The electronegativity equalization (EEM)-type model and the EtaInv-type model were developed based on this relation. In the case of the EEM-type model, the atomic property 1 P i was used to predict the environment-dependent onsite parameters η ii ; in the case of the EtaInvtype model, the atomic property 1 P i and the pairwise interaction 1 I ij were combined to directly predict the softness kernel η -1 .