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Mixed probabilistic and deterministic dependency parsing

机译:概率和确定性相依混合解析

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This work describes a new multi-stage dependency parsing framework that relies on stochastic probabilistic models, such as the Maximum-Entropy Markov Model. It proposes an original compromise between locally optimal parsers with global features, and globally optimal models with local features. The main advantage of this framework is its ability to choose the desired compromise over the full range between both extreme models, by modifying the topology of the underlying automaton. Thanks to its probabilistic definition, it further gives access to several powerful classical probabilistic algorithms, and in particular to marginalization and Bayesian inference of, for instance, missing or corrupted observations. The rank-1 model has been evaluated on a French broadcast news parsing task, and has obtained comparable performance to state-of-the-art transition-based parsers.
机译:这项工作描述了一个新的多阶段依赖项解析框架,该框架依赖于随机概率模型,例如最大熵马尔可夫模型。它提出了在具有全局特征的局部最优分析器与具有局部特征的全局最优模型之间的原始折衷方案。该框架的主要优点是能够通过修改底层自动机的拓扑结构,在两个极端模型之间的整个范围内选择所需的折衷方案。归因于其概率定义,它进一步提供了几种强大的经典概率算法的访问权限,尤其是边缘化和贝叶斯推断(例如丢失或损坏的观测值)的访问。等级1模型已在法国广播新闻解析任务中进行了评估,并获得了与基于过渡的最新解析器相当的性能。

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