焦煤集团NGN通讯网络建设方案

依据焦煤集团通信网络的发展现状,说明对焦煤集团通信网进行NGN改造的重要性和必要性,建立了基于NGN和软交换技术的改造设计方案。     

NGN的核心技术与其发展空间浅析

下一代网络（NGN）的发展，NGN的核心技术的出台，打破了原有网络硬件设备的瓶颈，将实现因特网、移动通信网、固定电话网三方面的网络互通，从而达到全球范围内的信息资源共享。而软交换作为NGN的核心技术，是网络发展的必然趋势。     

下一代网络的安全技术分析

随着NGN技术和Everything over IP的发展,网络安全将变得越来越重要。在系统分析了基本网络安全威胁和下一代网络安全威胁的基础上,提出了NGN网络安全解决方案,并给出下一代网络安全建议。     

基于NGN核心技术的通信实验教学

下一代网络(NGN)以软交换技术为核心,目前已成为业内研究的热点。所以,开展基于软交换技术的通信实验教学和研究,其意义尤为重要。围绕NGN分层的、开放的体系结构,开展不同层次的通信实验研究和探索活动,为培养创新型人才作有益的尝试。     

现代远程教育瞩目IT高端

本文介绍IT高端技术WLAN、3G和NGN的最新进展和以现代教育观念为指导的高科技应用的观点，阐述了现代远程教育应该密切关注IT前沿的若干理由，分析并预测了IT的演进对未来远程教育的影响。     

基于软交换的下一代网络(NGN)研究

本文介绍下一代网络NGN的特征,网络结构,面向软交换(softswich)的解决方案及现有软交换技术及NGN的发展方向     

新一代网络技术系统下软件技术的发展趋势

本文以新一代网络(NGN)的总体架构为线索,对新一代网络技术系统下的软件技术总体发展趋势及相关软件技术方向进行了总结,为更好地把握网络技术与软件技术之间的关系指明了方向。     

基于软交换技术的PSTN网演进策略

软交换技术是利用软件实现基本呼叫控制功能,将呼叫控制和呼叫承载分离开,并提供开放的API业务接口,灵活实现各种新的业务需求．传统PSTN单纯的语音业务已经无法满足客户的业务要求,引入新技术进行改造成为必然．该文介绍了软交换技术的概念及其网络结构,并在此基础上提出了传统PSTN网引入软交换技术向NGN网络的融合演进策略方案,为实现PSTN向NGN的平滑过渡提供了可行的解决方案．     

下一代网络同步分析

下一代网NGN是基于分组交换的网络,它通过使用灵活带宽且具有QoS保证的传送技术,能够提供包括电信业务在内的各种业务。现有的基于电路交换的网络与将来基于分组的网络将在很长的时间内并存,NGN是在继承现有网络优势的基础上实现的平滑过渡。本文主要从各种网络业务对同步要求探讨NGN对同步的要求。     

下一代网络(NGN)中的媒体网关

下一代网络(NGN)是目前运营商和设备厂商都在讨论的热点技术，国内外许多网络运营商也都在探讨，并正在(或考虑)建试验网进行更深入的研究。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

库克斯顿城堡

城堡, 是欧洲典型的建筑之一, 每个城堡都有一个美丽的传说或是一段历史。从本期开始, 我们将推出“城堡之旅”, 带各位读者去浏览、观赏欧洲各地的城堡, 开始一段文化与历史的旅途!     

胡主席在印度,我却在中国

Today, Sunday morning, I sit thinking and typing at my computer. My thoughts are in my homeland, India and my body is in China. The body is here and mind there for a good reason. Mr. Hu is president and I am resident and both are in each other's countries (what a difference the absence of one small letter makes!). Mr. Hu will return in a few days and I will stay on longer.