Yuliya Vladimirovna RubtsovaRussia, NovosibirskResearch areamachine learningtext classificationsentiment analysisAffiliation & position A.P. Ershov Institute of Informatics Systems — programmer E-mailyu.rubtsova@gmail.com List of Articles in System Informatics: Y. Rubtsova Overcoming degradation in sentiment classification for the collections separated in time // System Informatics. — 2016. — # 7. — P. 45-68