A Top-down Model for Character-level Chinese Dependency Parsing

来源 :第十八届中国计算语言学大会暨中国中文信息学会2019学术年会 | 被引量 : 0次 | 上传用户:maferhipo
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
  This paper proposes a novel transition-based algorithm for character-level Chinese dependency parsing that straightforwardly models the dependen-cy tree in a top-down manner.Based on the stack-pointer parser,we joint Chi-nese word segmentation,part-of-speech tagging,and dependency parsing in a new way.We recursively build the character-based dependency tree from root to leaf in a depth-first fashion,by searching for candidate dependents through the sentence and predicting relation type at each step.We introduce intra-word dependencies into the relation types for word segmentation,and the inter-word dependencies with POS tags for part-of-speech tagging.Since the top-down model provides a global view of an input sentences,the information of the whole sentence and all previously generated arcs are available for action deci-sions,and all characters of the sentence are considered as candidate dependen-cies.Experimental results on the Penn Chinese Treebank(CTB)show that the proposed model outperformed existing neural joint parsers by 0.81%on de-pendency parsing,and achieved the F1-scores of 95.97%,91.72%,80.25%for Chinese word segmentation,part-of-speech tagging,and dependency parsing.
其他文献
学位
Learning multi-lingual sentence embeddings usually requires large scale of parallel sentences which are difficult to obtain.We propose a novel self-learning approach which is capable of learning multi
学位
Online news platforms have attracted massive users to read digital news online.The demographic information of these users such as gender is critical for these platforms to provide personalized service
The Chinese Semantic Dependency Graph(CSDG)Parsing reveals the deep and fine-grained semantic relationship of Chinese sentences,and the parsing results have a great help to the downstream NLP tasks.Ho
Event detection(ED)task aims to automatically identify trigger words from unstructured text.In recent years,neural models with attention mechanism have achieved great success on this task.However,exis
学位
学位
Term translation of Chinese historical classics is very difficult and time-consuming work,and using term alignment methods to extract term translation pairs is of great help for historical term transl
The long-standing automobile e-commerce websites in China have ac-cumulated huge amounts of auto reviews,and extracting keyphrases of these re-views can assist researchers and practitioners in obtaini