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>Descriptor</H1
><DIV
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><H2
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><A
NAME="JOELIB.DESCRIPTORS.AUTOCORRELATION"
></A
>Moreau-Broto topological autocorrelation</H2
><P
>Moreau-Broto topological autocorrelation [<A
HREF="bibliography.html#BMV84"
>bmv84</A
>].
<DIV
CLASS="EQUATION"
><A
NAME="AEN8"
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><P
><B
>Equation 1. Moreau-Broto autocorrelation</B
></P
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SRC="formulas/autocorrelation.gif"
ALIGN="CENTER"></P
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>
where <SPAN
CLASS="bold"
><B
CLASS="EMPHASIS"
>d<SUB
>ij</SUB
></B
></SPAN
> is the topological distance between the atoms
<SPAN
CLASS="bold"
><B
CLASS="EMPHASIS"
>i</B
></SPAN
> and atom <SPAN
CLASS="bold"
><B
CLASS="EMPHASIS"
>j</B
></SPAN
>, <SPAN
CLASS="bold"
><B
CLASS="EMPHASIS"
>w<SUB
>i</SUB
></B
></SPAN
>
and <SPAN
CLASS="bold"
><B
CLASS="EMPHASIS"
>w<SUB
>j</SUB
></B
></SPAN
> are the atom properties of the atoms <SPAN
CLASS="bold"
><B
CLASS="EMPHASIS"
>i</B
></SPAN
> and
<SPAN
CLASS="bold"
><B
CLASS="EMPHASIS"
>j</B
></SPAN
>.</P
><P
>It must be mentioned that the autocorrelation is only a special case of the radial distribution function ().</P
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