Báo cáo khoa học: "Hybrid Parsing: Using Probabilistic Models as Predictors for a Symbolic Parser" docx

... the eas- ier attachment task and therefore provided the gold standard POS tag as part of the input data, whereas in our case pure word form sequences are anal- ysed and POS disambiguation is part ... necessary annotation effort are available in vastly different amounts: While train- ing a probabilistic parser or a supertagger usually 321 requires a fully developed tree bank, in the...

Ngày tải lên: 31/03/2014, 01:20

... Syntax-based statistical machine transla- tion (MT) aims at applying statistical models to structured data. In this paper, we present a syntax-based statistical ma- chine translation system based ... introduce our approach to inducing such a grammar from parallel corpora. Second, we de- scribe the graphical model for the ma- chine translation task, which can also be viewed as...

Ngày tải lên: 20/02/2014, 15:20

... Our approach involves building a probabilistic context-free grammar for each author and using this grammar as a language model for classification. We evaluate the perfor- mance of our method on a wide ... Our approach involves building a probabilistic context- free grammar (PCFG) for each author and using this grammar as a language model for classifica- tion. Exper...

Ngày tải lên: 23/03/2014, 16:20

... category, as in the case of VP/S-NOM in the example. 2.1 Task representation and evaluation method To formulate the task as a machine-learnable classi- fication task, we use a representation that encodes the ... function tag- ging task is easier thanfindinggrammaticalrelations as we tag a headword of a chunk as e.g. a subject in isolation whereas grammatical relation assign- m...

Ngày tải lên: 08/03/2014, 07:20

... (Interspeech), Makuhari, Japan John Makhoul, Francis Kubala, Richard Schwartz, and Ralph Weischedel. 1999. Performance mea- sures for information extraction. In Proceedings of DARPA Broadcast News Workshop, ... NER tasks: i) named entities annotated used in this work have a tree structure, thus the task cannot be tackled as a sequence la- belling task; ii) the data used are more noisy...

Ngày tải lên: 24/03/2014, 03:20

... originally designed as a Web-based open-domain question answering (QA) system. It successfully uses natural language processing and information retrieval techniques and reaches very high correct answer rate. ... believe that it has been the largest size of knowledge base for QA tasks at current time. And the designed size can be much bigger than the size we have already reached. This ma...

Ngày tải lên: 31/03/2014, 20:20

... which are annotated as opinionated only by two annotators. In case A and case D, the polarities annotated by annotators are identical. In case B, the polarities annotated by two of three annotators ... by Kappa values. Kappa value gives a quantitative measure of the magnitude of inter- annotator agreement. Table 3 shows a commonly used scale of the Kappa values. Kappa value M...

Ngày tải lên: 08/03/2014, 02:21

... lemmas and it can analyze about 20,000,000 word forms. 2 The Training Data Our training data consists of about 130,000 tokens of newspaper and magazine text, manually double- tagged and ... It means that e.g. the ambiguity class 23 for category CASE (mean- ing that there is an ambiguity between genitive and dative cases) is different from ambiguity class 23 for category GRADE ......

Ngày tải lên: 17/03/2014, 07:20

... of flax leaves. Galactolipids were separated and purified as described in Materials and methods. EDE content was measured by UV absorbance of MGDG and DGDG fractions at 267 nm. Average values and ... Oxo-phytodienoic acid-containing galactolipids in Arabidopsis: jasmonate signaling dependence. Plant Physiol 145, 1658–1669. 47 Buseman CM, Tamura P, Sparks AA, Baughman EJ, Maatta S, Zhao J, Rot...

Ngày tải lên: 23/03/2014, 05:22

... the large fragment (17 ⁄ 19 kDa) of acti- vated caspase-3 resulting from cleavage adjacent to Asp175. The antibody does not recognize full-length caspase-3 or other cleaved caspases. Signals were ... detected using a Lumi- Imager (Roche Diagnostics). image quant (Molecular Dynamics, Amersham Biosciences, NJ, USA) was used for quantitation, using b-actin for normalization. Statistics...

Ngày tải lên: 23/03/2014, 09:21