本文關(guān)鍵詞：基于EEMD的水資源監(jiān)測(cè)數(shù)據(jù)異常值檢測(cè)與校正　出處：《農(nóng)業(yè)機(jī)械學(xué)報(bào)》2017年09期 　論文類型：期刊論文

  更多相關(guān)文章： 水資源 監(jiān)測(cè)數(shù)據(jù) 異常值 集成經(jīng)驗(yàn)?zāi)B(tài)分解 中位數(shù) 分段曲線擬合

【摘要】：提出利用中位數(shù)法與集成經(jīng)驗(yàn)?zāi)B(tài)分解(EEMD)相結(jié)合的方法對(duì)時(shí)間序列數(shù)據(jù)的異常值進(jìn)行檢測(cè),首先通過中位數(shù)法對(duì)明顯異常的數(shù)據(jù)進(jìn)行初步篩選,再用EEMD對(duì)剩余數(shù)據(jù)進(jìn)行分解,通過疊加低頻分量可以擬合出大多數(shù)數(shù)據(jù)的整體變化趨勢(shì),而不受異常值的影響,從而根據(jù)偏差比率可有效檢測(cè)出異常值。然后根據(jù)異常值檢測(cè)后的時(shí)間序列數(shù)據(jù)的凹凸性變化趨勢(shì),用分段曲線擬合對(duì)異常值校正。最后,以H1自來水廠的日取水量數(shù)據(jù)為例進(jìn)行實(shí)證分析。結(jié)果表明:提出的中位數(shù)法與EEMD相結(jié)合的方法能夠有效地檢測(cè)異常值,校正后得到的數(shù)據(jù)能夠真實(shí)反映該水廠取用水情況,可為后續(xù)分析提供更加真實(shí)可靠的數(shù)據(jù)。
[Abstract]:The decomposition using median method and ensemble empirical mode (EEMD) combined with the method of time series data outlier detection, first through the median method used for preliminary screening of abnormal data, then EEMD of the remaining data is decomposed by superimposing the low frequency components can be fitted with the overall change trend of most of the data, but not influence the abnormal value, according to the deviation ratio can effectively detect outliers. Then according to the abnormal value of convex trend time series data after detection, correction of abnormal value by piecewise curve fitting. Finally, in order to tap water plant water on H1 data for empirical analysis. The results show that the method median method EEMD with the combination of proposed can effectively detect outliers, the corrected data can reflect the water intake of water, can be provided for the subsequent analysis More truthful and reliable data.

【作者單位】： 中國(guó)航天系統(tǒng)科學(xué)與工程研究院研究生部;中國(guó)水利水電科學(xué)研究院水資源研究所;湖南農(nóng)業(yè)大學(xué)理學(xué)院;水利部水資源管理中心;
【基金】：國(guó)家自然科學(xué)基金委員會(huì)-廣東聯(lián)合基金項(xiàng)目(U1501253) 廣東省省級(jí)科技計(jì)劃項(xiàng)目(2016B010127005)
【分類號(hào)】：TV213.4
【正文快照】： 引言水資源是人類社會(huì)賴以生存和發(fā)展的基本條件,是一個(gè)國(guó)家經(jīng)濟(jì)社會(huì)發(fā)展的重要戰(zhàn)略資源。2011年中央1號(hào)文件和中央水利工作會(huì)議明確要求實(shí)行最嚴(yán)格水資源管理制度。為支撐最嚴(yán)格水資源管理制度更好地實(shí)施,2012年國(guó)家啟動(dòng)了水資源監(jiān)控能力建設(shè)項(xiàng)目[1-2]。在此之前,國(guó)家也已開，

本文編號(hào)：1377775