检索理论 meaning in English

search theory

The development of theories and practices of information retrieving in network environment
网络环境中信息检索理论与实践的发展
This text discusses the theory of searching based on content , proves basic principle and system frame
对基于内容的图像检索理论进行了研究，给出了图像检索的基本原理和该检索系统的组成和初步构建。
The subject makes an analysis on the theory frame of nowadays video retrieval , add the improvements to the traditional algorithms of printed character recognition , and realize the real - time text detection and character recognition on the complex background
本课题分析了现有的视频检索理论框架，并对传统的文字识别算法加以改进，实现了视频帧中复杂背景下的实时文字检测与数字识别。
Third , the dissertation specifies the spatial join query processing based on service oriented architecture . two strategies are proposed . the first one , called the ssji strategy , can efficiently reduce the overall costs by precomputing and materializing the spatial semi join results
最后,论文研究了空间数据服务发现问题,基于信息检索理论,提出了基于集合模型和向量模型的服务发现方法,提高了服务发现的查全率和查准率。