ML_MHIS
ML_MHIS = [integer]
Default: ML_MHIS = 10
Description: This tag sets the number of estimated errors stored in memory to determine the threshold for error estimation in the machine learning force field method for ML_ICRITERIA=1. For ML_ICRITERIA=2, the history length is 50 x ML_MHIS (or hard coded to 400).
The use of this tag in combination with the learning algorithms is described here: here.
ML_ICRITERIA=1: The ML code stores ML_MHIS errors from previous training steps: immediately after a re-training of the ML-FF, the estimated errors of the forces are reevaluated for the current structure (that was also just added as training structure). The average and the maximum error of the forces is stored in the history. After ML_MHIS updates of the force field, the threshold ML_CTIFOR is updated the first time and is then updated after every further update of the ML-FF. We recommend to read the section ML_ICRITERIA for further details.
ML_ICRITERIA=2: Averaging is performed over 50 x ML_MHIS error predictions. Every MD step is considered in the averaging (as opposed to above, where only structures after re-training are considered).
Related tags and articles
ML_LMLFF, ML_ICRITERIA, ML_CTIFOR, ML_CX, ML_CSLOPE, ML_CSIG