求最可几分布: W=Π:(gNi/N) InW=>i(N,Ing;-N,InN;+N) (10) 令: f=InW=>(N;Ing;-N InN;+N)(11) y1=∑iN-N=0 (12) y2=∑iN∈:-E=0 (13) 拉格朗日条件极值: Of/ON;=Ing;-InN-N:/N;+1 =In(g;/N) 0y1/N:=1 50 0y2/N;=∈i (1 求最可几分布: W =∏i (gi Ni / Ni !) lnW=∑i (Ni lngi-Ni lnNi + Ni ) (10) 令: f =lnW=∑i (Ni lngi-Ni lnNi+ Ni ) (11) y1 = ∑i Ni-Ni = 0 (12) y2 = ∑i Ni∈i-E = 0 (13) 拉格朗日条件极值: ∂f/∂Ni=lngi-lnNi-Ni /Ni+1 =ln(gi /Ni ) (14) ∂y1 /∂Ni = 1 (15) ∂y2 /∂Ni = ∈i (16)