辽宁大学学报（自然科学版）2025，Vol.52Issue(2)：186-192,7.
基于可变多级时窗的时间序列流事件获取方法
A Method for Obtaining Time Series Flow Events Based on Variable Multi-Level Time Windows
摘要
Abstract
Obtaining events from time series flow is the basis of time series flow processing.Most of the current research uses the traditional threshold determination method to query data points in the time series flow to obtain the event information.In a real-world scenario,an event is usually defined as an exception that contains multiple pieces of information over a continuous period of time,yet existing methods cannot quickly locate and adequately capture these exceptions.Aiming at the problems of low efficiency and poor accuracy of existing methods,this paper proposes a method for obtaining time series flow events based on variable multi-level time windows.Specifically,the method first uses a median filter to preprocess the original data,which improves the obtaining accuracy to a certain extent.Then an STA(Short term averaging)/LTA(Long term averaging)based event triggering algorithm is proposed to locate the approximate range of the start point and end point of the exception.Finally,the start and end points of the exception are precisely located based on AIC(Akaike information criterion)rules,so as to obtain the complete information of the exception and time series flow events.Experimental results show that the proposed method has significant advantages in execution efficiency and accuracy compared with existing methods.关键词
时间序列流/阈值跳度/AIC法则/STA/LTA/事件获取Key words
time series flow/threshold jump/AIC rule/STA/LTA/event obtain分类
信息技术与安全科学引用本文复制引用
徐雁翎,季帅斌,孙可欣,王俊陆..基于可变多级时窗的时间序列流事件获取方法[J].辽宁大学学报（自然科学版）,2025,52(2):186-192,7.基金项目
辽宁大学青年科研基金项目(揭榜挂帅服务地方项目)(LDYBJB2301) （揭榜挂帅服务地方项目）
教育部产学合作协同育人项目(230701160260308) （230701160260308）
辽宁省教育厅高校基本科研项目(理工类)面上项目(揭榜挂帅服务地方项目)(JYTMS20230761) （理工类）
辽宁省应用基础研究计划(2022JH2/101300250) （2022JH2/101300250）
