中文摘要：

气候和大气的环境上的喷雾器的影响取决于粒子的水举起能力；也就是，吸湿性的生长和激活进云冷凝作用原子核(CCN ) 。解决尺寸的激活比率(SRAR ) ，描绘在不同粒子尺寸和过度饱和充当 CCN 的喷雾器粒子的部分，能用微分活动性分析器(直接存储器存取) 和粒子柜台的联合被测量。基于直接存储器存取的大小被多样地控告的粒子和为每种规定粒子尺寸选择的 quasi-mono-dispersed 粒子(直接存储器存取转移功能的效果) 影响。理论研究，假定不同粒子数字尺寸分布和喷雾器的 hygroscopicity，被执行学习 DMA 转移功能并且在测量 SRAR 和导出的 hygroscopicity 上的多重收费的效果。结果证明未加工的 SRAR 能显著地被扭曲，如果数据没被改正， hygroscopicity 可以高度从真价值被偏导。转移功能的效果是相对小的并且取决于样品到鞘流动比率。然而，多样地控告的粒子能导致 SRAR 的大偏爱。这些结果强调倒置算法，被用来改正 DMA 转移功能并且多重收费的效果，为 SRAR 的精确测量是必要的。

英文摘要：

The impact of aerosols on the climate and atmospheric environment depends on the water uptake ability of particles; namely, hygroscopic growth and acti- vation into cloud condensation nuclei （CCN）. The size-resolved activation ratios （SRAR）, characterizing the fraction of aerosol particles that act as CCN at different particle sizes and supersaturations, can be measured using a combination of differential mobility analyzers （DMA） and particle counters. DMA-based measurements are in- fluenced by the multiply charged particles and the quasi-mono-dispersed particles （effect of DMA transfer function） selected for each prescribed particle size. A theoretical study, assuming different particle number size distributions and hygroscopicity of aerosols, is performed to study the effects of the DMA transfer function and multiple charging on the measured SRAR and the derived hygroscopicity. Results show that the raw SRAR can be significantly skewed and hygroscopicity may be highly biased from the true value if the data are not corrected. The effect of the transfer function is relatively small and depends on the sample to sheath flow ratio. Multiply charged particles, however, can lead to large biases of the SRAR. These results emphasize that the inversion algo- rithm, which is used to correct the effects of the DMA transfer function and multiple charging, is necessary for accurate measurement of the SRAR.