SP500207 Query Improvement in INformation Retrieval Using Genetic Algorithms - A Report on the Experiments of the TREC Project chapter J. Yang R. Korfhage E. Rasmussen National Institute of Standards and Technology Donna K. Harman Table 19. Precision and recall for ad hoc queries Top ranked evaluation Run number: upitt3 all Num[OCRerr]queries: 50 Total number of documents over all queries Retrieved: 5383 Relevant: 5923 Rel_ret: 1249 Recall - Precision Averages: at 0.00 0.5622 atOlO 0.2723 at 0.20 0.2025 at0.30 0.1382 at 0.40 0.0708 at 0.50 0.0309 at0.60 0.0279 at0.70 0.0155 at0.80 0.0136 at0.90 0.0000 at 1.00 0.0000 Average precision for all points 11-ptAvg: 0.1213 Average precision for 3 intermediate points (0.20,0.50,0.80) 3-ptAvg: 0.0824 Table 20. Precision and recall for routing queries Top ranked evaluation Run number: upitt3 all Num[OCRerr]queries: 50 Total number of documents over all queries Retrieved: 7611 Relevant: 14216 Rel_ret: 1277 Recall - Precision Averages: at 0.00 0.5285 atOlO 0.2057 at0.20 0.0649 at 0.30 0.0085 at 0.40 0.0000 atOSO 0.0000 at0.60 0.0000 at0.70 0.0000 at0.80 0.0000 at0.90 0.0000 at 1.00 0.0000 Average precision for all points 11-pt Avg: 0.0734 Average precision for 3 intermediate points (0.20, 0.50,0.80) 3-pt Avg: 0.0216 Recall: Recall: at S docs: 0.0192 at 5 docs: 0.0090 at 15 docs: 0.0509 at 15 docs: 0.0215 at 30 docs: 0.0849 at 30 docs: 0.0362 at lOodocs: 0.1753 at 100 docs: 0.0842 at 200 docs: 0.2206 at 200 docs: 0.1007 Precision: Precision: At Sdocs: 0.3280 At Sdocs: 0.3520 At 15 docs: 0.2867 At 15 docs: 0.3013 At 30 docs: 0.2533 At 30 docs: 0.2727 At 100 docs: 0.1844 At 100 docs: 0.2102 At 200 docs: 0.1249 At 200 docs: 0.1277 53