Operations that Allow the Manipulation of Basic Belief Assignment(BBAs)Defined on Product Space

The theory of belief functions is a modeling language for representing and combining pieces of evidence to construct representations of our beliefs about certain aspects of the world. This study proposed to present several concepts and examples to combine a pair of belief functions into a single one. To get enough conditions to change ignorance when independent pieces of evidence are combined with the help of diverse rules. We can evaluate combining rules as depressing or encouraging depending on the sign of the change in ignorance after they are applied. This work has efficient to implement and used successfully in a diversity of applications, including classification, pattern recognition, and sensor fusion.