NP - 北京大学中国语言学研究中心
NP - 北京大学中国语言学研究中心
NP - 北京大学中国语言学研究中心
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
规则的概率<br />
文法中每条规则的概率,可以用下面公式估计:<br />
P(<br />
A<br />
→<br />
ξ )<br />
S<strong>NP</strong> VP<br />
VP V <strong>NP</strong><br />
<strong>NP</strong> N<br />
<strong>NP</strong> <strong>NP</strong> 的 <strong>NP</strong><br />
<strong>NP</strong> VP 的 <strong>NP</strong><br />
P(<br />
<strong>NP</strong> →<br />
N ) =<br />
=<br />
∑<br />
γ<br />
Number ( A → ξ )<br />
Number ( A → γ )<br />
S<strong>NP</strong> VP P(S<strong>NP</strong> VP)<br />
VP V <strong>NP</strong> P(VPV <strong>NP</strong>)<br />
<strong>NP</strong> N P(<strong>NP</strong>N)<br />
<strong>NP</strong> <strong>NP</strong> 的 <strong>NP</strong> P(<strong>NP</strong><strong>NP</strong> 的 <strong>NP</strong>)<br />
<strong>NP</strong> VP 的 <strong>NP</strong> P(<strong>NP</strong>VP 的 <strong>NP</strong>)<br />
Number(<br />
<strong>NP</strong> → N )<br />
Number(<br />
<strong>NP</strong> → N ) + Number(<br />
<strong>NP</strong> → <strong>NP</strong>的<br />
<strong>NP</strong>)<br />
+ Number(<br />
<strong>NP</strong> → VP的<br />
<strong>NP</strong>)<br />
19
Change language