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Discovering and Using Implicit Data for Information Retrieval
Contextual Translation Implicit Data Information Retrieval Language Model Missing information Relevance Model
2014/12/18
In real-world information retrieval (IR) tasks, the searched items and/or the users' queries often have implicit information associated with them -- information that describes unspecified aspects of t...
Query-Dependent Selection of Retrieval Alternatives
Information Retrieval Learning to Rank Machine Learning
2014/12/18
The main goal of this thesis is to investigate query-dependent selection of retrieval alternatives for Information Retrieval (IR) systems. Retrieval alternatives include choices in representing querie...
Retrieval and Evaluation Techniquesfor Personal Information
Information Retrieval Personal Information Management
2014/12/18
Providing an effective mechanism for personal information retrieval is important for many applications, and requires different techniques than have been developed for general web search. This thesis f...
Current information retrieval models are optimized for retrieval with short keyword queries. In contrast, in this dissertation we focus on longer, verbose queries with more complex structure that are ...
Exploring Privacy and Personalization in Information Retrieval Applications
information retrieval personalization privacy web search
2014/12/18
A growing number of information retrieval applications rely on search behavior aggregated over many users. If aggregated data such as search query reformulations is not handled properly, it can allow ...
Query-Time Optimization Techniques for Structured Queries in Information Retrieval
algorithms information retrieval optimization search
2014/12/18
The use of information retrieval (IR) systems is evolving towards larger, more complicated queries. Both the IR industrial and research communities have generated significant evidence indicating that ...
Retrieval Models based on Linguistic Features of Verbose Queries
Information Retrieval Retrieval Model Modeling Term Dependencies Focused Retrieval Query Term Expansion Translation Model
2014/12/18
Natural language expressions are more familiar to users than choosing keywords for queries. Given that, people can use natural language expressions to represent their sophisticated information needs. ...
Indexing Proximity-based Dependencies for Information Retrieval
Efficiency Evaluation Information Retrieval Systems
2014/12/18
Research into term dependencies for information retrieval has demonstrated that dependency retrieval models are able to consistently improve retrieval effectiveness over bag-of-words models. However, ...
Entity-based Enrichment for Information Extraction and Retrieval
Information Retrieval Information Extraction Search Search Engines Knowledge Base
2014/12/18
The goal of this work is to leverage cross-document entity relationships for improved understanding of queries and documents. We define an entity to be a thing or concept that exists in the world, suc...
A Kernel-based Case Retrieval Algorithm with Application to Bioinformatics
Kernel-based Case Retrieval Algorithm Bioinformatics
2010/12/14
Case retrieval in case-based reasoning relies heavily on the design of a good similarity function. This paper provides an approach to utilizing the correlative information among features to compute th...