basin eco-environmental quality evaluation 流域生态环境质量评价
Highway Eco-environmental quality evaluation 公路生态环境质量评价
Tourism eco-environmental quality evaluation system of Yanqing was established.
建立了延庆县旅游生态环境质量评价体系。
A grey relation projection model for regional eco-environmental quality evaluation is established based on grey system theory and vector projection principle.
基于灰色系统理论和矢量投影原理，建立了区域生态环境评价的灰色关联投影模型。
This paper firstly points out the necessity in mountain eco environmental quality evaluation and then examines the principle in selecting evaluation system.
本文首先指出山区生态环境质量评价的必要性，进而阐述了评价体系选择的原则。
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