Báo cáo khoa học: " Named Entity Recognition using an HMM-based Chunk Tagger" pptx

... Markov Model (HMM) and an HMM-based chunk tagger, from which a named entity (NE) recognition (NER) system is built to recognize and classify names, times and numerical quantities. Through ... Named Entity Recognition using an HMM-based Chunk Tagger GuoDong Zhou Jian Su Laboratories for Information Technology 21 Heng Mui Keng Terrace Singapore 119613 zhoug...

Ngày tải lên: 17/03/2014, 08:20

... To achieve this, we take advantage of the facts that Spanish and Catalan are two Romance languages with similar syntactic structure, and that —since Spanish and Catalan social and cultural environ- ments ... consists in first learning a NER model for Spanish using Spanish annotated data, and then translating its lexical features from Spanish into Catalan using the translation dictionary....

Ngày tải lên: 17/03/2014, 22:20

... networks (Schaaf and Kemp, 1997), using linear discriminant analysis (Kamppari and Hazen, 2000), and using SVMs (Zhang and Rud- nicky, 2001). Word posterior probability is a commonly used and effective ... information extraction (IE), question an- swering, and indexing. Named entity recognition (NER) is a key tech- nique for IE and other natural language process- ing tasks. Named...

Ngày tải lên: 17/03/2014, 04:20

... state resonances and the appearance of new resonances upon complex formation indicated a slow exchange on the NMR timescale between the free and the bound forms for NarJT. These results and the ... heterogeneous ligand interaction Table 1. NMR and refinement statistics for NarG(1–15) and NarG(1–28) structures. NarG(1–15) NarG(1–28) NMR distance and dihedral constraints Total NOEs 243 536 Short...

Ngày tải lên: 16/02/2014, 14:20

... 1, 3 and 5 and RNP 2 position 2 (see the following section and Fig. 1). The RNP 1 and RNP 2 motifs are located in the central strands of the b-sheet, namely b 3 and b 1 , respectively, and are ... 1 and 2) can have different lengths and are often disordered in the free form. An exception to this is loop 5 that often forms a small two-stranded b-sheet (b 3 ¢ and b 3 ¢) (Fig. 2). The N- and ....

Ngày tải lên: 19/02/2014, 17:20

... errors, and the CRF models are trained using the alignment results as supervised data. 2.2 Insertion / Deletion Since an insertion can be regarded as replacing an empty word with an actual word, and ... statistical ma- chine translation (PBSMT), but there are three dif- ferences; 1) it adopts the conditional random fields, 2) it allows insertion and deletion, and 3) binary and real fea...

Ngày tải lên: 19/02/2014, 19:20

... Polarity Using Random Walks Ahmed Hassan University of Michigan Ann Arbor Ann Arbor, Michigan, USA hassanam@umich.edu Dragomir Radev University of Michigan Ann Arbor Ann Arbor, Michigan, USA radev@umich.edu Abstract Automatically ... product is very impor- tant for marketing and customer relation manage- ment (Morinaga et al., 2002). Manually handling reviews to identify reputation is a ver...

Ngày tải lên: 20/02/2014, 04:20

... extractive and abstrac- tive. In the work of (Douzidia and Lapalme, 2004), and extractive method was used to produce a 10- words summary (which can be considered as a headline) of an Arabic ... headlines is an important phase. Automatic me- thods for evaluating machine generated headlines are preferred against human evaluations because they are faster, cost effective and can be perfo...

Ngày tải lên: 20/02/2014, 05:20

... containing information about collaborations and latitudes and longitudes of cities and countries into an SVG rep- resentation 2 . This can be viewed through an Adobe Browser Plugin 3 . In the map, ... summary limit means that at most four clusters should be formed. This means coarser clustering (fewer and larger clusters) for locations with many collaborations and finer-grained (more and s...

Ngày tải lên: 20/02/2014, 09:20

... obtained by using a Japanese depen- dency analyzer such as KNP (Kurohashi and Na- gao, 1994) or CaboCha (Kudo and Matsumoto, 2002). Although this information is less accu- rate than manually annotated ... alone on the beach.) Figure 1: Example of a Japanese sentence, bunsetsu and dependencies 2 Parsing Japanese The Japanese language is basically an SOV lan- guage, but word order is relati...

Ngày tải lên: 20/02/2014, 12:20