USPEX 10.5 manual
USPEX 10.5 manual : Input options. The INPUT.txt file : Survival of the fittest and selection

4.3 Survival of the fittest and selection

$\triangleright $ variable blue bestFrac

Meaning: Fraction of the current generation that shall be used to produce the next generation.

Default: 0.7

Format:

0.7 : bestFrac

NOTE: This is an important parameter, values between 0.5–0.8 are reasonable.

$\triangleright $ variable blue keepBestHM

Meaning: Defines how many best structures will survive into the next generation.

Default: 0.15$\times $populationSize

Format:

3 : keepBestHM

$\triangleright $ variable blue reoptOld

Meaning: Defines re-relaxation of the survived structures. If reoptOld=0, these structures will be unchanged while if reoptOld=1, they will be re-relaxed again. Usually reoptOld=0 is a reasonable choice (provided your structure relaxation was high quality).

Default: 0

Format:

1 : reoptOld

USPEX 10.5 manual