Study on the Hierarchical Structure of the “Belt and Road” Aviation Network Based on K-Core Analysis

Table 1

Statistics of node and edge extinction in each layer network.

Coreness	Number of nodes	The number of extinct nodes	The percentageof extinct nodes	The number of edges	The number of extinct edges	The percentage of extinct edges
1	522	0	0.00%	6822	0	0.00%
2	429	93	17.82%	6642	180	2.64%
3	360	69	13.22%	6402	240	3.52%
4	318	42	8.05%	6182	220	3.22%
5	276	42	8.05%	5886	296	4.34%
6	251	25	4.79%	5656	230	3.37%
7	229	22	4.21%	5417	239	3.50%
8	216	13	2.49%	5249	168	2.46%
9	201	15	2.87%	5036	213	3.12%
10	182	19	3.64%	4727	309	4.53%
11	168	14	2.68%	4471	256	3.75%
12	153	15	2.87%	4175	296	4.34%
13	145	8	1.53%	3996	179	2.62%
14	122	23	4.41%	3444	552	8.09%
15	114	8	1.53%	3242	202	2.96%
16	96	18	3.45%	2731	511	7.49%
17	92	4	0.77%	2607	124	1.82%
18	70	22	4.21%	1901	706	10.35%
19	53	17	3.26%	1363	538	7.89%