shi_11: Shi equation of development rate as a function of temperature.
Description
Shi, P., Ge, F., Sun, Y., and Chen, C. (2011) A simple model for describing the effect of
temperature on insect developmental rate. Journal of Asia-Pacific Entomology 14(1): 15-20.
where rT is the development rate, T the temperature, T1 and T2 the conceptual
lower and upper developmental thresholds at which development rates equal zero,
and cc k1, and k2 constants.