Abstract
Uncertainty theory, as a mathematical tool to rationally handle degrees of belief of human beings, has been widely applied in science and engineering. As a basic component of uncertainty theory, uncertainty distribution is a carrier to describe the characterization of an uncertain variable. Moreover, inverse uncertainty distribution provides an easy way to calculate the functions of uncertain variables as well as their expected value. This paper mainly provides the formulas to calculate the expected value, variance, moments and entropy of lognormal uncertain variable. Besides, some operational laws of lognormal uncertain variables are proved.
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