The study is the part of the National Natural Fund project: "Research on quantitative retrieval of the main factors of desertification and assessment of remote sensing information" (No. 30371192).
本研究是国家自然基金项目“荒漠化因子定量反演及评价遥感信息模型的研究”(项目编号：30371192)的部分内容。
Information Content retrieval technology introduces quantitative analysis method, and the retrieval process is also a process of quantitative analysis.
信息内容检索技术引入了定量分析手段，检索的过程也是定量分析的过程。
A quantitative study for two kinds of indexing mechanism of the Chinese full-text database is given, based on the quantitative analysis of capacity, time, retrieval efficiency.
本文从定量方面就汉字全文数据库的单汉字、词索引两种机制在空间、时间、检索效率等方面进行比较分析。
The quantitative indexes for spectral curves such as moment, fractal and entropy are not suitable to retrieval because of poor similarity measure performance.
而光谱曲线量化指标如中心矩、分维数和信息熵等的效果较差，不适宜应用于检索。
The quantitative indexes for spectral curves such as moment, fractal and entropy are not suitable to retrieval because of poor similarity measure performance.
而光谱曲线量化指标如中心矩、分维数和信息熵等的效果较差，不适宜应用于检索。
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