NFR in 1995 NFR in 2015
Changes of R1 and R2
Connected components
Network state
<15% <25% Unchanged basically Unchanged The network structure was complete and stable.
25%-33% The downward trend was broadly consistent. Increased slowly Network fragmentation was increasing
15%-46% 33%-52% Significant difference Increasing Network fragmentation was increasing.
46%-95% 52%-98% R1 and R2 were reduced to less than half of their initial values. Decreasing The complexity of the network was significantly reduced and extremely sensitive.
>95% >98% 0 0 There were only isolated nodes in the network, and the network was in a state of paralysis.