Tools
Sorted by:
Try your query at:
 |
 |
 |
 |
 |
 |
Results 1 - 10
of
9,179
Improving automatic query expansion
, 1998
"... Abstract Most casual users of IR systems type short queries. Recent research has shown that adding new words to these queries via odhoc feedback improves the re-trieval effectiveness of such queries. We investigate ways to improve this query expansion process by refining the set of documents used in ..."
Abstract
-
Cited by 286 (4 self)
- Add to MetaCart
results show that refining the set of documents used in query expansion often prevents the query drift caused by blind expansion and yields substantial improvements in retrieval effectiveness, both in terms of average preci-sion and precision in the top twenty documents. More importantly, the fully
Concept Based Query Expansion
, 1993
"... Query expansion methods have been studied for a long time - with debatable success in many instances. In this paper we present a probabilistic query expansion model based on a similarity thesaurus which was constructed automatically. A similarity thesaurus reflects domain knowledge about the particu ..."
Abstract
-
Cited by 233 (2 self)
- Add to MetaCart
the particular collection from which it is constructed. We address the two important issues with query expansion: the selection and the weighting of additional search terms. In contrast to earlier methods, our queries are expanded by adding those terms that are most similar to the concept of the query, rather
Phrasal Translation and Query Expansion Techniques for Cross-Language Information Retrieval
- In Proceedings of the 20th International ACM SIGIR Conference on Research and Development in Information Retrieval
, 1997
"... Dictionary methods for cross-language information retrieval give performance below that for mono-lingual retrieval. Failure to translate multi-term phrases has been shown to be one of the factors responsible for the errors associated with dictionary methods. First, we study the importance of phrasal ..."
Abstract
-
Cited by 199 (3 self)
- Add to MetaCart
Dictionary methods for cross-language information retrieval give performance below that for mono-lingual retrieval. Failure to translate multi-term phrases has been shown to be one of the factors responsible for the errors associated with dictionary methods. First, we study the importance
Learning from imbalanced data
- IEEE Trans. on Knowledge and Data Engineering
, 2009
"... Abstract—With the continuous expansion of data availability in many large-scale, complex, and networked systems, such as surveillance, security, Internet, and finance, it becomes critical to advance the fundamental understanding of knowledge discovery and analysis from raw data to support decision-m ..."
Abstract
-
Cited by 260 (6 self)
- Add to MetaCart
Abstract—With the continuous expansion of data availability in many large-scale, complex, and networked systems, such as surveillance, security, Internet, and finance, it becomes critical to advance the fundamental understanding of knowledge discovery and analysis from raw data to support decision
Model-based Feedback in the Language Modeling Approach to Information Retrieval
- In Proceedings of Tenth International Conference on Information and Knowledge Management
, 2001
"... The language modeling approach to retrieval has been shown to perform well empirically. One advantage of this new approach is its statistical foundations. However, feedback, as one important component in a retrieval system, has only been dealt with heuristically in this new retrieval approach: the o ..."
Abstract
-
Cited by 251 (24 self)
- Add to MetaCart
The language modeling approach to retrieval has been shown to perform well empirically. One advantage of this new approach is its statistical foundations. However, feedback, as one important component in a retrieval system, has only been dealt with heuristically in this new retrieval approach
Measuring the Cyclicality of Real Wages: How Important Is Composition Bias?" NBER Working Paper No
"... In the period since the 1960s, as in other periods, aggregate time series on real wages have displayed only modest cyclicality. Macroeconomists therefore have described weak cyclicality of real wages as a salient feature of the business cycle. Contrary to this conventional wisdom, our analysis of lo ..."
Abstract
-
Cited by 201 (3 self)
- Add to MetaCart
-skill workers during expansions than during recessions. I.
Public Policy and Economic Growth: Developing Neoclassical Implications
- JOURNAL OF POLITICAL ECONOMY
, 1990
"... Why do the countries of the world display considerable disparity in long term growth rates? This paper examines the hypothesis that the answer lies in differences in national public policies which affect the incentives that individuals have to accumulate capital in both its physical and human forms. ..."
Abstract
-
Cited by 216 (0 self)
- Add to MetaCart
) or to "growth miracles " (in which countries shift from little growth to rapid expansion) This influence of taxation on the rate of economic growth has important welfare implications: in basic endogenous growth models, the welfare cost of a 10 % increase in the rate of income tax can be 40 times
Boosting with the L_2-Loss: Regression and Classification
, 2001
"... This paper investigates a variant of boosting, L 2 Boost, which is constructed from a functional gradient descent algorithm with the L 2 -loss function. Based on an explicit stagewise re tting expression of L 2 Boost, the case of (symmetric) linear weak learners is studied in detail in both regressi ..."
Abstract
-
Cited by 208 (17 self)
- Add to MetaCart
, an optimal rate of convergence result holds for both regression and two-class classification. And this boosted smoothing spline adapts to higher order, unknown smoothness. Moreover, a simple expansion of the 0-1 loss function is derived to reveal the importance of the decision boundary, bias reduction
Important
, 2013
"... role for ocean warming and increased ice-shelf melt in Antarctic sea-ice expansion ..."
Abstract
- Add to MetaCart
role for ocean warming and increased ice-shelf melt in Antarctic sea-ice expansion
Criterion Functions for Document Clustering: Experiments and Analysis
, 2002
"... In recent years, we have witnessed a tremendous growth in the volume of text documents available on the Internet, digital libraries, news sources, and company-wide intranets. This has led to an increased interest in developing methods that can help users to effectively navigate, summarize, and org ..."
Abstract
-
Cited by 202 (13 self)
- Add to MetaCart
of information into a small number of meaningful clusters as well as to greatly improve the retrieval performance either via cluster-driven dimensionality reduction, term-weighting, or query expansion. This ever-increasing importance of document clustering and the expanded range of its applications led
Results 1 - 10
of
9,179
