Báo cáo khoa học: "Training Conditional Random Fields with Multivariate Evaluation Measures" potx
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...
Báo cáo khoa học: "Using Conditional Random Fields to Predict Pitch Accents in Conversational Speech" pptx
... 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...
Báo cáo khoa học: "Using Conditional Random Fields to Extract Contexts and Answers of Questions from Online Forums" docx
... 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-...
Báo cáo khoa học: "Scaling Conditional Random Fields Using Error-Correcting Codes" docx
... 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...
Báo cáo khoa học: "Using Conditional Random Fields For Sentence Boundary Detection In Speech" potx
... 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...
Báo cáo khoa học: "Training Phrase Translation Models with Leaving-One-Out" ppt
... 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-...
Báo cáo khoa học: "Unsupervised Event Coreference Resolution with Rich Linguistic Features" potx
... 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...
Báo cáo khoa học: "Joint Bilingual Sentiment Classification with Unlabeled Parallel Corpora" potx
... 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...
Báo cáo khoa học: "Ordering Prenominal Modifiers with a Reranking Approach" potx
... (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...
Báo cáo khoa học: "Reducing SMT Rule Table with Monolingual Key Phrase" potx
... 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...