Page 129 - Journal of Library Science in China, Vol.45, 2019

128 Journal of Library Science in China, Vol.11, 2019

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Figure 4. Distribution of books’ citation lengths in different disciplines 4QPSU TDJFODF

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Figure 5. Distribution of books’ citation length intervals in different disciplines
It can be seen from Figure 4, the citation lengths of law and medicine, and the citation lengths of
computer science and sports are relatively similar, while the citation lengths in literature are higher
than in other disciplines. Figure 5 shows that the citation lengths in all five disciplines reach the
peaks in the range of “40-60”, accounting for about 23%. Then, the number of citation contents
gradually decline. The overall trend shows that lengths of most citation contents are distributed in
the range of “20-160”.
3.4 Results analysis on citation sentiments
In this study, we found that there are obvious differences in the proportions of different sentiment
categories (most citation sentiments are neutral), which is similar to the distributions of sentiment
categories in the research of Abu-Jbara. Hence, we used the method for analyzing citation polarities
by Abu-Jbara, and analyzed the sentiments of citation content based on the two-step classification