Threestep model

According to previous work $^{\mbox{\scriptsize\citep{BIOREACTOR2003,THREESTEP2003,BIOPROCESS2003}}}$, SRES seems better than other methods and be able to generate good result. Here the same model is used to repeat the work by Banga et al. $^{\mbox{\scriptsize\citep{THREESTEP2003}}}$, in which Matlab (http://www.mathworks.com) was used. And in this section, Matlab is replaced with libSRES which is written in C language.