Accurate Maximum-Margin Training for Parsing With Context-Free Grammars
Accurate Maximum-Margin Training for Parsing With Context-Free Grammars
复制标题
用于上下文无关语法解析的准确最大间隔训练
DOI:
10.1109/tnnls.2015.2497149
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发表时间:
2017
影响因子:
10.4
通讯作者:
K.-R. Müller
中科院分区:
文献类型:
--
作者:
A. Bauer;M. Braun;K.-R. Müller
The task of natural language parsing can naturally be embedded in the maximum-margin framework for structured output prediction using an appropriate joint feature map and a suitable structured loss function. While there are efficient learning algorithms based on the cutting-plane method for optimizing the resulting quadratic objective with potentially exponential number of linear constraints, their efficiency crucially depends on the inference algorithms used to infer the most violated constraint in a current iteration. In this paper, we derive an extension of the well-known Cocke-Kasami-Younger (CKY) algorithm used for parsing with probabilistic context-free grammars for the case of loss-augmented inference enabling an effective training in the cutting-plane approach. The resulting algorithm is guaranteed to find an optimal solution in polynomial time exceeding the running time of the CKY algorithm by a term, which only depends on the number of possible loss values. In order to demonstrate the feasibility of the presented algorithm, we perform a set of experiments for parsing English sentences.
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DOI:
--
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1993
期刊:
Conference of the European Chapter of the Association for Computational Linguistics
影响因子:
--
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1988
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影响因子:
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Inf. Sci.
影响因子:
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DOI:
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2012
期刊:
International Conference on Artificial Intelligence and Statistics
影响因子:
--
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