Similarly, document retrieval from an XML column requires serialization, that is, converting the parsed XML format back into its original textual representation.
类似地，对xml列进行文档检索需要串行化，即，将已解析的xml格式转换回其原始文本表示。
Text extraction is a key technique in content-based video retrieval as textual information plays an important role in describing the content of image.
文字信息在描述图象内容时起着重要的作用，因此文字提取及识别是基于内容视频检索的关键技术。
The parallel computing is realized based on MPI parallel computing platform, and increased speed of retrieval. 5 The implementation of textual case retrieval system.
本文基于MPI并行计算平台设计并实现了文本案例检索算法的并行化，提高了检索速度。
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