With the massive development of information , the input - queued switches , which is easier to realize , are more preferable than the output - queued ones in the b - isdn 随着网络的宽带化和综合化,人们在atm交换结构的设计上越来越倾向于易于硬件实现的输入排队交换结构。
With the development of society and technology , people ' s demand on broad band services , such as vod , visual telephone and internet , are is increasing constantly 随着社会的进步和技术的飞速发展,人们对视频点播、可视电话、互联网等宽带业务的需求不断增大。这使得通信网络的宽带化成为必然。
With the fast development of technology of communication and the rapid popularization of internet , the trend of broadband , integrating , personality become to appear in network service 随着通信技术的快速发展和互联网的迅速普及,为适应人们的需要,网络业务逐步呈现出宽带化、综合化、多样化和个性化的趋势。
Some novel electrically small antennas and wide band antennas such as hybrid loaded monopole , open - circuited transmission line loaded antenna and wire - taper antenna are designed according to these effective technologies found before 设计了混合加载线天线、顶部套筒电小天线、线锥天线等几种新型的小型化天线和宽带化天线结构。
In the world , the developing of 3g is not balanced . some zones are prosperous , others are not . the situation of japan and korea is exciting , while europe is on the contrary 而且随着生活水平的不断提高,人们对通信的需求也不仅限于语音业务,移动化、宽带化,成为下一代通信技术的发展方向,其中3g移动通信是这一领域中炙手可热的话题。
The trend that china ' s multimedia networks is developing to wide band and ip centered can not deny the fact that narrow band environment and operations in it will exist for a long time 中国通信网宽带化和ip化的趋势,带来了多媒体通信业务的不断膨胀。然而,不可否认的是,一段时间内,窄带必将和宽带化的进程并进,窄带业务仍然有着广泛需求。
At this background , the miniature and wide band technology of antenna become more and more important . this dissertation mainly researches the ultra - wide band communication antennas and electrically small antennas 本论文研究的主要内容是天线的宽带化和小型化技术,对超宽带电小天线的分析方法、宽带化、小型化等关键技术以及实际天线的研制等方面进行了一些探索。
Then , lump loading is used to enhance the valid height of the antennas , as a result the input impedance of the monopole antenna undergoes gently variation with frequency , and consequently it is easy to match by wideband matching network 加载后,输入阻抗变化得到减缓,这是能够使用宽带匹配网络进行宽带匹配的前提,经过宽带匹配达到了天线小型化和宽带化的设计目的。
The optimization of poan contains two problems : one is how to assign the optical branching devices ( obds ) to optical network units ( onus ) , and the other is how to determine the locationas of these obds 本文从当前存在的多种宽带接入方式谈起,提出了“宽带接入技术到底走向何方”的问题,然后得到毋庸置疑的结论:发展光纤接入技术是解决接入网宽带化的最根本和行之有效的办法。
The china telecom has completed third expansion of chinanet . as a result , the entire chinanet ranging from backbone network , municipal area network to access network has been put on the basis of broadband and bandwidth of its international gateway has reached 6g 中国电信完成了chinanet三期扩容,实现了chinanet从骨干网到城域网、接入网的全程宽带化,国际出口带宽增加至6g 。