Background
Related work
Personalized fitting
s1
| s2
| s3
| … | s4
| … | s5
| |
---|---|---|---|---|---|---|---|
u1
| 1 | 2 | 4 | … | 4 | … | 1 |
u2
| 3 | 3 | … | … | |||
u3
| 5 | 1 | … | 3 | … | 4 | |
… | … | … | … | … | … | … | … |
um
| 2 | 4 | 1 | … | rm,n
| … | 5 |
… | … | … | … | … | … | … | … |
um
| 2 | 3 | … | 5 | … | 2 |
Similarity measurement
Similarily score set
Personalized fitting
Deviation adjustment by support vector regression
SVR
Deviation adjustment model
\(u_{m}\)
|
\(s_{n}\)
| Deviation |
\({\text{P}}_{u}^{1}\)
|
\({\text{P}}_{u}^{2}\)
|
\({\text{P}}_{u}^{3}\)
|
\({\text{Q}}_{s}^{1}\)
|
\({\text{Q}}_{s}^{2}\)
|
---|---|---|---|---|---|---|---|
1 | 15 | 0.35256 | 0 | 1 | 20 | 2 | 9 |
45 | 157 | −0.24610 | 0 | 1 | 15 | 3 | 6 |
108 | 50 | 0.54350 | 1 | 2 | 4 | 1 | 4 |
204 | 123 | 1.23811 | 0 | 3 | 11 | 0 | 13 |
335 | 1001 | −1.47634 | 1 | 1 | 8 | 2 | 4 |
…. | …. | …. | … | … | … | … | … |
Experiments
Data set and setup
Experimental result and analysis
Method | BASIC | BPNN | SVR |
---|---|---|---|
User-based CF | 0.760 | 0.756 | 0.750 |
Item-based CF | 0.761 | 0.755 | 0.749 |
PF | 0.745 | 0.743 | 0.740 |