简介:【摘要】:本文通过研究FM报告并结合实际项目工程经验对FM认证重点关注内容进行总结,包括电子厂房内部不同场所的给排水、消防设计,冷却塔、洗涤塔、排气系统等消防设计,消火栓系统、气体灭火系统、消防水泵房等内容。对各系统形成了比较全面的技术方案性总结,为今后需要FM保险认证的项目提供设计参考。
简介:处于言语发育期的儿童,听力损伤将直接影响其语言能力的发展。感音神经性听力损伤是不可治愈的,助听器和人工耳蜗可以进行有效的听力补偿或听力重建,为听障儿童带来了福音。但助听器和人工耳蜗与人耳的功能仍有差距,听障儿童配戴助听器或植入人工耳蜗后还需要接受专业的听觉言语康复训练。在康复训练过程中,不可以忽略FM无线调频系统,它可以帮助听障儿童听得更清楚,听障儿童只有在“听清楚”的基础上,才能“说明白”。中国聋儿康复研究中心于2008年开始为在训聋儿提供FM无线调频系统服务,笔者通过临床使用及文献学习.对该系统有了进一步了解,现介绍如下。
简介:ThepassivebistaticradarbasedontheFMbroadcasthasinherentsuperioritywithrespecttoitssurvivability.Inthisarticle,theambiguityfunction(AF)andthecrossambiguityfunction(CAF)oftheFMradiosignalareanalyzedandillustrated.TheKolmogorovSmirnov(K-S)testverifiesthattheamplitudeprobabilitydensityfunctionoftheCAFsidelobesisexponential;thedistributionofthetargetisalsodeduced.Finally,thedetectionperformanceofthepassiveradarisstudied,andtheresultshowsthatthisnewtypebistaticradarhasfavorabledetectioncapability.
简介:Westudiedtheeffectsofnitrogen(N)andphosphorus(P)supplyonFv/Fm(maximalquantumyieldofphotosystemII)inthealgaeChaetocerosdebilis,Dicrateriainornata,PlatymonassubcordiformisandHeterosigmaakashiwotodeterminethesensitivityofFv/FmtoP-limitationofthefourspecies.ObviousdecreaseofFv/FmvaluewasmonitoredinperiodsofP-depletion,thedecreaseshowingdifferentmagnitudesamongalgalspecies.AmorecleardecreaseofFv/FminPlatymonassubcordiformisandHet-erosigmaakashiwowasobserved,comparedwiththatinChaetocerosdebilisandDicrateriainornata.AftertheresupplyofP,theindexFv/Fmofthefourspeciesallrecoveredquicklyin24h.CelldivisionwasmaintainedandchlorophyllcontentcontinuedtoincreaseuntiltheendoftheexperimentinPlatymonassubcordiformisandHeterosigmaakashiwo,whileinChaetocerosdebilisandDicrateriainornata,thedivisionstoppedinthelaterperiodwhenthegrowthoforganismscameintothestationaryphase.ThemostobviousrespondofchlorophyllcontenttoP-additionswasobservedinHet-erosigmaakashiwoculturein24h.ThesensitivityofFv/Fmtonutrientlimitationsisdifferentamongalgalspecies,andmuchshouldbedonetoimprovetheapplicationofthisindex.