Research Article
Keywords-Driven and Popularity-Aware Paper Recommendation Based on Undirected Paper Citation Graph
| Symbol | Definition |
| | A paper | k1, …, km | A node contains keywords | | An edge of a pair of nodes | Q | Users’ query keywords | K | A set of query keywords | | A set of nodes (papers) | | A set of edges | | Undirected paper citation graph | S(K) | An inverted index | T(Q) | Minimum group Steiner trees | T1(Q) | Optimal solutions | Q1 | A queue in ascending order of number of tree nodes | | Minimum group Steiner trees rooted at | | Paper recommendation results |
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