结构指标分为资源系统指标，社会经济系统指标和环境系统指标。功能性指标引入协调度的概念来进行描述，并给出了协调度计算的两种方法。
The structural index can be divided into the system index of resources, the system index of social economy and the system index of environment.
《中图法》结构庞大，标引方法和规则复杂，标引学术论文难度大。
The structure of Chinese Library Classification System is huge and its indexing methods and rules are complicated, making it difficult to index academic papers.
同时提出一种基于内容的图像标引与检索系统结构，能自适应的在图像语义库中添加较为成功的语义表述。
The same time, it raise a new structure of system of content based image indexing and retrieval which can adapt oneself for adding successful semantic users did to semantic database.
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