现代汉语计算语言模型中语言单位的频度—频级关系  

The Frequency Rank Relation of Language Units in Modern Chinese Computational Language Model

作　　者：关毅[1] 王晓龙[1] 张凯[1] 

机构地区：[1]哈尔滨工业大学计算机系自然语言理解研究室

出　　处：《中文信息学报》1999年第2期8-15,共8页Journal of Chinese Information Processing

基　　金：国家八六三项目资助

摘　　要：Ｚｉｐｆ定律是一个反映英文单词词频分布情况的普适性统计规律。我们通过实验发现，在现代汉语的字、词、二元对等等语言单位上，其频度与频级的关系也近似地遵循Ｚｉｐｆ定律，说明了Ｚｉｐｆ定律对于汉语的不同层次的语言单位也是普遍适用的。本文通过实验证实了Ｚｉｐｆ定律所反映的汉语语言单位频度—频级关系，并进而深入讨论了它对于汉语自然语言处理的各项技术。Zipf's law has been widely researched by the linguists and statisticians.The frequency of English words is the most famous example of Zipf's law .In this paper,by means of experiments,we show that Zipf's law is also available in many language structures of Chinese (Chinese character, Chinese word,Chinese word bigram,etc),And Zipf's law has great effect on many technologies of Chinese language processing, especially the construction of Chinese computational language model.

关 键 词：语言单位 汉语 计算语言模型 频度-频级关系 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]