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Abstract and Applied Analysis
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Abstract and Applied Analysis
/
2014
/
Article
/
Fig 1
/
Research Article
SVEIRS: A New Epidemic Disease Model with Time Delays and Impulsive Effects
Figure 1
The results of numerical simulation on the threshold values
, where
,
.
(a)
Time series of
,
, and
. The disease will be permanent
(b)
Phase portrait of
,
of the system (
4
)
(c)
Phase portrait of
,
of the system (
4
)
(d)
Phase portrait of
,
, and
of the system (
4
)