We propose an analytical model to evaluate the lightpath blocking performance for a single ROADM node with intra-node add/drop contention,in which the number of lightpaths that can be added/dropped with the same wavel...We propose an analytical model to evaluate the lightpath blocking performance for a single ROADM node with intra-node add/drop contention,in which the number of lightpaths that can be added/dropped with the same wavelength is limited by the add/drop contention factor.Different models of traffic load per nodal degree are considered to validate the effectiveness of the analytical model.The simulation results show that the proposed analytical model is effective in predicting the performance for different values of add/drop contention factor C and for variable offered loads at the node.The add/drop contention factor shows an important impact on the lightpath blocking performance and properly raising the contention factor can significantly improve the lightpath blocking performance.When the add/drop contention factor C exceeds a certain level,the performance of a ROADM with intra-node contention is close to that of a contentionless ROADM.展开更多
利用无源车辆ISD(inerter spring damper)悬架系统可有效抑制车身低频振动的特性,结合经典加速度驱动阻尼(acceleration driven damping,ADD)控制可抑制车身中高频振动的特点,提出基于ADD正实网络的车辆ISD悬架综合优化设计方法,将车辆...利用无源车辆ISD(inerter spring damper)悬架系统可有效抑制车身低频振动的特性,结合经典加速度驱动阻尼(acceleration driven damping,ADD)控制可抑制车身中高频振动的特点,提出基于ADD正实网络的车辆ISD悬架综合优化设计方法,将车辆ISD悬架的宽频域振动抑制问题转化为基于ADD网络综合的正实优化控制问题。分别构建一阶和二阶正实网络的悬架动态模型,基于鱼群算法优化悬架结构参数,仿真分析ADD控制与正实网络的耦合作用机理和正实网络阶次对悬架性能的影响。结果表明:悬架的隔振性能随正实网络阶次的升高而提升,ADD网络综合的方法可以有效的实现车辆ISD悬架的宽频域的振动抑制,进一步拓展车辆ISD悬架主动控制的思路。展开更多
目的 系统评价ADD1基因Gly460Trp多态性与原发性高血压发病风险的相关性。方法 查计算机检索PubMed、Embase、CBM、VIP、Wanfang Data和CNKI，查找关于ADD1基因Gly460Trp多态性与原发性高血压发病相关性的病例对照研究，检索时限均为各...目的 系统评价ADD1基因Gly460Trp多态性与原发性高血压发病风险的相关性。方法 查计算机检索PubMed、Embase、CBM、VIP、Wanfang Data和CNKI，查找关于ADD1基因Gly460Trp多态性与原发性高血压发病相关性的病例对照研究，检索时限均为各数据库建库至2015年8月。由两名评价员同时进行文献筛选及资料提取，采用Stata 12.0软件进行Meta分析。结果 共纳入文献43篇，包括12 309例原发性高血压患者，13 833例对照。Meta分析结果显示，ADD1基因Gly460Trp多态性与原发性高血压之间的相关性在等位基因模型（T vs. G：OR=1.10，95%CI：1.03～1.17）、显性基因模型（TT+GT vs. GG：OR=1.10，95%CI：1.00～1.20)、隐性基因模型（TT vs. GG+GT：OR=1.17，95%CI：1.07～1.29）和纯合子模型（TT vs. GG：OR=1.20，95%CI：1.06～1.35）中有统计学意义，尤其是在亚洲人群中。结论 本Meta分析表明，ADD1基因Gly460Trp位点多态性与原发性高血压发病风险有相关性，尤其是亚洲人群。展开更多
基金jointly supported by the National 863 Plans Project of China (2012AA050801)National Natural Science Foundation of China(NSFC)(61172057,61322109)+1 种基金Natural Science Foundation of Jiangsu Province(BK20130003)Science and Technology Support Plan of Jiangsu Province(BE2014855)
文摘We propose an analytical model to evaluate the lightpath blocking performance for a single ROADM node with intra-node add/drop contention,in which the number of lightpaths that can be added/dropped with the same wavelength is limited by the add/drop contention factor.Different models of traffic load per nodal degree are considered to validate the effectiveness of the analytical model.The simulation results show that the proposed analytical model is effective in predicting the performance for different values of add/drop contention factor C and for variable offered loads at the node.The add/drop contention factor shows an important impact on the lightpath blocking performance and properly raising the contention factor can significantly improve the lightpath blocking performance.When the add/drop contention factor C exceeds a certain level,the performance of a ROADM with intra-node contention is close to that of a contentionless ROADM.
文摘利用无源车辆ISD(inerter spring damper)悬架系统可有效抑制车身低频振动的特性,结合经典加速度驱动阻尼(acceleration driven damping,ADD)控制可抑制车身中高频振动的特点,提出基于ADD正实网络的车辆ISD悬架综合优化设计方法,将车辆ISD悬架的宽频域振动抑制问题转化为基于ADD网络综合的正实优化控制问题。分别构建一阶和二阶正实网络的悬架动态模型,基于鱼群算法优化悬架结构参数,仿真分析ADD控制与正实网络的耦合作用机理和正实网络阶次对悬架性能的影响。结果表明:悬架的隔振性能随正实网络阶次的升高而提升,ADD网络综合的方法可以有效的实现车辆ISD悬架的宽频域的振动抑制,进一步拓展车辆ISD悬架主动控制的思路。
文摘目的 系统评价ADD1基因Gly460Trp多态性与原发性高血压发病风险的相关性。方法 查计算机检索PubMed、Embase、CBM、VIP、Wanfang Data和CNKI，查找关于ADD1基因Gly460Trp多态性与原发性高血压发病相关性的病例对照研究，检索时限均为各数据库建库至2015年8月。由两名评价员同时进行文献筛选及资料提取，采用Stata 12.0软件进行Meta分析。结果 共纳入文献43篇，包括12 309例原发性高血压患者，13 833例对照。Meta分析结果显示，ADD1基因Gly460Trp多态性与原发性高血压之间的相关性在等位基因模型（T vs. G：OR=1.10，95%CI：1.03～1.17）、显性基因模型（TT+GT vs. GG：OR=1.10，95%CI：1.00～1.20)、隐性基因模型（TT vs. GG+GT：OR=1.17，95%CI：1.07～1.29）和纯合子模型（TT vs. GG：OR=1.20，95%CI：1.06～1.35）中有统计学意义，尤其是在亚洲人群中。结论 本Meta分析表明，ADD1基因Gly460Trp位点多态性与原发性高血压发病风险有相关性，尤其是亚洲人群。
