覆盖是评价视觉传感器网络对感兴趣区域(Field of Interest,FoI)监测质量的重要指标.与传统的全向传感器节点不同,视觉传感器节点的感知区域为扇形区域,其覆盖估计问题也更加复杂.目前,大量视觉传感器网络的研究工作主要假设同构节点随...
详细信息
覆盖是评价视觉传感器网络对感兴趣区域(Field of Interest,FoI)监测质量的重要指标.与传统的全向传感器节点不同,视觉传感器节点的感知区域为扇形区域,其覆盖估计问题也更加复杂.目前,大量视觉传感器网络的研究工作主要假设同构节点随机部署在感兴趣区域内以对其实现覆盖.该文假设所有节点随机部署在感兴趣区域的外部边界以对FoI实现覆盖监测,同时研究异构部署的k-覆盖率估计问题.针对此应用场景,该文首次提出k-覆盖率估计模型,通过仿真对场景k-覆盖率,仿真值及模型理论值进行比较分析,结果表明模型理论值与场景仿真值的平均绝对覆盖误差基本保持在6%以内.该文的研究对边界部署的视觉传感器网络具有重要的指导意义.
The basic concepts and advantages of more/all electric aircraft （M/AEA） are briefly addressed. The combined starter/generator （CS/G） system is introduced as a key technology to enable M/AEA. Some important perform...
详细信息
The basic concepts and advantages of more/all electric aircraft （M/AEA） are briefly addressed. The combined starter/generator （CS/G） system is introduced as a key technology to enable M/AEA. Some important performance requirements for CS/G system are obtained. Based on these requirements, a high speed switched reluctance machine （SRM） is designed to operate as a starter/generator. The entire design process is mainly divided into two stages： electromagnetic design and thermal design. In electromagnetic design stage, the electromagnetic structure and dimensions of the machine and the number of phase winding turns per pole are obtained; the topology and main technical details of the converter are briefly introduced as well. In thermal design stage, a liquid-cooling system is designed based on the thermal analysis of the machine. In the end, the performances of the designed SRM are basically verified by simulation. To get high performances, the exciting angles are optimized in two different operating modes respectively, and the optimized performances in the motoring mode are given as well.
暂无评论