Partition the universe of S into fuzzy subsets low (L), sufficient (Su), good (G) and high (Hi), which are represented by evenly distributed triangular-type membership functions
Solar Irradiance Range 50 mW/cm2 is low and 200 mW/cm2
PIRC (2020). Fuzzy Triangle Membership Function for Solar Irradiation (https://www.mathworks.com/matlabcentral/fileexchange/69245-fuzzy-triangle-membership-function-for-solar-irradiation), MATLAB Central File Exchange. Retrieved .