Research on the synergistic effects of urbanization and ecological environment in the Chengdu-Chongqing urban agglomeration based on the Haken model.

In 2001, the distribution range of hotspots was relatively small, showing a typical “dual-cluster” distribution pattern, with significant-low significant clusters formed by Deyang and Chengdu, as well as by Qijiang, Jiangjin, and Nanchuan, without the presence of highly significant hotspot distribution areas.

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The differences between the G ( d ) and E ( d ) values for 2008, 2014, and 2020 are 0.0233, 0.0238, and 0.0292, respectively; this difference gradually increases, indicating an increasing trend of spatial clustering in the synergy development level between 2008 and 2020 in the Chengdu–Chongqing urban agglomeration.

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