Kay, L.; Newman, N.; Youtie, J.; Porter, A.L.; Rafols, I.: Patent overlay mapping : visualizing technological distance (2014)
0.01
0.011344733 = product of:
0.022689465 = sum of:
0.022689465 = product of:
0.04537893 = sum of:
0.04537893 = weight(_text_:l in 1543) [ClassicSimilarity], result of:
0.04537893 = score(doc=1543,freq=2.0), product of:
0.20667124 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.05199731 = queryNorm
0.2195706 = fieldWeight in 1543, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.0390625 = fieldNorm(doc=1543)
0.5 = coord(1/2)
0.5 = coord(1/2)