Exposure mixtures settings

Calculation settings

Table 117 Calculation settings for module Exposure mixtures.

Name	Description
Sparseness parameter	Sparseness parameter. Value between 0 (not sparse, many substances) and 1 (sparse, few substances).
Number of mixtures	The number of mixtures.
Iterations	Maximum number of iterations, e.g. 1000.
Seed for pseudo-random number generator.	Random seed for initialising matrix W and H.
Substance weighting	Risk based (exposures in equivalents of the reference substance) or standardised (standardised exposures per substance have mean 0 and variance 1).
Convergence criterion	Convergence criterion for factorisation algorithm.
Cutoff MCR	For selection of individual(day) exposures with maximum cumulative ratio (MCR = total exposure/maximum) above the cutoff.
Cutoff percentage in population ranked on total exposure	For selection of individual(day) exposures above the cutoff percentage in the set of individual(day)s ranked on total exposure.