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f ratio

  • n. 方差比; F 值

网络释义专业释义英英释义

  焦比

不单是这原因, 还要降低焦比(F-ratio), 如SCT用6.3减焦镜, 焦比由10变为6.3, 那原本要曝光两分半钟才见得到的天体, 现在曝光不足1分钟便可见得到。

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短语

f ratio 方差比

maximum F-ratio 最大F比

F ratio F 比率

modified F ratio 改良F波比率 ; 波比率

Two-level F-ratio 二阶F比

f-ratio f 变方比

high f ratio oligo-peptide 高f值寡肽

high f ratio 高f值

relief f ratio 硫高宽比

 更多收起网络短语
  • f比值
    变方比

·2,447,543篇论文数据,部分数据来源于NoteExpress

F-ratio

  • abstract: In oceanic biogeochemistry, the f-ratio is the fraction of total primary production fuelled by nitrate (as opposed to that fuelled by other nitrogen compounds such as ammonium). This fraction is significant because it is assumed to be directly related to the sinking (export) flux of organic marine snow from the surface ocean by the biological pump.

以上来源于: WordNet

双语例句

  • For example, the focal length of an 8" (203.2mm) aperture with a focal ratio of f/10 would be 203.2 x 10 = 2032mm.

    比如孔径8英寸(203.2mm),焦比f/10的透镜,其焦距为203.2 x 10 = 2032mm。

    youdao

  • Only some parameters such as theoretical A/F ratio and modified coefficients of sub models needed to modify little, when simulating the characteristics of engine using different gas.

    燃用不同燃气时,只需对其中一些参量理论空燃等)模型修正系数进行微调即可。

    youdao

  • CONCLUSIONS: Characteristics that distinguish elderly from younger HCC patients include lower M/F ratio, worse performance status, lower rate of HCV infection, and less advanced underlying cirrhosis.

    结论年长组区别年轻组HCC患者特征包括M/F比率更差体力状态、较低的HCV感染率以及较少进展肝硬化

    youdao

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