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NP - 北京大学中国语言学研究中心

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21<br />

规则的概率(续)<br />

∑<br />

→<br />

→<br />

=<br />

→<br />

γ<br />

γ )<br />

(<br />

)<br />

(<br />

)<br />

(<br />

A<br />

Number<br />

C<br />

B<br />

A<br />

Number<br />

C<br />

B<br />

A<br />

P<br />

∑<br />

∑<br />

≤<br />

≤<br />

≤<br />

+<br />

≤<br />

<<br />

≤<br />

≤<br />

→<br />

=<br />

n<br />

j<br />

i<br />

j<br />

i<br />

j<br />

i<br />

,j<br />

k<br />

n<br />

j<br />

k<br />

i<br />

i,k<br />

j<br />

i<br />

A<br />

A<br />

C<br />

B<br />

BC<br />

P(A<br />

A<br />

1<br />

,<br />

,<br />

1<br />

1<br />

,<br />

)<br />

(<br />

)<br />

(<br />

)<br />

(<br />

)<br />

(<br />

)<br />

)<br />

(<br />

α<br />

β<br />

α<br />

α<br />

β<br />

公式②

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