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. 2017 Aug 30;7:9920. doi: 10.1038/s41598-017-09582-7

Table 1.

Fitness metrics used during the test of the guided algorithms.

Name Equation Captures
Chi q(|FFT(ρ(r))|I(q))2I(q) Agreement to measured (noisy) data. The minimum in this metric is selected.
Sharp r|ρ(r)|4 Uniformity of reconstructed amplitudes. The minimum in this metric is selected.
Sharp norm (r|ρ(r)|1/4)4 Based on the Sharp metric but preserving the units of ρ. The minimum in this metric is selected.
Max Volume r|ρ(r)|/max|ρ(r)| with |ρ(r)|<0.2=0, |ρ(r)|0.2=1 Total volume of the reconstructed crystal. The maximum in this metric is selected.