Preliminary exploration of the experiments teaching reform on water quality monitoring and evaluation course for preventive medicine majors

水质监测与评价是预防医学专业实验教学的重要组成部分,熟悉并掌握水质监测与评价的方法与流程,对于本专业学生毕业后从事疾病预防控制、卫生监督等工作具有举足轻重的作用。针对目前国内水质监测与评价实验教学中存在的问题,通过增加现场教学环节、拓展实验教学内容以及强化实验教学管理与分析质量控制等改革措施,将实验教学与校园环境监测紧密结合起来,以激发学生学习的积极性和主动性,培养学生独立思考问题、分析问题和解决问题的能力,进而为全面提高实验教学质量进行了有益的探索与尝试。Water quality monitoring and evaluation is an important part of experimental teaching for preventive medicine majors.Familiarizing with and mastering the methods and procedures of water quality monitoring and evaluation is crucial for students engaging in disease prevention and control or health supervision after graduation.Aiming at solving the existing problems in experimental teaching of water quality monitoring and evaluation, a series of reformative measures, including increasing the frequency of field experimental teaching, expanding the contents of experimental teaching, strengthening the management of experimental teaching, and analyzing quality control, were implemented; and experiment teaching was combined with monitoring of the campus environment.These measures aimed to stimulate students' initiative to learn, cultivate students' independent thinking and problem analyzing and solving skills, and therefore provide useful exploration and trials in comprehensively improving the quality of experimental teaching

基于强化学习的能量采集物联网视频编码技术

物联网设备的视频压缩码率和量化参数等编码方案决定着视频质量和物联网设备的使用寿命.针对未知视频传输模型和能量采集模型的物联网设备,提出一种基于强化学习的视频编码方案,能够动态优化视频编码码率和量化参数.该技术根据物联网设备的无线信道带宽、电池水平和采集的能量,结合反馈的视频质量和时延等信息,采用强化学习算法优化选择视频编码码率和量化参数.在动态的网络环境下,物联网设备不需预知视频传输模型就可以综合优化视频质量和设备能量损耗.仿真结果表明,该方案可以提高视频质量,降低设备能量损耗和时延,改善物联网设备效益.国家自然科学基金（61671396）福建省自然科学基金（2019J01843）东南大学移动通信国家重点实验室开放基金（2018D08

多业务传送平台的保护与恢复机制

介绍了同步数字体系（SDH）多业务传送平台（MPTP）中所采用的多种保护和恢复机制。包括SDH自动倒换与恢复、虚级联技术的保护、以太网二层交换的恢复、弹性分组环（RPR）的自动保护以及多协议标签交换（MPLS）的保护和恢复功能等,并对它们的保护和恢复机制的优缺点进行了分析比较