• Publications
  • Influence
A Permanent and Transitory Component Model of Stock Return Volatility
In this paper, we develop a statistical unobserved component model for stock market volatility. The volatility, which is measured by the conditional variance of stock returns, is decomposed into aExpand
  • 567
  • 59
Triangular-Chain Conditional Random Fields
  • Minwoo Jeong, G. Lee
  • Computer Science
  • IEEE Transactions on Audio, Speech, and Language…
  • 1 September 2008
TLDR
This paper presents triangular-chain conditional random fields (CRFs), a unified probabilistic model combining two related problems. Expand
  • 66
  • 13
Information gain and divergence-based feature selection for machine learning-based text categorization
TLDR
We propose a new information gain and divergence-based feature selection method for statistical machine learning-based text categorization without relying on more complex dependence models. Expand
  • 260
  • 8
  • PDF
Recent Approaches to Dialog Management for Spoken Dialog Systems
TLDR
A field of spoken dialog systems is a rapidly growing research area because the performance improvement of speech technologies motivates the possibility of building systems that a human can easily operate in order to access useful information via spoken languages. Expand
  • 76
  • 7
  • PDF
Text Categorization Based on Boosting Association Rules
TLDR
We propose a new approach in which a large number of association rules are generated. Expand
  • 27
  • 7
  • PDF
SiteQ: Engineering High Performance QA System Using Lexico-Semantic Pattern Matching and Shallow NLP
TLDR
We focused on the effectiveness of both noun phrase extraction and our new PRF (Pseudo Relevance Feedback). Expand
  • 102
  • 6
  • PDF
Semi-supervised Speech Act Recognition in Emails and Forums
TLDR
In this paper, we present a semi-supervised method for automatic speech act recognition in email and forums. Expand
  • 77
  • 6
  • PDF