1 | ! **************************************************************
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2 | !
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3 | ! This file contains the subroutines: opeshe,gdtshe
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4 | !
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5 | ! Copyright 2003-2005 Frank Eisenmenger, U.H.E. Hansmann,
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6 | ! Shura Hayryan, Chin-Ku
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7 | ! Copyright 2007 Frank Eisenmenger, U.H.E. Hansmann,
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8 | ! Jan H. Meinke, Sandipan Mohanty
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9 | !
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10 | ! **************************************************************
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11 |
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12 | subroutine opeshe(nml)
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13 |
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14 | ! ......................................................................
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15 | ! PURPOSE: Calculate internal energy for ECEPP/3 dataset and its partial
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16 | ! derivatives vs. variables using recursive algorithm from:
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17 | ! Noguti T, Go N, J Phys Soc (Japan) v52 3685-3690 1984; Abe H,
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18 | ! Braun W, Noguti T, Go N, Comp Chem v8 239-247 1984; Mazur A K,
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19 | ! Abagyan R A, J Biomol Struct Dyn v6 815-832, which I modified
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20 | ! for atomic forces instead of simple derivatives (see Lavery R,
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21 | ! Sklenar H, Zakrzewska K, Pullman B, J Biomol Struct Dyn v3
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22 | ! 989-1014 1986)
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23 | !
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24 | ! CALLS: gdtshe
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25 | ! ......................................................................
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26 |
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27 | include 'INCL.H'
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28 |
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29 | dimension xfat(mxat),yfat(mxat),zfat(mxat),
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30 | & xfvr(mxvr),yfvr(mxvr),zfvr(mxvr),
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31 | & xfrvr(mxvr),yfrvr(mxvr),zfrvr(mxvr)
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32 |
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33 |
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34 | eyel=0.d0
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35 | eyvw=0.d0
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36 | eyhb=0.d0
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37 | eyvr=0.d0
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38 | eysm=0.d0
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39 |
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40 | ntlvr=nvrml(nml)
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41 | if (ntlvr.eq.0) then
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42 | write (*,'(a,i4)')
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43 | & ' opeshe> No variables defined in molecule #',nml
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44 | return
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45 | endif
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46 |
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47 | ifivr=ivrml1(nml)
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48 | ilavr=ifivr+ntlvr-1
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49 |
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50 | do i=ifivr,ilavr
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51 | gdeyvr(i)=0.d0
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52 | xfvr(i)=0.d0
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53 | yfvr(i)=0.d0
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54 | zfvr(i)=0.d0
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55 | xfrvr(i)=0.d0
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56 | yfrvr(i)=0.d0
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57 | zfrvr(i)=0.d0
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58 | enddo
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59 |
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60 | do i=iatrs1(irsml1(nml)),iatrs2(irsml2(nml))
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61 | xfat(i)=0.d0
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62 | yfat(i)=0.d0
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63 | zfat(i)=0.d0
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64 | enddo
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65 |
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66 | i1s=imsml1(nml)+nmsml(nml)
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67 | i1a=iadml1(nml)+nadml(nml)
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68 |
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69 | do io=ilavr,ifivr,-1 ! ______ loop over variables in desc. order
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70 |
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71 | iv=iorvr(io) ! index of var.
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72 |
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73 | ia=iatvr(iv) ! prim.mv.at
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74 | ib=iowat(ia) ! base
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75 |
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76 | xb=xat(ib)
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77 | yb=yat(ib)
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78 | zb=zat(ib)
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79 |
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80 | it=ityvr(iv) ! type
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81 | ic=iclvr(iv) ! class
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82 |
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83 | fvr=0.d0
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84 |
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85 | if (it.eq.3) then ! torsion
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86 |
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87 | ex=xtoat(ib)
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88 | ey=ytoat(ib)
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89 | ez=ztoat(ib)
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90 |
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91 | vr=toat(ia)
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92 | e0=e0to(ic)
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93 |
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94 | if (e0.ne.0.d0) then
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95 | vrn=vr*rnto(ic)
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96 | eyvr=eyvr+e0*(1.d0+sgto(ic)*cos(vrn))
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97 | fvr=esnto(ic)*sin(vrn) ! FORCE from variable
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98 | endif
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99 |
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100 | elseif (it.eq.2) then ! b.angle
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101 |
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102 | ex=xbaat(ia)
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103 | ey=ybaat(ia)
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104 | ez=zbaat(ia)
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105 |
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106 | vr=baat(ia)
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107 |
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108 | elseif (it.eq.1) then ! b.length
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109 |
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110 | ex=xtoat(ia)
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111 | ey=ytoat(ia)
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112 | ez=ztoat(ia)
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113 |
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114 | vr=blat(ia)
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115 |
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116 | endif
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117 |
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118 | ! ============================================ Energies & Atomic forces
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119 |
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120 | xfiv=0.d0
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121 | yfiv=0.d0
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122 | zfiv=0.d0
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123 | xfriv=0.d0
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124 | yfriv=0.d0
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125 | zfriv=0.d0
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126 |
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127 | i2s=i1s-1 ! last m.s per 'iv'
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128 | i1s=imsvr1(iv) ! 1st m.s
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129 |
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130 | do ims=i1s,i2s ! __ loop over m.s
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131 |
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132 | i1=latms1(ims)
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133 | i2=latms2(ims)
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134 |
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135 | do i=i1,i2 ! __ loop over atoms i ===================
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136 |
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137 | ity=ityat(i)
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138 | cqi=conv*cgat(i)
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139 |
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140 | xi=xat(i)
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141 | yi=yat(i)
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142 | zi=zat(i)
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143 |
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144 | xfi=xfat(i)
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145 | yfi=yfat(i)
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146 | zfi=zfat(i)
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147 |
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148 | do ivw=ivwat1(i),ivwat2(i) ! loop over vdW-domains of 'i'
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149 |
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150 | do j=lvwat1(ivw),lvwat2(ivw) ! atoms j
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151 |
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152 | jty=ityat(j)
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153 |
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154 | xij=xat(j)-xi
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155 | yij=yat(j)-yi
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156 | zij=zat(j)-zi
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157 |
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158 | rij2=xij*xij+yij*yij+zij*zij
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159 | rij4=rij2*rij2
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160 | rij6=rij4*rij2
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161 | rij = sqrt(rij2)
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162 |
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163 | if (epsd) then
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164 |
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165 | sr=slp*rij
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166 | sr2=sr*sr
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167 | xsr=(plt-1.d0)*exp(-sr)/2.d0
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168 | ep=plt-(sr2+2.d0*sr+2.d0)*xsr
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169 | eel=cqi*cgat(j)/(rij*ep)
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170 | deel=eel+cqi*cgat(j)*(slp*sr2*xsr)/(ep*ep)
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171 |
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172 | else
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173 |
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174 | eel=cqi*cgat(j)/rij
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175 | deel=eel
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176 |
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177 | endif
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178 |
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179 | eyel=eyel+eel
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180 |
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181 | if (ihbty(ity,jty).ne.0) then
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182 | eyrp=ahb(ity,jty)/(rij6*rij6)
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183 | eyds=chb(ity,jty)/(rij6*rij4)
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184 | eyhb=eyhb+eyrp-eyds
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185 | c=(-12.d0*eyrp+10.d0*eyds-deel)/rij2
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186 | else
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187 | eyrp=aij(ity,jty)/(rij6*rij6)
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188 | eyds=cij(ity,jty)/rij6
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189 | eyvw=eyvw+eyrp-eyds
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190 | c=(-12.d0*eyrp+6.d0*eyds-deel)/rij2
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191 | endif
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192 |
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193 | xfji=c*xij
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194 | yfji=c*yij
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195 | zfji=c*zij
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196 |
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197 | xfi=xfi+xfji
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198 | yfi=yfi+yfji
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199 | zfi=zfi+zfji
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200 |
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201 | xfat(j)=xfat(j)-xfji
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202 | yfat(j)=yfat(j)-yfji
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203 | zfat(j)=zfat(j)-zfji
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204 |
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205 | enddo ! ... atoms j
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206 | enddo ! ... vdW-domains of i
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207 |
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208 | do i14=i14at1(i),i14at2(i) ! loop over 1-4 partn. of 'i'
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209 | j=l14at(i14)
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210 |
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211 | jty=ityat(j)
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212 |
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213 | xij=xat(j)-xi
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214 | yij=yat(j)-yi
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215 | zij=zat(j)-zi
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216 |
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217 | rij2=xij*xij+yij*yij+zij*zij
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218 | rij4=rij2*rij2
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219 | rij6=rij4*rij2
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220 | rij = sqrt(rij2)
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221 |
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222 | if (epsd) then
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223 |
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224 | sr=slp*rij
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225 | sr2=sr*sr
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226 | xsr=(plt-1.d0)*exp(-sr)/2.d0
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227 | ep=plt-(sr2+2.d0*sr+2.d0)*xsr
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228 | eel=cqi*cgat(j)/(rij*ep)
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229 | deel=eel+cqi*cgat(j)*(slp*sr2*xsr)/(ep*ep)
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230 |
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231 | else
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232 |
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233 | eel=cqi*cgat(j)/rij
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234 | deel=eel
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235 |
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236 | end if
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237 |
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238 | eyel=eyel+eel
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239 |
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240 | if (ihbty(ity,jty).ne.0) then
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241 | eyrp=ahb(ity,jty)/(rij6*rij6)
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242 | eyds=chb(ity,jty)/(rij6*rij4)
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243 | eyhb=eyhb+eyrp-eyds
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244 | c=(-12.d0*eyrp+10.d0*eyds-deel)/rij2
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245 | else
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246 | eyrp=a14(ity,jty)/(rij6*rij6)
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247 | eyds=cij(ity,jty)/rij6
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248 | eyvw=eyvw+eyrp-eyds
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249 | c=(-12.d0*eyrp+6.d0*eyds-deel)/rij2
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250 | endif
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251 |
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252 | xfji=c*xij
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253 | yfji=c*yij
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254 | zfji=c*zij
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255 |
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256 | xfi=xfi+xfji
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257 | yfi=yfi+yfji
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258 | zfi=zfi+zfji
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259 |
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260 | xfat(j)=xfat(j)-xfji
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261 | yfat(j)=yfat(j)-yfji
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262 | zfat(j)=zfat(j)-zfji
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263 |
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264 | enddo ! ... 1-4-partners of i
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265 |
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266 | xfat(i)=xfi
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267 | yfat(i)=yfi
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268 | zfat(i)=zfi
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269 |
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270 | xfiv=xfiv + xfi
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271 | yfiv=yfiv + yfi
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272 | zfiv=zfiv + zfi
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273 |
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274 | xfriv=xfriv + yfi*zi-zfi*yi
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275 | yfriv=yfriv + zfi*xi-xfi*zi
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276 | zfriv=zfriv + xfi*yi-yfi*xi
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277 |
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278 | enddo ! ... atoms i
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279 | enddo ! ... m.s.
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280 |
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281 | i2a=i1a-1 ! last 'added' var.
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282 | i1a=iadvr1(iv) ! 1st 'added' var.
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283 |
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284 | do iad=i1a,i2a
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285 | lad=ladvr(iad)
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286 |
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287 | xfiv=xfiv+xfvr(lad)
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288 | yfiv=yfiv+yfvr(lad)
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289 | zfiv=zfiv+zfvr(lad)
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290 | xfriv=xfriv+xfrvr(lad)
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291 | yfriv=yfriv+yfrvr(lad)
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292 | zfriv=zfriv+zfrvr(lad)
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293 | enddo
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294 |
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295 | xfvr(iv)=xfiv
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296 | yfvr(iv)=yfiv
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297 | zfvr(iv)=zfiv
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298 | xfrvr(iv)=xfriv
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299 | yfrvr(iv)=yfriv
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300 | zfrvr(iv)=zfriv
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301 |
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302 | if (it.eq.3.or.it.eq.2) then ! torsion,b.angle
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303 |
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304 | gdeyvr(iv)= (ey*zb-ez*yb)*xfiv+(ez*xb-ex*zb)*yfiv+
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305 | & (ex*yb-ey*xb)*zfiv
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306 | & +ex*xfriv+ey*yfriv+ez*zfriv -fvr
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307 |
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308 | elseif (it.eq.1) then ! b.length
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309 |
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310 | gdeyvr(iv)= -(ex*xfiv+ey*yfiv+ez*zfiv) -fvr
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311 |
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312 | endif
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313 |
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314 | if (tesgrd) call gdtshe(nml,iv)
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315 |
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316 | enddo ! ... variables
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317 |
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318 | eysm= eyel+eyvw+eyhb+eyvr
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319 |
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320 | return
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321 | end
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322 | ! *****************************
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323 | subroutine gdtshe(nml,iv)
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324 |
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325 | ! .....................................................................
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326 | ! PURPOSE: calculate partial derivative of internal energy for molecule
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327 | ! 'nml' vs. variable 'iv' NUMERICALLY and compare with
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328 | ! its value obtained analytically
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329 | !
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330 | ! CALLS: setvar, enyshe
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331 | ! .....................................................................
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332 |
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333 | include 'INCL.H'
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334 |
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335 | parameter (del=1.d-7)
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336 |
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337 | dimension vlvrx(mxvr)
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338 |
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339 | ! ____________________________ get & save values of variables
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340 | do i=1,ivrml1(ntlml)+nvrml(ntlml)-1
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341 | it=ityvr(i) ! type
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342 | if (it.eq.3) then ! torsion
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343 | vlvrx(i)=toat(iatvr(i))
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344 | elseif (it.eq.2) then ! b.angle
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345 | vlvrx(i)=baat(iatvr(i))
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346 | elseif (it.eq.1) then ! b.length
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347 | vlvrx(i)=blat(iatvr(i))
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348 | endif
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349 | enddo
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350 |
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351 | ovr=vlvrx(iv)
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352 | eyol=enyshe(nml)
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353 |
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354 | vlvrx(iv)=ovr+del ! change variable 'iv' by 'del'
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355 | call setvar(nml,vlvrx)
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356 | eynw=enyshe(nml) ! new energy
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357 |
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358 | gdn=(eynw-eyol)/del ! numerical derivative
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359 | gda=gdeyvr(iv) ! analytical der.
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360 |
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361 | write (*,'(1x,2a,2(e12.6,a))') nmvr(iv),': ',gda,' (',
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362 | & abs(gda-gdn),')'
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363 |
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364 | ! _________________________ restore
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365 | vlvrx(iv)=ovr
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366 | call setvar(nml,vlvrx)
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367 |
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368 | return
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369 | end
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370 |
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