Table 2 The parameter description of SEIR Model.

From: Dynamic analysis and optimal control of knowledge diffusion model in regional innovation ecosystem under digitalization

Parameter

Description

S(t)

The number of innovative knowledge holders at the time t.

E(t)

The number of potential knowledge diffusion subjects at the time t.

I(t)

The number of innovative subjects that diffuse existing knowledge at the time t.

R(t)

The number of knowledge immunization innovation subject at the time t.

\(\alpha\)

Knowledge diffusion rate.

\(\theta\)

The ratio of potential knowledge diffusion agents with digital transmission capability to the number of

 

knowledge diffusion agents.

\(\varepsilon\)

Transition probability from state E to state I.

\(\omega\)

Transition probability from state E to state R.

\({\gamma }\)

Transition probability from state I to state R.

\(\mu\)

Removal rate per unit time.

B

The number of immigrants in the regional innovation ecosystem per unit time.