Robertson, S.E.: Theories and models in information retrieval (1977)
0.01
0.009407777 = product of:
0.018815555 = sum of:
0.018815555 = product of:
0.056446664 = sum of:
0.056446664 = weight(_text_:i in 1844) [ClassicSimilarity], result of:
0.056446664 = score(doc=1844,freq=2.0), product of:
0.16931784 = queryWeight, product of:
3.7717297 = idf(docFreq=2765, maxDocs=44218)
0.044891298 = queryNorm
0.33337694 = fieldWeight in 1844, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.7717297 = idf(docFreq=2765, maxDocs=44218)
0.0625 = fieldNorm(doc=1844)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Abstract
- This paper is concerned with recent work in the theory of information retrieval. More particularly, it is concerned with theories which tackle the problem of retrieval performance, in a sense which will be explained. The aim is not an exhaustive survey of such work; rather it is an analysis and synthesis of those contributions which I feel to be important or find interesting