function [ Objective ] = fun(this, x )
%FUN Summary of this function goes here
%   Detailed explanation goes here
Objective=0;
SEVolt=x(1:this.Busnum);
SEVAngel=x(this.Busnum+1:2*this.Busnum);
rVolt=this.rVolt;
sigma=this.sigma;
VoltSigma=rVolt*sigma;
Objective=sum(((SEVolt-this.mVolt)./VoltSigma).^2);%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
% (SEBranchI-this.mBranchI).^2./(this.sigma^2)
% Objective=Objective+sum((SEBranchI-this.mBranchI).^2./(this.sigma^2));%%电流
%% 线路功率
rVAngel=this.rVAngel;
cmpV=rVolt.*exp(1j*rVAngel);
rBranchPQ=(cmpV(this.lineI)-cmpV(this.lineJ)).*conj( (cmpV(this.lineI)-cmpV(this.lineJ))./(this.lineR+1j*this.lineX) );
SEBranchPSigma=real(rBranchPQ)*sigma;
indBranchPS=find(real(rBranchPQ)>1e-5);%不考虑太小的数据，以免权重太大。例如除以0
SEBranchPSigma=SEBranchPSigma(indBranchPS);
SEBranchQSigma=imag(rBranchPQ)*sigma;
indBranchQS=find(imag(rBranchPQ)>1e-5);%不考虑太小的数据，以免权重太大。例如除以0
SEBranchQSigma=SEBranchQSigma(indBranchQS);
SEBranchP=real((cmpSEV(this.lineI)-cmpSEV(this.lineJ)).*conj(cmpSEBranchI));
SEBranchP=SEBranchP(indBranchPS);
SEBranchQ=imag((cmpSEV(this.lineI)-cmpSEV(this.lineJ)).*conj(cmpSEBranchI));
SEBranchQ=SEBranchQ(indBranchQS);
Objective=Objective+sum((SEBranchP-this.mBranchP).^2./(SEBranchPSigma.^2));
Objective=Objective+sum((SEBranchQ-this.mBranchQ).^2./(SEBranchQSigma.^2));
%% 变压器
newwordParameter=this.newwordParameter;
cmpY=this.cmpY;
transP=TransPower( newwordParameter,cmpY,SEVolt,SEVAngel );
Objective=Objective+sum((transP-this.mTransP).^2/(this.sigma^2));
transQ=TransReactivePower( newwordParameter,cmpY,SEVolt,SEVAngel );
% Objective=Objective+sum((transQ-this.mTransQ).^2/(this.sigma^2));
%% 0注入节点
PQ=diag(cmpSEV)*conj(this.cmpY*cmpSEV);
%% 发电机注入功率
% Objective=Objective+sum(((this.mPG(this.onlyPG)-real(PQ(this.onlyPG)))/this.sigma).^2);
% Objective=Objective+sum(((this.mQG(this.onlyQG)-imag(PQ(this.onlyQG)))./this.sigma).^2);
end