ماشین یادگیری مفرط عمیق: رویکرد ترکیبی یادگیری افزایشی برای طبقه‌بندی داده‌های جریانی
الموضوعات :
1 - دانشگاه سجاد مشهد،دانشکده مهندسی کامپیوتر و فناوری اطلاعات
2 - دانشگاه سمنان،دانشکده مهندسی برق و کامپیوتر
الکلمات المفتاحية: داده‌های جریانی, رانش مفهوم, ماشین یادگیری مفرط, یادگیری افزایشی,
ملخص المقالة :
داده‌های جریانی متشکل از داده‌هایی است که به ترتیب و با سرعت و حجم زیاد به سیستم وارد می‌شوند. توزیع این داده‌ها ناپایدار بوده و در طول زمان ممکن است تغییر کنند. با توجه به اهمیت این نوع داده‌ها در حوزه‌هایی مهم نظیر اینترنت اشیا، تسریع عملکرد و افزایش توان عملیاتی تحلیل داده‌های بزرگ جریانی به عنوان موضوعی مهم، مورد توجه محققین است. در روش پیشنهادی، از مفهوم یادگیری ترکیبی برخط در مدل بهبودیافته ماشین یادگیر مفرط به منظور طبقه‌بندی داده‌های جریانی استفاده شده است. به دلیل استفاده از رویکرد افزایشی، در هر لحظه تنها یک بلوک داده بدون نیاز به دسترسی به داده‌های پیشین یاد گرفته می‌شود. همچنین با بهره‌گیری از رویکرد آدابوست، وزن‌دهی به طبقه‌بندی‌کننده‌های پایه و تصمیم‌گیری در مورد حفظ و یا حذف آنها بر اساس کیفیت پیش‌بینی‌ها انجام می‌شود. مزیت دیگر روش پیشنهادی، بهره‌گیری از رویکرد مبتنی بر صحت طبقه‌بندی کننده جهت شناسایی رانش مفهوم است که منجر به تسهیل انطباق مدل و افزایش کارایی آن می‌شود. آزمایش‌ها بر روی مجموعه داده‌های استاندارد انجام گردید و روش پیشنهادی به طور میانگین با کسب 90/0% خاص‌بودن، 69/0% حساسیت و 87/0% صحت توانست اختلاف معناداری با دو روش رقیب داشته باشد.
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