Deep Collaborative Filtering: A Recommendation Method for Crowdfunding Project Based on the Integration of Deep Neural Network and Collaborative Filtering

Table 6

The NDCG of recommendation with different negative feedback collection methods on extremely sparse dataset.

Number of negative feedback	NDCG uniform	NDCG nonuniform
1	0.25393	0.05372
2	0.27859	0.0856
3	0.30628	0.09459
4	0.33299	0.11475