基于数据优先级的物联网任务传输链路调度算法

随着互联网技术的不断提升,物联网使用范围逐渐扩大。在为人们的生活提供便利的同时,也出现相应的数据传输问题。针对传统物联网任务传输链路调度算法为设定网络数据传输顺序,造成物联网数据传输丢包率过高,网络资源利用率较低的问题,设计基于数据优先级的物联网任务传输链路调度算法。构建物联网任务传输链路模型,采用数据优先级技术设定优先条件,完成任务数据等级分化。采用任务优先级划分结果,结合DS-FP算法,并根据原有物联网任务传输链路调度过程,设计任务链路调度器。至此,基于数据优先级的物联网任务传输链路调度算法设计完成。构建算例测试环节,通过与其他两种算法对比可知,此算法可有效解决物联网数据传输丢包率过高,网络资源利用率较低的问题,实现对物联网的高效利用。综上可知,此方法调度能力更佳。

任务驱动教学法在数字电子技术课程中的应用

本文认为,应结合具体工程任务,探索在数字电子技术课程教学中采用任务驱动教学方法。通过任务的设计与实施、评价与拓展等环节培养学生自主学习习惯,开发学生创造思维,锻炼学生动手能力,切实提高教学效果。

单片机系统的分时设计框架

从CPU按“时间片”工作的基本原理出发,阐述了在监测系统中单片机控制采用分时设计的概念和思路。通过一个通用的多路数据采集框图,给出了系统设计的思想方法以及程序的基本流程和模块,并对多路数据在系统中的处理方法作了较详细的说明。

基于可执行架构的杀伤链设计与分析优化方法

考虑到作战体系中杀伤链结构和连接关系的复杂性,提出了基于可执行架构的杀伤链设计与分析优化方法。在设计杀伤链的过程中,首先,基于超网络建模方法构建作战体系网络模型和任务链路网络模型。其次,根据作战回路建模思想对任务链路的节点进行了设计,然后基于可执行架构设计了目标任务链路。在对任务链路进行分析优化时,基于架构方案可执行分析方法提出了逻辑检测分析、关联匹配分析和链路能力分析三个关键部分。最后,将所述设计及分析优化方法与研究案例相结合并对其不足进行了分析。

Research and Design of Monolithic Decision Circuit for Optical Communication System

In this paper,the cause of bit-error is analyzed when data are decided in the optical receiver.A monolithic D-ff decision circuit is designed.It can work effectively at 622 Mb/s.Moreover,a decision method of parallel processing to improve the decision speed is presented,through which the parallel circuit can work up to 1 Gb/s using the same model.With the technique,higher-speed data can be decided by using lower speed device.

Path planning for unmanned aerial vehicles in surveillance tasks under wind fields

The optimal path planning for fixed-wing unmanned aerial vehicles(UAVs) in multi-target surveillance tasks(MTST) in the presence of wind is concerned.To take into account the minimal turning radius of UAVs,the Dubins model is used to approximate the dynamics of UAVs.Based on the assumption,the path planning problem of UAVs in MTST can be formulated as a Dubins traveling salesman problem(DTSP).By considering its prohibitively high computational cost,the Dubins paths under terminal heading relaxation are introduced,which leads to significant reduction of the optimization scale and difficulty of the whole problem.Meanwhile,in view of the impact of wind on UAVs' paths,the notion of virtual target is proposed.The application of the idea successfully converts the Dubins path planning problem from an initial configuration to a target in wind into a problem of finding the minimal root of a transcendental equation.Then,the Dubins tour is derived by using differential evolution(DE) algorithm which employs random-key encoding technique to optimize the visiting sequence of waypoints.Finally,the effectiveness and efficiency of the proposed algorithm are demonstrated through computational experiments.Numerical results exhibit that the proposed algorithm can produce high quality solutions to the problem.

湖州市新闻传媒中心融媒体高清播总控系统建设

文章介绍了湖州市新闻传媒中心建设高清播总控系统的方案选型、架构设计以及技术手段的应用,通过构建信号调度、播出流程管理控制、视音频链路、监看预警等多个子系统,实现了信号的灵活调度,播出业务的安全稳定运行和故障的快速预警。