Acrylonitrile is a kind of important chemical raw material . in this paper , technical development trends of acrylonitrile were elaborated in details . and some development suggestions were put forward 摘要簡要介紹了丙烯腈的國內(nèi)外生產(chǎn)情況,詳細(xì)闡述了丙烯腈的技術(shù)開發(fā)動(dòng)向和技術(shù)發(fā)展趨勢(shì),并對(duì)我國丙烯腈技術(shù)發(fā)展提出了建議。
Based on an analysis of the present situation of automatization in metro and the technical development trend of automatization in metro in china and abroad , the solution to how to achieve comprehensive automatization in metro is put forward 摘要通過對(duì)國內(nèi)外地鐵自動(dòng)化現(xiàn)狀的分析及技術(shù)發(fā)展趨勢(shì)的研究,探討如何實(shí)現(xiàn)地鐵綜合自動(dòng)化的具體解決方案。
This text elaborated a network information the target of the safety and constitute , carrying on summary from the technique and the management , analyzing physically applied medium of various technique means with safe network information , and to domestic and international the information safe technical development trend and new the direction carried on introduction 本文闡述了網(wǎng)絡(luò)信息安全的目標(biāo)和組成,從技術(shù)和管理上進(jìn)行總結(jié),分析了實(shí)際應(yīng)用中的各種網(wǎng)絡(luò)信息安全技術(shù)手段,并對(duì)國內(nèi)外信息安全技術(shù)的發(fā)展趨勢(shì)和新方向進(jìn)行了介紹。