丹佛斯驱动发布HCA 121 EtherNet/IP^TM以太网扩展卡

据悉，丹佛斯驱动公司日前发布了最新的HCA 121 EtherNet/IP^TM以太网扩展卡,该产品是一款功能十分强大的网络接口模块，对应丹佛斯VLT Aummafion Drive系列交流驱动，主要用于在制造应用中部署标准以太网技术，同时也支持互联网和企业内部网络。     

Decomposition of the Two Lowest Lamb modes in a Bonded Plate

Based on the expression of the dispersion equation of Lame waves in an adhesive two-layered plate pressented in our proevious paper [Chin,Phys,Lett,18(2001)1483],the two lowest Lamb modes,the symmetric mode S0 and the antisymmetric mode A0 are successfully decomposed in the low-frequency regime,Relations between the rigidity of the bond and the velocity of the two Lamb modes are found,which lay a foundation for the estimation of the bond rigidity of the adhesive plate.The influence of the variations of the bond rigidity in terms of the stiffness constants KN and KT of the spring model on the velocity of the two Lamb modes in discussed and numerically evaluated.numerical results indicate that the deterioration of the bond rigidity causes the phase velocity decrease for Lamb modes of the two lowest order,thus having a possibility for the evaluation of the bonding state of the adhesive plate by using ultrasonic wave velocity measurement.     

阿尔卡特朗讯新闻

UMTS／HSDPA技术为AT＆T提供网络扩容与升级；T—Systems采用BiCS语音平台提供中小企业托管服务；在亚太区成立新的卓越中心；在全球移动大会展示推动转型强大实力。     

2003 International Powder／Bulk Conference ＆ Exhibition

Hosted by the Chinese Society of Particuology, China Powder Industry Association and Shanghai Science Technology Exhibition Company, with the sponsorship of Trans Tech Publications, Germany, and the organization of Worldwide Exhi-bitions Service Company, the above Conference/Exhibition, the largest of its kind in China, was held from Nov. 29 to Dec. 1 in Shanghai Mart, Shanghai. More than 100 professional equipment producers and market promotion agencies in powder/bulk handling and p…     

DSM宽带快车提速的“新交规”

DSM技术对铜线接入卓越的挖潜增效的能力,受到了各界关注,成为2008年DSL领域名副其实的“明星”技术,也是DSL宽带快车提速最可行、有效的“新交规”。     

位置服务：移动数据业务增长点

位置服务是移动数据业务新的增长点,其技术条件和市场条件已经具备。我国的位置服务经过几年发展,取得了一定成绩,但业务开展中还存在一系列问题,只有妥善解决这些问题,位置服务才能真正走向春天。     

技术动态：韩国TmaxSoft大举拓展中国SOA市场

TmaxSoft计划于2008年成立上海、广州等地区分支机构来促进中国区业务发展。引领SOA市场的发展、成为客户心中最有价值的软件公司是Tmaxsoft的愿景。     

城市有线电视网络中的增值业务HFC的无线扩展方案

欧洲和亚洲有线电视运营商在开展增值服务时大都面临着升级改造的高成本问题。随着无线设备的越来越普及和无线技术／标准越来越成熟，目前一些运营商逐步开始尝试HFC的无线扩展方案。     

日本FTTH小规模CATV系统动向

由于光纤技术的进步,日本不仅在大规模的CATV（CAble TeleVision）中已逐步采用了大容量、高速和较多频道的FTTH（光纤到户）技术,而且,最近又开始在小规模CATV设施中应用FTTH技术.     

国际市场动态

05年全球芯片销售较04年增长6.9%，全球厂商呼吁免电子产品关税以适应技术合流，全球10大半导体公司排名，2006年晶圆代工收入增长29%，……