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. 2021 Mar 2;25(2):386–401. doi: 10.1109/TEVC.2021.3063217

Fig. 3.

Fig. 3.

Predictor neural network. This diagram shows the Keras representation of the learnable predictor model. The previous 21 days of Inline graphic are fed into the context_input; the previous 21 days of stringency values for the eight NPIs are fed into the action_input. The Lambda layer combines the context branch Inline graphic and the action branch Inline graphic as specified in (9) to produce a prediction Inline graphic. The effects of social distancing and endogenous growth rate of the pandemic are processed in separate pathways, making it possible to ensure that stringency has a monotonic effect, resulting in more regular predictions.