图 书 馆
相似的实体有相似的嵌入吗？Do Similar Entities have Similar Embeddings? |
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| 课程网址: | https://videolectures.net/eswc2024_hubert_similar_entities/ |
| 主讲教师: | Nicolas Hubert |
| 开课单位: | 2024年上海世博会 |
| 开课时间: | 2024-06-18 |
| 课程语种: | 英语 |
| 中文简介: |  |
| 课程简介: | Knowledge graph embedding models (KGEMs) developed for link prediction learn vector representations for entities in a knowledge graph, known as embeddings. A common tacit assumption is the KGE entity similarity assumption, which states that these KGEMs retain the graph’s structure within their embedding space, i.e., position similar entities within the graph close to one another. This desirable property make KGEMs widely used in downstream tasks such as recommender systems or drug repurposing. Yet, the relation of entity similarity and similarity in the embedding space has rarely been formally evaluated. Typically, KGEMs are assessed based on their sole link prediction capabilities, using ranked-based metrics such as Hits@K or Mean Rank. This paper challenges the prevailing assumption that entity similarity in the graph is inherently mirrored in the embedding space. Therefore, we conduct extensive experiments to measure the capability of KGEMs to cluster similar entities together, and investigate the nature of the underlying factors. Moreover, we study if different KGEMs expose a different notion of similarity. |
| 关 键 词: | 相似实体; 相似嵌入; KGEM |
| 课程来源: | 视频讲座网 |
| 数据采集: | 2024-08-10：liyq |
| 最后编审: | 2024-09-29：liyy |
| 阅读次数: | 17 |