期刊文献+
共找到6篇文章
< 1 >
每页显示 20 50 100
基于源流链的多源点配电网拓扑新算法 被引量:1
1
作者 屈志坚 刘明光 +3 位作者 陈秋琳 杨罡 张纪伟 刘铁 《电力系统自动化》 EI CSCD 北大核心 2009年第9期61-66,共6页
针对配电网主接线的远动实时监控提出了一种网络拓扑新算法。对多电源点配电网中源流线路进行了描述,然后根据应用对象,即配电网络拓扑图,定义了源流链及其属性,并进行了分类,采用单向追踪、双向同步追踪和多向同时追踪逐步深入的策略,... 针对配电网主接线的远动实时监控提出了一种网络拓扑新算法。对多电源点配电网中源流线路进行了描述,然后根据应用对象,即配电网络拓扑图,定义了源流链及其属性,并进行了分类,采用单向追踪、双向同步追踪和多向同时追踪逐步深入的策略,对源流链追踪算法进行原理剖析。在源流链的方向性和运动性的基础上,构造出链式数据及其属性域模型。在算法实现上,综合运用分段式追踪和检查点等方法,在铁路电力远动系统中进行了工程应用。 展开更多
关键词 网络拓扑分析 源流链 同步追踪 检查点
下载PDF
基于源流路径链和输电介数的电网关键线路辨识 被引量:17
2
作者 张富超 谢成荣 +3 位作者 沈立新 张富春 黄家栋 刘金龙 《电力系统保护与控制》 EI CSCD 北大核心 2015年第21期7-12,共6页
快速、准确和全面地辨识关键线路对预防连锁故障、保障电网安全稳定运行具有重要意义。提出一种基于源流路径链和输电介数的电网关键线路辨识方法,该方法首先建立电网有向加权拓扑模型,然后基于源流路径链生成算法,搜索源流节点对间的... 快速、准确和全面地辨识关键线路对预防连锁故障、保障电网安全稳定运行具有重要意义。提出一种基于源流路径链和输电介数的电网关键线路辨识方法,该方法首先建立电网有向加权拓扑模型,然后基于源流路径链生成算法,搜索源流节点对间的所有潮流传输路径。根据输电介数的定义,计算各线路的输电介数并排序,按照排序结果辨识电网关键线路。最后,通过对IEEE39节点的算例测试,验证了所提算法的有效性和准确性。 展开更多
关键词 源流路径 输电介数 关键线路 连锁故障 功率传输分布因子
下载PDF
电力网络拓扑分析与源流路径链生成算法 被引量:7
3
作者 陈彬 于继来 《电力系统及其自动化学报》 CSCD 北大核心 2012年第1期25-31,共7页
为快速、准确和全面地求取电力网络源流路径链,提出了一种新型的网络拓扑分析与源流路径链生成算法。该算法首先根据电网某一拓扑结构及其潮流状态形成有向图和送端节点-送电支路邻接表,然后进行两轮拓扑分析,快速生成源流路径树,并由... 为快速、准确和全面地求取电力网络源流路径链,提出了一种新型的网络拓扑分析与源流路径链生成算法。该算法首先根据电网某一拓扑结构及其潮流状态形成有向图和送端节点-送电支路邻接表,然后进行两轮拓扑分析,快速生成源流路径树,并由此获取相关的源流路径链。此算法无需通过基于图论邻接终点矩阵的复杂运算,简便快捷。此外,该算法可用于求解电力网络发生局部拓扑和局部潮流流向变化后的路径链局部修改问题。 展开更多
关键词 电力网络 拓扑分析 有向图 源流路径
下载PDF
电力网络源流路径链的双向电气剖分算法 被引量:6
4
作者 陈彬 于继来 《电力系统自动化》 EI CSCD 北大核心 2011年第18期41-46,共6页
为求解电力网络源流之间的电气供求信息,在分析现有基于电力网络源流路径链的联合电气剖分关系的基础上,提出了分支电气剖分关系及基于这2种关系的双向电气剖分算法,以适应求解不同类型的电气剖分问题。算法应用联合电气剖分关系对全网... 为求解电力网络源流之间的电气供求信息,在分析现有基于电力网络源流路径链的联合电气剖分关系的基础上,提出了分支电气剖分关系及基于这2种关系的双向电气剖分算法,以适应求解不同类型的电气剖分问题。算法应用联合电气剖分关系对全网源流路径链进行正向过程剖分,再应用分支电气剖分关系进行反向过程剖分,从而得到各路径链彻底的电气剖分参数。算例及其校验结果证明了算法的正确性。 展开更多
关键词 电力网络 源流路径 电气剖分 双向剖分
下载PDF
Research on logistics management system based on supply chain management
5
作者 Yi Shi 《International Journal of Technology Management》 2013年第6期71-74,共4页
Generally, supply chain logistics is the unification of logistics, information flow and capital flow, logistics runs through the whole process of the supply chain. Logistics connects the individual enterprise in the s... Generally, supply chain logistics is the unification of logistics, information flow and capital flow, logistics runs through the whole process of the supply chain. Logistics connects the individual enterprise in the supply chain and it is the bond of mutual cooperation between enterprises. In that way, the logistics management becomes an important part of the supply chain management system naturally. However, it is not so long since the theory of supply chain management and logistics management put forward so they are still being refined. Besides, it is lack of green philosophy in the logistics management of the supply chain and effect of logistics on the environment and resource efficiency do not be considered synthetically. Yet, methods to solve the problem that customers return items and waste materials have been excluded from the enterprises and business strategy. With the awareness that people should protect the environment and conserve resources enhanced and governments increase the intensity of environmental regulations constraints, the theory and practice of green logistics management are valued by the foreign supply chain management and logistics management theory community and the business community gradually. 展开更多
关键词 logistics management system supply chain management product manufacturing.
下载PDF
Environmental connections of novel avian-origin H7N9 influenza virus infection and virus adaptation to the human 被引量:33
6
作者 LI Jun YU XinFen +10 位作者 PU XiaoYing XIE Li SUN YongXiang XIAO HaiXia WANG FenJuan DIN Hua WU Ying LIU Di ZHAO GuoQiu LIU Jun PAN JingCao 《Science China(Life Sciences)》 SCIE CAS 2013年第6期485-492,共8页
A novel H7N9 influenza A virus has been discovered as the causative identity of the emerging acute respiratory infection cases in Shanghai,China.This virus has also been identified in cases of infection in the neighbo... A novel H7N9 influenza A virus has been discovered as the causative identity of the emerging acute respiratory infection cases in Shanghai,China.This virus has also been identified in cases of infection in the neighboring area Hangzhou City in Zhejiang Province.In this study,epidemiologic,clinical,and virological data from three patients in Hangzhou who were confirmed to be infected by the novel H7N9 influenza A virus were collected and analyzed.Human respiratory specimens and chicken feces from a contacted free market were tested for influenza virus by real-time reverse transcription PCR(RT-PCR) and sequencing.The clinical features of the three cases were similar featured with high fever and severe respiratory symptoms;however,only one of the patients died.A certain degree of diversity was observed among the three Hangzhou viruses sequenced from human samples compared with other reported H7N9 influenza A viruses.The sequences of the novel avian-origin H7N9 influenza viruses from Hangzhou City contained important amino acid substitutions related to human adaptation.One of the Hangzhou viruses had gained a novel amino acid substitution(Q226I) in the receptor binding region of hemagglutinin.More importantly,the virus sequenced from the chicken feces had a 627E substitution in the PB2 protein instead of the mammalian-adapted 627K substitution that was found in the PB2 proteins from the Hangzhou viruses from the three patients.Therefore,the newly-emerging H7N9 virus might be under adaptation pressure that will help it "jump" from avian to human hosts.The significance of these substitutions needs further exploration,with both laboratory experiments and extensive field surveillance. 展开更多
关键词 H7N9 influenza A virus human adaptation EPIDEMIOLOGY SUBSTITUTION
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部