Abstract
<p>Based on the perspective of keyword co word network, firstly, the total number and scale of keyword relationships are measured. Secondly, the centrality of keyword co word network is analyzed, including point degree centrality, point middle centrality, point proximity centrality and point feature vector centrality. Thirdly, the k-kernel analysis of keyword co word network is carried out. Finally, some meaningful research conclusions at the forefront of international eco city research from 1961 to 2011 are drawn.</p>
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