Time complexity comparison of four approaches
| CF approach | LDA-based approach | HR_Wei approach | Our approach | |
|---|---|---|---|---|
| Order of magnitude of total time complexity | n2 | n2 | n2 | n2 |
| Orders of magnitude of online recommendation service time complexity | n2 | n2 | n2 | n |
| CF approach | LDA-based approach | HR_Wei approach | Our approach | |
|---|---|---|---|---|
| Order of magnitude of total time complexity | ||||
| Orders of magnitude of online recommendation service time complexity |
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