  The existing fractional grey prediction models mainly use discrete
fractional-order difference and accumulation, but in the actual modeling,
continuous fractional-order calculus has been proved to have many excellent
properties, such as hereditary. Now there are grey models established with
continuous fractional-order calculus method, and they have achieved good
results. However, the models are very complicated in the calculation and are
not conducive to the actual application. In order to further simplify and
improve the grey prediction models with continuous fractional-order derivative,
we propose a simple and effective grey model based on conformable fractional
derivatives in this paper, and two practical cases are used to demonstrate the
validity of the proposed model.
