经过分析整个TETRA协议，提取出了其中与管理有关的内容，从而建立了TETRA区域的分层结构模型。
After analysis, the information about user management was extracted and the layered structure model of TETRA areas was established.
结果表明：除近核区域为正常的正电势外，碳纳米管结构模型的管内和管外为负电势区域；
The calculated results show that the electrostatic potentials of most areas are negative except the area nearby carbon nucleus.
第三章在系统分析构建循环经济评价指标体系原则的基础上，建立了区域循环经济评价指标的层次结构模型，并以福建省为例进行了实证研究；
The third chapter sets up the frame model on the foundation of analyzing the evaluation index system of regional circular economy, and makes a demonstration based on Fujian Province.
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