Personal tools
User menu

Aerosol Lab 1

From atmoschem

Revision as of 08:57, 24 February 2017 by Atmoschem (Talk | contribs)

Jump to: navigation, search

Size distributions, integral quantities, and fitting to a lognormal distribution

Dataset

The dataset contains actual aerosol size distributions measured by the Scanning Mobility Particle Sizer (SMPS). Sent out by email.


Questions

任选观测期间的一个观测时间点:

  1. 根据资料画出n_N, n_N^e (以ln D为自变量的粒径分布),n_N^o (以log D为自变量的粒径分布)
  2. 根据资料画出n_N^o, n_S^o, n_V^o
  3. 根据画出的n_N^o,做lognormal拟合(自选模态数)。说明你的拟合步骤。把拟合结果与观测的n_N^o画在同一张图上,比较观测和拟合结果
  4. 根据上题拟合出来的lognormal distributions,推算出S和V的理论分布。并把这两个分布与观测的n_S^o、n_V^o画在同一张图上,比较观测和理论分布。

注意所有图形中,需标示清楚变量、单位、线条、观测时间等


Resources

  • 拟合可以用Excel粗略完成。也可以用Matlab等软件的拟合工具库做最小方差拟合。