Báo cáo khoa học: "Training Conditional Random Fields with Multivariate Evaluation Measures" potx

... 217–224, Sydney, July 2006. c 2006 Association for Computational Linguistics Training Conditional Random Fields with Multivariate Evaluation Measures Jun Suzuki, Erik McDermott and Hideki Isozaki NTT Communication ... isozaki}@cslab.kecl.ntt.co.jp Abstract This paper proposes a framework for train- ing Conditional Random Fields (CRFs) to optimize multivariate evaluation...

Ngày tải lên: 17/03/2014, 04:20

... results (Section 6) and conclude (Section 7). 2 Conditional Random Fields CRFs can be considered as a generalization of lo- gistic regression to label sequences. They define a conditional probability distribution ... Models (McCallum et al., 2000), Projection Based Markov Models (Punyakanok and Roth, 2000), Conditional Random Fields (Lafferty et al., 2001), Sequence AdaBoost (Alt...

Ngày tải lên: 08/03/2014, 04:22

... on Conditional Random Fields (Lafferty et al., 2001) (CRFs) which are able to model the sequential dependencies be- tween contiguous nodes. A CRF is an undirected graphical model G of the conditional ... answers together with the questions will yield not only a coherent forum summary but also a valu- able QA knowledge base. In this paper, we propose a general framework based on Con-...

Ngày tải lên: 23/03/2014, 17:20

... Informatics University of Edinburgh United Kingdom miles@inf.ed.ac.uk Abstract Conditional Random Fields (CRFs) have been applied with considerable success to a number of natural language processing tasks. ... on NER task. trained without regularisation and with a Gaussian prior. An exhaustive code was created with all 127 unique columns. All of the weak learners were trained wit...

Ngày tải lên: 31/03/2014, 03:20

... 451–458, Ann Arbor, June 2005. c 2005 Association for Computational Linguistics Using Conditional Random Fields For Sentence Boundary Detection In Speech Yang Liu ICSI, Berkeley yangl@icsi.berkeley.edu Andreas ... discrimi- native model; however, it attempts to make decisions locally, without using sequential information. A conditional random field (CRF) model (Laf- ferty et al., 20...

Ngày tải lên: 31/03/2014, 03:20

... β (| ˜ f|+|˜e|) with the source and target Table 1: Avg. source phrase lengths in forced alignment without leaving-one-out and with stan- dard and length-based leaving-one-out. avg. phrase length without ... over-fitting, as the number of match- ing training sentences decreases with increasing phrase length. We can see an example in Figure 2. Without leaving-one-out the sentence is seg-...

Ngày tải lên: 07/03/2014, 22:20

... event coreference task. Designed with the pur- pose of clustering complex linguistic ob- jects, these models consider a potentially infinite number of features and categorical outcomes. The evaluation performed ... then associate each event mention with only one cluster from each set. The first set uses the transitive closure of the WordNet SYNONYMOUS relation to form clusters with all...

Ngày tải lên: 07/03/2014, 22:20

... Accuracy with Pseudo-Parallel Unlabeled Figure 4. Accuracy with Pseudo-Parallel Unlabeled Data in Setting 1 Data in Setting 2 Figure 5. Accuracy with Pseudo-Parallel Labeled Figure 6. Accuracy with ... training data. (Examples with conflicting labels within the pair are not included.) 5 Results and Analysis In our experiments, the methods are tested in the two data settings...

Ngày tải lên: 17/03/2014, 00:20

... (NANC). Since there were very few NPs with more than 5 modifiers, we kept those with 2-5 modifiers and with tags NN or NNS for the head noun. We also kept NPs with only 1 modifier to be used for generating ... Color ∗ Modifier in position i is a color, where we use a list of common colors Starts With a Number ∗ Modifier in position i starts with a number Is a Number ∗ Modifier in positi...

Ngày tải lên: 30/03/2014, 21:20

... pages 121–124, Suntec, Singapore, 4 August 2009. c 2009 ACL and AFNLP Reducing SMT Rule Table with Monolingual Key Phrase Zhongjun He † Yao Meng † Yajuan L ‡ Hao Yu † Qun Liu ‡ † Fujitsu R&D ... a technique based on term extraction. Experiments show that 78% of the rule ta- ble is reduced without worsening trans- lation performance. In most cases, our approach results in measurable imp...

Ngày tải lên: 31/03/2014, 00:20