以软交换为核心技术的NGN

网络发展的现状以及下一代网络 ( NGN)的发展已经成为人们关注的焦点 ,本文首先介绍了网络发展的现状 ,以及发展的总体趋势 ,由此引出下一代网络的模型 ,然后重点分析了下一代网络中的技术核心——软交换的基本概念 ,关键技术以及深远意义。文章最后对目前的网络如何向 NGN平滑演进提出了自己的几点思路。     

数字图书馆网络存储模式评析

本文介绍了目前主要的存储体系结构，分析了各种体系结构的主要特点和适用环境，并对数字图书馆的存储发展趋势作了一些探讨。     

江苏省高校图书馆网络数据库资源现状调查分析

通过对江苏省高校图书馆网络数据库资源分布、种类等的调查和统计，说明了江苏省高校图书馆网络数据库资源的现状、存在的问题，并对江苏省高校图书馆今后网络数据库资源建设提出了有关建议。     

Intercultural contacts and acculturation resources among International students in Australia: A mixed-methods study

This paper explores the impact of acculturation conditions, orientations and outcomes on international students in Australia’s tertiary education sector. Specifically, we investigate the factors that facilitate or hinder acculturation of international students within a multidimensional acculturation context (Arends-Tóth & van de Vijver, 2006). We used a sequential exploratory mixed-methods design in two studies to investigate acculturation of international students at an Australian university and test how these factors are related to psychological and sociocultural outcomes. In Study 1, we conducted a generic qualitative study using semi-structured interviews with a conventional content analyses approach,which compared the experiences of international students who on average had high numbers of positive experiences versus those who had high numbers of negative experiences. We found that a support network of mixed-nationals, and especially host locals, facilitates positive psychological and sociocultural adjustment, and buffers acculturative stress. Study 2 quantitatively tested the association of factors found in Study 1 (perceived stereotypes, intercultural and ethnic network/resources) with psychological and sociocultural acculturation outcomes. Study 2, shows that perceived negative stereotypes loosen ties with the dominant (host) culture and reinforces ties with the ethnic (non-host) culture. The social resources associated with either culture was found to be useful for acculturation, with both independently contributing to participant well-being. Contact with host locals played a particularly crucial role in developing these resources. Our findings provide foundations for pragmatic policy implications, suggesting value in the development of formally organized contact programs in the early sojourn experience of international students.     

存在与生成:基于文本接受的教学认识逻辑

文本是客观世界所呈现出的本体存在与应然样态。作为教学的文本具有客观性、接受性与认同性。由于对先验内容的观念体认,召唤结构的内发生成,共生互融的认同语境,使通过文本的教学得以可能。基于文本接受的教学认识逻辑,应回归知识本体,对文本进行由博返约;激发召唤结构,生发基于作品的动态文本;追寻期待视野,涵育共生性的对话交往,从而实现主体与文本的共存。     

SIP协议及其在网络中的应用

随着下一代互联网技术的不断发展,人们将不仅仅满足于将现有的PSTN(公共电话网)业务移植到IP网,而是需要电信运营商提供一个优秀的体系架构,将话音业务、视频业务、新兴的互联网业务整合到一个统一的框架中.SIP协议就是其中的关键纽带.     

早世代稳定水稻杂交合子传粉授精细胞学研究

对水稻早世代稳定机理研究推测其杂种合子发生了纯合化事件，本实验对杂种合子进行细胞学研究，结果表明在胚胎发育过程中未出现染色体片段渗透，体细胞成数分裂等现象。     

Header error control schemes for coping with upstream channel noise in the HFC network

The Hybrid Fiber-Coax (HFC) network is being paid close attention to in recent years as a bi-directional broadband access network. To achieve seamless connection with the backbone network, and Asynchronous Transfer Mode (ATM) Network Network Interface (NNI) cell format is used as the basic transmission packet unit in the HFC system. As the transmission condition of the HFC system’s upstream channel is bad, two improved header error control (HEC) schemes, i. e. the improved HEC and the cell interleaving technique, are employed to guarantee the packet integrity. Theoretical analysis of the results showed that the improved HEC and the cell interleaving technique are applicable to isolated random errors and burst errors, respectively.     

HEADER ERROR CONTROL SCHEMES FOR COPING WITH UPSTREAM CHANNEL NOISE IN THE HFC NETWORK

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高技术企业创业的成功因素

通过对美国及德国的十多年研究表明,对于创新及合作网络的投资有利于促进高技术行业企业不断进步和发展.这些高技术行业包括电信、电脑设备及生物工艺的行业.研究表明政府政策在促进竞争及支持地区合作网络发展中起到了极其重要的作用.