(2) Experimental Results

The performance of information retrieval is shown in Fig.3　and, from this result, the value of $F$ parameter was calculated as shown in Fig.4.

From these results, we can make the following observations:

(1)

At any point of similarity, S-VSM yields higher recall performance but lower precision compared to W-VSM.

(2)

Maximum value of $F$ is almost the same for both methods.

図 3: Similarity and Performance of Information Retrieval

図 4: Similarity and F value