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。     

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…     

Model of Primary Austenite Dendrite Structure in Hypoeutectic Cast Iron

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

CA:推动电子商务前进

2002年,CA中国的销售收入继续保持两位数增长,而且六大品牌的收入都同步增长,成绩喜人。此外,CA除继续同电信、金融等行业保持密切合作外,还成功地向传统的制造业和政府部门拓展,先后与北京高法、广东邮政、海尔、海信集团、嘉兴电力、中集集团、国航等合作。CA中国已经成为CA公司在亚洲地区业务增长最快的分支机构之一。 此外,CA2002年继续加大了对中国市场的投入。一系列重大市场活动的举行,使公司员工能够与用户、合作伙伴、业界专家进行全方位     

HYDRODYNAMIC FORCE ON SMOOTH HORIZONTAL CYLINDER IN UNIFORM OSCILLATORY FLOW

ＨＹＤＲＯＤＹＮＡＭＩＣ　ＦＯＲＣＥ　ＯＮ　ＳＭＯＯＴＨ　ＨＯＲＩＺＯＮＴＡＬ　ＣＹＬＩＮＤＥＲ　ＩＮ　ＵＮＩＦＯＲＭ　ＯＳＣＩＬＬＡＴＯＲＹ　ＦＬＯＷＨＹＤＲＯＤＹＮＡＭＩＣＦＯＲＣＥＯＮＳＭＯＯＴＨＨＯＲＩＺＯＮＴＡＬＣＹＬＩＮＤＥＲＩＮＵＮＩＦ...     

无线电引信多普勒信号增速器的研究

论述了无线电引信多普勒信号增速器的实现原理及意义，介绍了采用ＴＭＳ３２０Ｃ３０作为ＣＰＵ、多片大容量静态ＲＡＭ芯片构成海量存储体的信号增速器硬件结构和软件设计，并提出了今后的研究方向。     

关于解决黄牛鞋面革松面问题的探讨

本文讨论了在黄牛鞋面革生产过程中产生松面的原因，并经过多年的生产实践，摸索出解决松面问题行之有效的技术措施。