Domain-Constrained Advertising Keyword Generation
Table 4. Manual evaluation.
['Model', 'Seq2Seq', 'CVAE', 'DCKG']
Results As it can be seen, DCKG obtains the best performance in all the metrics, indicating that our model can generate relevant and grammatical keywords. The best precision shows that more relevant keywords are generated by DCKG. Our model also achieves the best recall, indicating that DCKG is able to cover more potential user queries than other models. In addition, DCKG outperforms other models in domain accuracy, indicating that incorporating the domain constraint appropriately can enhance the quality of generated keywords. Moreover, DCKG ranks highest for all the four F-measures, showing that our model is superior considering all these factors.