Lecture 3 Modeling.pdf
Lecture 3 Modeling.pdf
Lecture 3 Modeling.pdf
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Sample query-documentsimilarity computation (Continued)• T 1 T 2 T 3T 1 1 0.5 0T 2 0.5 1 -0.2T 3 0 -0.2 1• similarity computations for correlated termssim(D 1 ,Q)=(2T 1 +3T 2 +5T 3 ) • (0T 1 +0T 2 +2T 3 )=4T 1 •T 3 +6T 2 •T 3 +10T 3 •T 3=-6*0.2+10*1=8.8sim(D 2 ,Q)=(3T 1 +7T 2 +1T 3 ) • (0T 1 +0T 2 +2T 3 )=6T 1 •T 3 +14T 2 •T 3 +2T 3 •T 3=-14*0.2+2*1=-0.8• D 1 is preferred3-22