文档介绍：,,whichisoneofthemostpopulartoolstoretrieveinformation,,(ISK),workapplications,,,,,∞nvertunsolvedclassificationtowell-,∞,,by∞binationsofvariousfeatureselectionandclassificationmethods,,:searchkeywords,pseudorelevancefeedback,featureselection,textclassification浙江大学倾七学位论文目录目录摘要.................................……..........…....................….................………"….........…….1Abstract.......••••••••••••••••••••••.••••••••••••••••••••••••••••.•••.•.•••• .•.••••.......…...川….川..........川..川…..叫川.."……..川..川….……川…H…川….……川….川….…………"……....……....……....……....….....……....…….川...……....…..川……....…….....….….…..…·……………………......…......