Development Status and Hotspot Visualized Analysis of Autonomous Vehicles Based on CiteSpace

Table 6

Frequency of keywords for autonomous driving vehicles.

Rank	Keywords	Number	Centrality
1	Model	134	0.19
2	Design	124	0.21
3	System	123	0.17
4	Automated vehicle	111	0.13
5	Autonomous vehicle	103	0.05
6	Adaptive cruise control	73	0.06
7	Automated driving	69	0.08
8	Optimization	64	0.13
9	Automated guided vehicle	53	0.09
10	Algorithm	51	0.14
11	Safety	49	0.02
12	Time	46	0.08
13	Performance	44	0.06
14	Simulation	42	0.11
15	Impact	42	0.1