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 12 The combined effect of crossover and mutation, topic 13 ti t2 t3 t4 t5 ti t2 t3 t4 t5 parent 1 .77 .65 .77 .78 .82 child 1 .65 .77 [OCRerr] parent2 .46 .98 .13 .21 .96 child 2 .98 .13 [OCRerr] Note: underhne means caused by crossover double underline means caused by mutation Documents retrieved by parent 1 Documents retrieved by parent 2 Documents retrieved Documents retrieved by child 1 by child 2 DOEl -05-0747 DOE 1-24-0861 DOE 1-05-0747 none DOE 1-11-0383 DOE 1-26-0555 DOE1-1 1-0383 DOE 1-44-0234 DOE 1-36-0791 DOE 1-44-0234 DOE 1-49-0051 DOE 1-50-0948 DOE 1-49-0051 DOE 1-69-0957 DOEl -79-0679 DOE 1-69-0957 DOE 1-81-0200 DOE2-27-0093 DOE 1-81-0200 DOE2-20-0798 DOE2-69- 1023 DOE2-20-0798 DOE2-27-0 146 DOE2-70-0787 DOE2-27-0 146 DOE2-32- 1039 DOE2-7 1-0280 DOE2-32- 1039 DOE2-37-0525 DOE2-80-0365 DOE2-37-0525 DOE2-48-0 100 DOE2-48-0 100 DOE2-49-0342 DOE2-49-0342 DOE2-7 1-0973 DOE2-7 1-0973 DOEl -24-0861 DOE 1-26-0555 DOE 1-36-0791 DOE 1-50-0948 DOE 1-79-0679 DOE2-27-0093 DOE2-69- 1023 DOE2-70-0787 DOE2-7 1-0280 DOE2-80-0365 47