[TCOD] Questions still left regarding TCOD dictionaries

Linas Vilciauskas linas.vilciauskas at nyu.edu
Thu Nov 6 17:50:41 UTC 2014


Hi Saulius and Torbjoern,
What about RMSD of forces? Usually one uses two parameters for the
convergence, Max Force and RMS Force.

Cheers,
Linas

On Thu, Nov 6, 2014 at 12:43 PM, Björkman Torbjörn <
torbjorn.bjorkman at aalto.fi> wrote:

> Hi Saulius,
>
> > "These data items describe residual forces on atoms in the final
> > structure. For a converged computation of a stable structure these
> > should be close to 0.
> >
> > A residual force on a given atom should be computed with all other
> > parameters, including all other atom positions, fixed. The force
> > components for each atom are given as partial derivatives \d E/\d x,
> > \d E/\d y and \d E/\d z, where E is the total energy of the system and
> > x, y, and z are coordinates of the atom for which residual force is
> > computed (the \d is the partial derivative sign)."
> >
> > Is this OK? Or are other definitions used in fact?
>
> This looks good and correct. Specifically, the convergence parameter is
> usually the maximal residual force on any one atom, this is what I think we
> should demand should be given.
>
> Regards,
> Torbjörn
>
>
> ---
> Torbjörn Björkman, PhD
> COMP, Aalto University School of Science
> Espoo, Finland
>
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