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Table 1 The parameter values of model (2)

From: Hyperchaotic behaviors, optimal control, and synchronization of a nonautonomous cardiac conduction system

Parameter

Description

Value

\(\alpha _{1}\)

Limit cycle in the phase portrait of \((f_{1},f_{2})\)

5

\(\alpha _{2}\)

Limit cycle in the phase portrait of \((f_{3},f_{4})\)

4.75

\(\alpha _{3}\)

Limit cycle in the phase portrait of \((f_{5},f_{6})\)

4.75

\(\beta _{1}\)

Frequency of SA node

6

\(\beta _{2}\)

Frequency of AV node

30

\(\beta _{3}\)

Frequency of His–Purkinje complex

1.7

\(\gamma _{1}\)

Modeling constant coefficient

5

\(\gamma _{2}\)

Modeling constant coefficient

6

\(\gamma _{3}\)

Modeling constant coefficient

4

\(r_{13}\)

Coupling coefficient between SA node and AV node

2

\(r_{15}\)

Coupling coefficient between SA node and His–Purkinje complex

3

\(r_{31}\)

Coupling coefficient between AV node and SA node

1

\(r_{35}\)

Coupling coefficient between AV node and His–Purkinje complex

2

\(r_{51}\)

Coupling coefficient between His–Purkinje complex and SA node

7

\(r_{53}\)

Coupling coefficient between His–Purkinje complex and AV node

5