dissertationideas.co.uk

 

 

Learning Relevance Order Over Graphically Linked Objects

 

Introduction

In this dissertation, we look into the problem of learning a relevance order over a set of objects linked together by a graph, an example being, the hyperlink graph on the web. Previous approaches to the problem of learning relevance order have largely disregarded the fact that the objects are connected by a graph. The objects were represented as independent samples from some vector-space and the the ordering problem was posed as a classification/regression problem over these samples. We observe that objects are not really independent samples, i.e., the rank score of an object is not determined only by itself but by rank scores of other linked objects.

It is proposed an approach to enhance PageRank like link-based ranking algorithms, that takes as input, data capturing user's notion of relevance order over the nodes of an underlying graph and automatically assigns edge weights to the links of the graph, so that the concerned ranking algorithm (PageRank here), using this weighted graph, now orders the graph objects in accordance with user's relevance notion. Earlier approaches in learning relevance via edge weight tuning are largely sub-optimal and inefficient.

We use the principle of Maximum Entropy to search for an optimal assignment of edge weights. We provide preliminary experimental results on synthetic data to demonstrate the effectiveness of our approach. We end with a discussion on how our approach can be further adapted to learning type-specific edge weights for relevance ranking over graphs containing nodes and edges of heterogeneous types.

 

 

 

 

 

<< back

Labels : Free Dissertation Information Technology, Business Information Technology Dissertation Ideas, Dissertation Topics Business Information Technology, Business Information Technology Dissertation, Information Technology Dissertation Examples, Information Technology Dissertation Topics, Information Technology Dissertation Ideas, MBA Dissertation Topics in Information Technology, Dissertation Ideas in Information Technology, Dissertation Topics on Information Technology Management, Dissertation Topics on Information Systems Security, Dissertation Topics on Information Management, Dissertation Topics on Information Technology, Dissertation on Information Technology Management, Dissertation on Information Security, Dissertation on Information Systems, Dissertation on Information Technology, Information Technology or IT Dissertation Ideas Topics

 
Copyright © Dissertationideas.co.uk 2012 through 2014