“probabilistic context-free grammars”的概念、定义、翻译、参考文献-科学参考

单词	probabilistic context-free grammars
释义	probabilistic context-free grammars Encyclopedia 理学【基本概念】释 probabilistic context-free grammars; PCFG概率句法分析在上下文无关文法的基础上对每个规则加以概率限制，从而就可以求出一个句子的特定语法树的概率值的方法。又称概率上下文无关语法。
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