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I have some questions about the molecular dynamics simulation for VASP ,especial for the keyword SMASS .I have follow questions :
1.What does SMASS>0 stand for ? for example SMASS =1 or 2 ,what does it mean ?
2.What does SMASS=0 stand for ?I have read the manual ,but I don't understand its meaning ?
3.How to choose different number of the SMASS according to the different system?
4 Besides that , how control the damped factors of velocity by the SMASS ,when the damped molecular dynamics

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