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📄 be2die.for

📁 两维弹性边界元程序
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!============================================================
!crack!crack!crack!crack!crack!crack!crack!crack!crack!crack
	elseif(JCrkN0C1Tip2Ele(NE).gt.0) then
!-----------------------------------------------------------
!resid!resid!resid!resid!resid!resid!resid!resid!resid!resid!resid
	 Do 1301 IC=1,NCmp
	 JCrkN0C1Resid=1
1301	 Call ResidCrkN0C1(
	1	JCrkN0C1Resid,IC,NN,NE,Resid(IC),ResidMax,
	1	NCmp,NECap,NtotEle,NodEle,NthBdEle,JCrkN0C1Tip2Ele,
     1	NtotCfKCap,NthCfK,CfUP,
     1	UNod,PNod,UHomoNod,PHomoNod)
!--------------------------------------------------------------	
!solving!solving!solving!solving!solving!solving!solving
	 If(NCmp.eq.2) then
	  WDmg=DSQRT(UNod(1,NN,NE)**2+UNod(2,NN,NE)**2+1.d-14)
	 else
	  WDmg=DSQRT(UNod(1,NN,NE)**2+UNod(2,NN,NE)**2+1.d-14
	1	+UNod(3,NN,NE)**2)
	 endif
	 If(WDmg.lt.WDmgNod(NN,NE)) WDmg=WDmgNod(NN,NE)
	 NthGrp=NthGrpEle(NE)
	 EK=UserEKLineSpring(NthGrp,WDmg)
	 Call UserFrictParam(NthGrp,FC,WTaoD)
	 NCallNN=-1
1321	 NCallNN=NCallNN+1
	 If(PNod(1,NN,NE).lt.0.d0) then !contact
	  IC=1
	  UNod(IC,NN,NE)=0.d0
	  CfPDiag=CfUP(IC,IC+NCmp,NthCf1Diag)
	  PNod(IC,NN,NE)=Resid(IC)+PNod1(IC,NN,NE)-CfPDiag*UNod(IC,NN,NE)
	  If(PNod(1,NN,NE).gt.0.d0.and.NCallNN.le.3) goto 1321
	  If(NCmp.eq.2) then
	   WTaoDTp=DABS(UNod(2,NN,NE)-UNod0(2,NN,NE))
	  else
	   WTaoDTp=DSQRT((UNod(2,NN,NE)-UNod0(2,NN,NE))**2
	1	+(UNod(3,NN,NE)-UNod0(3,NN,NE))**2+1.d-14)
	  endif
	  IF(WTaoDTp.lt.WTaoD) WTaoDTp=WTaoD
	  Do IC=2,NCmp
	   CfPDiag=CfUP(IC,IC+NCmp,NthCf1Diag)
	   UNod(IC,NN,NE)=UNod(IC,NN,NE)+
	1	AlphaC*Resid(IC)/(EK-FC*PNod(1,NN,NE)/WTaoDTp-CfPDiag)
	  enddo
	  If(NCmp.eq.2) then
	   WTaoDTp=DABS(UNod(2,NN,NE)-UNod0(2,NN,NE))
	  else
	   WTaoDTp=DSQRT((UNod(2,NN,NE)-UNod0(2,NN,NE))**2
	1	+(UNod(3,NN,NE)-UNod0(3,NN,NE))**2+1.d-14)
	  endif
	  IF(WTaoDTp.lt.WTaoD) WTaoDTp=WTaoD
	  Do IC=2,NCmp
	   PNod(IC,NN,NE)=EK*UNod(IC,NN,NE)-
	1	FC*PNod(1,NN,NE)*(UNod(IC,NN,NE)-UNod0(IC,NN,NE))/WTaoDTp
	  enddo
	 else	!opening
	  Do IC=1,NCmp
	   CfPDiag=CfUP(IC,IC+NCmp,NthCf1Diag)
	   UNod(IC,NN,NE)=UNod1(IC,NN,NE)+AlphaC*Resid(IC)/(EK-CfPDiag)
	   PNod(IC,NN,NE)=EK*UNod(IC,NN,NE)
	  enddo
	  If(PNod(1,NN,NE).lt.0.d0.and.NCallNN.le.3) goto 1321
	 endif
	 If(NCallNN.gt.NCallCntctMax) NCallCntctMax=NCallNN
!============================================================
!non crack!non crack!non crack!non crack!non crack!non crack!non crack
!MstSlv!MstSlv!MstSlv!MstSlv!MstSlv!MstSlv!MstSlv!MstSlv!MstSlv!MstSlv
	elseif(NthSlvMstEle(NE).gt.0) then
	 NESlv=NthSlvMstEle(NE)
	 NNSlv=NodEle(NE)+1-NN
	 NthCf0DiagSlv=NthCfK(NESlv,NNSlv,NESlv,NNSlv,0)
!-----------------------------------------------------------
!resid!resid!resid!resid!resid!resid!resid!resid!resid!resid!resid
	 Do 1401 IC=1,NCmp
	 JCrkN0C1Resid=0
	 Call ResidCrkN0C1(
	1	JCrkN0C1Resid,IC,NN,NE,Resid(IC),ResidMax,
	1	NCmp,NECap,NtotEle,NodEle,NthBdEle,JCrkN0C1Tip2Ele,
     1	NtotCfKCap,NthCfK,CfUP,
     1	UNod,PNod,UHomoNod,PHomoNod)
1401	 Call ResidCrkN0C1(
	1	JCrkN0C1Resid,IC,NNSlv,NESlv,ResidSlv(IC),ResidMax,
	1	NCmp,NECap,NtotEle,NodEle,NthBdEle,JCrkN0C1Tip2Ele,
     1	NtotCfKCap,NthCfK,CfUP,
     1	UNod,PNod,UHomoNod,PHomoNod)
!----------------------------------------------------------------
!solving!solving!solving!solving!solving!solving!solving!solving
	 Theta=OEle(NESlv)-OEle(NE)-PI
	 If(NCmp.eq.2) then
	  WDmg=DSQRT(
	1	(-UNod(1,NNSlv,NESlv)-UNod(1,NN,NE)+DNormGapMstNod(NN,NE))**2
	1	+(-UNod(2,NNSlv,NESlv)-UNod(2,NN,NE))**2 +1.d-14)
	 else
	  WDmg=DSQRT(
	1	(-UNod(1,NNSlv,NESlv)-UNod(1,NN,NE)+DNormGapMstNod(NN,NE))**2
	1	+(-UNod(2,NNSlv,NESlv)-UNod(2,NN,NE))**2 
     1	+(UNod(3,NNSlv,NESlv)-UNod(3,NN,NE))**2+1.d-14)
	 endif
	 If(WDmg.lt.WDmgNod(NN,NE)) WDmg=WDmgNod(NN,NE)
	 NthGrp=NthGrpEle(NE)
	 EK=UserEKLineSpring(NthGrp,WDmg)
	 Call UserFrictParam(NthGrp,FC,WTaoD)
	 NCallNN=-1
1411	 NCallNN=NCallNN+1

	 If(PNod(1,NN,NE).lt.0.d0) then	!contact
	  IC=1
	  CfUDiag=CfUP(IC,IC,NthCf0Diag)
	  CfUDiagSlv=CfUP(IC,IC,NthCf0DiagSlv)
	  PNod(IC,NN,NE)=PNod1(IC,NN,NE)-Alpha*
	1	(Resid(IC)+ResidSlv(IC))/(CfUDiag+CfUDiagSlv)
	  If(PNod(1,NN,NE).ge.0.d0.and.NCallNN.le.3) goto 1411
	  U1NodDif=-DNormGapMstNod(NN,NE)  !U1Dif=-(UnSlv*COS(qSlv-qMst-pi)-UtSlv*SIN)-UnMst
	  CfPDiag=CfUP(IC,IC+NCmp,NthCf0Diag)
	  CfPDiagSlv=CfUP(IC,IC+NCmp,NthCf0DiagSlv)
	  U1NodSum=-UNod1(IC,NNSlv,NESlv)+UNod1(IC,NN,NE)+   !USum=-USlave+UMaster
	1	Alpha*(-ResidSlv(IC)+Resid(IC))/(1.d0+CfPDiag+CfPDiagSlv)
!
	  If(NCmp.eq.2) then
	   U2Frct0=-UNod0(2,NN,NE)-(UNod0(2,NNSlv,NESlv)*DCOS(Theta)+
	1	 UNod0(1,NNSlv,NESlv)*DSIN(Theta))
	   U2Frct1=-UNod1(2,NN,NE)-(UNod1(2,NNSlv,NESlv)*DCOS(Theta)+
	1	 UNod1(1,NNSlv,NESlv)*DSIN(Theta))
	   WTaoDTp=DABS(U2Frct1-U2Frct0)
	  else
	   U2Frct0=-UNod0(2,NN,NE)-(UNod0(2,NNSlv,NESlv)*DCOS(Theta)+
	1	 UNod0(1,NNSlv,NESlv)*DSIN(Theta))
	   U2Frct1=-UNod1(2,NN,NE)-(UNod1(2,NNSlv,NESlv)*DCOS(Theta)+
	1	 UNod1(1,NNSlv,NESlv)*DSIN(Theta))
	   U3Frct0=UNod0(3,NNSlv,NESlv)-UNod0(3,NN,NE)
	   U3Frct1=UNod1(3,NNSlv,NESlv)-UNod1(3,NN,NE)
	   WTaoDTp=DSQRT((U2Frct1-U2Frct0)**2+(U3Frct1-U3Frct0)**2)
	  endif
	  If(WTaoDTp.lt.WTaoD) WTaoDTp=WTaoD
!
	  IC=2
	  CfUDiag=CfUP(IC,IC,NthCf0Diag)
	  CfPDiag=CfUP(IC,IC+NCmp,NthCf0Diag)
	  CfUDiagSlv=CfUP(IC,IC,NthCf0DiagSlv)
	  CfPDiagSlv=CfUP(IC,IC+NCmp,NthCf0DiagSlv)
	  U2NodDif=U2Frct1+   !U2Dif=-(UnSlv*SIN(qSlv-qMst-pi)+UtSlv*COS)-U2Mst
	1	Alpha*(-(ResidSlv(1)*DSIN(Theta)+ResidSlv(2)*DCOS(Theta))
     1		-Resid(IC))/(1.d0+CfPDiag+CfPDiagSlv+
     1	(EK-FC*PNod(1,NN,NE)/WTaoDTp)*(CfUDiag+CfUDiagSlv))
 	  U2NodSum=-UNod1(IC,NNSlv,NESlv)+UNod1(IC,NN,NE)+	!USum=-USlave+UMaster
	1	Alpha*(-ResidSlv(IC)+Resid(IC))/(1.d0+CfPDiagSlv+CfPDiag)
	  UNod(1,NNSlv,NESlv)=((U1NodSum+U1NodDif)*(1.d0+DCOS(Theta))+
	1	(U2NodSum+U2NodDif)*DSIN(Theta))/(-2.d0-2.d0*DCOS(Theta))
	  UNod(2,NNSlv,NESlv)=(U2NodSum+U2NodDif+
	1	UNod(1,NNSlv,NESlv)*DSIN(Theta))/(-1.d0-DCOS(Theta))
	  UNod(1,NN,NE)=U1NodSum+UNod(1,NNSlv,NESlv)
	  UNod(2,NN,NE)=U2NodSum+UNod(2,NNSlv,NESlv)
	  If(NCmp.eq.3) then
	   IC=3
	   CfUDiag=CfUP(IC,IC,NthCf0Diag)
	   CfPDiag=CfUP(IC,IC+NCmp,NthCf0Diag)
	   CfUDiagSlv=CfUP(IC,IC,NthCf0DiagSlv)
	   CfPDiagSlv=CfUP(IC,IC+NCmp,NthCf0DiagSlv)
	   UNodDif=UNod1(IC,NNSlv,NESlv)-UNod1(IC,NN,NE)+   !UDif=USlave-UMaster
	1	Alpha*(ResidSlv(IC)-Resid(IC))/(1.d0+CfPDiag+CfPDiagSlv+
     1	(EK-FC*PNod(1,NN,NE)/WTaoDTp)*(CfUDiag+CfUDiagSlv))
 	   UNodSum=UNod1(IC,NNSlv,NESlv)+UNod1(IC,NN,NE)+   !USum=USlave+UMaster
	1	Alpha*(ResidSlv(IC)+Resid(IC))/(1.d0+CfPDiagSlv+CfPDiag)
	   UNod(IC,NN,NE)=(UNodSum-UNodDif)/2.d0
	   UNod(IC,NNSlv,NESlv)=(UNodSum+UNodDif)/2.d0
	  endif

	  If(NCmp.eq.2) then
	   U2Frct=-UNod(2,NN,NE)-(UNod(2,NNSlv,NESlv)*DCOS(Theta)+
	1	 UNod(1,NNSlv,NESlv)*DSIN(Theta))
	  else
	   U2Frct=-UNod(2,NN,NE)-(UNod(2,NNSlv,NESlv)*DCOS(Theta)+
	1	 UNod(1,NNSlv,NESlv)*DSIN(Theta))
	   U3Frct=UNod(3,NNSlv,NESlv)-UNod(3,NN,NE)
	  endif
	  IC=2
	  PNod(2,NN,NE)=EK*U2Frct
	1	-FC*PNod(1,NN,NE)*((U2Frct-U2Frct0)/WTaoDTp)
	  PNod(1,NNSlv,NESlv)=PNod(1,NN,NE)*DCOS(Theta)+
	1	PNod(2,NN,NE)*DSIN(Theta)
	  PNod(2,NNSlv,NESlv)=-PNod(1,NN,NE)*DSIN(Theta)+
	1	PNod(2,NN,NE)*DCOS(Theta)
	  If(NCmp.eq.3) then
	   PNod(3,NN,NE)=EK*U3Frct
	1	-FC*PNod(1,NN,NE)*((U3Frct-U3Frct0)/WTaoDTp)
	   PNod(3,NNSlv,NESlv)=-PNod(3,NN,NE)
	  endif

	 else	!opening

	  Do 1415 IC=1,2
	  CfUDiag=CfUP(IC,IC,NthCf0Diag)
	  CfPDiag=CfUP(IC,IC+NCmp,NthCf0Diag)
	  CfUDiagSlv=CfUP(IC,IC,NthCf0DiagSlv)
	  CfPDiagSlv=CfUP(IC,IC+NCmp,NthCf0DiagSlv)
	  UNodDif=-UNod1(IC,NNSlv,NESlv)-UNod1(IC,NN,NE)+   !UDif=-USlave-UMaster
	1	Alpha*(-ResidSlv(IC)-Resid(IC))/
	1	(1.d0+CfPDiagSlv+CfPDiag+EK*(CfUDiagSlv+CfUDiag))
	  UNodSum=-UNod1(IC,NNSlv,NESlv)+UNod1(IC,NN,NE)+   !USum=-USlave+UMaster
	1	Alpha*(-ResidSlv(IC)+Resid(IC))/(1.d0+CfPDiagSlv+CfPDiag)
	  UNod(IC,NN,NE)=(UNodSum-UNodDif)/2.d0
1415	  UNod(IC,NNSlv,NESlv)=(-UNodSum-UNodDif)/2.d0
	  U1NodDif=-UNod(1,NN,NE) !U1Dif=-(UnSlv*COS(qSlv-qMst-pi)-UtSlv*SIN)-UnMst
	1	-(UNod(1,NNSlv,NESlv)*DCOS(Theta)-
     1		UNod(2,NNSlv,NESlv)*DSIN(Theta))
	  U2NodDif=-UNod(2,NN,NE) !U2Dif=-(UnSlv*SIN(qSlv-qMst-pi)+UtSlv*COS)-U2Mst
	1	-(UNod(1,NNSlv,NESlv)*DSIN(Theta)+
     1		UNod(2,NNSlv,NESlv)*DCOS(Theta))
	  PNod(1,NN,NE)=EK*(U1NodDif+DNormGapMstNod(NN,NE))
	  PNod(2,NN,NE)=EK*U2NodDif
	  PNod(1,NNSlv,NESlv)=PNod(1,NN,NE)*DCOS(Theta)+
	1	PNod(2,NN,NE)*DSIN(Theta)
	  PNod(2,NNSlv,NESlv)=-PNod(1,NN,NE)*DSIN(Theta)+
	1	PNod(2,NN,NE)*DCOS(Theta)
	  If(PNod(1,NN,NE).lt.0.d0.and.NCallNN.le.3) goto 1411

	  If(NCmp.eq.3) then
	   IC=3
	   CfUDiag=CfUP(IC,IC,NthCf0Diag)
	   CfPDiag=CfUP(IC,IC+NCmp,NthCf0Diag)
	   CfUDiagSlv=CfUP(IC,IC,NthCf0DiagSlv)
	   CfPDiagSlv=CfUP(IC,IC+NCmp,NthCf0DiagSlv)
	   UNodDif=UNod1(IC,NNSlv,NESlv)-UNod1(IC,NN,NE)+   !UDif=USlave-UMaster
	1	Alpha*(ResidSlv(IC)-Resid(IC))/
	1	(1.d0+CfPDiagSlv+CfPDiag+EK*(CfUDiagSlv+CfUDiag))
	   UNodSum=UNod1(IC,NNSlv,NESlv)+UNod1(IC,NN,NE)+   !USum=USlave+UMaster
	1	Alpha*(ResidSlv(IC)+Resid(IC))/(1.d0+CfPDiagSlv+CfPDiag)
	   UNod(IC,NN,NE)=(UNodSum-UNodDif)/2.d0
	   UNod(IC,NNSlv,NESlv)=(UNodSum+UNodDif)/2.d0
	   PNod(IC,NN,NE)=EK*(UNod(IC,NNSlv,NESlv)-UNod(IC,NN,NE))
	   PNod(IC,NNSlv,NESlv)=-PNod(IC,NN,NE)
	  endif

	 endif
	 If(NCallNN.gt.NCallCntctMax) NCallCntctMax=NCallNN
!=================================================================
	endif
!=================================================================
1980	continue
*===================================================================
!error control!error control!error control!error control!error control
	UErMax=0.d0
	PErMax=0.d0
	Do 2010 NE=1,NtotEle
	Do 2010 NN=1,NodEle(NE)
	Do 2010 I=1,NCmp
	UEr=DABS(UNod(I,NN,NE)-UNod1(I,NN,NE))
	If(UEr.gt.UErMax) UErMax=UEr
	PEr=DABS(PNod(I,NN,NE)-PNod1(I,NN,NE))
2010	If(PEr.gt.PErMax) PErMax=PEr
	If((Iterat-1)/IteratShow*IteratShow.eq.Iterat-1) then
	 write(*,3110) Iterat,UErMax,PErMax,NCallCntctMax
	endif
3110	format(1x,I4,2(1x,F13.9),1x,I3)
	If(UErMax.gt.UErrAllow.or.PErMax.gt.PErrAllow) goto 1101
!
	Write(*,3120) Iterat,UErMax,PErMax,NCallCntctMax
3120	format(1x,'Finish: Iterat=',1x,I4,2(1x,F13.9),1x,I3)
	write(*,*)
*********************************************************
	Call UpdateDamage(
	1	NCmp,NECap,NtotEle,NodEle,NthSlvMstEle,UNod,WDmgNod)
*********************************************************
	Call EPostProcess(NLoad,
	1	NCmp,NECap,NtotEle,XEle,NodEle,OEle,NthBdEle,NthGrpEle,
     1	JCrkN0C1Tip2Ele,NthSlvMstEle,XNod,ShpTNod,
	1	NtotCfKCap,NthCfk,CfUP,
	1	JBCU1P2,UNod,PNod,UHomoNod,PHomoNod)
*********************************************************
	Open(51,file='DUPSolut.txt',status='unknown')
	Do NE=1,NtotEle
	Do NN=1,NodEle(NE)
	 write(51,1110) 
	1	(UNod(IC,NN,NE),IC=1,NCmp),(PNod(IC,NN,NE),IC=1,NCmp)
	enddo
	enddo
	close(51)
1110	format(20(1x,f22.9)) 
*********************************************************
!crack tip fields
	NtotEleTp=NtotEle
	Do NE=1,NtotEleTp
	If(JCrkN0C1Tip2Ele(NE).eq.2) then
	 JAdvY1N0=0
	 Call UserCrkTip(
	1	NE,JAdvY1N0,OCrkAdv,ACrkAdv,
     1	NLoad,NECap,NtotEle,XEle,NodEle,OEle,NthBdEle,NthGrpEle,
     1	JCrkN0C1Tip2Ele,NthSlvMstEle,XNod,ShpTNod,
	1	UNod,PNod,UHomoNod,PHomoNod)
	 If(JAdvY1N0.eq.1.and.NtotEle.lt.NECap) 
	1 Call AdvCrkTip(NLoad,NE,
	1	NCmp,NECap,NtotEle,XEle,NodEle,OEle,NthBdEle,NthGrpEle,
     1	JCrkN0C1Tip2Ele,NthSlvMstEle,XNod,ShpTNod,
	1	NtotCfKCap,NtotCfK,NthCfk,CfUP,
     1	WDmgNod,UNod,PNod,UHomoNod,PHomoNod,
     1	OCrkAdv,ACrkAdv)
	endif
	enddo
!=====================================================
	If(NtotEle.gt.NtotEleTp) goto 1001
*********************************************************
	return
	end
*********************************************************
*********************************************************
*********************************************************
	Subroutine ResidCrkN0C1(
	1	JCrkN0C1,IC,NN,NE,Resid,ResidMax,
	1	NCmp,NECap,NtotEle,NodEle,NthBdEle,JCrkN0C1Tip2Ele,
     1	NtotCfKCap,NthCfK,CfUP,
     1	UNod,PNod,UHomoNod,PHomoNod)
	Implicit Real*8 (A-H,O-Z)
	Implicit Integer (I-N)
	Dimension NodEle(NECap),NthBdEle(NECap)
	Dimension JCrkN0C1Tip2Ele(NECap)
	Dimension NthCfK(NECap,3,NECap,3,0:1)
	Dimension CfUP(NCmp,NCmp*2,0:NtotCfKCap)
	Dimension UNod(NCmp,3,NECap),PNod(NCmp,3,NECap)
	Dimension UHomoNod(NCmp,3,NECap),PHomoNod(NCmp,3,NECap)
*========================================================
	NthBdNE=NthBdEle(NE)
	If(JCrkN0C1.eq.0) Resid=-(UNod(IC,NN,NE)-UHomoNod(IC,NN,NE))/2.d0
	If(JCrkN0C1.eq.1) Resid=-(PNod(IC,NN,NE)-PHomoNod(IC,NN,NE))
	Do 1211 ME=1,NtotEle
	If(NthBdEle(ME).ne.NthBdNE) goto 1211
	Do 1210 MN=1,NodEle(ME)
	NthK=NthCfK(NE,NN,ME,MN,JCrkN0C1)
	Do 1210 JC=1,NCmp
	If(JCrkN0C1Tip2Ele(ME).eq.0) then
	 CfUSF=CfUP(IC,JC,NthK)
	 CfPSF=CfUP(IC,JC+NCmp,NthK)
	 Resid=Resid+CfUSF*(PNod(JC,MN,ME)-PHomoNod(JC,MN,ME))
	1	-CfPSF*(UNod(JC,MN,ME)-UHomoNod(JC,MN,ME))
	else
	 CfPSF=CfUP(IC,JC+NCmp,NthK)
	 Resid=Resid+CfPSF*UNod(JC,MN,ME)
	endif
1210	continue
1211	continue
	If(DABS(Resid).gt.ResidMax) ResidMax=DABS(Resid)
*=========================================================
	return
	end
*************************************************************
*************************************************************
*************************************************************
	Subroutine UpdateDamage(
	1	NCmp,NECap,NtotEle,NodEle,NthSlvMstEle,UNod,WDmgNod)
	Implicit Real*8 (A-H,O-Z)
	Implicit Integer (I-N)
	Dimension NodEle(NECap),NthSlvMstEle(NECap)
	Dimension UNod(NCmp,3,NECap),WDmgNod(3,NECap)
*=========================================================
	Do 100 NE=1,NtotEle
	Do 100 NN=1,NodEle(NE)
	If(NthSlvMstEle(NE).eq.0) then
	 If(NCmp.eq.2) then
	  WD=DSQRT(UNod(1,NN,NE)**2+UNod(2,NN,NE)**2)
	 else
	  WD=DSQRT(UNod(1,NN,NE)**2+UNod(2,NN,NE)**2
	1	+UNod(3,NN,NE)**2)
	 endif
	elseif(NthSlvMstEle(NE).gt.0) then
	 NESlv=NthSlvMstEle(NE)
	 NNSlv=NodEle(NE)+1-NN
	 If(NCmp.eq.2) then
	  WD=DSQRT((-UNod(1,NNSlv,NESlv)-UNod(1,NN,NE))**2
	1	+(-UNod(2,NNSlv,NESlv)-UNod(2,NN,NE))**2)

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显示快捷键 ?
增大字号 Ctrl + =
减小字号 Ctrl + -