考虑网络无耗互易条件，即 IS.=S. S.=S. (g。+p)(0t0)=±r r-S.-5.S.em+5.S.se 1-SSe） S.-SSe+(1-S)5② 1-S考虑网络无耗互易条件，即 ( ) ( ) ï î ï í ì + - + = ± = = j12 j21 j11 j22 p 12 21 11 22 S S S S ( ) ( ) (j j q ) q j j q q q q 2 2 11 2 11 2 11 2 22 2 11 11 2 11 22 2 12 21 11 2 22 2 11 11 11 22 12 21 1 1 1 + - - + - - - - - - + - = - - + G = j j j j j j in S e S S S e S S e S S e S S S e S S S e