Evaluation of the Urban Low-Carbon Sustainable Development Capability Based on the TOPSIS-BP Neural Network and Grey Relational Analysis

Table 3

Test results based on the topsis model.

Years	Test results
	Beijing	Shanghai	Guangzhou	Shenzhen
2009	0.192	0.398	0.319	0.307
2010	0.155	0.379	0.302	0.298
2011	0.193	0.335	0.218	0.379
2012	0.238	0.304	0.205	0.474
2013	0.697	0.332	0.228	0.384
2014	0.280	0.423	0.244	0.447
2015	0.293	0.441	0.262	0.439
2016	0.308	0.509	0.261	0.459
2017	0.313	0.514	0.605	0.544
2018	0.358	0.569	0.692	0.545