From: Sensitivity and mathematical model analysis on secondhand smoking tobacco
No | Variables/parameters | Description | Value |
---|---|---|---|
1 | P | The number people who have a risk of smoking | \(P\ge 0\) |
2 | S | The number people who are smoking tobacco | \(S\ge 0\) |
3 | Q | The number of people who have stopped smoking | \(Q\ge 0\) |
4 | \(\alpha\) | The number of healthy people who become at risk of active smokers | \(\alpha >0\) |
5 | \(\mu\) | The natural death rate over the population | \(0<\mu <1\) |
6 | \(\nu\) | The death rate of secondhand smoker because of being secondhand smoker | \(0\le \nu \le 1\) |
7 | \(\kappa\) | The death rate of smoker by smoking tobacco | \(0\le \kappa \le 1\) |
8 | \(\eta\) | The death rate of quit because of smoking habit before joining the state Q | \(0\le \eta \le 1\) |
9 | \(\sigma\) | The exit rate of secondhand smoker to the health people | \(0\le \sigma \le 1\) |
10 | \(\xi\) | The exit rate of people who have stopped smoking to the healthy population | \(0\le \xi \le 1\) |
11 | \(\lambda\) | Infection rate from P to S | \(0< \lambda \le 1\) |
12 | \(\zeta\) | Exit rate from S to Q | \(0\le \zeta \le 1\) |
13 | \(\delta\) | Infection rate from Q to S | \(0< \nu \le 1\) |