NIST - definition. What is NIST
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NIST      
National Institute of Standards and Technology (Reference: org., USA)
NIST (metric)         
NIST is a method for evaluating the quality of text which has been translated using machine translation. Its name comes from the US National Institute of Standards and Technology.

ويكيبيديا

NIST (metric)

NIST is a method for evaluating the quality of text which has been translated using machine translation. Its name comes from the US National Institute of Standards and Technology.

It is based on the BLEU metric, but with some alterations. Where BLEU simply calculates n-gram precision adding equal weight to each one, NIST also calculates how informative a particular n-gram is. That is to say when a correct n-gram is found, the rarer that n-gram is, the more weight it will be given.

For example, if the bigram "on the" is correctly matched, it will receive lower weight than the correct matching of bigram "interesting calculations", as this is less likely to occur.

NIST also differs from BLEU in its calculation of the brevity penalty insofar as small variations in translation length do not impact the overall score as much.

أمثلة من مجموعة نصية لـ٪ 1
1. "NIST is positioned to play a key role in advancing our nation‘s innovation and competitiveness," NIST Director William Jeffrey said in the release.
2. By Valeria Korchagina Staff Writer NIST Evans with George W.
3. The DOE release and the NIST release are available on issuing agencies‘ Web sites.
4. Unofficially good The results of the NIST evaluation won‘t be released until later this month.
5. Lykke of the NIST, Gareth Wyn Parry of the Nuclear Regulatory Commission, Paul D.