摘要
给出了面向上下文无关语言的句法分析的一种计算机制:角色反演算法.这种机制通过引入句法范畴的角色这一概念以及相应的角色反演操作,用较小的空间代价在Chart算法中实现了较强的预读(look ahead)功能.这使其能节约大量的无用边,从而加速分析过程的推进.这种机制可以用于自然语言处理等多种应用领域.
A computational mechanism for context-free language parsing is proposed in this paper, which is called role inverse algorithm. The mechanism is based on the assignment of appropriate roles to categories according to their contexts. A kind of effectual 搇ook ahead?function is introduced into chart parsing by this mechanism at acceptable cost. As a result, lots of useless arcs in a chart can be avoided, so that a parsing process is accelerated. This mechanism can be used in many applications, such as natural language processing.
出处
《软件学报》
EI
CSCD
北大核心
2003年第3期328-333,共6页
Journal of Software
基金
Supported by the National Grand Fundamental Research 973 Program of China under Grant No.G1998030510 (国家重点基础研究发展规划(973))
