Research Article
Construction of Multilevel Structure for Avian Influenza Virus System Based on Granular Computing
Table 2
Three signature viruses of the first level structure.
| Number | Virus number | Virus signature |
| A1 | 850 | A/Pekin duck/Singapore/F59/04/98(H5N2) | A2 | 58 | A/chicken/Tunisia/145/2012(H9N2) | A3 | 1 | A/American green-winged teal/Washington/1595750/2014(H5N1) | Sum | 909 | ā |
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