Service Recommendation with High Accuracy and Diversity

Algorithm 2: Calculate TF-IDF weight vectors of web services.

Input:

 WS_u1, WS_u2,…, WS_u(M-L): web services in set P.

 WS₁, WS₂,…, WS_N: candidate web services.

Output:

 : weight vectors of services in set P.

 : weight vectors of candidate services.

1. Count ()

2. for to do

3. for to do//assume there are words in the corpus

4.  if

5.   then freq(, )

6.   Count

7.   Count

8.   Calculate according to equation (4)

9.  end if

10. end for

11.end for

12.

13.Calculate candidate services’ TF-IDF weight vectors

14.return,

Algorithm 2: Calculate TF-IDF weight vectors of web services.