简介:介绍了一种适用于微细金属线恒张力放线的主动放线机的结构原理,详细论述了以单片机PIC18F66J10为主控芯片,以SLA7026为步进电机驱动芯片的硬件电路设计和以PI控制算法为主的系统软件设计方法。
简介:Thefluorineionsensitivefield-effecttransistor(F--ISFET)ismadebydepositingverythinLaF3filmongridoffield-effecttransistorwithsputtermethod.Theoperatingprinciple,measuringmethodandmeasuredresultsofF--ISFETaregiven.Themeasuredresultsshowthatthiskindofsensorhashighersensitivity,shorterresponsetimeandbetterlinearity.Onthebasisofexperimentalresults,thefactorofinfluencingthesteadinessandrepeatabilityofF--ISFETareconjectured.
简介:TheconceptofF-knowledgeispresentedbyemployingS-roughsets.ByengraftingandpenetratingbetweentheF-knowledgegeneratedbyS-roughsetsandtheRSAalgorithm,thesecuritytransmissionandrecognitionofmulti-agentF-knowledgeareproposed,whichincludesthesecuritytransmissionofmulti-agentF-knowledgewithpositivedirectionsecretkeyandthesecuritytransmissionofmulti-agentF-knowledgewithreversedirectionsecretkey.Finally,therecognitioncriterionandtheapplicationsofF-knowledgearepresented.ThesecurityofF-knowledgeisanewapplicationresearchdirectionofS-roughsetsininformationsystems.
简介:研究表明含氟气体的性质决定了原子氟(F)的转化效率,通常在CxFy气体中x的值越大,氟(F)的转化效率也就会越高。所以C3F8(八氟丙烷)比C2F6(乙氟烷)具有更高的利用效率,更少的PFC(全氟化物)的排放。文章主要研究在以四乙氧基硅烷(TOES)为基础的离子增强化学气相沉积(PlasmaEnhancedChemicalVaporDeposition,PECVD)的清洗制程中,利用分解效率高的C3F8气体取代C2F6气体。通过实验设计(DesignOfExperiment,DOE),调整腔体压力、射频(RF)功率、气体流量等参数,最终得到最优化的新清洗配方。应用到实际的量产中,有效地降低了成本,减少了PFC的排放。
简介:Basedonthewhiteningpropertyofwavelettransformationfor1/fnoise,thispaperaddressestheproblemofdetectingdeterministicsignalsinthepresenceof1/ffractalnoise.Thetransferfunctionofwhiteningfilterisprovidedaswellastheconditionforwhitening.ThereceiverstructurebasedonKarhunen-Loeveexpansionandthedecisionrulearealsogiven.Finallyperformanceofthedetectorisanalyzed.
简介:2012年10月间,美国EchoStar通信公司向劳拉空间系统公司(SS/L)订购了一颗新一代电视直播卫星EchoStar18,该卫星未来升空后将提供给美国第二大的直播卫星电视运营商DISH网络公司使用;欧洲两大卫星运营商SES和Eutelsat公司也分别订购了两颗新一代通信卫星SES9及Eutelsat8WestB,其中SES9卫星升空后将服务于亚洲及印度洋区域,而Eutelsat8WestB将为中东和北非地区增加新的广播资源。在此期间,欧洲阿丽亚娜空间公司(Arianespace)获得了两颗印度卫星GSAT7和Insat3D的发射服务合同。
简介:Byusingtwo-directionalS-roughsets,theconceptsof(f,f)-interferencegenerationand(f,f)-inter-ferencelawgenerationofknowledge,F-interferencegenerationandF-interferencelawgenerationoftwo-directionalS-roughsetsareproposed.Basedontheconceptsabove,therelationtheoremsbetweenF-interferencelossandF-interferencedegree,therelationtheoremsbetweenF-interferencelosslawandF-interferencedegreelaw,thediscernibilitytheoremsbetweenF-interferenceandF-interferencelawarepresented.Atlast,therecognitioncriterionofF-interferencelawanditsapplicationaregiven.