Báo cáo khoa học: "UNSUPERVISED WORD SENSE DISAMBIGUATION RIVALING SUPERVISED METHODS" ppt

... UNSUPERVISED WORD SENSE DISAMBIGUATION RIVALING SUPERVISED METHODS David Yarowsky Department of Computer and Information ... collocations for tar- get senses of a word, given a few seed collocations 1Note that the problem here is sense disambiguation: assigning each instance of a word to established sense definitions ... One sense per collocation: 2 Nearby words p...

Ngày tải lên: 31/03/2014, 06:20

... describes SENSELEARNER – a minimally supervised word sense disam- biguation system that attempts to disam- biguate all content words in a text using WordNet senses. We evaluate the accu- racy of SENSELEARNER ... model learning Sense tagged text semantic models SenseLearner definitions Word sense disambiguation Trained semantic models Sense tagged texts Figure 1: Semantic model l...

Ngày tải lên: 20/02/2014, 15:20

... address sense matching in lexical substitution is applying Word Sense Disambiguation (WSD) to identify the senses of the source and target words. Then, substitution is applied only if the words ... all WordNet synonyms of the target word, under all its possible senses, and picking randomly one of the synonyms as the source word. For example, the word ‘disc’ is one of the words in...

Ngày tải lên: 20/02/2014, 12:20

... to WordNet During the first phase of our methodology we aim to establish links between Wikipages and Word- Net senses. Formally, given the entire set of pages Senses Wiki and WordNet senses Senses WN , ... we define its disambiguation context Ctx(w) as the set of words obtained from some or all of the three sources above. 3.2.2 Disambiguation Context of a WordNet Sense Given a WordNet...

Ngày tải lên: 17/03/2014, 00:20

... Introduction Sense induction is the task of discovering automat- ically all possible senses of an ambiguous word. It is related to, but distinct from, word sense disam- biguation (WSD) where the senses ... the generated word. Then, the word sense is selected based on the word, neighbor, and topic. Boyd-Graber et al. (2007) extend the topic mod- eling framework to include WordNet...

Ngày tải lên: 22/02/2014, 02:20

... which can be used for unsupervised word sense disambiguation and estimating distributional similarity of word senses, as well. 1 Introduction The occurrences of the senses of a word usually have skewed ... two words on either side of the target word, but rather windows of 5 words in our experiments. 3 SENSEVAL-1 head words have a wide range of possible senses, and availability of a...

Ngày tải lên: 08/03/2014, 21:20

... Models 1 and 2 (where target words were generated one by one from source words independently of each other) had to be abandoned in favor of one in which each source word had to first decide how ... by restricting the set of words that each source word can translate into. Thus, the model will not discriminate 4 States contain a bit more information than the index of the previous source wor...

Ngày tải lên: 17/03/2014, 00:20

... mapped to a tar- get semantic frame if many word senses in the two frames translate to each other; 2. A source word sense translates into a target word sense if their parent frames map to each ... Example word sense translation out- put The word sense translation accuracies of the above words are shown in Table 2. The results are highly positive given that those from...

Ngày tải lên: 17/03/2014, 04:20

... which is a shortened form of a word or a sequence of words, which is called the sense of the abbreviation. Abbreviation disambiguation means to choose the correct sense for a specific context. ... sense is the most commonly appended sense by the specific prefix. 2. Before/After K (1,2,3,4) Words Counted Rule (BKWC/AKWC): The selected sense is the most commonly preceded/s...

Ngày tải lên: 31/03/2014, 00:20

... model many-to-one word alignments, where each source word is aligned with zero or one target words, and therefore each target word can be aligned with many source words. Each source word is labelled ... instance, as well as detecting that a source word is aligned to a given target word, we would also like to encode syntactic and lexi- cal features of the word pair, such as their...

Ngày tải lên: 20/02/2014, 11:21