基于联合EDF和多模板的天波雷达波位调度方法

天波超视距雷达能够同时探测空中目标和海面目标,具备执行多任务的能力,为优化整体探测效能,必须考虑波位调度问题。借鉴相控阵雷达资源调度思想,结合天波超视距雷达工作方式和任务特点,研究了一种修正截止优先(earliest deadline first, EDF)和多模板相结合的波位调度方法。首先,在经典修正EDF方法基础上对截止期进行重新定义,并改进任务优先级计算方法;然后,设计了三种波位调度模板;最后,根据任务优先级计算结果,自适应选择调度模板。该方法能够使雷达探测资源在复杂任务场景下得到更加精细的配置,从而最大化发挥其探测效能。     

基于交换式消息调度算法的FlexRay网络优化研究

汽车电子设备水平的提升对车载总线网络提出了很高的要求。而FlexRay网络因为其高速率、可靠性等特点成为了流行的车载通信协议。为满足网络发展的需求,设计了一种基于交换式FlexRay网络的调度算法,提出了一种可以准确计算静态段和动态段最坏情况响应时间的计算方法。通过仿真实验,验证了所提算法的网络传输速率提升了26%,时隙数量减少了44%,总线占用率降低了23%。从而进一步优化了FlexRay网络。     

Quantitative evaluation of multi-process collaborative operation in steelmaking-continuous casting sections

The quantitative evaluation of multi-process collaborative operation is of great significance for the improvement of production plan-ning and scheduling in steelmaking-continuous casting sections (SCCSs). However, this evaluation is difficult since it relies on an in-depth un-derstanding of the operating mechanism of SCCSs, and few existing methods can be used to conduct the evaluation, due to the lack of full-scale consideration of the multiple factors related to the production operation. In this study, three quantitative models were developed, and the multi-process collaborative operation level was evaluated through the laminar-flow operation degree, the process matching degree, and the schedul-ing strategy availability degree. Based on the evaluation models for the laminar-flow operation and process matching levels, this study invest-igated the production status of two steelmaking plants, plants A and B, based on actual production data. The average laminar-flow operation (process matching) degrees of SCCSs were obtained as 0.638 (0.610) and 1.000 (0.759) for plants A and B, respectively, for the period of April to July 2019. Then, a scheduling strategy based on the optimization of the furnace-caster coordinating mode was suggested for plant A. Simu-lation experiments showed higher availability than the greedy-based and manual strategies. After the proposed scheduling strategy was applied, the average process matching degree of the SCCS of plant A increased by 4.6％ for the period of September to November 2019. The multi-pro-cess collaborative operation level was improved with fewer adjustments and interruptions in casting.     

基于多目标的含风电场动态环境经济调度

在倡导大力开发新能源的政策下,含风电场发展迅速。但其出力调度问题很复杂,需要综合经济和环境因素,针对风电功率预测误差大,在研究含风电场动态环境经济调度时,在发电成本中考虑了旋转备用成本,在约束条件中考虑风功率预测误差对旋转备用容量的需求,以发电总成本最小、污染物排放总量最小、购电总费用最小为目标,建立含风电场动态环境经济调度模型。采用非支配排序遗传算法III对模型求解,以获得多样的解集和良好的收敛性。在含有1个风电场的5机电力系统算例中的仿真研究验证了所提出的基于多目标含风电场动态环境经济调度方案的合理性。     

一般作业车间零件排序方法研究

一般作业车间(jobshop)中的零件排序问题是生产作业计划安排与调度中的重要内容之一，业已证明，这类问题属于NP难题，不存在有效的解析解。本文针对一般作业车间的具体情况，考虑到零件在工序间的批移动方式，提出了平行顺序移动方式下以极小化零件生产周期为目标的启发式方法，并设计了相应的计算机程序，它可以方便地进行作业计划安排，对于实际生产作业计划与调度具有重要意义。     

基于概率局域搜索的动车组平日运用计划编制算法

介绍动车组运用计划的含义、计划方案的评价准则;平日运用计划自动编制的启发式算法;算法将问题分为两个部分,即定期检修计划生成和动车组接续运用部分.将接续运用部分转化为某种旅行商问题,定义了动车组运用网络;在构造新的回路时能够考虑日常检修条件和动车组的利用效率.利用实际线路数据进行实验,证明算法有效.     

灰铸铁孕育技术及其机理

本文就目前国内外的常用孕育剂、孕育方法、孕育机理进行了全面介绍.     

The synergistic effect of quaternary ammonium cations on the corrosion inhibition of Fe by inorganic anions

The synergistic effect of tetrabutylammonium cation (TBA⁺) or N-hexadecylpyridinium cation (HDP⁺) and SCN⁻ or I⁻ in 0.5 mol·L⁻¹ H₂SO₄ solution on the corrosion inhibition of Armco iron was investigated by potentiodynamic polarization and polarization resistance measurements. The results show that the synergistic effect of HDP⁺ containing π-electron and anion is stronger than that of TBA⁺ and anion. The joint adsorption models of cation and anion at electrode-solution interface are related to the structure and property of both ions by analyzing the desorption behaviours of both ions when the electrode is polarized anodically. Supported by the national scientific foundation of China Zou Jinyun: born in Aug. 1936. Prof.     

基于Java的分布式测控系统任务调度研究

针对分布式测控系统动态任务调度算法,提出了一种任务迁移的方法。该方法基于Java的对象序列化机制、多线程机制、远程方法调用(remotemethodinvocation,RMI)技术,实现了将重载机上的任务迁移至轻载机上执行。任务迁移的成功使分布式测控系统动态任务调度算法顺利实现,从而有效地提高了系统效率,达到了负载均衡的目标。详细介绍了任务迁移的实现。