Spatial coupling characteristics of eco-environment quality and economic poverty in Lüliang area. The dynamic coupling model of the harmonious development between urbaniza-tion and eco-environment and its application in arid area Effects of exposure to weak light at low temperature on trans-membrane proton gradient of thylakoids of cucumber and spinach Coupling analysis of the agricultural ecological economic system over 70 years in the Zhifanggou watershed, Shaanxi Province Coupling analysis of agro-ecolomic system in gully area of Loess Plateau in 1949-2008: A case study in Changwu County of Shaanxi Province. Coordinated evolvement of dynamic coupling between economic and environmental systems in Shenyang Metropolitan Area.