Slide 26
Slide 26 text
"11&/%*9#.
̶Recruit Communications Co., Ltd.̶
score
(
D, Q
) =
n
X
i=1
IDF(
qi) f
(
qi, D
)(
k1 + 1)
f
(
qi, D
) +
k1(1
b
+
b
|D|
avgdl
)
f(qi, D)
avgdl
IDF
(
qi) = log
N n
(
qi) + 0
.
5
n
(
qi) + 0
.
5
୯ޠRJͷυΩϡϝϯτ%ͷUFSNGSFRVFODZ
υΩϡϝϯτͷฏۉ୯ޠ
N n(qi)
υΩϡϝϯτ ୯ޠRJΛؚΉυΩϡϝϯτ