Yiqun, W.; Zhonghui, Z.; Li, Z.: Experimental study of machine factors and cognitive abilities of users (1998)
0.00
0.0047872663 = product of:
0.011968166 = sum of:
0.0055434983 = weight(_text_:a in 5225) [ClassicSimilarity], result of:
0.0055434983 = score(doc=5225,freq=2.0), product of:
0.054392863 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.047173154 = queryNorm
0.10191591 = fieldWeight in 5225, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.0625 = fieldNorm(doc=5225)
0.006424668 = product of:
0.012849336 = sum of:
0.012849336 = weight(_text_:information in 5225) [ClassicSimilarity], result of:
0.012849336 = score(doc=5225,freq=2.0), product of:
0.08281143 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.047173154 = queryNorm
0.1551638 = fieldWeight in 5225, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.0625 = fieldNorm(doc=5225)
0.5 = coord(1/2)
0.4 = coord(2/5)
- Source
- Journal of the China Society for Scientific and Technical Information. 17(1998) no.6, S.412-418
- Type
- a