This thesis analyses the existing concept - based retrieval systems , based on this introduction , and puts forward a concept retrieval system based on synonyms recognition . automatic recognition of synonyms plays an important role in concept - based information retrieval . based on the analyses of the synonyms recognition , we use the similarity degree among the words to recognize synonyms , and mining a lot of multiple synonyms 同義詞的自動(dòng)發(fā)現(xiàn)和識(shí)別在基于概念的信息檢索領(lǐng)域有著重要的研究意義和應(yīng)用價(jià)值,本文對(duì)國(guó)內(nèi)和國(guó)外同義詞識(shí)別算法進(jìn)行研究和分析的基礎(chǔ)上,對(duì)基于語(yǔ)義體系的同義詞識(shí)別算法,即基于《同義詞詞林》的同義詞識(shí)別算法和基于《知網(wǎng)》的同義詞識(shí)別算法進(jìn)行了深入的研究,利用詞匯間的語(yǔ)義相似度度量來(lái)進(jìn)行同義詞識(shí)別,挖掘出大量的復(fù)合詞形的同義詞。