舰艇编队导弹航路规划仿真系统设计与实现

通过分析火力分配、区域划分、航路规划三者的关系,提出了舰艇编队导弹航路规划三位一体战术决策的思想.设计了一个以此为背景,基于高层体系结构(HLA)的可扩展、开放式仿真体系结构.依据HLA/RTI规范,设计开发了仿真联邦的联邦/仿真对象模型.基于系统的离散事件仿真特征,采用事件调度的仿真策略,利用Petri网建立了系统的...     

Fashion products with asymmetric sales horizons

In this study, we explore an inventory model for a wholesaler who sells a fashion product through two channels with asymmetric sales horizons. The wholesaler can improve profitability by employing joint procurement and inventory reallocation as a recourse action in response to the dynamics of sales. In this research, a simple stochastic programming model is analyzed to specify the properties of the optimal inventory decisions. © 2011 Wiley Periodicals, Inc. Naval Research Logistics, 2011     

基于响应平面法的压力容器可靠性评定

针对压力容器制造、使用过程中各种参数的不确定性,提出了一种基于响应平面的随机分析方法.根据某压力容器的结构特点,确定性有限元分析采用了接触有限元,结合中心组合抽样设计构建了容器最大应力的响应平面,以此为基础对压力容器应力分布进行了随机分析.可靠性分析中引入应力—强度干涉模型,并分别对容器壁面和接管处进行了可靠性评定.实...     

带有状态滞后的连续广义系统的鲁棒正实控制﹡

对带有状态滞后的连续广义系统的严格正实性进行了分析,得出了这类系统渐近稳定且严格正实的充分条件,该充分条件与滞后无关。进一步地,对这类系统带有不确定性和控制量的情况进行了研究。提出了一种基于线性状态反馈控制的鲁棒正实控制器设计方法,使得控制器设计可以通过求解线性矩阵不等式方便地加以解决,且保证了闭环系统的严格正实性。最后,通过实例分析说明所提出的鲁棒正实控制器设计方法是可行的、有效的。     

TPN在军事通信系统效能分析中的应用

Petri网是系统分析建模的有力工具.时间Petri网(TP-网或TPN)作为一种高级Petri网有着广泛的应用.首先简单介绍了时间Petri网的发展过程、基本组成,军事通信系统的效能评估的典型方法;然后根据Petri网建立了系统效能分析的动态模型和军事通信系统效能分析的TPN模型,并分析了该模型在军事通信系统效能分析中的优缺点.     

基于模糊时间Petri网的决策融合模型及时间推理

针对常规导弹旅作战指挥决策过程中伴随大量随机、并发情况的特点,提出利用线性逻辑给出的模糊时间Petri网来描述作战指挥决策融合过程。通过建立相应的FTPN模型,并利用时间推理的方法来分析模糊时间Petri网的运行行为,说明其在作战指挥决策融合中的应用。     

一种基于广义Hough变换的遥感图像船舶横波自动检测与速度估计方法

从Kelvin横波航迹的形成原理出发,详细推导了Kelvin横波波峰模型,提出一种基于广义Hough变换的遥感图像船舶横波自动检测方法,取得了较好的检测效果,并依据检测结果对船舶速度进行了估计。所述方法对海上船舶运输和港口管理等具有重要意义。     

An inspection game: Taking account of fulfillment probabilities of players' aims

This paper deals with an inspection game of customs and a smuggler. The customs can take two options of assigning a patrol or not. The smuggler has two strategies of shipping its cargo of contraband or not. Two players have several opportunities to take actions during a limited number of days. When both players do, there are some possibilities that the customs captures the smuggler and, simultaneously, the smuggler possibly makes a success of the smuggling. If the smuggler is captured or there remain no days for playing the game, the game ends. In this paper, we formulate the problem into a multi‐stage two‐person zero‐sum stochastic game and investigate some characteristics of the equilibrium solution, some of which are given in a closed form in a special case. There have been some studies so far on the inspection game. However, some consider the case that the smuggler has only one opportunity of smuggling or the perfect‐capture case that the customs can certainly arrest the smuggler on patrol, and others think of a recursive game without the probabilities of fulfilling the players' purposes. In this paper, we consider the inspection game taking account of the fulfillment probabilities of the players' aims. © 2006 Wiley Periodicals, Inc. Naval Research Logistics, 2006     

非线性随机动态响应的高效模拟方法

提出了一种分析多自由度非线性系统在随机激励下响应的高效模拟方法。该方法以蒙特卡罗方法为基础,针对动态问题,建立了有效的重要性判别准则,采用俄罗斯轮盘赌与分裂方法来处理响应样本,增加了样本在低失效概率区域出现的几率,提高了模拟效率。通过两个算例表明,该方法操作简单,可以大大地减少计算量,能够适用于实际的工程问题。     

A stochastic programming approach for chemotherapy appointment scheduling

Chemotherapy appointment scheduling is a challenging problem due to the uncertainty in premedication and infusion durations. In this paper, we formulate a two‐stage stochastic mixed integer programming model for the chemotherapy appointment scheduling problem under limited availability of nurses and infusion chairs. The objective is to minimize the expected weighted sum of nurse overtime, chair idle time, and patient waiting time. The computational burden to solve real‐life instances of this problem to optimality is significantly high, even in the deterministic case. To overcome this burden, we incorporate valid bounds and symmetry breaking constraints. Progressive hedging algorithm is implemented in order to solve the improved formulation heuristically. We enhance the algorithm through a penalty update method, cycle detection and variable fixing mechanisms, and a linear approximation of the objective function. Using numerical experiments based on real data from a major oncology hospital, we compare our solution approach with several scheduling heuristics from the relevant literature, generate managerial insights related to the impact of the number of nurses and chairs on appointment schedules, and estimate the value of stochastic solution to assess the significance of considering uncertainty.