K = 1

K = 2

......

K = K

G = 1

Π1|1

Π1|2

......

Π1|K

G = 2

Π2|1

Π2|2

......

Π2|K

......

......

......

......

......

G = G

ΠG|1

ΠG|2

......

ΠG|K

总和

${\displaystyle {\sum }_{g=1}^G{\pi }_{g|1}}=1$

${\displaystyle {\sum }_{g=1}^G{\pi }_{g|2}}=1$

......

${\displaystyle {\sum }_{g=1}^G{\pi }_{g|k}}=1$