期刊文献+
共找到6篇文章
< 1 >
每页显示 20 50 100
面向Trunk技术的网络拓扑发现算法研究 被引量:5
1
作者 李丹程 马东琳 +1 位作者 韩春燕 刘益先 《小型微型计算机系统》 CSCD 北大核心 2012年第11期2435-2441,共7页
随着企业组网模式的大型化、复杂化及VLAN技术在交换层网络中的广泛应用,当前交换层拓扑发现算法在拓扑发现效率及普适性上存在诸多问题,本文分析Trunk技术特点,提出一种结合地址转发表与Trunk信息的网络拓扑发现算法,该算法提高了网络... 随着企业组网模式的大型化、复杂化及VLAN技术在交换层网络中的广泛应用,当前交换层拓扑发现算法在拓扑发现效率及普适性上存在诸多问题,本文分析Trunk技术特点,提出一种结合地址转发表与Trunk信息的网络拓扑发现算法,该算法提高了网络拓扑发现算法运行效率及发现结果准确性,此外,算法对多厂商数据进行分析使其对当前主流的多VLAN交换网络拓扑有着更强的适应性并能够准确给出网络逻辑拓扑连接关系,同时,给出了算法的实现方法及园区网测试的结果. 展开更多
关键词 trunk 二层网络拓扑发现 地址转发表 计算机网络 VLAN
在线阅读 下载PDF
Trunk和VLAN技术在大型校园网中的综合运用 被引量:12
2
作者 黄世权 《安徽大学学报(自然科学版)》 CAS 北大核心 2006年第2期30-32,共3页
Trunk和V lan不仅可以提高网络运行的性能和效率,而且有利于网络安全、管理、升级和扩容,解决许多其他问题[1].根据多校区校园网建设和管理中的应用需求,充分发挥三层交换机的性能,采用Trunk和VLAN技术实施多校区网络建设的解决方案.并... Trunk和V lan不仅可以提高网络运行的性能和效率,而且有利于网络安全、管理、升级和扩容,解决许多其他问题[1].根据多校区校园网建设和管理中的应用需求,充分发挥三层交换机的性能,采用Trunk和VLAN技术实施多校区网络建设的解决方案.并通过网络建设实例介绍Trunk和VLAN技术在校园网管理中的构建、应用和配置策略. 展开更多
关键词 多校区 校园网 trunk VLAN 运用
在线阅读 下载PDF
宽带接入交换机中Trunking的设计与实现 被引量:4
3
作者 田妍 王中 付立政 《小型微型计算机系统》 CSCD 北大核心 2002年第11期1317-1320,共4页
Trunking是将多个物理链路聚集成一个逻辑链路从而增加网络带宽 ,增强网络稳定性的技术 .本文首先介绍了 Trunking的工作原理 ,然后提出了宽带接入交换机上 Trunking的设计方案 ,并详细阐述了具体实现过程 .本文还提出了一个基于 Trunk... Trunking是将多个物理链路聚集成一个逻辑链路从而增加网络带宽 ,增强网络稳定性的技术 .本文首先介绍了 Trunking的工作原理 ,然后提出了宽带接入交换机上 Trunking的设计方案 ,并详细阐述了具体实现过程 .本文还提出了一个基于 Trunking的流量均衡算法并对此算法的性能进行了测试 . 展开更多
关键词 宽带接入 交换机 trunking 设计 链路聚集 流量均衡 网络稳定性 工作原理
在线阅读 下载PDF
IEEE 802 1Q VLAN原理实验的设计与实现 被引量:12
4
作者 刘向东 李志洁 +1 位作者 焉德军 王德高 《实验室研究与探索》 CAS 北大核心 2011年第4期46-48,77,共4页
VLAN原理实验利用协议分析方法,测试验证VLAN实现的功能,以及交换机不同属性端口接收、转发普通帧和标记帧的特性,观察支持VLAN的交换机对以太帧插入、删除802.1Q标记的过程。并通过错误配置交换机端口属性,演示交换机加、去标记失配导... VLAN原理实验利用协议分析方法,测试验证VLAN实现的功能,以及交换机不同属性端口接收、转发普通帧和标记帧的特性,观察支持VLAN的交换机对以太帧插入、删除802.1Q标记的过程。并通过错误配置交换机端口属性,演示交换机加、去标记失配导致的网络故障,以加深学生对IEEE 802.1Q VLAN原理的理解。 展开更多
关键词 交换机 IEEE 802.1Q 虚拟局域网 trunk 标记
在线阅读 下载PDF
冠状动脉内支架在复杂冠脉病变中的应用
5
作者 崔连群 陈良华 《介入放射学杂志》 CSCD 2003年第S1期32-35,共4页
Objective To study the clinical value of coronary stenting in treatment of severe complex coronary artery lesions, to evaluate the short and long term outcome of the patients imployed coronary stents, and to well reco... Objective To study the clinical value of coronary stenting in treatment of severe complex coronary artery lesions, to evaluate the short and long term outcome of the patients imployed coronary stents, and to well recognize the role of stenting in dealing with the complications of PTCA.Methods In this study, two hundrad sixty four patients with coronary artery disease were included, who were classified as PTCA group (138 cases)and coronary stented group(126 cases).They all received Exercise Test(ET)、Ultrasound Cardiogram(UCG)and Ambulatory Electrocardiography (AECG)at admission and before discharge, respectively. The coronary artery lesions were categorized into type A.B.C according to the methods reported by ACC/AHA . It was that the data between two groups including clinical information, cronary artery lesion characteristicis, procedural success rate, major complications, Minimum Lumen Diameter (MLD),residual stenosis, collateral circulation scores both before and after procedure had been compared. Following up were performed 6 months to 3 years after procedure. Results The study showed that there were no significant different in two groups including the clinical information, positive rate of ET, EF, results of AECG. But the rate of type B2/C lesions were higher in CS group than that in PTCA group( P <0.05). Both PTCA Group and CS Group had extremely success rate in type A and type B1, but CS had a higher success rate than that in PTCA in type B2 and type C (94.28%VS 89.2%, P <0.05). CS group had a lower rate of complication in procedure than that of PTCA group. There are no signifiance in MLD between the two groups (0.53± 0.22)mm vs (0.42±0.26)mm,( P >0.05) before procedure. But MLD was signifantly higher in CS group than that in PTCA group (2.51±0.66)mm vs (3.08±0.66)mm,( P <0.001) after procedure.The collateral circulation scrores were signifantly decreased after procedure (1.7±0.6) vs (0.8±0.4); (2.1±0.3) vs (0.3±0.4) in both PTCA Group and PTCA Group respectivesly,( P <0.001). Residual stenosis were higher in PTCA group(15±6%)than that in CS group (6±3%, P <0.001). The positive rate of ET, exercise capacity, ST depressions, EF and wall motion were all improved significantly both in PTCA group and CS group, CS group has a higher effect in exercise capacity, MLD, EF and ischemia duration.Seventy nine patients were followed up and the rate of cardiac events in the CS group were lower than in PTCA group.Conclusions 1.Coronary stenting had a high success rate and low complication in treatment of severe and complex coronary artery lesions.2.Coronary stentig reduced residual stenosis, improved blood supply, salvaged the hibernating and /or stunned myocardium, improved the left ventricular function. CS have offered a new, safe and effective metbods for treatment of left main trunk lesions; 3.Coronary stenting has broden the indication for invasive treatment of coronary artery diseases. 展开更多
关键词 Coronary artery Left main trunk Endostenting Coronary complex lesions
在线阅读 下载PDF
American Family Physician2014年9月目次选登
6
作者 本刊编辑部 《中国全科医学》 CAS CSCD 北大核心 2014年第29期3429-3429,共1页
September 1,2014 ·A Comprehensive Newborn Exam:Part I.General,Head and Neck,Cardiopulmonary新生儿综合检查:第一部分。一般检查、头颈、心肺 ·A Comprehensive Newborn Exam:Part II.Skin,Trunk,Extremities,Neur... September 1,2014 ·A Comprehensive Newborn Exam:Part I.General,Head and Neck,Cardiopulmonary新生儿综合检查:第一部分。一般检查、头颈、心肺 ·A Comprehensive Newborn Exam:Part II.Skin,Trunk,Extremities,Neurologic新生儿综合检查:第二部分。皮肤、躯体、四肢、神经系统 ·ACE Inhibitors Decrease Cardiovascular Events in Patients with Diabetes,ARBs Do Not血管紧张素转换酶抑制剂可降低糖尿病患者心血管事件,而血管紧张素受体阻断剂则不行 ·Accuracy of Fecal DNA and Fecal Immunochemical Test for Colorectal Cancer Detection粪便DNA及粪便免疫化学试验检测结直肠癌的准确性。 展开更多
关键词 PHYSICIAN trunk 结直肠癌 血管紧张素 心血管事件 化学试验 FAMILY Events 受体阻断剂 Skin
在线阅读 下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部