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Figure 4 | EPJ Data Science

Figure 4

From: Attention dynamics on the Chinese social media Sina Weibo during the COVID-19 pandemic

Figure 4

Rank diversity \(d(k)\) of the 48 ranks on the HSL before and after COVID-19 outbreak. (A) Rank diversity taking all hashtags in our observation period before the outbreak, approximately linear except the head and tail parts, with small fluctuations. (B) Rank diversity taking all hashtags after the outbreak, with strange points colored in red. A large gap occurs after the top 15th rank. (C) Rank diversity taking all non-COVID hashtags in the three periods after the outbreak, strong resemblances with (A). (D) Rank diversity taking all COVID-hashtags in the three periods after the outbreak. The result in period 1 is higher than period 2 and period 3, revealing a more dynamic change of the hashtags appeared on the HSL. The gap after rank 15 is more severe compared to (B)

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