Qun Liu

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Philipp Koehn349
Franz Josef Och254
Kishore Papineni213
Salim Roukos212
Todd Ward206
69Yang Liu
64Min Zhang
54Andy Way
49Quan Hao
48Deyi Xiong

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Tree-to-String Alignment Template for Statistical Machine Translation
We present a novel translation model based on tree-to-string alignment template (TAT) which describes the alignment between a source parse tree and a target string. A TAT is capable of generating both terminals and non-terminals and performing reordering at both low and high levels. The model is linguistically syntax-based because TATs are extracted… (More)
Maximum Entropy Based Phrase Reordering Model for Statistical Machine Translation
We propose a novel reordering model for phrase-based statistical machine translation (SMT) that uses a maximum entropy (MaxEnt) model to predicate reorderings of neighbor blocks (phrase pairs). The model provides content-dependent, hierarchical phrasal reordering with generalization based on features automatically learned from a real-world bitext. We… (More)
Forest-Based Translation
Among syntax-based translation models, the tree-based approach, which takes as input a parse tree of the source sentence, is a promising direction being faster and simpler than its string-based counterpart. However, current tree-based systems suffer from a major drawback: they only use the 1-best parse to direct the translation, which potentially introduces… (More)
A Cascaded Linear Model for Joint Chinese Word Segmentation and Part-of-Speech Tagging
We propose a cascaded linear model for joint Chinese word segmentation and part-of-speech tagging. With a character-based perceptron as the core, combined with real-valued features such as language models, the cascaded model is able to efficiently utilize knowledge sources that are inconvenient to incorporate into the perceptron directly. Experiments show… (More)
Automatic Adaptation of Annotation Standards: Chinese Word Segmentation and POS Tagging - A Case Study
Manually annotated corpora are valuable but scarce resources, yet for many annotation tasks such as treebanking and sequence labeling there exist multiple corpora with different and incompatible annotation guidelines or standards. This seems to be a great waste of human efforts, and it would be nice to automatically adapt one annotation standard to another.… (More)
Word Lattice Reranking for Chinese Word Segmentation and Part-of-Speech Tagging
In this paper, we describe a new rerank-ing strategy named word lattice reranking, for the task of joint Chinese word segmen-tation and part-of-speech (POS) tagging. As a derivation of the forest reranking for parsing (Huang, 2008), this strategy reranks on the pruned word lattice, which potentially contains much more candidates while using less storage,… (More)
The structural basis for activation of plant immunity by bacterial effector protein AvrPto.
Pathogenic microbes use effectors to enhance susceptibility in host plants. However, plants have evolved a sophisticated immune system to detect these effectors using cognate disease resistance proteins, a recognition that is highly specific, often elicits rapid and localized cell death, known as a hypersensitive response, and thus potentially limits… (More)
Improving Tree-to-Tree Translation with Packed Forests
Current tree-to-tree models suffer from parsing errors as they usually use only 1-best parses for rule extraction and decoding. We instead propose a forest-based tree-to-tree model that uses packed forests. The model is based on a probabilis-tic synchronous tree substitution grammar (STSG), which can be learned from aligned forest pairs automatically. The… (More)