Database Reference
In-Depth Information
Table 7.
Evaluation of the Euclidean distance (TREC 9, 1431 pairs in total; Overall
quality(Q)=D rate/R rate; T: Threshold)
ED(L)
ED(C)
T
D rate E rate
Q
D rate E rate
Q
0.1% 89.2% 17.0%
5.2 82.8% 29.4%
2.8
0.2% 83.0% 13.1%
6.3 71.7% 23.9%
3.0
0.3% 78.8% 10.7%
7.4 62.0% 18.9%
3.3
0.4% 74.5%
8.6%
8.7 52.8% 15.2%
3.5
0.5% 70.7%
7.2%
9.9 44.9% 11.7%
3.8
0.6% 65.9%
5.9% 11.1 38.9%
8.5%
4.6
0.7% 61.7%
4.9% 12.6 34.1%
6.1%
5.6
0.8% 57.9%
4.0% 14.5 29.0%
4.6%
6.4
0.9% 52.9%
3.0% 17.7 26.8%
3.6%
7.5
1.0% 49.6%
2.5% 19.9 25.4%
1.8% 13.4
Table 8.
Evaluation of the Euclidean distance (TREC 9, 1431 pairs in total; Overall
quality(Q)=D rate/R rate; T: Threshold)
AP
RP
NDCG
P10
T
D rate E rate Q D rate E rate Q D rate E rate
Q
D rate E rate Q
6%
82.5% 22.7% 3.6 83.9% 18.9% 4.4 80.2% 19.0%
4.2 81.5% 17.5% 4.7
9%
75.3% 20.2% 3.7 76.9% 17.0% 4.5 71.1% 15.4%
4.6 74.6% 16.1% 4.6
12% 70.2% 18.2% 3.9 69.8% 15.0% 4.6 64.3% 12.7%
5.1 69.3% 14.8% 4.7
15% 64.1% 16.0% 4.0 63.8% 13.0% 4.9 57.8% 10.5%
5.5 65.7% 13.6% 4.6
18% 59.2% 14.3% 4.1 58.7% 11.6% 5.1 51.9%
8.7%
6.0 61.9% 12.6% 4.9
21% 54.6% 12.7% 4.3 53.2% 10.3% 5.2 46.4%
6.9%
6.8 59.6% 11.7% 5.1
24% 50.2% 11.3% 4.4 49.8%
9.4% 5.3 42.1%
5.9%
7.1 57.1% 11.2% 5.1
27% 50.0% 10.2% 4.6 46.3%
8.2% 5.6 39.2%
4.9%
8.1 53.7%
9.9% 5.4
30% 45.0%
9.5% 4.7 43.9%
7.6% 5.8 35.8%
3.9%
9.2 49.6%
9.1% 5.4
33% 42.8%
8.9% 4.8 41.7%
7.2% 5.8 32.9%
3.3% 10.1 46.0%
8.6% 5.4
Table 9.
Evaluation of the Euclidean distance (TREC 2001, 561 pairs in total; Overall
quality(Q)=D rate/R rate; T: Threshold)
ED(L) ED(C)
T
D rate E rate Q D rate E rate Q
0.1% 88.9% 30.5% 2.9 92.3% 36.3% 2.5
0.2% 80.0% 26.2% 3.1 87.0% 34.5% 2.5
0.3% 68.1% 22.9% 2.9 81.5% 32.7% 2.5
0.4% 59.9% 20.2% 3.0 75.9% 31.2% 2.4
0.5% 51.2% 17.7% 2.9 71.3% 29.6% 2.4
0.6% 44.9% 15.8% 2.8 66.1% 27.8% 2.4
0.7% 40.3% 14.5% 2.8 59.9% 26.0% 2.3
0.8% 34.8% 13.2% 2.6 52.9% 24.2% 2.2
0.9% 29.8% 11.7% 2.6 47.1% 22.7% 2.1
1.0% 25.0% 10.2% 2.5 43.5% 21.4% 2.0
