Читать книгу Intelligent Data Analytics for Terror Threat Prediction - Группа авторов - Страница 40

In SIR model once a person recovered from disease he/she remains in same state in future. In general once a person is cured from any disease there is chance that they may be reinfected with same decease in future, which is ignored in SIR model. SIRS model addresses this problem where once a person is infected and have recovered by having immunity or medical treatment, they couldn’t be in same recovered state in future. After recovery, there is possibility that again infected by same decease [16].

In social networks, once a rumor is diffused and received by any user, if believed, user is infected; otherwise if fact is known about rumor, user recovers by ignoring or not passing to neighbors. There is possibility that this recovered node again will be reinfected in the future on social networks. For further details see Figure 1.11.

All these diffusion models are explained in Ref. [41]. There are independent cascade models to find rumor sources by analyzing network diffusion in reverse direction [42].

Figure 1.11 SIRS model.