Construction and analysis of urban eco-economic system model
城市生态经济系统模型构建与分析

The indicator system of urban eco-economic system (UEES) was established according to the economic principles and the system control. Ningbo City was taken as an example to develop a model of UEES by using the partial least square regression. The cross-validated Q2cum value for the UEES model was 0.996, indicating good stability and predictive capability. The results showed that, in 2007,2012 and 2020, gross domestic product (GDP) value in Ningbo city would be 2588×108 yuan, 3250×108 yuan and 5261×108 yuan, respectively. Energyconsumption, urbanization and industry structure were the most important factors affecting the extension of the economic scale. The amounts of wastewater and SO2 discharged per ten thousand yuan industrial products had a remarkable negative correlation with the economic scale. On the basis of this study, several suggestions were presented for the economic development in the construction of Ningbo eco-city.