Name of Iran their country "Arya", "Iran", "Iranshahr", "Iranzamin" (Land of Iran), "Aryānām" (the equivalent of "Iran" in the proto-Iranian language) or its equivalents. The term "Arya" has been used by the Iranian people, as well as by the rulers and emperors of Iran, from the time of the Avesta. Evidently from the time of the Sassanids (226–651 CE) Iranians have called it "Iran", meaning "the land of Aryans" and "Iranshahr". In Middle Persian sources, the name "Arya" and "Iran" is used for the pre-Sassanid Iranian empires as well as the Sassanid empire. As an example, the use of the name "Iran" for
Evaluation of machine translation highly with human judgments of quality at the corpus level. BLEU uses a modified form of precision to compare a candidate translation against multiple reference translations. The metric modifies simple precision since machine translation systems have been known to generate more words than appear in a reference text. No other machine translation metric is yet to significantly outperform BLEU with respect to correlation with human judgment across language pairs. The NIST metric 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