Exposure mixtures settings

Calculation settings

Table 124 Calculation settings for module Exposure mixtures.

Name	Description
Sparseness constraints	Sparseness parameter. Should be a value between 0 (not sparse, many substances) and 1 (sparse, few substances).
Number of mixtures	The number of mixtures.
Number of iterations	Number of iterations, e.g. 1000.
Seed for pseudo-random number generator.	Random seed for initializing matrix W and H.
Exposures are	Exposures are risk based (expressed in equivalents of the reference substance) or standardized.
Convergence criterion	Convergence criterion for factorization algorithm.
Cutoff for ratio total exposure/ maximum	For selection of individual(day) exposures specify cutoff for ratio total exposure/ maximum.
Cutoff percentage (%) for total exposure	For selection of individual(day) exposures specify cutoff percentage (%) for total exposure.