Suakkaphong, N.; Zhang, Z.; Chen, H.: Disease named entity recognition using semisupervised learning and conditional random fields (2011)
0.02
0.017619401 = product of:
0.035238802 = sum of:
0.035238802 = product of:
0.070477605 = sum of:
0.070477605 = weight(_text_:z in 4367) [ClassicSimilarity], result of:
0.070477605 = score(doc=4367,freq=2.0), product of:
0.23903055 = queryWeight, product of:
5.337313 = idf(docFreq=577, maxDocs=44218)
0.04478481 = queryNorm
0.29484767 = fieldWeight in 4367, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.337313 = idf(docFreq=577, maxDocs=44218)
0.0390625 = fieldNorm(doc=4367)
0.5 = coord(1/2)
0.5 = coord(1/2)