关键词: 噪声信道, 维吾尔语, 元音弱化, 词干提取, 央音

Abstract: In Uyghur，an inflectional suffix added to a word always produces vowel neutralization.When stemming an inflected word，the rule based neutralized vowel detecting has a low precision about 40%.For this problem，the noisy channel based Uyghur neutralized vowel identification model is proposed.The language model and likelihood build on the word ending two letters，three letters and last syllable.In the test，the model’s precision reached 82.45%，this model can improve stemming precision over 15%.

Key words: noisy channel, Uyghur, vowel harmony, stemming, neutralized vowel