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中国农学通报
基于主成分的河北省地级市城市生态安全预警评价
郑泽娜 周伟
Evaluation of Urban Ecological Security Warning in the Prefecture-level City of Hebei Province Based on Principal Component Analysis
中国农学通报 . 2013, (14): 118 -123 .  DOI: 10.11924/j.issn.1000-6850.2013-0340