南极Dome A地区低温低压环境下智能照明控制技术探索

南极内陆Dome A地区极端恶劣的环境对科考人员的生理极限及作业效率构成了严峻挑战,而无人观测站可突破人类生理限制,持续高效工作,其关键运维技术,包括智能照明控制技术等越发受到各国重视。本文在总结Dome A地区遥远、低温、极夜、白化天等不利影响因素的基础上,探索适应该区域极端环境、满足科考人员工作需求、便于远程及现场操作的智能照明系统运维模式,进行满足极昼极夜环境下无人观测站室内监测及维护需求的智能照明适宜技术选型。通过对铱星传输模块、Wi-Fi无线网关等子系统的组合,提出可耐受Dome A地区低温低压环境的现场照明监控设备控制方案,对南极无人站区的建设及相关智能照明控制技术的发展具有指导意义。

Interference Robust Channel Hopping Strategies for Wireless Sensor Networks

Due to the shared nature of the wireless medium, the performance of wireless sensor network is often limited by both internal interference and external interference. The internal interference is that simultaneous traffic activity by neighboring nodes in the same network, while the external interference is from wireless transmissions by other types of devices, such as Wi-Fi and Bluetooth nodes. In this paper, we present two channel hopping algorithms for multichannel, single-radio wireless sensor networks. The first algorithm achieves collision-free transmission environment while do not introduce extra control overhead. The second algorithm, in addition to reducing internal interference effects, reduces the external interference effects from Wi-Fi devices. Simulation results show that both of them significantly improve performance in wireless sensor network.

购物中心网络建设研究

针对购物中心网络系统在设计及建设过程中出现的设计与使用脱节、设计落地性差等问题进行剖析,提出购物中心应该建设的四套网络,并提出三种组网方案。同时分析了这三种方案的成本造价、建设难度、管理方式及适用场景,力求在设计阶段就能选择适合项目的网络设计方案。