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xm@W l} QO lQLDt Cq}yUD @ C=R}yHD =tvH Ov = uD v QOsjie.journals.sharif.edu/article_5237_b14313c08963... · p}yUD |@=}u=mt p =Ut R= xm lQLDt p}yUD |@=}u=mt |xr Ut QO "s}yO|t w p}yUD

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    p=Ut R= CU= pt=a Q}e Ovi=OB QO |@=}u=mt pwY= R= |m} xm Cq}yUD |R=UlQLDtuOQmxv}tm |=Q@ pOt wO Q=DWwv u}= QO "CU= xOW KQ]t |@=}u=mt QO xOWKQ]t u} wv

    xOW xO=O xaUwD w |L=Q] lQLDt Cq}yUD w u=} QDWt R= xDUw}B |}xm@W QO =y|}=Hx@=HQDt=Q=B 'u=} QDWt w Cq}yUD lQLD *Qou=}@ |=yQ}eDt h} QaD ut[ pOt wO Qy QO "CU=xOW xDiQo Q_v QO xm@W Cq}yUD |=Q@ C}iQ_ QDt=Q=B w 'u=} QDWt R= l} Qy |=Q@ =[=kD

    R= xO=iDU= =@ xOWx=Q= |=ypOt "CU= xOW xOwRi= �C}ty=� uRw QDt=Q=B swO pOt QO "CU=|iQat =yu; R= |t}UQD w |OOa |=yp=Ft TBU 'xOW |HvUQ=@Da= GAMS Q=Ri=sQv

    'lQLDt l}Uqm p=Ut x@ C@Uv �pw= pOt xaUwD� swO pOt |Qw;wv "CU= xOW"CU= u=tR Q}eDt uDiQo Q_v QO uwO@ \=kv CmQL x@ pOt pL |oDU@=w

    [email protected]@gmail.com

    Q}e Ovi=OB 'xDUw}B |xm@W 'lQLDt u=} QDWt 'lQLDt Cq}yUD %|O}rm u=oS=w"pt=a

    xtOkt "1|}=Hx@=H|xrUt OwW|tKQ]t|@=}u=mtp=Ut|=DU=Q QO xm|v} wvp=Ut R=nvy=ty |DmQL xOvQ}oQ@ QO |}=Hx@=H p=Ut |rm Qw]x@ "CU= lQLDt Cq}yUDxm |r=L QO 'CU= xm@W QO |rm |iOy x@ |@=}CUO |=Q@

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    %OwW|t h} QaD u}vJ �lQLDt k-median� lQLDt k-centre|xr}Uwx@ xm lQLDt ,=QtDUt x]kv n R= S = fp1; p2; :::; png xawtHt l}=ygi; xm |}=H �� OvwW|t XNWt fg1; g2; :::; gng u}at |}xa]k `@=wDxDUw}B `@=wD "CU= xOW xO=O �� OvQ=ov|tRd x@ =Q [0; T ] |v=tR xR=@ 1 � i � nu=tR Qy QO T=U= u; Q@ w xOWu}}aD fi : [0; T ]! Rd =yu; QO xm f1; f2; :::; fkg1(t); :::; gn(t) |=yu=mt QO \=kv |=Q@ f1(t); :::; fk(t) \=kv t 2 [0; T ]|@=}u=mt u}kkLt "OvyO|t p}mWD �lQLDt k-median� lQLDt k-centrel}"Ov=xO=O Q=Qk |UQQ@ OQwt OvQ=O CmQL R}v u=} QDWt xm |v=tR '=Q lQLDt Cq}yUDj}kO w |@} QkD |Q=Oxov |=Q@ Ot;Q=m |=ysD} Qwor= w u}}=B OwOL =yu; X=N Qw]x@xLiY l} QO lQLDt \=kv R= |}xawtHt |=Q@ 1-median w 1-centre R=1V@ \UwD xOW|iQat lQLDt ?wJQ=J Q@ |vD@t u=v; |=ysD} Qwor= "Ov=xOQm x=Q=|@=}u=mt =@ \@DQt p=Ut |xar=]t w |iQat u=v; hOy [4]"CU= Vv=Q=mty wd |=[i QO lQLDt ,=QtDUt \=kv R= |}xawtHt |=Q@ xm CU= |mQLDt Cq}yUDw k-median |Q=Oxov w ^iL "OwW|t xDiQo Q=m x@ CU= d � 1 u; QO xm |Oa@[5]"CU= |r=Ut u}vJ R= |}=yp=Ft 'Lp l} QDt QO lQLDt \=kv |=Q@ k-centre|a}Uw OQ@ xm u=tR u; �� s}U uwO@ |]=@DQ= |=yxm@W uwJ |OQ=wt QO Qt= u}=|ov=N |=yuirD |xv}tR QO |v=UQCtON |=Q@ u=} QDWt |xty |xOvQ}oQ@ QO O}=@x@=Wt p=Ut |xv}tR QO xm CU= |}=yp=Ft R= |m} =yvD u}= "OQ=O OQ@ Q=m �� OW=@u}}aD QO p=Ut u}= Qo}O OQ@ Q=m "OwW|t KQ]t '\=kv R= lQLDt sDU}U l} QOu}= R= s=OmQy "CU= p}@twD= O}rwD |xv=NQ=m l} QO |Q=mWwH \=@ Q l} pLt

    "CU= xHwD p@=k |@ QHD w |Q_v ^=Lrx@ p=UtR= |O}OH |xawtHt T=U=Q@ u=Q=mty w p=oU \UwD xOW u=}@ |=ysD} Qwor=s=Hv= xr=kt xm lQLDt |xO=O Q=DN=U Q@ |LQW xt=O= QO "CU= xO=O |=yQ=DN=U

    "s}vm|t x=Q= CU= xOw@ T=U= u; Q@ Vv=Q=mty w p=oU \UwD xOW

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    'CU= OwyWt ,qt=m u=WOQ@ Q=m xm xOW x=Q= |=ypOt |xv}tR QO Qo}O p=FtxDiQo Q_v QO Q=m u}= |=Q@ xm CU= |}=ywQOwN \UwD =yxO=H QO |v=UQO=Ot=u=wvax@ CU= hrDNt |=yQ}Ut R= pmWDt xm =Q |}xO=H |xm@W =t Qo = "Ov=xOW|DQ=@ax@ =} =y=ohkwD u=wD|t 's} Q}o Q_v QO xOW h} QaD u; |wQ Q@ pOt xm |}xm@W|}=yxQo u=wvax@ 'OvQ=O OwHw xm@W u}= R= Q}Ut l} pw] QO xm =Q |}=ynv}mQ=BQO u=UQO=Ot= |=ywQOwN p=Ft u}= QO xm � Cq}yUD w u=} QDWt xm CiQo Q_v QOp=Ft u}= |rY= Cw=iD =t= 'Ovvm CmQL =yu; CtU x@ Ovv=wD|t �Ov=xOW xDiQo Q_vOv=CmQL p=L QO ,=t=O u=} QDWt |}xO=H |xm@W QO xm CU= u; QO =t |=ypOt =@R}v u=UQO=Ot= |=ywQOwN "OvwW|t hkwDt nv}mQ=B |=yxQo QO R=}v CQwY QO wQO 'O=Ot= x@ OvtR=}v |QDWt xOy=Wt CQwY QO =D Ov=CmQL QO xO=H pw] QO

    "OvwW hkwDt =ynv}mQ=B

    pOt C=}RH KQW "5x@ QO=k xm |Dq}yUD w u=} QDWt R= pmWDt |}xm@W =t pOt QO OW xQ=W= xm u=vJw u=} QDWt xm CU= |i=Qo `k=w QO xm@W u}= "s} Q}o|t Q_v QO Ov=CmQL w |}=Hx@=H\=@DQ= Qo}Om} x@ u; |=yp=}\UwD =yu; |xty w Ov=xDiQo Q=Qk u; TwQ QO Cq}yUD"OQ=Ov OwHw xm@W QO |}xrwR}= w =yvD T-=Q I}y xm@W uOw@ xDUw}B p}rOx@ w 'Ov@=}|txm |}=yQ}eDt h} QaD R= TB 'pOt |rm Cr=L QO xOW KQ]t OQ=wt |x}rm Q@ xwqaQDt=Q=B uDiQo Q_v QO w CU= xm@W QO p}yUD =} |QDWt Qy CmQL |xOvyOu=WvxQo wO Qy u}@ |xrY=i QDt=Q=B R}v w xm@W QO OwHwt u=} QDWt R= l} Qy |=Q@ =[=kD"CU= xOW xDiQo Q_v QO C}iQ_ QDt=Q=B Cq}yUD R= l} Qy |=Q@ 'xm@W QO OwHwtGQ=N 8�UFLP� C}iQ_ uwO@ Cq}yUD |@=}u=mt Cr=L R= =Q pOt QDt=Q=B u}=QDt=Q=B u}= uDiQo Q_v QO =@ "Ovm|t OwOLtVDq}yUD |=yC}iQ_\UwD =Q u; w xOQmw u=} QDWt |=y=[=kD ẁtHt R= Cq}yUD |=yC}iQ_ ẁtHt uOw@ QDnQR@ ZQiu=wvax@ Cq}yUD |=yC}iQ_ ẁtHt R= =y=[=kD ẁtHt Rw=HD sOa s=Rr= |DQ=@ax@xrUt |=yC}OwOLt x@ xrUt pL |=[i uOw@|vOW Qw_vtx@ C}OwOLt l}=yvD p}yUD w |QDWt Qy xm Ovvm|t u=}@ xrUt |=yC}OwOLt Qo}O "OwW|t xOwRi=QO |}=Hx@=H l} =yvD |DQ=@ax@ =} Ovvm CmQL Ovv=wD|t OYkt xQo l} CtU x@u=} QDWt |=y|}=Hx@=H ẁtHt uOQm xv}tm hOy =@ pOt TBU "OvW=@ xDW=O xm@W

    "OwW|t pL Cq}yUD w

    pOt |[=} Q |Ov@pwtQi "1"5=yT}Ov= "1"1"5

    Q@ =yxQo "(v = 1; 2; :::) |xm@W QO OwHwt |=yxQo |xawtHt |xOvQ=tW %v"Ov=xOW h} QaD V |xawtHt |wQ

    "(i = 1; 2; 3; :::) |xm@W QO xOWh} QaD u=} QDWt |xawtHt |xOvQ=tW %i"Ov=xOW h} QaD C |xawtHt |wQ Q@ u=} QDWt

    "(j = 1; 2; 3; :::) |xm@W QO xOW h} QaD Cq}yUD |xawtHt |xOvQ=tW %j"Ov=xOW h} QaD F |xawtHt |wQ Q@ Cq}yUD

    KDS |=yQ=}at Qo}O R= uOw@ 5�Ot;Q=m� "OwW|t xO}t=v 4woMU=B OR=U|t xOQw;Q@O}=@v OvwW|t VR=OQB KDS |xr}Uwx@ xm |}=yO=O} wQ O=OaD xm Qw_vt u}= x@ 'CU=x@ KDS 6|oOQWi "OW=@ |Ov@ Qm}B `@=D OwN QO |@}mQD C=Q}}eD O=OaD R= QDnQR@CmQL |oO}J}B Q_v R= u=tR OL=w Qy QO p=ai |=y|y=wo O=OaD xm CU= swyit u}=l} xm CU= swyit u}= x@ R}v KDS 7uOw@ |rLt "Ov=|]N ,=@} QkD lQLDt \=kvQF= =y|y=wo R= |tm O=OaD Q@ \ki x]kv Qy |=Q@ xOWRwQx@ �CmQL� Ct} Ra |xt=vQ@

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    pOt |rm KQW "4|xawtHt =@ l} QDt |=[i QO CNQO l} 'QDTwtrt |DQ=@ax@ =} 'h=Qo l} Qo ==} =yT-=Q 's} Q}o@ Q_v QO xDUw}B |}xm@W QO =Q u; x@ XDNt |=yp=} w =yT-=Qu=wvax@ Cq}yUD w u=} QDWt w 'xawtHt l} u=wvax@ xm@W u}= QO =yxQo |DQ=@ax@xDiQo Q_v QO �� OvDU}v Qo}Om} ptmt ,=twRr xm �� xawtHt u}= |=yxawtHtQ} Rh=Qo QO ẁQW |x]kv l} x@ p}yUD w |QDWt Qy xm CU= u; Q@ ZQi "Ov=xOWp}yUD w |QDWt Qy |=Q@ OYkt xQo l} uDi=} hOy w OW=@ xOW xO=O X}YNDp}yUD OvJ =} l} OYkt xm O@=} X}YND |}xQo x@ |QDWt Qy xm |}xvwox@ CU=

    "OW=@|=yxQo R= l} Qy QO p}yUD Qy w |QDWt Qy '=ypOt u}= QO QDxO=U u=}@x@VR=}v uOQw;Q@ |=Q@ Oy=wN@ A |QDWt p=Ft |=Q@ xm |v=tR =D Ov=xOW QkDUt xm@Wu}vJty "Ovm CmQL xOW QkDUt u; QO p}yUD OvJ =} l} xm B xQo CtU x@xm |v=tR =D xDiQo Q=Qk CU= h=Qo TwQ R= |m} xm OwN x=o}=H QO C p}yUD ,qFt'Ov=xOW `k=w u; QO |Q}oT} wQU Qw_vtx@ |QDWt OvJ =} l} xm D xQo CtU x@wO Qy Ovv=wD|t C p}yUD w A |QDWt xm CU= QmP p@=k xDmv u}= "Ovm CmQL"Ovvm CmQL E Ovv=t xQo l} CtU x@ |v=UQCtON w |Q}oT} wQU Qw_vtx@|yOT} wQU Qw_vtx@ p}yUD l} x@ |QDWt l} X}YND =ypOt u}= QO u}=Q@=v@Q@ |D}OwOLt =Hv}= QO "OQ}o|t s=Hv= p}yUD =} |QDWt CmQL CQwYQO u; x@=yvD Cq}yUD R= l} Qy =} u=} QDWt R= s=OmQy =t= 'OQ=Ov OwHw Cq}yUD CmQLxDW=O u=WQ_v OQwt OYkt CtU x@ u=WOwN pLt R= |}=Hx@=H l} Ovv=wD|t|}=Hx@=H l} QO =yvD =} w CmQL l} QO =yvD |QDWt xQo Qy Qo}O CQ=@ax@ "OvW=@CmQL l} QO =yvD p}yUD xQo Qy u}vJty "OwW|t |yOT} wQU 'Qo}O |}xQo x@O}=@ "O@=}|t p=kDv= |yOT} wQU Qw_vtx@ 'Qo}O |}xQo CtU x@ |}=Hx@=H l} =} wu}OvJ =} l} OYkt xm xQo l} QO xOW QkDUt u=} QDWt O=OaD xm CW=O xHwD"OW=@ |w=Ut QFm =OL =} QDsm xQo u; QO QkDUt Cq}yUD C}iQ_ R= O}=@ xOw@ p}yUDxm OQm |krD u=wD|t R}v CmQL |xv} Ry u=wvax@ =Q =y|}=Hx@=H xOWx=Q= pOt QOQDy@ lQO Qw_vtx@ "s}vm xv}tm xv}y@ Cr=L QO w s}yO Vy=m =Q =yu; s}Wwm|t"s} Q}o|t Q_v QO Cq}yUD w u=} QDWt \UwD xOW |] Ci=Ut =Q =y|}=Hx@=H =th} QaD l} QDt |=[i l} QO |UO}rk= |xrY=i =Q xOW xDiQo Q_v QO |=yCi=Utp=} l} Qo}O xQo x@ xQo Qy R= xm CU= swyit u}= x@ xm@W uOw@ xDUw}B "s}vm|t

    "OQ=Ov OwHw xm@W u}= QO |}=yvD xQo =} T-=Q I}y w OQ=O OwHwl} QO =yATM R= |}xm@W x@ u=wD|t pOt u}= |OQ@ Q=m |=yp=Ft xrtHR=QO |v=UQCtON Qw_vtx@ xm |]=kv QO =Q =yATM "OQm xQ=W= |QyW |xk]vtxaH=QtQB |=ypLt x@ =yATM |}=Hx@=H u=mt= "OvyO|t Q=Qk xOW xDiQo Q_vs} Q}o|t Q_v QO lQLDt Cq}yUD u=wvax@ =Q =yATM u}= =t |DQ=@ax@ "OQ=O OwHw

    79

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    %CU= CtUkwO R= pmWDt w CU= |R=Uxv}tm CQwYx@ hOy `@=DMinimize

    Xi2C

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    xivDidiv +Xj2F

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    pw= VN@ "Ovm xv}tm xm@W u}= QO =Q =y|}=Hx@=H xm CU= OOYQO hOy `@=D u}=xOW s=Hv= |=y|}=Hx@=H |DQ=@ax@ =} xOW|] |=yCi=Ut pm x@ \w@ Qt hOy `@=DVN@ u}= "Ovvm|t CmQL u=WQ_v OQwt |=yxQo CtU x@ xm CU= |v=} QDWt \UwD|QDWt QOkQy Qo}O CQ=@ax@ "O@=}|t uRw u=} QDWt |=y=[=kD \UwD hOy `@=D R=QDW}@ =[=kD u; uOQw;Q@ Qw_vtx@ u; |}=Hx@=H |xv} Ry OW=@ |QDW}@ |=[=kD |=Q=Oxm@W QO Cq}yUD |}=Hx@=H pm ẁtHt x@ \w@ Qt `@=D swO VN@ "OW Oy=wNxOW |] |=yCi=Ut pm Q=Okt C}=yv QO hOy `@=D VN@ wO u}= `tH "CU=Q_v QO u}vJ pOt |=yC}OwOLt "OR=U|t XNWt =Q Cq}yUD w u=} QDWt \UwD

    %Ov=xOW xDiQoXv2V

    xiv = 1 8 i 2 C (1)Xv2V

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    xiv 2 f0; 1g yjv 2 f0; 1gCmQL xQo l} CtU x@ Ov=wD|t =yvD |QDWt Qy xm CU= u; Qou=}@ pw= C}OwOLtVy=m xm@W QO =Q =y|}=Hx@=H w C=mQL sm =QD xm u; seQ|ra C}OwOLt u}= "Ovm"Ovm|tv O=H}= p}yUD l} R= V}@ R= u=} QDWt |Q}oT} wQU Q@ |D}OwOLt 'OyO|txQo l} CtU x@ =yvD Ov=wD|t p}yUD Qy xm CU= u; Qou=}@ swO C}OwOLtV}@ x@ p}yUD l} |yOT} wQU =@ |D=i=vt xvwoI}y R}v C}OwOLt u}= "Ovm CmQL

    "OQ=Ov |QDWt l} R=CtU x@ xm |v=} QDWt |=y=[=kD ẁtHt xm CU= u; Qou=}@ swU C}OwOLtOW=@ |Dq}yUD |=yC}iQ_ ẁtHt |w=Ut =} QDsm O}=@ Ovvm|t CmQL v OYkt xQo|yOT} wQU R= u=v}t]= |=Q@ C}OwOLt u}= "Ovvm|t CmQL xQo u=ty CtU x@ xm

    "CU= xOW O=H}= xQo QO OwHwt u=} QDWt xty x@

    pOt |OOa p=Ft "2"5V |xawtHt CLD xm OW=@ xQo 10 R= pmWDt xm@W s}vm|t ZQi p=Ft u}= QOC xawtHt CLD xm OwW|t `k=w |}=yxQo QO u=} QDWt |=yu=mt "Ov=xOW |Q=Pos=vxawtHt CLD xOWh} QaD \=kv QO Cq}yUD |=yu=mt u}vJty w xOW |Q=Pos=vw |QDWt 6 |=Q=O xm@W u}= QO =t jwi |=yxawtHt h} QaD j@] "OvwW|t u}at Fu}= u=} QDWt p}P xOWh} QaD |=yxawtHt w jwi C=L}[wD Q@=v@ "s}DUy p}yUD 4|=yu=mt QO Cq}yUD w xDiQo Q=Qk 1 w 2 '5 '6 '7 '10 |=yxQo |=yu=mt QO xm@W|=Q@ xOW xDiQo Q_v QO |=yu=mt x@ xHwD =@ "OvQ}o|t Q=Qk 3 w 4 '7 '8 |=yxQol} w |QDWt l} xOvQ}oQ@ QO 7 xQ=tW xQo xm CU= xHwD p@=k 'Cq}yUD w u=} QDWtD |=yxawtHt T=U=Q@ Cq}yUD C}iQ_ w u=} QDWt |=[=kD Q}O=kt "CU= p}yUDGAMS Q=Ri=sQv xt=vQ@ |OwQw Q}O=kt u=wvax@ 1 pwOH j@] w OvwW|th} QaD F w|iO=YD CQwYx@ xQo wO Qy u}@ |xrY=i u}}aD |=Q@ "OvwW|t xDiQo Q_v QO�ROUND(1+RAND()*100 0� QwDUO R= xO=iDU= =@ 100 =D1 u}@ |O=Oa=

    =yQDt=Q=B "2"1"5Q}eDt ?} Q[ u=wvax@ w CU= s=i |QDWt |=[=kD u=R}t Qou=}@ QDt=Q=B u}= %Di

    "OwW|t xDiQo Q_v QO |Q}os}tYDxawtHt pm x@ jraDt� v |xQo R= s=i |QDWt |UO}rk= |xrY=i QDt=Q=B u}= %divu}= "OyO|t u=Wv OQ=O =Q u; CtU x@ CmQL OYk QwmPt |QDWt xm =Q �=yxQo

    "CU= u=} QDWt x@ jraDt R}v QDt=Q=BxawtHt pm x@ jraDt� v |xQo R= s=j p}yUD |UO}rk= |xrY=i QDt=Q=B u}= %djvu}= "OyO|t u=Wv OQ=O =Q u; CtU x@ CmQL OYk QwmPt p}yUD xm �=yxQo

    "CU= Cq}yUD x@ jraDt R}v QDt=Q=B"CU= s=j p}yUD C}iQ_ Qou=}@ %capj

    =yQ}eDt "3"1"5w OwW|t h} QaD =yxQo \=kv pm w u=} QDWt |=yT}Ov= |wQQ@ Q}eDt u}= %xjvx@ C xawtHt x@ jraDt i |QDWt xJv=vJ "CU= u=} QDWt xawtHt =@ \@DQtQO w 1 Q@=Q@ u; Q=Okt 'Ovm CmQL V xawtHt =} =yxQo \=kv pm R= v xQo CtU

    "CU= QiY Q@=Q@ CQwYu}= Q}ew OwW|t h} QaD =yxQo \=kv pm w Cq}yUD |=yT}Ov= |wQQ@ Q}eDt u}= %yjvCtU x@ F xawtHt x@ jraDt j p}yUD Qo = "CU= Cq}yUD xawtHt =@ \@DQtQ}e QO w '1 Q@=Q@ u; Q=Okt 'Ovm CmQL V xawtHt =} =yxQo \=kv pm R= v xQo

    "CU= QiY Q@=Q@ CQwYu}=pOt l} QO |Q}os}tYD |=yQ}eDt u=wvax@ =yQ}eDt u}= xm OwW|t Qw;O=}

    "OvwW|t |iQat |]N |R} Qxt=vQ@pOt C=[wQit "4"1"5

    p}yUD w |QDWt xm 'xQo Qy QO xm CU= pL p@=k |DQwY QO pOt u}= %pw= ZQiQ}PBu=mt= |QDWt x@ p}yUD \UwD |yOT} wQU 'OvwW|t OQ=w u; x@ u=tRtyxOW?=UL w |k]vt w j}kO |}x]@=Q xm u; Qot Ow@ Oy=wNv umtt Qt= u}= "OW=@u}vJty w xQo l} x@ xOW OQ=w u=} QDWt |=y=[=kD =} |QDWt l} |=[=kD u}@x=Q= pOt QO x]@=Q u}= OW=@ xDW=O OwHw xQo u; QO OwHwt Cq}yUD C}iQ_

    %CU= u}vJ xOWXj2F

    capj �Xi2F

    Di

    |=yC}iQ_ ẁtHt O}=@ pOt uOw@ Q}PBpL |=Q@ xm OyO|t u=Wv x]@=Q u}= `k=w QO"OW=@ QDW}@ v |@=NDv= xQo Qy QO OwHwt u=} QDWt |=y=[=kD ẁtHt R= Cq}yUD"CU= xm@W QO =yxQo pm |xawtHt Q@=Q@ V |xawtHt jwi pOt QO %swO ZQixQo Qy x@ i xQo Qy xm swyit u}= x@ xOw@ xDUw}B xOW xDiQo Q_v QO xm@W =Hv}= QO"OQ=Ov OwHw xm@W u}= QO |}xrwR}= w =yvD T-=Q I}y w CU= pYDt xm@W QO j"CU= xm@W |=yxQo pm Q@=Q@ V |xawtHt OW xQ=W= xm u=vJ %swU ZQiQ_v QO Cq}yUD Q@=Q@ F |xawtHt w u=} QDWt |xawtHt =@ Q@=Q@ C |xawtHtxawtHt pm R= |}=yxawtHtQ} R Cq}yUD w u=} QDWt |xawtHt "OwW|t xDiQoQO "OvW=@ Q@=Q@ R}v =yxQo xawtHt pm =@ Ovv=wD|t O=OaD ^=Lr R= xm OvDUy =yxQo=} p}yUD l} Q=QkDU= pLt =} |QDWt l} Q=QkDU= pLt Ov=wD|t xQo Qy jwi pOtCq}yUD w =y|QDWt R= s=OmQy Ok=i Ov=wD|t Qo}O Cr=L QO =} 'OW=@ =yu; wO Qy

    "OW=@ xm@W

    80

  • u=}QoD=Q

    =Uwu=}U

    =@Qm|Oy

    t

    "xQo 10 R= pmWDt |i=Qo "1 pmW

    "pOt pLR= TB Cq}yUD w u=} QDWt Q=QkDU= pLt "2 pmW

    "pOt pL R= TB Cq}yUD w u=} QDWt Q=QkDU= pLt "3 pmW

    Q=QkDU= uwO@ '=yvD xm@W pw= |xrLQt QO "s} R=OQB|t p=Ft u}= K}[wD x@ xrLQt"OwW|t xO=O u=Wv 1 pmW QO u=} QDWt w Cq}yUD

    Cq}yUD w u=} QDWt |=ypLt |iO=YD CQwYx@ xm@W |rm |UQQ@ R= TB|mWt nvQ =@ xm@W |O=a |=yxQo pmW u}= QO "�2 pmW� OvwW|t XNWtOv=xOWXNWt Cq}yUD |=Q@ |iO=YD CQwYx@ xm |}=yxQo =t= Ov=xOW xO=O u=WvQO xt=O= QO "CU= xOW XNWt |@; nvQ =@ u=} QDWt |=ypLt w RtQk nvQ =@"CU= xOW XNWt pOt pL R= TB Cq}yUD w u=} QDWt Q=QkDU= pLt 3 pmWx@ CtON Ci=} QO |=Q@ 2 |QDWt p=Ft u=wvax@ OwW|t xOy=Wt xm u=vJ|=[=kD"CU= xOQm CmQL xQo u=ty CtU x@ R}v 2 p}yUD xm OwQ|t 9 xQo CtUw u=} QDWt x}k@ |}=Hx@=H "CU= xOt; 3 pwOH QO Cq}yUD C}iQ_ w u=} QDWt

    "OwW|t s=Hv= jwi K}[wD x@ xHwD =@ w 4 pwOH j@] R}v Cq}yUD'Qo}O |QDt=Q=B uDiQo Q_v QO =@ |twO pOt xOWx=Q= pOt |xaUwD Qw_vtx@

    "CU= xOW xO=O xaUwD w |L=Q]

    "pw= pOt |OOa p=Ft C}iQ_ w =[=kD Q}O=kt "1 pwOH10 9 8 7 6 5 4 3 2 1 V �C�F40 0 0 10 30 10 0 0 20 10 D(i)0 0 30 40 0 0 40 30 0 0 cap(j)

    "d(i; j) = d(j; i) Q} R T} QD=t j@=]t %d(i; j)"pw= pOt |OOa p=FtQO xQo wO u}@ |=yCi=Ut "2 pwOH

    i

    10 9 8 7 6 5 4 3 2 1 d(i; j)

    j

    22 75 28 77 12 9 45 98 4 0 149 23 2 88 91 63 99 94 0 236 97 62 14 80 27 60 0 382 86 50 28 58 15 0 426 11 79 92 94 0 570 52 42 24 0 683 33 84 0 737 97 0 86 0 90 10

    QO xQo wO u}@ xrY=i xR=Ov= u=wvax@ =Q =yu; w xOQw; CUO x@ EXCEL Q=Ri=sQv QOwO Qy |=Q@ &OwW|t h} QaD d(i; j) O=tv =@ i; j xQo wO u}@ xrY=i "s} Q}o|t Q_vl} QO 2 pwOH j@] xOt; CUO x@ Q}O=kt "d(i; j) = d(j; i) s} Q=O i; j xQoXNWt xQo wO Qy u}@ pY=wi |DQ=@ax@ w =yCi=Ut =D OvwW|t xO=O Q=Qk T} QD=t

    "OwWV = f1; 2; 3; : : : ; 10gC = f1; 2; 5; 6; 7; 10gD = f10; 20; 10; 30; 10; 40gF = f3; 4; 7; 8gcap = f30; 40; 40; 30g

    wO Qy =} 'p}yUD =} |QDWt CU= umtt xQo l} QO OwW|t xOy=Wt xm Qw]v=typ=Ft "OvwWv xO=O Q=Qk xQo l} QO =yu; R= s=OmI}y CU= umtt u}vJty "OvQ}o Q=Qk

    %OwW|t xDiQo Q_v QO Q} R pmW x@ GAMS |U} wvxt=vQ@ QO jwi|OOa p=Ft 'xt=vQ@ |=y|OwQw u=wvax@ jwi C=[wQit |t=tD uDiQo Q_v QO =@|=R=x@ hOy `@=D Q=Okt "s}vm|t pL GAMS Q=Ri=sQv R= xO=iDU= =@ =Q xOW KQ]tQ@=Q@ cplex xOvvmpL R= xO=iDU= =@ xrUt pL u=tR w xOw@ 354 Q@=Q@ Q}O=kt u}= pLu=tR Q_v R= GAMS Q=Ri=sQv |=yxOvvmpL Qo}O p@=kt QO xm CU= x}v=F 0 45=Q pOt |=yQDt=Q=B 'hrDNt |=yCr=L |=Q@ xt=O= QO p=L "CU= xHwD p@=k pL

    "OwW|t p}rLD w x} RHD u; G}=Dv w xO=O Q=Qk |UQQ@ OQwt

    |t}UQD p=Ft "3"5xm@W u}= QO xm CU= xOW xDiQo Q_v QO xQo 10 R= pmWDt |}xm@W CtUk u}= QOQy =@ \@DQt p=mW= sUQ =@ w xrLQt xU |] "Ov=xDiQo Q=Qk |QDWt 7 w p}yUD 3

    81

  • """xm@Wl

    }QOlQL

    DtCq}y

    UD=@C

    =R}yHD|

    }=tv=HQ@=Q@ |}=[=kD |=Q=O w C}iQ_ uwO@ xQo u}= pOt |Q}PBpL Qw_vtx@ "Ovvm CmQL

    CU= u; xHwD p@=k |xDmv "OQ=Ov OwHw xQo u}= QO |QDWt I}y `k=w QO &CU= QiYu; |=Q@ OwWv Q=OxWON pOt pL C}r@=k xm u}= |=Q@ =yvD w xOw@ |R=Ht xQo u}= xm

    "OQ=Ov |HQ=N OwHw |}xQo u}vJ |ak=w Cr=L QO &OwW|t xDiQo Q_v QO

    swO pOt |[=} Q |Ov@pwtQi "1"6xOW h} QaD CQwY u=ty x@ R}v swO pOt QO pw= pOt |=yQDt=Q=B w =yT}Ov= x}rmw xOwRi= =yQDt=Q=B Qo}O Q@ =Q w uRw QDt=Q=B swO pOt QO =t= OvwW|t xDiQo Q=mx@ w

    "CU= s=i |QDWt �C}ty=� uRw Q@=Q@ wi %s}=xOQm h} QaD u}vJ =Q u;

    pOt C=[wQit "1"1"6pOt X=N \}=QW Crax@ 'pw= pOt C=[wQit Q@ xwqa swO pOt C=[wQit

    %CU= h}YwD p@=k Q} R CQwYx@p=tDL= u}= 'OwW|t xO=O X}YND uRw l} pOt QO |QDWt Qy x@ xm =Hv; R= "1|x]}L QO u=} QDWt R= |[a@ xm CW=O Oy=wN OwHw |a]k O=ONQ O}=W =}'t |R=Ht xQol} uDiQo Q_v QO =@\}=QW u}= QO "OvwWv xDiQo Q=Qk |v=UQCtONpLt R= |}=Hx@=H s=ovy OvQ}o|tv Q=Qk |v=UQCtON |x]}L QO xm |v=} QDWt|v=UQCtON Qw_vtx@ xrUtC}rm R= uDU=m uwO@ w |R=Ht CQwYx@ u=W|rai|Dr=L QO s=N + 1 xQo u=wvax@ =Q xQo u}= "Ovvm|t CmQL xQo u}= CtU x@

    "s} Q}o|t Q_v QO 'OW=@ N Q@=Q@ |R=Ht xQo uwO@ =yxQo pm O=OaD xm|DQ=@ax@ =} Dt = 0 |va} 'OQ=Ov OwHw |QDWt xOW h} QaD |R=Ht xQo QO "2|ak=w Cr=L QO xm OyO|t u=Wv ZQi u}= "CU=QiY Q@=Q@ QwmPt xQo |=[=kD

    "OQ=Ov OwHw Q_v OQwt xm@W QO |}xQo u}vJ|DQ=@ax@ "CU=yxQo pm |=[=kD Q@=Q@ xOW xDiQo Q_v QO |R=Ht xQo C}iQ_ "3xty uOW xOQw;Q@ Qw_vtx@ ZQi u}= "capt = Pi6=tDi %CW=O s}y=wN

    "OwW|t xDiQo Q_v QO u=} QDWt |=y=[=kD&CU= QiY Q@=Q@ jwi |R=Ht xQo R= p}yUD xQo Qy =} |QDWt xQo Qy |xrY=i "4QO =Q ZQi u}= "djt = 0; j 2 F; dit = 0; i 2 V %s} Q=O Qo}O CQ=@ax@

    "s} Q}o|t Q_v QO t xQo uOw@ |R=Ht |=DU=Q"CU= 0 �Wi � 1 xm CW=O s}y=wN =yDv= QO "5

    pOt |=yC}OwOLt w hOy `@=D "2"1"6%OvwW|t u=}@ Q} R CQwYx@ jwi pOt hOy `@=wD

    Minimize f1 =Xi2C

    Xv2V

    xivDidiv +Xj2F

    Xv2V

    yjvdjv

    Minimize f2 = � Xi2V;i6=t

    Xv2V;v 6=t

    xivDiwi

    pm uOQmxv}tm |=DU=Q QO �� pw= pOt QO Q_v OQwt hOy u=ty �� pw= hOy `@=D'OW u=}@ pw= pOt KQW QO xm u=vJ w CU= Cq}yUD w u=} QDWt |=y|}=Hx@=H|r=L QO CU= u=} QDWt |=y|}=Hx@=H ẁtHt Qou=Wv f1 hOy `@=D R= pw= CtUk

    "CU= Cq}yUD |=y|}=Hx@=H ẁtHt Qou=Wv u; swO CtUk xmCyH u; R= ẁtHt u}= "CU= |ivt Ctqa =@ C=R=}Dt= ẁtHt swO hOy `@=DpL p@=k xrUt pm hOy `@=D uOQmp=tQv xrLQt QO xm xOW xDiQo Q_v QO |ivt

    "pw= pOt |t}UQD p=Ft Cq}yUD C}iQ_ u=R}t w u=} QDWt |=[=kD u=R}t "3 pwOHC}iQ_ u =R}t p}yUD pLt =[=kD u=R}t |QDWt u=mt

    230 7 199 9121 6 88 10250 2 10 2

    128 448 138 535 7

    "pw= pOt |t}UQD p=Ft Cq}yUD w u=} QDWt OY=kt "4 pwOHxm xm@W xQo xQ=tW xQ=tW xm@W xQo xQ=tW xQ=tWu; CtU x@ p}yUD xQo CtU x@ |QDWt xm xQoOvm|t CmQL p}yUD Ovm|t CmQL u; |QDWt

    9 2 9 93 7 3 101 6 9 2

    3 41 11 51 7

    u=} QDWt C}ty= uDiQo Q_v QO =@ pOt |xaUwD "6w =yxYNWt |t=tD "CU= xOW x=Q= |x}rw= pOt R= |}xaUwD `k=w QO swO pOtu; |=yC}OwOLt w =yQDt=Q=B w =yQ}eDt |t=tD R}v w 'pw= pOt QO xOW u=}@ \}=QWpOt QO xm CU= xDmv u}= QO pOt wO u}= Cw=iD =t= "CU= Q=QkQ@ R}v swO pOt |=Q@`k=w QO xm OwW|t xi=[= pOt x@ C}ty= =} uRw QDt=Q=B s=vx@ |O}OH QDt=Q=B swO|yOT} wQU |=Q@ |QDWt Qy Qo}O u=}@ x@ "CU= xm@W QO OwHwt u=} QDWt XDNtxm Ow@ Oy=wN |vRw |DQ=@ax@ =} C}ty= |=Q=O xm@W QO OwHwt Cq}yUD Q_v R=|[a@ hPL 'pOt QO uRw QDt=Q=B uDiQo Q_v QO "O@=}|t X}YND |QDWt u; x@u; R= C}ak=w u}= "CW=O Oy=wN p=@vO x@ |v=UQCtON |x]}L R= =Q u=} QDWt R=Q=Qk p}yUD l} |v=UQCtON |xOwOLt QO xm |v=} QDWt u=}t R= xm CU= CyH'OvwW|t ?=NDv= OvQ=O Q_v OQwt p}yUD |=Q@ |QDW}@ C}ty= xm |}=yu; OvQ}o|ts}kDUt \=@DQ= u; |=[=kD u=R}t =@ |QDWt l} x@ |yOT} wQU xm =Hv; R= =t=u=wvax@ 'u; C}ty= u=R}t QO |QDWt Qy |=[=kD ?Q[pY=L swO pOt QO OQ=OQU}t |yOT} wQU Qw_vtx@ =Q |QDWt l} Vv} Ro xm OwW|t ?=NDv= |QDt=Q=B'u}}=B |=[=kD w q=@ C}ty= |=Q=O |QDWt l} CU= umtt Cr=L u}= QO "OR=U|t|QDWt x@ C@Uv QDq=@ |=[=kD w u}}=B C}ty= |=Q=O |Qo}O |QDWt p@=kt QO w|xv} Ro QDt=Q=B wO u}= ?Q[pY=L Q}O=kt x@ xHwD =@ Cr=L u}= QO xm 'OW=@ |r@k|m} hPL ?=NDv= u}= xm =Hv; R= "OQ}o|t Q=Qk |v=UQCtON ZQat QO |@=NDv=C}rm QO pqDN= sOa |=Q@ 'OQ=O p=@vO x@ =Q |v=UQCtON |x]}L R= u=} QDWt R='CU= |Q}oT} wQU Qw_vtx@ p}yUD l} CtU x@ |QDWt Qy CmQL Qou=}@ xm pOtR= Vv} Ro |xrLQt QO xm |v=} QDWt =D xDiQo Q_v QO xm@W |=Q@ |R=Ht xQo l}xQo u}= CtU x@ u=W}=[=kD jkLD |=Q@ 'OvwW|t hPL |v=UQCtON |xOwOLt

    82

  • u=}QoD=Q

    =Uwu=}U

    =@Qm|Oy

    t

    "xQo 15 R= pmWDt |}xm@W "4 pmW

    "|}xQo 15 |xm@W QO Cq}yUD w u=} QDWt |iO=YD Q=QkDU= pLt "5 pmW"swO pOt |t}UQD p=Ft QO Cq}yUD C}iQ_w u=} QDWt |=[=kDQ}O=kt "5 pwOH

    C}iQ_ u=R}t Cq}yUD u=mt =[=kD u =R}t u=} QDWt u=mt121 1 81 10120 2 10 4179 3 58 831 7 88 14136 8 44 12537 �|R=Ht xQo �16 29 2

    23 570 1187 747 13

    u=Wh=Oy= x@ |@=}CUO Qw_vtx@ =Q u=} QDWt w Cq}yUD OY=kt xm 6 pmW QOxm@W |rY= |=yxQo Q@ xwqa pmW u}= QO "CU= xOW xO=O u=Wv Ovm|t XNWtxOW xDiQo Q_v QO 'CU= |} woMU=B x@ QO=k u; |x]U=wx@ pOt xm '|R=Ht xQo l}|=yu=mt =} OY=kt xm xOW xDW=Po V}=tv x@ |rwOH pmW u}= |xt=O= QO "CU="Ovm|t XNWt u=W|rai pLt R= |}=Hx@=H R= Oa@ =Q Cq}yUD w u=} QDWt O}OHQw_vtx@ u=} QDWt w Cq}yUD |}=yv OY=kt Qou=}=tv 6 pmW OW xQ=W= xm u=vJxQo l} QO xm CU= XNWt pmW u}= QO "CU= CtON Ci=} QO w |v=UQCtONj@] "OW=@ xDW=O OwHw |Q}oT} wQU Qw_vtx@ |QDWt l} R= V}@ CU= umtt

    C@Ft Ctqa =@ C=R=}Dt= ẁtHt uOQmxv}W}@ u=ty swO |rY= hOy `@=D =t= "OW=@|=Q@ �QDW}@ C}ty=� QDq=@ C} wrw= =@ |QDWt ?=NDv= f2 uOQmxv}tm R= hOy "CU=u}vJ w CU= pw= pOt |=yC}OwOLt uwJty =yC}OwOLt "CU= |v=UQCtON

    %OvwW|t h} QaDXv2V

    xiv = 1 8 i 2 CXv2V

    yjv = 1 8 j 2 FXj

    capj :yjv �Xi2C

    Dixi 8 v 2 V

    w 'xOW pL uOQmxv}tm hOy =@ f1 hOy `@=D |=Q@ pOt Q=@l} jwi pOt pL QOl} f2 hOy `@=D |=Q@ jwi pOt TBU "OwW|t pL uOQmxv}W}@ hOy =@ Qo}O Q=@=@ pOt TBU "OwW|t pL uOQmxv}W}@ hOy =@ Qo}O Q=@ w uOQmxv}tm hOy =@ Q=@

    "OwW|t p=tQv CU= |@}mQD hOy `@=D l} xm Q} R hOy `@=Dmin(1(f1 f1 min)=(f1 max f1 min) + 2(f2 f2 min)=

    (f2 max f2 min))

    "OvQ}o|t Q=Okt l} w QiY u}@ xm OvDUy hOy `@=D Qy |=yuRw 1; 2x]@=Q u}= QOxDU@ u}vJty w xrUt QO OwHwt \}=QW x@ xDU@ xOWp=tQv hOy `@=D QO ?}=Q[ u}=\}=QW xOvQ}os}tYD OQi Q_v QO CU= umtt "OvwW|t u}}aD xOvQ}o s}tYD OQi x@QDq=@ C}ty= =@ u=} QDWt ?=NDv= x@ C@Uv =y|}=Hx@=H uOQmxv}tm xm OW=@ |}xvwox@|QDW}@ Q=Okt |=Q=O 1 ?} Q[ Cr=L u}= QO "OW=@ xDiQo Q=Qk |QDq=@ C} wrw= QO

    1; 2 Q}O=kt u}=Q@=v@ "Ow@ Oy=wN jwi xOWp=tQv CQ=@a QO 2 ?} Q[ x@ C@UvQO w OwW|t u}}aD xOvQ}os}tYD OQi Q_v w xrUt \}=QW x@ xDU@ jwi CQ=@aQO

    "OW Oy=wNv xDiQo Q_v QO |D}OwOLt OQwt u}=swO pOt |t}UQD p=Ft "3"1"6

    p}yUD 5 u; QO xm CU= xOW xDiQo Q_v QO xQo 15 R= pmWDt |}xm@W p=Ft u}= QOx@ xrLQt Qy =@ \@DQt p=mW= sUQ =@ w xrLQt xU |] QO "OQ=O Q=Qk |QDWt 10 w

    "s} R=OQB|t p=Ft u}= K}[wDQO OwHwt Cq}yUD w u=} QDWt uDiQo Q_vQO uwO@ =yvD xm@W pw= xrLQt QOQ=QkDU= pLt 5 pmW QO xrLQt u}= R= TB "OwW|t xO=O u=Wv 4 pmW QO xm@WCq}yUD w u=} QDWt Q=QkDU= pLt "OwW|t XNWt Cq}yUD w u=} QDWt |iO=YDu=} QDWt |=[=kD Q}O=kt "CU= xOW ?=NDv=|iO=YD CQwYx@|}xQo 15 |xm@W QOCW=O xHwD O}=@ "�5 pwOH� Ov=xOW u}at |iO=YD CQwYx@ R}v Cq}yUDC}iQ_ wxm CU= swyit u}= x@ CU= 10 Q@=Q@ |QDWt xQo xQ=tW p=Ft u=wvax@ xm |v=tR

    "OwW|t QkDUt xm@W 10 xQ=tW xQo QO |rY= |xm@W QO |QDWt?=NDv= |iO=YD CQwYx@ xm Cq}yUD w u=} QDWt Q=QkDU= pLt 5 pwOH R=C}iQ_ w u=} QDWt |=[=kD Q}O=kt |t=tD u}vJty "OwW|t XNWt Ov=xOW"CU= xOW xOQw; pwOH u}= QO Ov=xOW ?=NDv= |iO=YD CQwYx@ xm R}v Cq}yUDw =y|oS} w Q@=v@ swO p=Ft QO "CU= xDiQo CQwY p=Ft QDy@ lQO Qw_vtx@ Qt= u}=xQo Qw_vt u}= x@ "CU= R=}v |R=Ht xQo l} x@ pOt pL |=Q@ 'pOt |=yxYNWtCU= pOt ZQi ?@U x@ R}v u}= w CU= xOW xDiQo Q_v QO |R=Ht xQo u=wvax@ 16xm@W |=yxQo O=OaD N � CU= N + 1 Q@=Q@ |R=Ht xQo xQ=tW xm u}= Q@ |vD@t

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    =yCWwv=B1. Basch2. kinetic data structure3. certi�cate4. responsive5. e�ciency6. compactness7. locality8. un Capacitated facility Location problem

    �References� `@=vt1. Tolhah, A., Zaitul, M.Z. and Sutinah, S. \A Simulated an-

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