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。
人工智能 计算语言学 释文 probabilistic context free grammar, PCFG 概率上下文无关文法
- urban surface water balance
- urban survey
- urban survey unit
- urban sustainability
- urban sustainable development
- urban system
- urban system function structure in the administration area of city
- urban system planning
- urban system planning in the administration area of city
- Urban System Planning of the Zhujiang River Delta
- urban system scale structure in the administration area of city
- urban systems engineering
- urban system spatial pattern in the administration area of city
- urban system theory
- urban thermal environment
- urban topographic survey
- urban traffic
- urban traffic construction management system
- urban traffic management platform
- urban traffic management system
- urban traffic system
- urban traffic tunnel fire
- urban transportation
- urban transportation demand management
- urban transportation development policy