归因理论对英语教学的启示

本文通过对归因理论的阐述和对学生学业状况的归因倾向分析,提出了归因理论对英语教学的启示:一要关注学生的归因反应;二要研究学生的归因倾向,引导学生正确归因;三要重视培养学生的情感智力和认知技能;四要对教师自身的教学工作进行正确的归因。     

模糊合成算子在作战方案综合评估的应用研究

在分布式交互仿真中,根据仿真结果对作战方案进行综合评估,运用模糊综合评判的方法进行评判,并着重对合成算子的选择进行分析,确定乘与有界算子M(·, )为比较适合对作战方案评估的算子.     

由“波音737max事件”引发的对信息智能时代武器装备质量管理的思考

本文基于"波音737max事件"这一新世纪以来最严重的系列空难,对事件发生过程进行还原性概述,发现空难事故主要由于硬件装备设计与软件装备质量存在问题,指出了波音公司的质量管理在认识程度、管理体系、信息交流和检测方法等方面存在问题,由此引发出对信息智能时代武器装备质量管理的思考。本研究以"波音737max事件"为基础,围绕信息智能时代特点,结合我国装备质量管理存在的问题,对加强信息智能时代武器装备质量管理提出了树立正确认识、完善质量管理体系、加强信息交流和强化人才队伍建设等建议,以期为强军之旅保驾护航。     

Disruption management in production planning

We study the problem of recovering a production plan after a disruption, where the disruption may be caused by incidents such as power failure, market change, machine breakdown, supply shortage, worker no‐show, and others. The new recovery plan we seek after has to not only suit the changed environment brought about by the disruption, but also be close to the initial plan so as not to cause too much customer unsatisfaction or inconvenience for current‐stage and downstream operations. For the general‐cost case, we propose a dynamic programming method for the problem. For the convex‐cost case, a general problem which involves both cost and demand disruptions can be solved by considering the cost disruption first and then the demand disruption. We find that a pure demand disruption is easy to handle; and for a pure cost disruption, we propose a greedy method which is provably efficient. Our computational studies also reveal insights that will be helpful to managing disruptions in production planning. © 2005 Wiley Periodicals, Inc. Naval Research Logistics, 2005.     

A chessboard model of the U‐boat war in the Atlantic with applications to signals intelligence

This paper uses a simple Monte Carlo model to analyze the influence of signals intelligence on the Second World War's Battle of the Atlantic. The principle measure of effectiveness is the number of U‐boat days of attack to which convoys were subjected. A secondary measure is the number of convoyed ships sunk. The model is validated against historical data and then used to explore the effectiveness of the two sides' signals intelligence. Allied use of signals intelligence is shown to have been capable of completely offsetting German use of signals intelligence, and then some. © 2003 Wiley Periodicals, Inc. Naval Research Logistics, 2005     

基于DCSP的编队武器兼容性约束协调

编队武器兼容性约束协调,是一个典型的求解分布式约束满足问题的过程。针对这一特点,建立了编队武器兼容性约束满足问题模型,提出了一种基于异步回溯的分布式约束满足算法。该算法运用异步回溯获得一个初始可行解,然后以作战效能最优为原则增添新的方案,并进行约束一致性检查,最终得到满意的编队武器运用方案。仿真验证了算法的可行性。     

基于PCB技术的延时线设计方法

为了设计大功率低损耗的延时线,提出了用多股窄印制线并行绕制替代单股印制线绕制、在某些特定位置将并绕的多股印制线交叉换位的多层PCB螺旋电感的设计方法,并用该电感和电容模拟电缆的分布参数电感和电容制作延时线。通过多股并绕交叉换位的方式可以增加电感的有效截面积,减小电感的涡流损耗,有效提高电感的品质因数。测试结果表明:该螺旋电感的品质因数在短波频段内有较大提高。利用该螺旋电感制作的200ns延时线在通1A电流50 W功率时,延时性能好、驻波比小、衰减量小,满足大功率低损耗的要求。     

分布式干扰下雷达组网探测效能分析

针对雷达和干扰机两种重要组网体系的战术对抗应用,采用等效噪声功率谱密度表征干扰特性,推导出多干扰源下的雷达探测距离方程;并提出了区域网格融合算法,实现了分布式干扰下雷达网不规则探测区域绘制;对于评估雷达网作战效能具有重要工程应用价值。     

Averaging frameworks for simulation optimization with applications to simulated annealing

We present two frameworks for designing random search methods for discrete simulation optimization. One of our frameworks is very broad (in that it includes many random search methods), whereas the other one considers a special class of random search methods called point‐based methods, that move iteratively between points within the feasible region. Our frameworks involve averaging, in that all decisions that require estimates of the objective function values at various feasible solutions are based on the averages of all observations collected at these solutions so far. Also, the methods are adaptive in that they can use information gathered in previous iterations to decide how simulation effort is expended in the current iteration. We show that the methods within our frameworks are almost surely globally convergent under mild conditions. Thus, the generality of our frameworks and associated convergence guarantees makes the frameworks useful to algorithm developers wishing to design efficient and rigorous procedures for simulation optimization. We also present two variants of the simulated annealing (SA) algorithm and provide their convergence analysis as example application of our point‐based framework. Finally, we provide numerical results that demonstrate the empirical effectiveness of averaging and adaptivity in the context of SA. © 2012 Wiley Periodicals, Inc. Naval Research Logistics, 2012     

面向能耗有效高性能嵌入式微处理器的VLIW调度

为了降低功耗,目前能耗有效的嵌入式微处理器一般都采用分布式与层次化的寄存器文件结构。第一层的超小寄存器文件(TORF)的极小容量使得很多数据必须存放到第二层的通用寄存器文件(GRF)中,这给编译器带来了新的挑战。通过分析程序特征,提出了新的VLIW调度算法,通过在编译时对变量进行检测,在恰当的时机插入虚拟的copy操作并进行指令与通信调度,为对寄存器需求较大的全局变量与软流水变量构建了新的包含GRF的数据传输路由,将对TORF的压力转移到GRF中。实验结果表明,新的VLIW调度算法符合处理器的设计初衷。与不使用GRF相比,在程序性能只降低约8%的情况下,降低了约51%的寄存器访问能耗,43%的处理器能耗。最关键的是避免了程序员手工分配优化的难题。