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ÓÐû¶®Fortran²¢Ðбà³ÌµÄ£¬Ä¿Ç°ÎÒÃæÁÙµÄÒ»¸öÎÊÌ⣺ÓÃFortran ±àдµÄ³ÌÐòÔÚ·þÎñÆ÷ÉÏÅÜÁ˼¸Ìì¾Í²»³ö½á¹û£¬Ïë°ÑËü¸Ä³É²¢ÐеÄÓöàºË¼ÆË㣬µ«Ã»Ñ§¹ý²¢Ðеģ¬ËùÒÔºÜÍ·ÌÛ£¬ÐèҪһλ´óÉñ°ï°ïÎÒ¡£»òÕßÊÇÓÅ»¯Ò»Ï³ÌÐòµÄËã·¨£¬ÏÂÃæÒ»¶Î³ÌÐò£¬Óõ¥ºË¼ÆËãÅܵÄÌ«¾Ã£¬ÔõÑù¸Ä½øÒ»ÏÂËã·¨£º subroutine initial_condition() use global implicit none real :: r1, p1 = 0.5 do i = 1,n call random_number(r1) if(r1 < p1)then s(i) = 1.0 else s(i) = -1.0 end if sum1 = sum1 + s(i) end do return end subroutine mcs() use global implicit none integer :: ii real :: r2, r3, sum2 = 0.0 real :: ws(n) do ii = 1,n sum2 = 0.0 call random_number(r2) i = n*r2 + 1 sum1 = sum1 - s(i) do j = 1,n if(ad(i,j) == 1)then sum2 = sum2 + s(j) end if end do if(sum2<0)then ws(i) = (1-(1-2*q)*s(i)*(-1.0))/2 else if(sum2>0)then ws(i) = (1-(1-2*q)*s(i)*(1.0))/2 else ws(i) = 0.5 end if call random_number(r3) if(r3 <= ws(i))then s(i) = -s(i) else s(i) = s(i) end if sum1 = sum1 + s(i) end do return end !**************************Ising dynamics******************************* subroutine dynamics() use global implicit none integer :: mm, t = 0 real :: sum3 = 0.0, sum4 = 0.0, sum5 = 0.0 real :: m(time) do mm = 1,n1 q = q + 0.005 call initial_condition() do while(t < time) call mcs() t = t + 1 m(t) = abs(sum1/n) if(t>200000)then sum3 = sum3 + m(t)**4 sum4 = sum4 + m(t)**2 sum5 = sum5 + m(t) end if end do MNq(mm) = sum5/(time-200000) UNq(mm) = 1 - (sum3/(time-200000))/(3*((sum4/(time-200000))**2)) t = 0 sum1 = 0.0 sum3 = 0.0 sum4 = 0.0 sum5 = 0.0 end do return end |
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