Fig. 1: Identification process for relevant studies.
From: Mechanical modeling of friction phenomena in social systems based on friction force
The figure shows the selective process of materials used for qualitative analysis. The first step was the retrieval process of both Chinese and English literatures, the second process was the screening process. CNKI China National Knowledge Infrastructure, WOS Web of Science, TS topic word, SCI Science Citation Index Expanded, SSCI Social Sciences Citation Index.
