The technical preview supports the retrieval of events via event group and GUID.
技术预览版支持通过事件组和 GUID 接收事件。
Firstly, we processed hierarchy structure partition to the video, and analyzed the necessity of events as the retrieval units from the point of rogatory granularity in video retrieval;
首先对视频进行了层次化的结构划分，从视频检索的查询粒度角度分析了以事件作为检索单元的必要性；
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