[Purpose/significance] Traditional author co-citation analysis regards the domain development as a whole, ignoring that the rapid field changes in the research period would exert deviation impact on the knowledge domain mapping.[Method/process] To solve this problem, this paper proposed the publishing time variable to anatomize the vital turning as the alternation for each time snippet. Furthermore, we could visualize each period so as to compare their differences and conclude the transformation tendency of this domain by visualizing them separately. Specifically, this article selected vital turning points according to publishing ratios for each author annually, during which the time variation curve should be smoothed by the average theory.[Result/conclusion] The result points out that the knowledge domain map has altered relatively with the time transition. Additionally, the clustering effect has been improved in specific period and more details on the scientific community could be detected.
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