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

Table 5

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

Number of negative feedback	HR uniform	HR nonuniform
1	0.50524	0.10329
2	0.52366	0.19405
3	0.53311	0.24883
4	0.54268	0.28936