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Greedy_Search_down.m
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Greedy_Search_down.m
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function [Best_Pipe,Pressure_BS,PipeCost ]=Greedy_Search_down(Best_Pipe)
global G_NYTP;
Possible_Dim=[ 0,36,48,60,72,84,96,108,120,132,144,156,168,180,192,204];
flagzero=0;
flagzero=1;
[Cost_BS,Pressure_BS,Length_Pipes,Head_Nodes]=Cost_Pip(Best_Pipe);
Sum_violation_BS = 0;
for ii=1:size(Pressure_BS ,2)
if Pressure_BS(ii)<0
Sum_violation_BS=Sum_violation_BS+ abs(Pressure_BS(ii));
end
end
Sum_Head_Violation_BS = 0;
HeadNode=Head_Nodes;
disp(['Pipe size=',num2str(Best_Pipe)])
disp(['Cost Pipe=',num2str(round( Cost_BS))])
disp(['Sum violation Pressure=',num2str(Sum_violation_BS)])
%disp(['Sum HEAD violation Pressure=',num2str( Sum_Head_Violation_BS)])
Sum_violation=Sum_violation_BS;
i=1;
while (Sum_violation ==0 )
Temp_Sol=Best_Pipe;
j=1;
while j<=size(Best_Pipe,2) % the number of pipe
Temp_Sol=Best_Pipe;
if Temp_Sol(j)==36
Temp_Sol(j)=0;
elseif Temp_Sol(j)==48
Temp_Sol(j)=36;
elseif Temp_Sol(j)==60
Temp_Sol(j)=48;
elseif Temp_Sol(j)==72
Temp_Sol(j)=60;
elseif Temp_Sol(j)==84
Temp_Sol(j)=72;
elseif Temp_Sol(j)==96
Temp_Sol(j)=84;
elseif Temp_Sol(j)==108
Temp_Sol(j)=96;
elseif Temp_Sol(j)==120
Temp_Sol(j)=108;
elseif Temp_Sol(j)==132
Temp_Sol(j)=120;
elseif Temp_Sol(j)==144
Temp_Sol(j)=132;
elseif Temp_Sol(j)==156
Temp_Sol(j)=144;
elseif Temp_Sol(j)==168
Temp_Sol(j)=156;
elseif Temp_Sol(j)==180
Temp_Sol(j)=168;
elseif Temp_Sol(j)==192
Temp_Sol(j)=180;
elseif Temp_Sol(j)==204
Temp_Sol(j)=192;
end
Solution(i,j).Pipe = Temp_Sol; % recording the solutions
[Solution(i,j).CostPipe,Solution(i,j).Pressure,Length_Pipes,Solution(i,j).Head]=Cost_Pip(Temp_Sol);
Table(j,1) = Solution(i,j).CostPipe;
Solution(i,j).Delta_Cost = abs(Solution(i,j).CostPipe-Cost_BS);
Table(j,2) = Solution(i,j).Delta_Cost;
Solution(i,j).Delta_Pre = 0;
Sum_violation = 0;
for ii=1:size(Pressure_BS ,2)
if Solution(i,j).Pressure (ii)<0
Sum_violation=Sum_violation+ Solution(i,j).Pressure (ii);
end
end
Sum_Head_Violation = 0;
Solution(i,j).Sum_violation = Sum_violation;
Table(j,3) = Solution(i,j).Sum_violation;
for ii=1:size(Pressure_BS ,2)
if Solution(i,j).Pressure(ii)>0 && Pressure_BS(ii)>0
Solution(i,j).Delta_Pre=Solution(i,j).Delta_Pre+ abs(Pressure_BS(ii)-Solution(i,j).Pressure(ii));
end
if Solution(i,j).Pressure(ii)<=0 && Pressure_BS(ii)>0
Solution(i,j).Delta_Pre=Solution(i,j).Delta_Pre+ abs(Solution(i,j).Pressure(ii));
end
Table(j,4) = Solution(i,j).Delta_Pre;
% if Solution(i,j).Pressure(ii)<0
% Sum_violation=Sum_violation+ Solution(i,j).Pressure(ii);
% end
end
% Solution(i,j).Sum_violation=Sum_violation;
if Solution(i,j).Delta_Pre==0 && Solution(i,j).Delta_Cost==0
Solution(i,j).rate_im=0;
elseif Solution(i,j).Delta_Pre==0
Solution(i,j).rate_im= 0;
else
Solution(i,j).rate_im= Solution(i,j).Delta_Cost/Solution(i,j).Delta_Pre ;
end
Table(j,5) = Solution(i,j).rate_im;
j=j+1;
end % end while
% selecting the feasible solutions
k=1;
for ii=1:size(Best_Pipe,2)
if Solution(i,ii).Sum_violation==0 && Solution(i,ii).Sum_HeadViolation==0 && Solution(i,ii).CostPipe < Cost_BS
Feasible(k)=Solution(i,ii);
k=k+1;
end
end
%finding the best candidate
if k==1
% i=i+1;
break
end
BestSol(i)=Feasible(1);
for i1=2:k-1
if Feasible(i1).rate_im > BestSol(i).rate_im
BestSol(i)=Feasible(i1);
end
end
Best_Pipe = BestSol(i).Pipe;
Pressure_BS = BestSol(i).Pressure;
Sum_violation_BS = BestSol(i).Sum_violation;
Cost_BS = BestSol(i).CostPipe;
Sum_Head_Violation_BS = BestSol(i).Sum_HeadViolation;
% disp(['Best solution Pipe size=',num2str(Best_Pipe)])
GS_Pipe(i,:)=Best_Pipe;
disp(['Best solution sum Pressure violation Node=',num2str(BestSol(i).Sum_violation)])
%disp(['Best solution sum Head violation Node=',num2str(BestSol(i).Sum_HeadViolation)])
disp(['The pipe cost=',num2str([BestSol(i).CostPipe])]);
disp(['Number of feasiable solutions=',num2str(size(Feasible,2))])
i=i+1;
clear Feasible
end % end while
PipeCost= Cost_BS;
Pipe.Best_Sols(cc,74:94) = Best_Pipe; % 52:72 77:97
Pipe.Best_Sols(cc,95) = Cost_BS;
Pipe.Best_Sols(cc,96) = Sum_violation_BS ;
% Pipe.Best_Sols(cc,97) = Sum_Head_Violation_BS;
% end % End if Pipe.Best_Sols(cc,171)~=0
% if flagzero==1
% clear Solution
% disp(['-----------------------',num2str(p),'------------------------------'])
% end
% end % for cc=1:size(Pipe.Best_Sols,1)
%save(['CMA_ES_Continuous_NYTP_Npop_200_Sigma_102_ex',num2str(p),'.mat'],'Pipe')
%end
% if thirdpart==1
% Best_Pipe=Dec_GS(BestSol)
% end
% Best_Pipe.Pipe
%save('Greedy_Search_sample7.mat','Solution')
% b=bar3(GS_Pipe,0.5);
% colorbar
% set(b,'LineStyle','none')
% for k = 1:length(b)
% zdata = b(k).ZData;
% b(k).CData = zdata;
% b(k).FaceColor = 'interp';
% end
disp('finished')
end % End Greedy function
%--------- ------------------------------------------------------------
function [Sum_Pipe_Cost,Pressure_Nodes,Length_Pipes,Head_Pressure_Nodes]=Cost_Pip(pipe)
Dim1=[180,180,180,180,180,180,132,132,180,204,204,204,204,204,204,72,72,60,60,60,72];
sizepipe=size(pipe,1);
if sizepipe==1
pipe=pipe';
end
Dim=[Dim1';pipe];
[Pressure_Nodes,Length_Pipes,Head_Pressure_Nodes]=Get_Pressure(Dim);
Sum_Pipe_Cost=0;
Sum_Violation=0;
for i=1:(size(Length_Pipes,2)/2) % computing the cost of all pipes
Pipe_Cost=(1.1 * Dim(21+i) ^ 1.24)* Length_Pipes(21+i);
Sum_Pipe_Cost = Sum_Pipe_Cost + Pipe_Cost;
end
end
%----------------------------------------------------------------------
function [Pressure_Nodes,Length_Pipes,Head_Pressure_Nodes]=Get_Pressure(Pipe)
[Pressure_Nodes,Length_Pipes,Head_Pressure_Nodes]=GetComputedHydraulic(Pipe);
end