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Table 6 

BLEU, WER, and KSMR results for the Europarl test corpora using conventional (batch learning without retraining) and online SMT systems. Log-linear weights were adjusted via MERT. The average online learning time (LT) in seconds is shown for the online system.

CorpusSMT systemBLEUWERKSMRLT (sec)
Eng-Spa conventional 21.0±0.5 65.4±0.7 45.9±0.4 
online 22.5±0.6 63.4±0.7 44.7±0.4 0.2 
Eng-Fre conventional 21.2±0.6 64.4±0.7 44.4±0.5 
online 22.6±0.6 63.2±0.7 43.2±0.5 0.2 
Eng-Ger conventional 13.1±0.5 73.8±0.7 49.2±0.4 
online 14.1±0.5 72.8±0.7 48.0±0.4 0.2 
CorpusSMT systemBLEUWERKSMRLT (sec)
Eng-Spa conventional 21.0±0.5 65.4±0.7 45.9±0.4 
online 22.5±0.6 63.4±0.7 44.7±0.4 0.2 
Eng-Fre conventional 21.2±0.6 64.4±0.7 44.4±0.5 
online 22.6±0.6 63.2±0.7 43.2±0.5 0.2 
Eng-Ger conventional 13.1±0.5 73.8±0.7 49.2±0.4 
online 14.1±0.5 72.8±0.7 48.0±0.4 0.2 
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