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. 2009 Apr 29;53(4):409–424. doi: 10.1093/annhyg/mep017

Table 3.

Parameter estimates for models with G and Q also assumed unknown and estimated: the block on the left fits the model assuming independence between the fields (i.e. τNF = 0), while the block on the right corresponds to a dependent model that estimates τNF

Independent model (τNF = 0)
Dependent model (τNF estimated)
Estimates 2.5% 97.5% Estimates 2.5% 97.5% True value
β 5.21 3.86 6.39 5.61 4.69 6.12 5.00
τN 1.01 0.77 1.36 0.92 0.66 1.40 1.00
GSD(τN) 2.73 2.40 3.21 2.61 2.25 3.26 2.72
τF 0.61 0.47 0.82 0.57 0.40 0.86 0.64
GSD(τF) 2.18 1.98 2.47 2.13 1.88 2.53 2.23
τNF 0 0 0 0.45 0.25 0.82 0.50
G 351.23 298.17 408.55 384.84 320.89 419.10 351.48
Q 12.58 11.07 16.42 14.87 11.18 16.79 13.78
log(Inline graphic) 4.52 2.51 6.50 4.55 1.96 7.22 4.72
log(Inline graphic) 3.28 1.70 4.85 3.27 −0.19 6.62 4.20
β Interzonal airflow rate (m3 min−1)
G Contaminant's mass emission rate (mg min−1)
Q Room supply and exhaust airflow rate (m3 min−1)
τN, τF Variance for measurement error at near and far field (log scaled)
τNF Covariance between near and far field for measurement error (log scaled)
GSD(τN) Geometric standard deviation for measurement error at near field
Inline graphic, Inline graphic Steady-state concentration at near and far field (mg m−3)

The simulated data set was generated using true parameter values indicated in the rightmost column.