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: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.
简介:TheproblemsofcharacteristicpolynomialassignmentinFomasini-Marchesini(F-M)modelⅡof2-Dsystemsareinvestigated.Thecorrespondingclosed-loopsystemsdescribedbyF-MmodelIIareobtainedviathestatefeedback.Usingthealgebraicgeometrymethod,thecharacteristicpolynomialassignmentinthedosed-loopsystemsisdiscussed.Intermsofthetheoryofalgebraicgeometry,theproblemofcharacteristicpolynomialassignmentistransferredtotheonewhetherarationalmappingisonto.SufficientconditionsforalmostarbitraryassignmentcoefficientsofcharacteristicpolynomialinF-MmodelⅡof2-Dsystemsviastatefeedbackarederived,andtheyareavailableformulti-inputcases.Italsohasbeenshownthatthismethodcanbeappliedtoassignthecharacteristicpolynomialwithoutputfeedback.Thesufficientconditionsforalmostarbitraryassignmentcoefficientsofcharacteristicpolynomialofmulti-input2-DsystemsdescribedbyF-MmodelⅡwithoutputfeedbackareestablished.
简介:临近空间平台是在信息化时代新军事变革远距离精确打击的现实条件下,出现的一种新型平台;它弥补了预警飞机探测距离不够和低轨卫星监视时间太短等缺点而必然产生的一种适合信息化作战的新型平台;它是一种地、海、空、天一体化的作战体系,一种侦察、警戒、干扰、指挥于一体的空间平台,其作战指挥功能和侦察干扰能力超过了预警飞机和干扰飞机。临近空间平台位置高、看得远,高度一般在20km~100km之间,适合于监视1000km远的精确打击目标,也适合于干扰和监视沿海在1000km内活动的航母战斗群,适合于对抗设在我国周围1000km左右距离的反导防御系统雷达前哨站。