简介:【摘 要】针对基于MIL-STD-1553B总线的机载网络系统,出现信息传输异常现象,现从设计原理上进行详细的分析,并提出排查方案,为机载MIL-STD-1553B总线信息传输异常排查提供借鉴。
简介:军队标号是对军事要素的图形化抽象标识。介绍了美军MIL-STD-2525B军队标号的组成和标号编码规则,分析了其开放性强、信息量大、编码规则明确并易于共享和扩充等特点,可供建立信息化条件下指挥信息系统态势标号体系参考。
简介:摘要:随着飞行器机载系统综合化水平的不断提高,对数据总线的速率、可靠性、确定性的要求也越来越高,Mil-1553b等传统数据总线已不能满足要求,Mil-1394b采用SAE AS5643标准,是以IEEE1394b为基础,面向军用和飞行器应用进行扩展和约束来进行增强,以达到满足安全关键/任务关键系统所需的鲁棒性和确定性的目的,适用于作为安全关键的航空总线等高可靠场合的应用。Mil-1394b总线在国内外军事及航空航天领域已经相继得到使用,本文基于1394b总线的容错机制对几种典型的总线拓扑结构进行可靠性研究,对1394b总线的应用具有一定的理论意义和实用价值。
简介:BMIL-53(Fe)/MWCNTshybridmaterialwaspreparedviathesolvethermalsynthesismethod.TheresultingsampleswerecharacterizedbyX-raydiffraction,FT-IRspectroscopy,scanningelectronmicroscopy,UV-Visabsorptionspectroscopy,theBrunauer-Emmet-Tellermethod,andphotoluminescencespectroscopy.TheresultshowedthattheintroductionofmultiwalledcarbonnanotubestotheMIL-53(Fe)canincreasethesurfaceareaofthecomposites,suppresstherecombinationofphotogeneratedelectron-holepairsandpromotetheelectrontransferprocess.ThehybridmaterialshowedoptimalphotocatalyticperformanceinthedegradationofRhodamineBundertheirradiationofultravioletandnaturallight.
简介:Epidemicsofsexuallytransmitteddiseaseshavebecomeworldwideseriousproblems.TheInstituteofDermatologyandVeneologyofWenshanAutonomousPrefectureinYunnanisacenterofpolitical,economical,culturalandsocialactivitiesintheprefecture.ItisalsothelocationoftheCommitteeofWenshananditsgovernment.WenshandataindicatesthatSTDshavebeenspreadingfromtownsofthisprefecturetothecountryside.
简介:Inordertoacknowledgethemulti-infectiondataofSTDpatientsandimprovetheprophylaxisandtherapyforSTDs,297patientsand30healthypeoplewereexaminedusingtheHSV-2plasmaantibody.TheresultsshowedthatallkindsofSTDpatientswereinfectedbyHSV-2indifierentratios.thehighestratiooccurringinsyphilispatients.
简介:Co(II)-salenwasencapsulatedinMIL-100(Cr)metalorganicframeworkby"shipinabottle"tosynthesizeanewelectrocatalyst,Cosalen@MIL-100(Cr).ThematerialwascharacterizedbyXRD,FT-IR,UV-VisandN2-adsorption.TheCosalen@MIL-100(Cr)modifiedglassycarbonelectrodeexhibitsawell-definedreductionpeakatthepotentialof–0.21Vtowardtheoxygenreductionreaction(ORR)bycyclicvoltammetry(CV)inpH=6.84phosphatebuffer.Almost400mVpositiveshiftofpotentialatCosalen@MIL-100(Cr)modifiedelectrodeforORRcomparedwiththatatbareglassycarbon,indicatesthatCosalen@MIL-100(Cr)possessesexcellentelectrocatalyticactivity.ThetransferrednumberofelectronsforORRwasdeterminedbychronocoulometry.TheresultsuggeststhattheintroductionofCo(II)-salencomplexintoMOFincreasestheelectrocatalyticactivityviaafour-electronreductionpathway.Furthermore,thiselectrocatalystexhibitsgoodstabilityandreproducibility.
简介:Objective:Tounderstandfemalebarbers''currentawarenessofSTD/AIDSandevaluatetheeffectofhealtheducationandbehavioralinterventions.Methods:53barbershopsinShenzhenwereselectedbysampling,andtheir382femalebarbersweregivenabase-linesurveyandassessmentofinterventionfollowingtheintervention.Results:ThesurveyshowedthatfemalebarbersgenerallyhavelittleeducationandknewlittleaboutSTDs/AIDS.TheyalsohadsomemisunderstandingaboutSTDs/AIDS.MostofthemknewthemaintransmissionofSTDs/AIDS''throughsexualcontact,butdidn''tknowwhetherAIDScouldbetransmittedthroughcasualcontactindailylife.TheirknowledgeofSTDs/AIDSwaslimited,buttheyhadlowercondomuseratesandcorrectideasaboutwhentoseethedoctor.Conclusion:HealtheducationandbehavioralinterventionrelatedtoSTD/AIDSonspecialpopulationwereeffectiveandofgoodsocialconsequence.
简介:CHINABROKETHEsilencethisNovember,hostingtheFirstChinaAIDS/STDConferencefromNovember13-16inBeijing.Theeventdrewalmost2000attendeesfromeveryprovinceinChinaandseveralinternationallyrenownedscientists,physicians,andpublichealthpractitionersfromtheinternationalAIDScommunity.