Extracting query-document relevance from the sparse, biased clickthrough...
Passage re-ranking is to obtain a permutation over the candidate passage...
Query understanding plays a key role in exploring users' search intents ...
Retrieval is a crucial stage in web search that identifies a small set o...
Post-click conversion, as a strong signal indicating the user preference...
As the heart of a search engine, the ranking system plays a crucial role...