基于递归算法的一类带缓冲区的混合生产调度

提出一种带缓冲区的混合生产的调度模型。通过缓冲区状态的扩展,将所建立的混合生产调度模型标准化,并在递归技术的基础上,利用混合整数规划方法求解,实例的仿真证明了本文方法的可行性与有效性。     

脉冲多普勒雷达频域跳盲与频域解模糊

针对脉冲多普勒雷达中的速度遮挡问题 ,提出了基于频域跳盲的PRF组合选择准则及其跳盲方法 ;针对脉冲多普勒雷达中的速度模糊 ,提出了一种用于解速度模糊的查表法 ,即通过预先存储固定表值 ,将获取的视在目标频率处理后在表中查找 ,从而得到实际目标频率。频域查表法实时性强 ,适于频域解模糊     

加载柔性臂振动的非线性应力反馈控制

用数值仿真的方法讨论了一种用新型的非线性应力反馈律来镇定加载柔性臂振动的问题。该方法使用跟踪微分器取得柔性臂根部应力信号的微分信号,并与根部应力信号一起组成非线性控制输入来控制加载柔性臂的振动.其镇定效果明显地优于有关问题的现有实验结果。     

Children's family change: reports and records of mothers, fathers and children compared

Family change, when adults depart or arrive around children, raises policy issues. Its measurement depends upon the evidence collected and from whom. This paper compares British children's histories obtained from fathers and mothers. The evidence, on one birth cohort of parents, comes from two sources: the National Child Development Study and the ONS Longitudinal Study. The resulting account of family change is not substantially different between parents. There is some under-reporting of children not living with their fathers. This is due to under-reporting by those included in the studies and to under-representation in them of absent fathers and lone parents.     

基于ADAMS/ATV的履带装甲车辆托带轮分布方案优选

履带装甲车辆的履带与托带轮的垂向冲击是产生冲击噪音和导致履带疲劳与断裂的重要因素。基于ADAMS软件中的ATV模块对某型履带装甲车辆建立了动力学模型，针对各托带轮所受履带的垂向冲击力大小不均匀的问题，综合动力学仿真分析，优选托带轮的分布方式，改善其动力学性能。     

一种多路聚合型CICOQ交换结构

提出了一种多路聚合型联合输入/交叉节点/输出排队(CICOQ)交换结构,并从理论上证明了当聚合路数等于2时,多路聚合型CICOQ交换结构无需加速即可通过分布式调度算法实现模拟采用任意调度算法的输出排队交换结构。最后从实现的角度给出了多路聚合型CICOQ交换结构的工程设计方案,并通过仿真对该方案的性能进行了验证。     

不确定性决策中完全信息获得的事前分析

明确了规范决策分析中信息的概念,介绍了信息获得与否的价值判断法。然后主要针对不确定性决策完全信息获得的事前分析进行了讨论,给出了单状态完全信息获得的概念和一个实际分析例子;同时对完全信息与风险态度的关系进行了简单的分析。     

可编程的VXI总线消息基接口芯片设计与实现

本文介绍了用大规模可编程逻辑器件设计和实现ＶＸＩ总线消息基接口芯片。该接口芯片具有中断ＲＯＲＡ、Ａ１６／Ｄ１６、Ａ２４／Ｄ３２及块传输能力,传输速率高达２０ＭＢ／ｓ。由于采用可重配置可编程逻辑器件,故很易实现ＶＸＩ总线Ａ３２／Ｄ３２的能力。     

White noise estimation for discrete-time systems with random delay and packet dropout

This paper is concerned with the optimal and suboptimal deconvolution problems for discrete-time systems with random delayed observations. When the random delay is known online, i.e., time stamped, the random delayed system is reconstructed as an equivalent delay-free one by using measurement reorganization technique, and then an optimal input white noise estimator is presented based on the stochastic Kahnan filtering theory. However, tb_e optimal white-noise estimator is timevarying, stochastic, and doesn＇t converge to a steady state in general. Then an alternative suboptimal input white-noise estimator with deterministic gains is developed under a new criteria. The estimator gain and its respective error covariance-matrix information are derived based on a new suboptimal state estimator. It can be shown that the suboptimal input white-noise estimator converges to a steady-state one under appropriate assumptions.     

Memetic algorithm for multi-mode resource-constrained project scheduling problems

A memetic algorithm （MA） for a multi-mode resourceconstrained project scheduling problem （MRCPSP） is proposed. We use a new fitness function and two very effective local search procedures in the proposed MA. The fitness function makes use of a mechanism called ＂strategic oscillation＂ to make the search process have a higher probability to visit solutions around a ＂feasible boundary＂. One of the local search procedures aims at improving the lower bound of project makespan to be less than a known upper bound, and another aims at improving a solution of an MRCPSP instance accepting infeasible solutions based on the new fitness function in the search process. A detailed computational experiment is set up using instances from the problem instance library PSPLIB. Computational results show that the proposed MA is very competitive with the state-of-the-art algorithms. The MA obtains improved solutions for one instance of set J30.