Comparison of transport equation forms.

The transport rate of each compound was modeled using a differential equation of the form of either Equation (2) or Equation (3). The latter equation form, which is a piecewise version of the former, was necessary because the uptake patterns of several nutrients qualitatively change during growth. Columns 2 and 3 above list the best (lowest) residual error values for Equation (2) and Equation (3), respectively. The rightmost column indicates how much the error is reduced by using the piecewise version over the simpler form.针对每种化合物的转运速率，本研究采用形如公式(2)或公式(3)的微分方程进行建模。后者为前者的分段形式，其必要性在于部分营养物质的摄取模式在生长过程中会发生定性变化。上文的第2列与第3列分别列出了公式(2)与公式(3)对应的最优（最小）残差误差值。最右侧列则展示了相较于简洁形式，使用分段形式后误差的降低幅度。