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    O|ھ|“ϵʽgӭR|ݸКW˭hƼ޹˾پW
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    „YӍ

    ǰλã > „YӍ > ʲô܇؝ȕ׃

    ʲô܇؝ȕ׃

    c959 ڣ2019-8-14

    ۂĕTʹ܇ص܇صăӱeҲиԵһ׷yt\෨„С҂˾CҲ쾚

    \܇صă

    ɫ͸o„еζsʮִ̱ǣߜ³⣩۹xyǷ31.8-33.2%֮gСڳصYٶ

    ʲô܇؝׃

    ĵĿтlFһ}ԁ܇صĝȶ֮ǰͬһ؛Iĕr32.8%Fȥ32%쵪]lˆ

    ҂Ŀǰ֪Ԝy܇؝ȵķIһӋҺڲƬͨ^۲鿴̶@Nڴr߀DZ^ʵЂСС}۹ʕSضȵ߶@Ӿͺܺýጞʲô҂I܇؝ȕ

    ۹ʵĜضУ
    һfضһȕrҺwЙC۹ʾ͜pС3.510-45.510-4ijЩҺw؄eǴ۹ʵĜضccrضϵ_710-4ڌHijһضœy۹ʓQһضµ۹˱Ӌһ4.510-4ض׃@ӋõĔֵ`sЅrֵQ֮۹Sضȵ߶zϜضÿ׃1۹ʴs׃0.00045҂܉ͨ^ĹʽӋõУ20۹ʣnD(t) = nD(20) - 0.00045(t-20)
    nD(t) ڜض t ryõ۹@ڌضȸ20rnD(20) nD(t) ضȵ20rnD(20) t nD(t) С
    ֪ nD(t) =1.3667 t=25.2ӋnD(20)
    nD(t)=nD(20) - 0.00045(t-20)
    nD(20)=1.3667+0.00045(25.2-20)
    =1.3667+0.00045 5.2
    =1.36904

    ܇؝ȵČҙzy

    A񹲺͇Ҙ˜GB29518-2013UAS 32܇أĝșzy_Ҏõȼzy

       ͵đɱ³ɴǹ̵ĹСΨcTтͬL\lչڮaƷP}߀ЩҪСΨgӭ