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Local authorities and public services Description
Further explanation of this example: 'Applications of optimization with Xpress-MP', Chapter 15: Local authorities and public services
Source Files
Data Files
j1water.mos (!****************************************************** Mosel Example Problems ====================== file j1water.mos ```````````````` Water conveyance/water supply management (c) 2008 Fair Isaac Corporation author: S. Heipcke, Mar. 2002 *******************************************************!) model "J-1 Water supply" uses "mmxprs" declarations ARCS: range ! Set of arcs NODES=1..12 PIPE: array(ARCS,1..2) of integer ! Definition of arcs (= pipes) CAP: array(ARCS) of integer ! Capacity of arcs SOURCE,SINK: integer ! Number of source and sink nodes end-declarations initializations from 'j1water.dat' PIPE CAP SOURCE SINK end-initializations finalize(ARCS) declarations flow: array(ARCS) of mpvar ! Flow on arcs end-declarations ! Objective: total flow TotalFlow:= sum(a in ARCS | PIPE(a,2)=SINK) flow(a) ! Flow balances in nodes forall(n in NODES | n<>SOURCE and n<>SINK) sum(a in ARCS | PIPE(a,1)=n) flow(a) = sum(a in ARCS | PIPE(a,2)=n) flow(a) ! Capacity limits forall(a in ARCS) flow(a) <= CAP(a) ! Solve the problem maximize(TotalFlow) ! Solution printing writeln("Total flow: ", getobjval) forall(a in ARCS) writeln(PIPE(a,1), " -> ", PIPE(a,2), ": ", getsol(flow(a))) end-model | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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