微正则系综刚系综 Ps=T(p)=∑Im|p(E,)m D入(E,δ) ∑|nxn1∑∑Is(m,n) im,AIn,IE -nod J=I D(E,8) ∑|nn|∑ Im, lE-nos D、(E-m0o)1m(n=∑P(o)1m(n Dv cE,8 统计熵 S(E): =In[D(E, S) ITP{ } 1 1 { }[ ] 1 1 [ ] 1 ( ) | ( , ) | 1 | | ( , ) ( , ) 1 | | 1 ( , ) ( , ) | | ( ) | | ( , ) j j j E n j E n N S E j j m j N j j N n m n j N n m N n n n N Tr m E m n n m n D E n n D E D E n n n P n n D E              − − = + = + + =   =  =  − =    =         微正则系综 正则系综 ( ) : ln[ ( , )] N S E D E =  统计熵