An exact branch‐and‐price algorithm for multitasking scheduling on unrelated parallel machines

We consider the multitasking scheduling problem on unrelated parallel machines to minimize the total weighted completion time. In this problem, each machine processes a set of jobs, while the processing of a selected job on a machine may be interrupted by other available jobs scheduled on the same machine but unfinished. To solve this problem, we propose an exact branch‐and‐price algorithm, where the master problem at each search node is solved by a novel column generation scheme, called in‐out column generation, to maintain the stability of the dual variables. We use a greedy heuristic to obtain a set of initial columns to start the in‐out column generation, and a hybrid strategy combining a genetic algorithm and an exact dynamic programming algorithm to solve the pricing subproblems approximately and exactly, respectively. Using randomly generated data, we conduct numerical studies to evaluate the performance of the proposed solution approach. We also examine the effects of multitasking on the scheduling outcomes, with which the decision maker can justify making investments to adopt or avoid multitasking.     

新形势下企业标准化工作创新的思考

“十一五期间，企业标准化，如何适应当前的形势，适应改革发展要求，创新标准化管理，借企业改革改制之势，剔除不适应企业经营发展的部分，强化管理职能，更好地为生产经营服务，从而充分发挥标准化在企业的基础管理作用，为企业和社会赢得更好的经济效益和社会效益，针对这些问题，作者根据自己多年从事标准化工作的经验提出了自己的看法。     

无人机运动模糊图像复原技术

在无人机飞行过程中,由于成像系统会受到相对运动、姿态变化、机械振动、镜头离焦以及大气湍流效应等影响,造成获取的图像产生退化.由于图像复原问题通常情况下是病态的,综合利用了无人机运动的先验信息,提出了不同运动模糊情况下点扩散函数的估计方法,采用维纳滤波复原算法估计图像,给出了适用于无人机成像制导系统的图像复原方案.最后经仿真实验证明,该算法图像复原效果好,计算量小,抗噪声鲁棒性强,有较大的工程应用价值.     

GJB 908A-2008《首件鉴定》实践应用浅析

本文主要是结合工作实践,从全面把握标准内涵、综合掌握相关的信息,开展首件鉴定工作的条款要求等方面对GJB 908A-2008实践应用的认识和体会。     

浅析军用火工品与民爆器材技术标准的通用问题

本文对现行军用火工品和民用爆破器材技术标准的体系、水平、互相通用的必要性和原则以及可能性进行了分析，在此基础上，提出了军用火工品和民用爆破器材技术标准通用可能性的结论意见。     

美国军用手册217F与GJB/Z 299B比较研究

分析美国军用手册217F相对GJB/Z 299B在可靠性预计总体论述上的差异,指出可靠性预计的作用和局限性,具体比较可靠性预计模型,并探讨在军用标准中引入开放系统思想。     

美俄日国防科技工业管理体制及特点

当前,我国国防科技工业管理体制改革正在不断深化,充分吸收和借鉴美国、俄罗斯、日本等军工大国的国防科技工业管理经验,必定有助于我们选择科学的、符合国防科技工业管理规律的管理体制。本文总结分析了美国、俄罗斯和日本的国防科技工业管理体制及特点,并对我国国防科技工业管理体制改革提出了几点启示。     

“支部建在连上”新论

“支部建在连上”是“三湾改编”的伟大创举，是“古田会议决议”的重要精髓。贯彻这一基本原则和根本制度，具有丰富的历史经验和深刻的现实启示。     

Revenue management under randomly evolving economic conditions

We consider a dynamic pricing model in which the instantaneous rate of the demand arrival process is dependent on not only the current price charged by the concerned firm, but also the present state of the world. While reflecting the current economic condition, the state evolves in a Markovian fashion. This model represents the real‐life situation in which the sales season is relatively long compared to the fast pace at which the outside environment changes. We establish the value of being better informed on the state of the world. When reasonable monotonicity conditions are met, we show that better present economic conditions will lead to higher prices. Our computational study is partially calibrated with real data. It demonstrates that the benefit of heeding varying economic conditions is on par with the value of embracing randomness in the demand process. © 2015 Wiley Periodicals, Inc. Naval Research Logistics 66:73–89,2019     

国民经济动员在可持续发展战略中的地位

可持续发展战略具有极为深刻的内涵，国家的安全与稳定是可持续发展的基础，可持续发展观中应有国防属性的位置。国民经济动员是保障国家安全的重要手段，因此，必须承认国民经济动员在可持续发展战略中的重要地位。