当前,电力通信网存在大量恒定比特率(constant bit rate,CBR)业务,在同步数字体系(synchronous digital hierarchy,SDH)/多业务传送平台(multi-service transfer platform,MSTP)等传统网络设备面临退网、承载网络技术急需升级演进的背景...当前,电力通信网存在大量恒定比特率(constant bit rate,CBR)业务,在同步数字体系(synchronous digital hierarchy,SDH)/多业务传送平台(multi-service transfer platform,MSTP)等传统网络设备面临退网、承载网络技术急需升级演进的背景下,需要解决新技术路线下电力CBR业务的承载和管控问题。文章介绍了基于城域传送网(metro transport network,MTN)小颗粒通道技术的CBR业务承载转发面技术方案,在此基础上,提出面向电力CBR业务承载的新型“集中式SDN+分布式管控”模型架构,针对电力CBR业务的高时延稳定性需求,对CBR业务处理及通道路径分配机制进行优化,基于此优化方法进行了通道路径最优规划的仿真设计,结果表明提出的管控模型架构和方法能优化CBR业务的处理和路径计算效果,具备较好的扩展性。展开更多
The fully-leaky guided wave technique has been used to study the reflective 90? MTN liquid crystal cell used for LCOS. The cell is comprised of upper substrate with indium-tin-oxide coating and lower substrate with al...The fully-leaky guided wave technique has been used to study the reflective 90? MTN liquid crystal cell used for LCOS. The cell is comprised of upper substrate with indium-tin-oxide coating and lower substrate with aluminum coating. Reflective angle-dependent signals (Rss, Rpp, Rsp and Rps) were recorded over a range of angles of incidence with the cell under application of 0 - 7 Vrms ac electric fields. From the recorded experimental data, we found the reflective signals are quite strong, especially the polarization conversion signals. Fitting the data in reflection with the results of the modeling-program gives the information about the pre-tilt and twist of the director as well as the parameters of different optical layers. We found that the pre-tilt angle on the upper substrate is different from that on the bottom in the best fits, which suggests that the indium-tin-oxide and the aluminum coatings have different effects on the alignment layers.展开更多
文摘当前,电力通信网存在大量恒定比特率(constant bit rate,CBR)业务,在同步数字体系(synchronous digital hierarchy,SDH)/多业务传送平台(multi-service transfer platform,MSTP)等传统网络设备面临退网、承载网络技术急需升级演进的背景下,需要解决新技术路线下电力CBR业务的承载和管控问题。文章介绍了基于城域传送网(metro transport network,MTN)小颗粒通道技术的CBR业务承载转发面技术方案,在此基础上,提出面向电力CBR业务承载的新型“集中式SDN+分布式管控”模型架构,针对电力CBR业务的高时延稳定性需求,对CBR业务处理及通道路径分配机制进行优化,基于此优化方法进行了通道路径最优规划的仿真设计,结果表明提出的管控模型架构和方法能优化CBR业务的处理和路径计算效果,具备较好的扩展性。
文摘The fully-leaky guided wave technique has been used to study the reflective 90? MTN liquid crystal cell used for LCOS. The cell is comprised of upper substrate with indium-tin-oxide coating and lower substrate with aluminum coating. Reflective angle-dependent signals (Rss, Rpp, Rsp and Rps) were recorded over a range of angles of incidence with the cell under application of 0 - 7 Vrms ac electric fields. From the recorded experimental data, we found the reflective signals are quite strong, especially the polarization conversion signals. Fitting the data in reflection with the results of the modeling-program gives the information about the pre-tilt and twist of the director as well as the parameters of different optical layers. We found that the pre-tilt angle on the upper substrate is different from that on the bottom in the best fits, which suggests that the indium-tin-oxide and the aluminum coatings have different effects on the alignment layers.
