Table 4.

Normalized centrality measures of technology keywords

Technology KeywordBetweenness(Normalized)Closeness(Normalized)Degree(Normalized)
Device, Control, Sensor, Signal, Speed> 0.60> 0.75> 0.80
Track, Rail, Circuit, Brake0.30–0.600.50–0.750.40–0.80
Manufacturing, Entrance, Test< 0.30< 0.50< 0.40

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