UPTDNet: A User Preference Transfer and Drift Network for Cross-City Next POI Recommendation

Figure 5

The long-term preference of user #121, represented as the visit frequency of POI categories. Categories with the same color belong to the same first-level category. (a) The visit frequency of POI categories in the home city. (b) The visit frequency of POI categories in the current city.

(a)

(b)