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ÓÃBrich-Murnaghan״̬·½³ÌÈ¥ÄâºÏƽºâʱµÄ¾§¸ñÌå»ý¡£ÓÃÌå»ý»Ø´úºóµÄÖµÔõôºÍÕæÊµÖµ²îÄÇô¶à°¡£¿ !announcement begin******************** implicit none real(8),allocatable::V( ![]() real(8),allocatable::E( ![]() real(8),allocatable::EV( ![]() real(8),allocatable::Ecal( ![]() real(8)::b(4),x(4) real(8)::a(4,4) real(8)::sum real(8)::E0,V0,B0,B01 real(8)::V0_2,B0_2,B01_2 integer i,j,k,n,ios character(len=80)::nonsense !End announcement********************** !Begin reading data from "comment_EvsV"******** open(unit=18,file="comment_EvsV",status="old" ![]() n=0 do read(18,*,iostat=ios)nonsense if (ios < 0) exit n=n+1 end do close(18) allocate(V(n)) allocate(E(n)) allocate(EV(n)) open(unit=18,file="comment_EvsV",status="old" ![]() do i=1,n read(18,*)V(i),E(i) end do close(18) !End reading data from "comment_EvsV"********** do i=1,4 do j=1,4 b(i)=0 a(i,j)=0 end do end do do i=1,n a(1,1)=a(1,1)+V(i)**(-4) a(1,2)=a(1,2)+V(i)**(-10/3) a(1,3)=a(1,3)+V(i)**(-8/3) a(1,4)=a(1,4)+V(i)**(-2) a(2,4)=a(2,4)+V(i)**(-4/3) a(3,4)=a(3,4)+V(i)**(-2/3) b(1)=b(1)+E(i)*(V(i)**(-2)) b(2)=b(2)+E(i)*(V(i)**(-4/3)) b(3)=b(3)+E(i)*(V(i)**(-2/3)) b(4)=b(4)+E(i) end do a(2,1)=a(1,2) a(2,2)=a(1,3);a(3,1)=a(1,3) a(2,3)=a(1,4);a(3,2)=a(1,4);a(4,1)=a(1,4) a(3,3)=a(2,4);a(4,2)=a(2,4) a(4,3)=a(3,4) a(4,4)=n do k=1,3 !if(a(k,k)=0)then ! print(*,'(a)')"divide by 0" ! exit !end if do i=k+1,4 do j=k+1,4 a(i,j)=a(i,j)+a(k,j)*(-a(i,k)/a(k,k)) b(i)=b(i)+b(k)*(-a(i,k)/a(k,k)) end do end do end do x(4)=b(4)/a(4,4) do i=3,1,-1 sum=0 do j=i+1,4 sum=sum+a(i,j)*x(j) end do x(i)=(b(i)-sum)/a(i,i) end do E0=x(4) sum=(42*x(1)*x(3)/(x(2)**2)-14)**2 sum=sum-(9*x(1)*x(3)/(x(2)**2)-3)*(196*x(1)*x(3)/(x(2)**2)-64) B01=((42*x(1)*x(3)/(x(2)**2)-14)+sqrt(sum))/(9*x(1)*x(3)/(x(2)**2)-3) B01_2=((42*x(1)*x(3)/(x(2)**2)-14)-sqrt(sum))/(9*x(1)*x(3)/(x(2)**2)-3) sum=-(x(1)/x(2))*((3*B01-14)/(B01-4)) if(sum>0)then V0=sum**1.5 B0=(16/9)*x(2)*V0**(-7/3)/(14-3*B01) sum=-(x(1)/x(2))*((3*B01_2-14)/(B01_2-4)) else if (sum>0)then V0_2=sum**1.5 B0_2=(16/9)*x(2)*V0_2**(-7/3)/(14-3*B01_2) end if allocate(Ecal(n)) do i=1,n Ecal(i)=x(1)*(V(i)**(-2))+x(2)*(V(i)**(-4/3))+x(3)*(V(i)**(-2/3))+x(4) end do open(unit=38,file="commment",status="replace" ![]() do i=1,n write(38,*)V(i),E(i),Ecal(i) end do write(38,*)V0,V0_2 close(38) stop end |
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