کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
436108 689972 2007 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Counting distinct items over update streams
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نظریه محاسباتی و ریاضیات
پیش نمایش صفحه اول مقاله
Counting distinct items over update streams
چکیده انگلیسی

In data streaming applications, data arrives at rapid rates and in high volume, thus making it essential to process each stream update very efficiently in terms of both time and space. A data stream is a sequence of data records that must be processed continuously in an online fashion using sub-linear space and sub-linear processing time. We consider the problem of tracking the number of distinct items over data streams that allow insertion and deletion operations. We present two algorithms that improve on the space and time complexity of existing algorithms.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Theoretical Computer Science - Volume 378, Issue 3, 9 June 2007, Pages 211-222