Research Article

Research Trends and Performance of IIoT Communication Network-Architectural Layers of Petrochemical Industry 4.0 for Coping with Circular Economy

Table 4

Scientific publication research guidelines.

(i) Scientific publication inclusion parameters:
 (a) Targets solely research-oriented scientific materials (only journal and conferences).
 (b) Articles published over the years 2007-2017.
 (c) Articles are searched, strike over evaluated PI4.0-CN/AL model.

(ii) Scientific publication exclusion parameters:
 (a) Eliminated the non-research-oriented publications, i.e., magazines, posters, PPTs, reports, thesis, synopsis, news reports, and short notes.
 (b) Articles are not in line with PI4.0-CN/AL model.
 (c) False scientific articles, which are not found in English.