文件名称：稀疏表示文档
文件大小：395KB
文件格式：PDF
更新时间：2017-10-07 10:04:26
稀疏
Novelty-based diversification provides a way to tackle ambiguous queries by reranking a set of retrieved documents. Current approaches are typically greedy, requiring O(n2) document-document comparisons in order to diversify a ranking of n documents. In this article, we introduce a new approach for novelty-based search result diversification to reduce the overhead incurred by document-document comparisons.