基于位置预测的靶场图像实时判读方法

在靶场经纬仪对目标实时跟踪测量时,会发生相机随机抖动的情况,引起目标在图像中大幅度运动。应对大幅度运动时,基于搜索窗口的跟踪方法容易丢失目标,而基于全图搜索的跟踪方法时效性差。针对以上问题,提出一种结合核相关滤波算法(Kernelized Correlation Filter, KCF)和目标位置预测的改进的跟踪学习检测算法(Tracking-Learning-Detection, TLD)跟踪框架。利用正交多项式最优线性滤波器及相机角度信息预测目标下一帧位置,在此区域利用KCF进行快速跟踪,可以提高跟踪的成功率和时效性,跟踪失败时再进行检测。仿真实验表明,最优线性滤波器能较准确预测目标位置,给KCF提供较准确的搜索位置,算法每帧耗时仅为1.1 ms,且定位精度优于TLD和KCF,能有效应对相机抖动的问题。靶场实际试验证明该方法可提高靶场自动判读水平,减少人工干预。     

美国应对外空国际条约的做法简析

针对现行国际空间法存在的诸多漏洞和缺陷,国际空间大国积极利用这些漏洞寻求开展外空试验的依据,并规避法律的约束以发展外空武器装备,使得外空存在被武器化的风险,外空军备竞赛日益激烈。因此,研究并利用外空条约、关注空间大国开展外空试验的现实做法,可以为开展外空活动提供借鉴和依据。本文重点研究了美国海基反卫试验和轨道快车试验,从试验背景、目的、对外口径以及对外反应几个方面,综合对比分析了试验的现实做法,剖析了美国应对外空条约的做法,从技术上、政策上和法律上得出了如何应对的方法和途径。研究成果可为我国合理合法地开展外空行动提供借鉴,从而赢得国际社会的认可。     

高层民用建筑总平面设计图消防审核的若干问题探讨

结合部分消防车辆性能参数,对高层民用建筑消防车道、扑救场地的设定进行了一一探讨,并明确了原则,以期设计、建设、规划等单位,在确保节省用地,符合规范的前提下,满足灭火救援需要。     

扁平大空间建筑烟气填充规律研究

采用理论计算和计算机模拟相结合的方法,研究了使用两种不同方式计算得到的扁平大空间建筑火灾烟气温度分布的特征和规律,并采用了将扁平大尺度空间划分为多个不同形式子单元的形式,对不同空间划分情形下火灾烟气温度和烟气层厚度的变化规律进行了研究,从而得出了扁平大空间建筑火灾烟气温度和厚度分布的规律,为研究此类建筑的烟气填充规律提供了一定的方法和思路。     

Capacitated warehouse location model with risk pooling

In this article, we introduce the capacitated warehouse location model with risk pooling (CLMRP), which captures the interdependence between capacity issues and the inventory management at the warehouses. The CLMRP models a logistics system in which a single plant ships one type of product to a set of retailers, each with an uncertain demand. Warehouses serve as the direct intermediary between the plant and the retailers for the shipment of the product and also retain safety stock to provide appropriate service levels to the retailers. The CLMRP minimizes the sum of the fixed facility location, transportation, and inventory carrying costs. The model simultaneously determines warehouse locations, shipment sizes from the plant to the warehouses, the working inventory, and safety stock levels at the warehouses and the assignment of retailers to the warehouses. The costs at each warehouse exhibit initially economies of scale and then an exponential increase due to the capacity limitations. We show that this problem can be formulated as a nonlinear integer program in which the objective function is neither concave nor convex. A Lagrangian relaxation solution algorithm is proposed. The Lagrangian subproblem is also a nonlinear integer program. An efficient algorithm is developed for the linear relaxation of this subproblem. The Lagrangian relaxation algorithm provides near‐optimal solutions with reasonable computational requirements for large problem instances. © 2008 Wiley Periodicals, Inc. Naval Research Logistics, 2008     

What you should know about location modeling

Facility location models have been applied to problems in the public and private sectors for years. In this article, the author first presents a taxonomy of location problems based on the underlying space in which the problem is embedded. The article illustrates problems from each part of the taxonomy with an emphasis on discrete location problems. Selected recent research in the area is also discussed. © 2008 Wiley Periodicals, Inc. Naval Research Logistics, 2008     

Analysis and optimal design of discrete order picking technologies along a line

Order picking accounts for most of the operating expense of a typical distribution center, and thus is often considered the most critical function of a supply chain. In discrete order picking a single worker walks to pick all the items necessary to fulfill a single customer order. Discrete order picking is common not only because of its simplicity and reliability, but also because of its ability to pick orders quickly upon receipt, and thus is commonly used by e‐commerce operations. There are two primary ways to reduce the cost (walking distance required) of the order picking system. First is through the use of technology—conveyor systems and/or the ability to transmit order information to pickers via mobile units. Second is through the design—where best to locate depots (where workers receive pick lists and deposit completed orders) and how best to lay out the product. We build a stochastic model to compare three configurations of different technology requirements: single‐depot, dual‐depot, and no‐depot. For each configuration we explore the optimal design. © 2008 Wiley Periodicals, Inc. Naval Research Logistics, 2008     

Analysis of a finite‐buffer bulk‐service queue with discrete‐Markovian arrival process: D‐MAP/Ga,b/1/N

Discrete‐time queues with D‐MAP arrival process are more useful in modeling and performance analysis of telecommunication networks based on the ATM environment. This paper analyzes a finite‐buffer discrete‐time queue with general bulk‐service rule, wherein the arrival process is D‐MAP and service times are arbitrarily and independently distributed. The distributions of buffer contents at various epochs (departure, random, and prearrival) have been obtained using imbedded Markov chain and supplementary variable methods. Finally, some performance measures such as loss probability and average delay are discussed. Numerical results are also presented in some cases. © 2003 Wiley Periodicals, Inc. Naval Research Logistics 50: 345–363, 2003.     

攻击机无源侦察定位原理研究

机载无源定位是判断反辐射导弹是否位于攻击区的根据,阐述了装挂反辐射导弹的攻击机应用改进雷达告警器或雷达告警器交联反辐射弹对有威胁的辐射目标无源定位的原理,并对其定位精度进行了研究。     

坦克和自行火炮的简单定位定向方法

应自行武器间瞄射击的要求,提出了测定装甲机械化分队各车体方位的原则和简单方法,并对此测算方法进行了误差分析,然后以某分队为例,分别测算了指挥车和队属单车的车体方位和误差,结果表明该定位定向方法能够满足自行武器间瞄准射击的要求,可供装备自行武器的部队在射击训练时参考。