Bibliometric mining of research directions and trends for big data

Journal of Big Data

Table 5 s and final list of important research directions

Thesaurus keywords	Number of docs		Growth rate		Citation count		Sum of ranks
Thesaurus keywords	ta _i	Rank	gr _i	Rank	cc _i	Rank	Sum of ranks
1. Machine learning	13 716	0	37 469	1	189 329	0	1
2. DL and neural networks	10 820	3	34 059	2	138 018	5	10
3. Internet of things	9 045	5	24 434	4	154 725	1	10
4. Data mining	12 709	1	13 289	9	144 045	2	12
5. Cloud computing	11 323	2	12 634	11	142 712	3	16
6. Artificial intelligence	7 602	9	62 970	0	82 644	10	19
7. Healthcare	7 616	8	16 808	7	119 472	6	21
8. Security and privacy	10 165	4	12 300	12	101 813	7	23
9. Review	5 177	11	16 654	8	139 208	4	23
10. Manufacturing	4 707	12	18 734	6	92 269	9	27