair opportunities for other machines. We develop exact expressions for the cases when all machines are either opportunity‐takers or not. On the basis of an approximation for the all‐taker case, we then propose an approximate model for the mixed case. In a numerical study, we examine the opportunity taking behavior of machines in both single and multiple machine settings and the impact of such practices on the design of an X – Q C chart. Our findings indicate that incorporating inspection/repair opportunities into QC chart design may provide considerable cost savings. © 2009 Wiley Periodicals, Inc. Naval Research Logistics 2009     

Optimizing fishbone aisles for dual‐command operations in a warehouse

Unit‐load warehouses store and retrieve unit‐loads, typically pallets. When storage and retrieval operations are not coordinated, travel is from a pickup and deposit (P&D) point to a pallet location and back again. In some facilities, workers interleave storage and retrieval operations to form a dual‐command cycle. Two new aisle designs proposed by Gue and Meller (“Improving the unit‐load warehouse.” In Progress in Material Handling Research: 2006. Material Handling Industry of America, Charlotte, NC, 2006) use diagonal aisles to reduce the travel distance to a single pallet location by approximately 10 and 20[percnt] for the two designs, respectively. We develop analytical expressions for travel between pallet locations for one of these—the fishbone design. We then compare fishbone warehouses that have been optimized for dual‐command to traditional warehouses that have been optimized in the same manner, and show that an optimal fishbone design reduces dual‐command travel by 10–15%. © 2009 Wiley Periodicals, Inc. Naval Research Logistics 54: 389–403, 2009     

某文化广场性能化防火设计及其关键问题研究

地下空间的广泛开发利用给防火安全带来了很多新的问题，现有的：处方式建筑防火规范严重滞后于现代建筑对消防设计的要求。结合杭州波浪文化广场具体工程设计中存在的问题，利用火灾模拟和火灾安全工程学进行火灾风险评估，借助区域模拟软件CFAST对防火分区火灾蔓延、烟气运动过程进行模拟和定量分析，提出优化设计意见，并在工程设计中得到了应用。     

煤焦化工程火灾危险性及消防设计探析

从焦化工程的工艺流程出发，分析了其火灾危险性，提出了基本消防设计对策，为我国编制出台《煤化工防火设计规范》，从根本上解决煤化工工程在防火设计、建设施工、消防审核和验收中遇到的难题，提供理论依据。     

新型气泡雾化细水雾灭火系统的研制与开发

将气泡雾化技术引入到消防领域，研制并开发了一套新型细水雾灭火系统，着重设计和制作了系统的关键部件——气泡雾化喷头。该系统具有工作压力低、雾化流量小、不易堵塞以及安全可靠等优点。在此基础上，利用所研制的气泡雾化细水雾系统进行了汽油火的实体灭火实验，灭火效果良好。     

海洋水下战场态势仿真系统的设计与实现?

在作战仿真领域，由于水下战场环境的特殊性以及水下作战对抗的复杂性，构建具有水下战场实景态势展现以及水下作战对抗演示分析等功能的仿真系统始终是一个难点问题。基于现代海战条件下水下对抗的应用背景，设计实现了海洋水下战场态势仿真系统，给出系统的功能结构、功能流程以及数据处理流程和方案，并对系统的开发部署进行了具体实现，应用情况表明系统能够实现对水下战场实景态势的高精度仿真，可作为海洋水下战场实景态势的演示分析研究平台和水下作战对抗的论证评估工具。