the theories of fuzziness and randomness are used to solve the problems in the absolute value sythetical method for ey1 and the square root sythetical method for ey2. First
the approximate boundary between ey1 and ey2 is proposed. Second
the overestimation of ey1 and underestimation of ey2 are modified. The modified ey1 and ey2 have the advantages of simplicity
practicality
less constrains
and vast applications. And their accuracy can also meet the requirements in general engineering measureme...