Metrics for Evaluating Database Selection Techniques

9/27/99


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Table of Contents

Metrics for Evaluating Database Selection Techniques

Overview of Talk

Introduction

Motivation for Current Work

Testbeds Used in PreviousWork

Terminology

Testbed SYM

Testbed UDC

SYM Testbed Partition Statistics

SYM Testbed Topic Coverage

Document and Query Coverage

Experiment

Baselines

Example Baseline

Estimators

Example Estimate

Evaluation Measures

Mean squared error

MSE

Recall and Precision Analogs

Example Performance Measures

Recall Analogs

Relationship between and

Comparing CORI and gGlOSS

Random Ranking Algorithm

Expected Value of Recall Measures

Comparative Performance

PPT Slide

Conclusions

Future Work

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Precision vs. Recall Example

Recall & Precision Analogs

Author: Computer Science Department