Beyond clicks dwell time for personalization
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akihiko-watanabe -
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Transcript of Beyond clicks dwell time for personalization
f(x)
ft(x) = Tt(x;⇥) + �
TX
t=1
�tTt(x;⇥t)
L(yi, fT (xi))
Tt(x;⇥t)
⇥̂ = argmin�
NX
i
wi(�Git � �tTt(xi;⇥))
�t = argmin�
NX
i
L(yi, ft�1(xi) + �T (xi, ✓))
I =
0
BBBBBB@
r11 r12 ... r1j ... r1Nr21 r22 ... r2j ... r2N... ...ri1 ri2 ... rij ... riN... ...rM1 rM2 ... rMj ... rMN
1
CCCCCCA
argminU,V
MX
i=1
X
ri,j<ri,k
Ui(Vj � Vk)T + �(|U |2 + |V |2)
I = U ⇥ V T r̂ij = Ui ⇥ V Tj
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