2.Basic probability allocation

Basic Probability Allocation (BPA) is a function known as E.g. (1)m function. *<sup>m</sup>* : <sup>2</sup><sup>Θ</sup> ! ½ � 0, 1,

And it satisfied:

$$m(\Phi) = 0; \sum\_{A \subseteq \Phi} m(A) = 1 \tag{1}$$

When an evidence is constructed, each possible hypothesis or hypothesis combination within the recognition framework should be assigned with a trust level between [0, 1], and the sum of the trust levels of all hypotheses or hypothetical combinations should equal 1.
