1) HFC network
HFC 网络
1.
With the development of HFC broad band technology and the progress of HFC network, it is quite necessarily to manage the HFC networks and its elements.
随着HFC 接入技术的发展和HFC 网络建设的推进,迫切需要对HFC 网络进行管理。
2.
It s critical for CATV network operator to enhance its core competitiveness by giving full play to the huge potential of HFC networks.
如何充分发挥现有 HFC 网络的潜力,提升在未来“三网融合”中的竞争力,对今后有线网络公司的发展至关重要。
2) HFC network
HFC网络
1.
Thw study of HFC network and its access system;
HFC网络及其接入系统的研究
2.
A QoS solution for CM in HFC network;
一种适用于HFC网络CM的QoS解决方案
3.
How to Deal with the Problem of Power cut on HFC Network;
HFC网络应对停电的几种方案
3) HFC networks
HFC网络
1.
Firstly, this paper proposes an algorithm which can calculate accurately the total amount of mini-slots requested in the bandwidth request frame, based on HFC networks and DOCSIS specifications.
首先提出了一种基于HFC网络和DOCSIS规范精确计算带宽请求微时隙的算法,该算法根据用户数据长度、MAC管理报文的大小计算出不同RF(射频)条件下发送上行数据所需要的最少微时隙数,有效提高了网络带宽利用率。
2.
Discussed the designing method and steps of HFC networks according to the practice of the designing in Anqing CATV networks, put forward a new concept in CATV networks designing systematically, scientifically and reasonably.
结合安庆市有线电视网络设计实践 ,探讨HFC网络设计的方法和步骤 ,提出有线电视网络设计的系统化、科学化、合理化的概念。
3.
Aiming that astral-type central allocation in bi-directional HFC networks is not worth utilizing conventional HFC network frameworks, we propose, in this paper, the method of ATM based on bi-directional HFC networks.
本文针对双向HFC网络中存在上行噪声的汇聚和积累及上行信道总线冲突的技术难题，在上下行数据传输的工作体制方面，提出了基于ATM传输技术在双向HFC网络上实现CBR、VBR具体技术的方法，以此实现网络中的各种业务。
4) HFC network
HFC网
1.
Model selection testing of CM system and its application in the HFC network of Nanjing Station;
CM系统选型测试及在南京台HFC网络上的应用
2.
Characteristics and suppression of return path noise in HFC network;
HFC网回传路径的噪声特性及抑制方法
3.
Implementation of video transmission techniques in VOD system based on HFC network;
HFC网VOD系统视频传输技术实现
5) HFC net
HFC网
1.
This paper also discusses the application of EPON access technology in HFC network,tri.
针对有线电视网络面临的形势和现状,对目前采用的几种接入网技术进行分析,阐述有线电视网络改造的新思路和技术选择,EPON接入技术被认为是当前广电比较理想的接入模式之一,介绍EPON的工作原理,分析EPON技术优势,比较EPON与HFC,探讨了EPON在HFC网中的应用,试图从中找出广播电视双向网络技术改造的方案与未来双向网技术的发展方向,希望EPON在我国有更好的发展,真正为广大用户服务。
2.
In order to resolve the problems of mass noise caused by up links in HFC net, it is the key that equipments should be operated in a high CNR value and that no distortion produced.
解决HFC网上行链路汇聚噪声问题的关键是使设备都工作在较高的CNR值而又不产生失真。
3.
In the application of network digitalization of HFC and WB nowadays,how to construct an excellent HFC network and guarantee to develop the various business is a primary task for every network businessman.
在HFC网络数字化、宽带应用的今天 ,如何建设一个优质的HFC网、保障各项业务的开展是每一个网络运营商的首要任务。
6) HFC
HFC网
1.
Discussion on a New Method for the Evaluation of RF Performance of Two-way HFC Network;
一种双向HFC网射频指标评价新方法的探讨
2.
High speed data broadcasting system for HFC network based on IP /DVB-C;
基于IP/DVB-C的HFC网高速数据广播系统
补充资料：Freon-152a，HFC-152a
分子式：CH3CHF2
CAS号：
性质：又称氟里昂-152a。常温常压下为无色气体，有乙醚味。沸点-24.7℃。凝固点-117℃。液体密度pL200.95g/cm3。折射率nD-721.3011。临界温度113.5℃，临界压力44.4×105Pa，临界密度0.365g/cm3。溶于有机溶剂，微溶于水，有麻醉神经作用。易燃、低毒。由偏氯乙烯与无水氟化氢反应或干燥乙炔和氟化氢在氟磺酸催化下加成反应制得。用作制冷剂(替代CFC-12)和其他制冷剂中间体、喷雾剂、发泡剂，还用作氟橡胶原料。
CAS号：
性质：又称氟里昂-152a。常温常压下为无色气体，有乙醚味。沸点-24.7℃。凝固点-117℃。液体密度pL200.95g/cm3。折射率nD-721.3011。临界温度113.5℃，临界压力44.4×105Pa，临界密度0.365g/cm3。溶于有机溶剂，微溶于水，有麻醉神经作用。易燃、低毒。由偏氯乙烯与无水氟化氢反应或干燥乙炔和氟化氢在氟磺酸催化下加成反应制得。用作制冷剂(替代CFC-12)和其他制冷剂中间体、喷雾剂、发泡剂，还用作氟橡胶原料。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条