Presentations and Publications Zhou, L., Kim, E., Hopke, P.K., Stanier, C., and Pandis, S.N., “Advanced Factor Analysis on Pittsburgh Particle Size Distribution Data”, Aerosol Science and Technology, Vol 38(S1), 2004, pp. 118-132. Positive matrix factorization (PMF) method was applied to
particle size-distribution data acquired during the Pittsburgh Air
Quality Study (PAQS) from July 2001 to August 2001. After removing
those days with nucleation events, a total of 1632 samples,
each with 165 evenly-sized intervals from 0.003 to 2.5 μm, were obtained
from scanning mobility particle spectrometer (SMPS) and
aerodynamic particle sampler (APS). The temporal resolution was
15 min. The values for each set of five consecutive-size bins were
averaged to produce 33 new size channels. The size distributions
of particle number as well as volume were analyzed with a bilinear
model. Three kinds of information were used to identify the
sources: the number and volume size distributions associated with |
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