double servRate2 = 1 / servTime2;
double think_time = 0.0; //no delay
double term_rate = 1 / think_time;
DelayPar[0] = new ExponentialPar(term_rate);
serverPar1[0] = new ExponentialPar(servRate1);
serverPar2[0] = new ExponentialPar(servRate2);
} catch (IncorrectDistributionParameterException e) {
e.printStackTrace();
}