TVOC models modification
Firstly, we require a confirmation that which pollutant source diffusion model provides the best fitness and expression. The existing researches has already compared and analyzed the fitness of different pollutant source diffusion models. Zhu et al. (2001) conducted experiment on different pollutant sources in active experiment module. He compared the fitness of first-order model and power law decay model, and discovered the decay coefficient using the first-order model to estimate is below the experiment outcome for a long period. On the other hand, the power law decay model turned out to be a better fit