平凡人的网络故事

自1994年4月20日中国与国际互联网实现了全功能连接，成为国际互联网大家庭的第77个成员以来，中国的互联网络至今已经发展了整整10年。这10年来，中国网络潮起潮落，逐渐普及。这10年来，我们的目光一直为灿若星辰的知识英雄们所吸引，从张树新到丁磊，从马化腾到鲍岳桥，各路才俊的沉浮起落，一直让我们唏嘘不已的话题。     

利用NetRing系列MSTP开展城域网多业务

目前，运营商的竞争重点正在从骨干网转向城域网，城域网在整个电信网中的地位越来越重要。多业务传送平台(MSTP)作为建设新一代城域传输网的主流技术，能够很好地满足城域网传输多种数据的需求．结合有线和无线的宽窄带系统、NGN、企业网和3G系统，将使城域网业务开展得丰富多彩。当前，城域传输网业务可以分为如下几种：IP(以太网)数据业务、ATM数据业务、DDN业务、带宽出租业务、移动基站业务。     

诺基亚MSC服务器系统--高效的核心网解决方案

面对变幻莫测的商业环境，移动通信业正面临着多种挑战。虽然网络在不断地扩大，但移动电话每分钟的收入却在减少，运营商面临着如何能够使话音业务的收入最大化、如何保护现有的网络投资以及如何在提高GSM赢利的前提下部署WCDMA等挑战。     

Product Evaluation Knowledge Acquisition Based on Rough Sets

1 Introduction Acquiring knowledge is constantly encountered in the mechanical product evaluation process, such as during setting up evaluation index system and determining evaluation knowledge. The most useful expression form of knowledge is production rule whenever concerning the field knowledge or decision knowledge. How to effectively acquire and express the knowledge becomes the issue that the evaluation work must solve at first. One of an important application of the rough set theory is …     

An Algorithm For Selecting a Generator of Z_p

How to select a generator of Zp* is an important problem in cryptographic applications, where p is an odd prime. In this paper, we mainly consider the especial case that p is a safe prime, and give an algorithm for selecting a generator of Zp*,and find all generators of Zp* , where p is a safe prime. Our algorithm is more faster than the algorithm in [1]. Based on the proposed algorithm, one could find all generators of Zp* as well, where p is a perfect prime.     

SCO Management System Certification Research Class Opens in Beijing

The Shanghai Cooperation Organization (SCO) Management System Certification Research Class formally opened in Beijing on September 6, 2007. The research class was attended by government officials and experts in the fields of industry, commerce,environmental protection,statistics, standardization,metrology, detection and certification from Kazakhstan, Kyrgyzstan, Uzbekistan and Tajikistan.     

Effect of Mineral on Metallurgical Coke Solution Loss Reaction in Blast Furnace

Thecokesolutionlossreactionisoneofthemostimportanteffectsresultingincokepulverizinginblastfurnace .Thefactorswhichaffectreactionincludecokeporestructure ,micro crystalstructureonporewall ,thecontentandconstituentofminer als ,etc .Amongthesefactors ,theconstituentofmineralsisemphasizedallovertheworldinrecentyears .Buttheemphasisofmoststudieswasputontheeffectofalkalimetals (K ,Na)oncokesolutionlossreactionandtheeffectofotherelementswassel domreported[1-5] .Theeffectofthirteenmineralsoncokesolut…     

泡沫酸化工艺对川中低压裂缝性油藏适应性的认识

针对川中油田经过多年的消耗式开采,各主产油田压力很低,增产改造的难度增大的发展现状,提出应用泡沫酸化工艺技术在川中低压油层增产改造的技术方案,其中分析了泡沫酸的物理特性、其在地层优良的渗流特性(滤失小、酸岩反应速度慢、返排迅速等优点),并进行了泡沫酸液体系的室内配方研究,提出了工艺设施的矿场配套研究内容.得出了泡沫酸化工艺对川中低压裂缝性油藏改造具有很强的适应性,具有推广应用的价值.     

Model of Primary Austenite Dendrite Structure in Hypoeutectic Cast Iron

Ｉｔｗａｓｒｅｐｏｒｔｅｄ[1] ｔｈａｔｔｈｅｍｉｃｒｏ ｓｔｅｒｅｏｓｔｒｕｃｔｕｒｅｏｆｐｒｉｍａｒｙａｕｓｔｅｎｉｔｅｉｎｃａｓｔｉｒｏｎｃｏｎｓｉｓｔｓｏｆｐｒｉｍａｒｙｓｔｅｍｓａｎｄｓｅｃｏｎｄａｒｙａｒｍｓｔｈａｔ ｇｒｏｗａｃｃｏｒｄｉｎｇｔｏｄｅｎｄｒｉｔｅｃｒｙｓｔａｌｓｂｒａｎｃｈｒｕｌｅ ,ａｎｄｓｏｍｅｏｆｐｒｉｍａｒｙａｕｓｔｅｎｉｔｅｅｖｅｎｈａｖｅｔｈｉｒｄａｒｍｓ .ＭｉｙａｋｅＨｅｔａｌ[2 ]ｐｒｏｐｏｓｅｄａｃｏｎｃｅｐｔｏｆｒｅｇｉｏｎｍｏｄｅｌｂｙｓｔｕｄｙｉｎｇ…     

港湾网络面向NGN的综合接入万门局解决方案

随着NGN的到来，传统接入层的建设方式已经不能满足网络发展的要求，接入层的设备应该具有接入NGN的能力、提供统一的综合业务管理平台、具有大容量的多业务融合接入能力，具有性价比更高的建设优势。