Semantic similarity is the crucial factor affecting the precision rate and recall rate of semantic information retrieval system.
语义相似度是影响语义检索系统查准率和查全率的重要因素。
None but combine the multi-character, especially semantic information, can the capability of retrieval system approach the human mentally level.
只有结合图像的多种信息，特别是语义信息，才能使检索系统的能力尽可能接近人的理解水平。
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