Mathematical Problems in Engineering

Research Article

Research on the Degree of Coupling between the Urban Public Infrastructure System and the Urban Economic, Social, and Environmental System: A Case Study in Beijing, China

Table 3

The standardized data of urban public infrastructure system.


year	Per capita social electricity consumption I₁₁	Per capita energy consumption I₁₂	Natural gas ratio I₁₃	Per capita heating area I₁₄	Railway and highway facilities density I₂₁	Per capita urban road area I₂₂	Number of public transportation lines I₂₃	Bus operation passenger traffic I₂₄	Per capita park green area I₃₁	Sewage treatment capacity I₃₂	Total number of urban vehicle sanitation special equipment I₃₃	Domestic garbage removal volume I₃₄	Per capita annual water supply I₄₁	Tap water supply pipe density I₄₂	Per capita tap water comprehensive production capacity I₄₃	Sewage pipe density I₄₄	Per capita postal and telecommunications volume I₅₁	Mobile phone penetration rate I₅₂	Fixed line mainline penetration rate I₅₃	Bureau number of post and telecommunications I₅₄

2000	0.0000	0.0000	0.0000	0.0000	0.0000	0.0000	0.3735	0.0000	0.0000	0.0000	0.0000	0.0000	1.0000	0.0000	0.6906	0.0000	0.0000	0.0000	0.0375	0.0000
2001	0.0364	0.0355	0.4163	0.1323	0.0329	0.4355	0.0000	0.1052	0.0637	0.0310	0.1859	0.0238	0.8757	0.0573	0.6780	0.0515	0.0002	0.1214	0.2048	0.0047
2002	0.2486	0.1929	0.4871	0.2382	0.0878	1.0000	0.1088	0.2088	0.1398	0.1078	0.2048	0.0447	0.5718	0.1010	1.0000	0.1335	0.0405	0.2386	0.3106	0.0177
2003	0.3754	0.3775	0.4421	0.4598	0.0961	0.0347	0.1912	0.0487	0.2748	0.1789	0.2572	0.1140	0.5935	0.1783	0.9396	0.1741	0.0989	0.3087	0.5085	0.0250
2004	0.5346	1.0000	0.4167	0.5401	0.1169	0.3915	0.1941	0.2276	0.2780	0.2616	0.3969	0.1911	0.4806	0.2535	0.6726	0.1751	0.1406	0.3923	0.8464	0.0213
2005	0.6168	0.6046	0.5918	0.6281	0.1248	0.6958	0.2088	0.2715	0.3634	0.4043	0.3861	0.2756	0.4204	0.2375	0.2708	0.1108	0.2142	0.4234	1.0000	0.0273
2006	0.7935	0.8251	0.6777	0.6882	0.8050	0.5245	0.2029	0.1504	0.3634	0.4188	0.4271	0.4224	0.3393	0.4586	0.3365	0.2561	0.3042	0.4430	0.8362	0.0278
2007	0.8480	0.9660	0.8351	0.7056	0.8344	0.5360	0.2765	0.1991	0.4565	0.4540	0.4337	0.5292	0.2861	0.5905	0.3396	0.4149	0.4704	0.4265	0.7713	0.1077
2008	0.9348	0.5646	0.9242	0.7949	0.7852	0.8167	0.3647	0.4542	0.6118	0.4155	0.5139	0.6257	0.2100	0.6958	0.2889	0.4317	0.5685	0.4015	0.6143	0.1062
2009	0.6154	0.4736	0.9181	0.7843	0.8338	0.7522	0.4294	0.6161	0.7516	0.4705	0.5081	0.6248	0.1509	0.7678	0.2873	0.4378	0.6478	0.4430	0.5461	0.1202
2010	0.6977	0.5010	0.9482	0.7856	0.8759	0.6693	0.5059	0.6919	0.8292	0.4891	0.5768	0.5847	0.0588	0.9124	0.2762	0.4351	0.7866	0.5070	0.4471	0.1949
2011	0.6670	0.3221	0.9069	0.8526	0.9162	0.5281	0.6147	0.7720	0.8758	0.4982	0.6396	0.5871	0.0501	1.0000	0.3496	0.4825	0.1624	0.6229	0.4027	0.2003
2012	0.7493	0.3294	0.9535	0.8643	0.9388	0.4847	0.6000	0.8674	0.9068	0.5377	0.8046	0.6113	0.0110	0.6863	0.0000	0.6432	0.2056	0.7785	0.3652	0.3074
2013	0.7987	0.3475	0.9351	0.8849	0.9602	0.5308	0.8088	0.9729	0.9379	0.5471	0.8536	0.6518	0.0000	0.7361	0.1110	0.7472	0.2914	0.8176	0.3072	0.4034
2014	0.8186	0.3363	0.9293	0.9136	0.9817	0.5898	1.0000	1.0000	0.9689	0.6132	0.9078	0.7595	0.0175	0.7895	0.3443	0.7759	0.3696	1.0000	0.2253	0.4405
2015	0.8369	0.2923	0.9769	0.9405	0.9859	0.5739	0.9971	0.8107	0.9845	0.6432	0.9661	0.8574	0.0312	0.8351	0.3379	0.8787	0.5771	0.9835	0.1433	0.6948
2016	1.0000	0.4077	1.0000	1.0000	1.0000	0.6353	1.0000	0.8023	1.0000	1.0000	1.0000	1.0000	0.0519	0.8695	0.3264	1.0000	1.0000	0.9304	0.0000	0.8269