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在激烈的市场竞争中,企业只有敏捷抓住商机、快速推出新品,才能增强自身竞争力,赢得尽可能多的市场份额。快速原型制造技术是企业缩短产品面市时间的有效手段之一。本期焦点邀请有关学者、教授就快速原型制造技术的基本概念、快速原型制造技术的应用发展状况、应用快速原型制造技术迅速推出产品的方法等,发表了他们的真知灼见。 相似文献
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With the rapid developments of information technology,various industries become much more dependent on networks.Driven by economic interests and the game between countries reflected by growing cyberspace confrontations,evasive network attacks on information infrastructures with high-tech,high concealment and longterm sustainability become severe threats to national security.In this paper,we propose a novel two-phased method for the detection of evasive network attacks which exploit or pretend to be common legal encryption services in order to escape security inspection.Malicious communications which camouflage themselves as legal encryption application are identified in the SSL'session structure verification phase firstly,and then by serverside X.509 certificate based anomaly detection,suspicious attack behaviors are further distinguished effectively.Experiment results show that our method is very useful for detecting the network activities of certain unknown threats or new malwares.Besides,the proposed method can be applied to other similar services easily. 相似文献
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盘山发电厂一期工程1、2号机组的锅炉点火程控系统,由俄罗斯配套供应的ЛОМИКОНТ控制控制YKTC通用技术装置所组成。其控制范围包括炉膛吹扫笔24只点火器及重油喷燃器的启动,停止和吹扫,不包括煤粉喷燃器的控制,这套点火程控系统在中国是第一次应用,该文简要介绍系统的组成和用途,以及在盘山电厂机组点火过程中的使用效果。 相似文献