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Table 7 

BLEU, WER, and KSMR for the EMEA test corpora using conventional (batch learning without retraining), online, and online from scratch SMT systems, with models estimated by means of the Europarl training corpora. Log-linear weights were trained via MERT. The average online learning time (LT) in seconds is shown for the online system.

CorpusSMT systemBLEUWERKSMRLT (sec)
Eng-Spa conventional 24.0±0.8 64.0±0.9 49.1±0.6 
online 45.6±1.2 49.6±1.4 32.3±0.8 0.1 
online scratch 36.0±1.2 52.2±1.0 35.6±0.8 0.1 
Eng-Fre conventional 18.3±0.7 69.4±0.9 52.3±0.6 
online 39.7±1.3 53.9±1.3 33.7±0.8 0.1 
online scratch 30.0±0.2 59.5±1.1 41.2±0.8 0.1 
Eng-Ger conventional 17.7±0.8 77.8±1.3 55.3±0.6 
online 35.7±1.3 61.8±1.5 37.2±0.8 0.1 
online scratch 27.4±1.2 65.5±1.2 43.8±0.9 0.1 
CorpusSMT systemBLEUWERKSMRLT (sec)
Eng-Spa conventional 24.0±0.8 64.0±0.9 49.1±0.6 
online 45.6±1.2 49.6±1.4 32.3±0.8 0.1 
online scratch 36.0±1.2 52.2±1.0 35.6±0.8 0.1 
Eng-Fre conventional 18.3±0.7 69.4±0.9 52.3±0.6 
online 39.7±1.3 53.9±1.3 33.7±0.8 0.1 
online scratch 30.0±0.2 59.5±1.1 41.2±0.8 0.1 
Eng-Ger conventional 17.7±0.8 77.8±1.3 55.3±0.6 
online 35.7±1.3 61.8±1.5 37.2±0.8 0.1 
online scratch 27.4±1.2 65.5±1.2 43.8±0.9 0.1 
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