Table 2 Aggregation function special cases
Model | Hidden states | Aggregation form |
|---|---|---|
MPNN | \(h_{v}^{\left( t \right)}\) | \(M_{t} \left( {h_{v}^{\left( t \right)} ,h_{w}^{\left( t \right)} ,e_{vw} } \right) = f_{NN}^{{\left( {e_{vw} } \right)}} \left( {h_{w}^{\left( t \right)} } \right)\) |
AMPNN | \(h_{v}^{\left( t \right)}\) | \(A_{t} \left( {h_{v}^{\left( t \right)} ,\left\{ {\left( {h_{w}^{\left( t \right)} ,e_{vw} } \right)} \right\}} \right) = \mathop \sum \limits_{w \in N\left( v \right)} f_{NN}^{{\left( {e_{vw} } \right)}} \left( {h_{w}^{\left( t \right)} } \right) \odot \frac{{{ \exp }\left( {g_{NN}^{{\left( {e_{vw} } \right)}} \left( {h_{w}^{\left( t \right)} } \right)} \right)}}{{\mathop \sum \nolimits_{w' \in N\left( v \right)} { \exp }\left( {g_{NN}^{{\left( {e_{vw'} } \right)}} \left( {h_{w'}^{\left( t \right)} } \right)} \right)}}\) |
EMNN | \(h_{vw}^{\left( t \right)}\) | \(A_{t} \left( {e{^{\prime}}_{vw} ,S_{vw}^{\left( t \right)} } \right) = \mathop \sum \limits_{{x \in S{^{\prime}}_{vw}^{\left( t \right)} }} f_{NN} \left( x \right) \odot \frac{{{ \exp }\left( {g_{NN} \left( x \right)} \right)}}{{\mathop \sum \nolimits_{{x{^{\prime}} \in S{^{\prime}}_{vw}^{\left( t \right)} }} { \exp }\left( {g_{NN} \left( {x{^{\prime}}} \right)} \right)}}\) \(S{^{\prime}}_{vw}^{\left( t \right)} = S_{vw}^{\left( t \right)} \rm{\bigcup }\left\{ {e_{vw}{^{\prime}} } \right\}\) |