H(q) = \frac{\sum_{k=0}^m a_k \, (q/q_\mathrm{max})^k}{\sum_{k=0}^m} b_k \, (q/q_\mathrm{max})^k} =
\frac{a_0 + a_1 \cdot (q/q_\mathrm{max}) + a_2 \cdot (q/q_\mathrm{max})^2 + ... + a_m \cdot (q/q_\mathrm{max})^m}
{b_0 + b_1 \cdot (q/q_\mathrm{max}) + b_2 \cdot (q/q_\mathrm{max})^2 + ... + b_m \cdot (q/q_\mathrm{max})^m} | 