Spatial-Temporal LSTM network proposed in Kong D, Wu F. HST-LSTM: A Hierarchical Spatial-Temporal Long-Short Term Memory Network for Location Prediction[C]//IJCAI. 2018: 2341-2347. Implemented with PyTorch.

• Core implementation is in stlstm.py - STLSTMCell.
• An example is presented in stlstm_nextloc.py. Some implementation is modified to fit into my task, but the calculation of slots and process of linear interpolation is general.