模糊综合评判方法在雷达技术等级评定中的应用

以影响雷达战术性能的重要程度为依据,选定主要技术指标为因素集,采用模糊综合评判的方法对雷达技术等级进行评判.提出了一种以测试数据为基础的针对每一个因素的单因素评判方法,并以某型雷达装备的技术等级评定为例,给出了模糊综合评判的详细求解过程.所提出的评判方法可运用于雷达装备大修后的技术等级评定.     

信息化建设相对滞后的企业如何开展CALS工作

CALS工作与企业信息化紧密联系。本文分析了信息化相对落后企业的现状及原因,对企业如何开展CALS工作提出了具体做法,并就应重点处理的问题进行了阐述。     

考虑多类资源的多任务并行维修过程Petri网建模

针对基本Petri网在建立多种任务共享多类资源情况下的复杂并行维修过程时存在的结构复杂化问题,应用网抽象原理,由简入繁,将库所变迁网模型逐步转化为常量弧有色网和有色网模型,由单类任务/单类资源、单类任务/多类资源模型逐步建立了考虑多类资源的多任务并行维修过程模型。采用Petri网仿真分析工具ExSpect对有色网模型进行了实例研究。结果表明：模型具有通用性,便于仿真实现。     

Kernel estimation of quantile sensitivities

Quantiles, also known as value‐at‐risks in the financial industry, are important measures of random performances. Quantile sensitivities provide information on how changes in input parameters affect output quantiles. They are very useful in risk management. In this article, we study the estimation of quantile sensitivities using stochastic simulation. We propose a kernel estimator and prove that it is consistent and asymptotically normally distributed for outputs from both terminating and steady‐state simulations. The theoretical analysis and numerical experiments both show that the kernel estimator is more efficient than the batching estimator of Hong 9 . © 2009 Wiley Periodicals, Inc. Naval Research Logistics 2009     

空军雷达兵部队计量保障信息管理系统平台设计

在现有指挥自动化网络的基础上,针对雷达装备计量保障信息化建设,提出构建空军雷达兵部队计量保障信息管理系统平台,给出平台的体系结构、数据库设计和系统平台的工作流程等初步设计方案,为提高雷达装备计量保障信息化管理提供了前期的技术预研.经实际应用证明,该设计方案能够较好的解决雷达装备计量保障资源信息管理和计量保障计划的自动生成等问题.     

Optimal production ramp-up in the smartphone manufacturing industry

Motivated by challenges in the smartphone manufacturing industry, we develop a dynamic production ramp-up model that can be applied to economically satisfy nonstationary demand for short-life-cycle products by high-tech companies. Due to shorter life cycles and more rapid evolution of smartphones, production ramp-up has been increasingly critical to the success of a new smartphone. In the production ramp-up, the key challenge is to match the increasing capacity to nonstationary demand. The high-tech smartphone manufacturers are urged to jointly consider the effect of increasing capacity and decreasing demand. We study the production planning problem using a high-dimensional Markov decision process (MDP) model to characterize the production ramp-up. To address the curse of dimensionality, we refine Monte Carlo tree search (MCTS) algorithm and theoretically analyze its convergence and computational complexity. In a real case study, we find that the MDP model achieves revenue improvement by stopping producing the existing product earlier than the benchmark policy. In synthetic instances, we validate that the proposed MCTS algorithm saves computation time without loss of solution quality compared with traditional value iteration algorithm. As part of the Lenovo production solution, our MDP model enables high-tech smartphone manufacturers to better plan the production ramp-up.     

空间非合作目标捕获方法综述

随着空间事故和失效航天器的增多,地球附近的轨道资源越来越紧张。如今世界各国都在大力发展在轨服务和太空碎片清除,作为其中最关键的技术之一,空间非合作目标捕获近年来成了太空研究领域的重点。目前,国内外各大研究机构针对非合作目标进行了深入研究,并提出了多种捕获方法,取得了较大的进展。对非合作目标进行分类,基于现有的捕获方法介绍了国内外非合作目标捕获技术发展的最新状况,总结了原理方案,分析了捕获方法和关键技术,为我国后续开展相关研究提供了一种研究思路。     

基于HHT的助飞反潜鱼雷入水信号检测方法

针对助飞反潜鱼雷入水信号在浅海条件下信噪比低、干扰成分多导致难以检测的问题,采用HHT处理方法,通过CEEMD分解方法提高原始信号的信噪比;通过希尔伯特变换突出入水信号的时域特征,降低了入水信号检测的难度。所提方法应用于实航试验数据,显著提高了信号检测的可靠性。     

Technical note: Reexamination of all‐or‐none inspection policies in a supply chain with endogenous product quality

This note studies the optimal inspection policies in a supply chain in which a manufacturer purchases components from a supplier but has no direct control of component quality. The manufacturer uses an inspection policy and a damage cost sharing contract to encourage the supplier to improve the component quality. We find that all‐or‐none inspection policies are optimal for the manufacturer if the supplier's share of the damage cost is larger than a threshold; otherwise, the manufacturer should inspect a fraction of a batch. © 2008 Wiley Periodicals, Inc. Naval Research Logistics, 2008