低圧インパクタを用いた大気エアロゾル粒子の粒度分布測定におけるデータ処理 Data Reduction on the Measurement of the Size Distribution of Atmospheric Aerosols by a Low-Pressure Cascade Impactor

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抄録

Twomey's nonlinear iteration method was applied to retrieve the size distribution of atmospheric aerosols from data obtained by an Andersen low-pressure impactor. Effects of some factors on the inversion results were investigated using numerically generated data for unimodal and bimodal lognormal functions. The factors were weighting functions, first-guess distributions and treating the ends of the distribution. The pth power of response function was adopted as a weighting function and a value of 0.7 was selected for the inversion of data in most cases. Smoothed initial distribution with the treatment of the ends of the distribution gave good results in case of the distribution showing a peak near the first stage of the impactor, while uniform initial guess resulted in an oscillatory distribution. We proposed a new stopping criterion based on experimental errors which represent random errors in mass measurement and sample fluctu- ation. and the criterion is useful for inverting the data involving random errors. The procedure was also applied to estimate the size distribution for ambient aerosol samples.

収録刊行物

  • エアロゾル研究 = Journal of aerosol research  

    エアロゾル研究 = Journal of aerosol research 11(2), 137-144, 1996-06-20 

    日本エアロゾル学会

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各種コード

  • NII論文ID(NAID)
    10002687092
  • NII書誌ID(NCID)
    AN10041511
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09122834
  • NDL 記事登録ID
    3986829
  • NDL 雑誌分類
    ZP5(科学技術--化学・化学工業--化学工学)
  • NDL 請求記号
    Z17-1062
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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