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Использование Гамма распределения при решении задачи классификации
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Использование Гамма распределения при решении задачи классификации
1.
Использование Гамма распределения
при решении задачи классификации. Свердлов Евгений
2.
Задача: Классификация
элементов области ( 2-class). Пример: Написан ли текст подписавшимся ? Элемент – (Текст1, Текст2). Автор1 = Автор2 ? (Есть база авторских текстов).
3.
Есть несколько характеристик
текста. Использование одной недостаточно. Как использовать все?
4.
“ Naive Bayes
Classifer ” ? ф-ии плотности для каждой гипотезы ? Н1 : (Автор 1 = Автор2) Н2 : (Автор 1 ≠ Автор2) Плотности “ Гамма-образны ” :
5.
6.
Выяснение авторства по
текстам: 1. Распределение биграмм букв ( сравнение вероятностей наиболее частотных ) : EER ≤ 0.28 (0.95).
7.
8.
9.
2. Распределение биграмм
категорий слов (частей речи) (сравнение вероятностей наиболее частотных): EER ≤ 0.25 (0.95). Совмещение: EER ≤ 0.23 (0.95).
10.
11.
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