function [ Objective ] = fun(this, x )
%FUN Summary of this function goes here
%   Detailed explanation goes here
    SEVolt=x(1:this.Busnum);
    SEVAngel=x(this.Busnum+1:2*this.Busnum);
    Objective=(SEVolt-this.mVolt)'*(1./this.sigma^2*eye(length(this.mVolt)))*(SEVolt-this.mVolt);%电压
    %% 支路电流
    cmpSEV=SEVolt.*exp(1j*SEVAngel); %复数电压
    cmpSEBranchI=(cmpSEV(this.lineI)-cmpSEV(this.lineJ))./(this.lineR+1j*this.lineX);%复数支路电流
    SEBranchI=abs(cmpSEBranchI);% 支路电流幅值
    Objective=Objective+(SEBranchI-this.mBranchI)'*(1./this.sigma^2*eye(length(this.mBranchI)))*(SEBranchI-this.mBranchI);%%电流
    %% 支路功率
    SEBranchP=real((cmpSEV(this.lineI)-cmpSEV(this.lineJ)).*conj(SEBranchI));
    SEBranchQ=imag((cmpSEV(this.lineI)-cmpSEV(this.lineJ)).*conj(SEBranchI));
    Objective=Objective+(SEBranchP-this.mBranchP)'*(1./this.sigma^2*eye(length(this.mBranchP)))*(SEBranchP-this.mBranchP);
    Objective=Objective+(SEBranchQ-this.mBranchQ)'*(1./this.sigma^2*eye(length(this.mBranchQ)))*(SEBranchQ-this.mBranchQ);
%     %% 0注入节点
    PQ=diag(cmpSEV)*conj(this.cmpY*cmpSEV);
%     zeroInjP=real(PQ(this.zerosInjectionIndex));%% 0注入节点
%     zeroInjQ=imag(PQ(this.zerosInjectionIndex));%% 0注入节点
    %% 发电机注入功率
    Objective=Objective+(this.PG(this.onlyPG)-real(PQ(this.onlyPG)))'*(1./this.sigma^2*eye(length(this.PG(this.onlyPG))))*(this.PG(this.onlyPG)-real(PQ(this.onlyPG)));
    Objective=Objective+(this.QG(this.onlyQG)-imag(PQ(this.onlyQG)))'*(1./this.sigma^2*eye(length (this.QG(this.onlyQG))))*(this.QG(this.onlyQG)-imag(PQ(this.onlyQG)));
end