Symbol	Explain
$\mathsf{\Theta }$	Frame of discernment
m(A)	Basic probability assignment function
bel(A)	Belief function, which is based on the basic probability assignment in the FoD
pl(A)	Plausibility function, which is based on the basic probability assignment in the FoD
$d_{ij}$	Distance between two evidences, mi and mj
D	A matrix of 2N×2N
Sim	Similarity matrix of evidence
${\alpha }_i$	Calibration coefficient, which is used to correct the original matrix
K	Normalized constant
F	Linear weighting of the mass function and weight of each indicator
k	Number of experts in each group
n	Number of expert groups hired to participate in the review
k	Number of experts in each group
n	Number of expert groups hired to participate in the review
G	Ranking value given by the experts
N	Index value after standardization conversion
$q_{ij}$	Membership degree
n	Number of indicators
${\omega }_j$	Index weight coefficient
Ex	Expectation, that is the central value of the spatial distribution of cloud droplets in the universe
En	Entropy, that is a measure of the ambiguity of a qualitative concept, reflecting the range of cloud drip values that can be accepted by the concept space
He	Super-entropy, that is a measure of the uncertainty of entropy, reflecting the degree of dispersion of the cloud droplets and the thickness of the cloud.
◦	Process of cloud synthesis
$W_i$	Weight of the child cloud