Research Article

[Retracted] Recommending Crowdfunding Project: A Graph Kernel-Based Link Prediction Method for Extremely Sparse Implicit Feedback

Table 6

Comparison of the proposed approach and baselines on extremely sparse dataset.

AlgorithmsHRNDCG

ItemPop0.3090.178
eALS0.360.207
BPR0.3390.195
NIRec0.4960.288
Graph kernel0.5290.307