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        <datestamp>2025-01-19T09:58:16Z</datestamp>
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          <dc:title>動的モード分解による時系列データストリームの将来予測</dc:title>
          <dc:title xml:lang="en">Real-time Forecasting of Time-evolving Data Streams using Dynamic Mode Decomposition</dc:title>
          <jpcoar:creator>
            <jpcoar:creatorName>千原, 直己</jpcoar:creatorName>
          </jpcoar:creator>
          <jpcoar:creator>
            <jpcoar:creatorName>松原, 靖子</jpcoar:creatorName>
          </jpcoar:creator>
          <jpcoar:creator>
            <jpcoar:creatorName>藤原, 廉</jpcoar:creatorName>
          </jpcoar:creator>
          <jpcoar:creator>
            <jpcoar:creatorName>櫻井, 保志</jpcoar:creatorName>
          </jpcoar:creator>
          <jpcoar:creator>
            <jpcoar:creatorName xml:lang="en">Naoki, Chihara</jpcoar:creatorName>
          </jpcoar:creator>
          <jpcoar:creator>
            <jpcoar:creatorName xml:lang="en">Yasuko, Matsubara</jpcoar:creatorName>
          </jpcoar:creator>
          <jpcoar:creator>
            <jpcoar:creatorName xml:lang="en">Ren, Fujiwara</jpcoar:creatorName>
          </jpcoar:creator>
          <jpcoar:creator>
            <jpcoar:creatorName xml:lang="en">Yasushi, Sakurai</jpcoar:creatorName>
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          <jpcoar:subject subjectScheme="Other">[研究論文] 時系列予測，データストリーム処理，動的モード分解</jpcoar:subject>
          <datacite:description descriptionType="Other">本論文では，動的モード分解を活用した大規模時系列データストリームの高速予測手法ModeCastを提案する．ModeCastはセンサデータや，Webデータなど，多種多様な時系列パターンにより構成される大規模時系列データストリームが与えられたとき，その中から潜在的なダイナミクスに基づいた重要な時系列パターンを発見することで将来予測を行う．より具体的には，このようなパターンを発見するために動的モード分解（DMD）を活用する．提案手法は，(a)大規模データストリームの中から重要なダイナミクスを発見し，リアルタイムかつ長期的な予測を可能とする．また，(b)様々なデータに対して予測を行うことが可能であり，実用的である．さらに，提案手法は(c)データストリームの長さに依存せず，非常に高速である．実データを活用した実験により，提案手法が時系列データストリームの将来予測のための既存手法と比較して高精度であること，計算時間についてデータサイズに依存せず，より高速なリアルタイム予測を達成していることを明らかにした．</datacite:description>
          <datacite:description descriptionType="Other">Given a large, online stream of multiple co-evolving data sequences (e.g., sensor/web activities streams), which contains multiple distinct time-series patterns based on inherent dynamics, how do we capture important patterns and forecast future values? In this paper, we present ModeCast, an efficient and effective method for forecasting co-evolving data sequences. ModeCastexploits Dynamic Mode Decomposition (DMD) to capture time-series patterns based on inherent dynamics. Our proposed method has the following properties: (a) Effective: it captures important time-evolving patterns in data streams and enables real-time, long-range forecasting; (b) General: our model can be practically applied to various types of time-evolving data streams; (c) Scalable: our algorithm does not depend on the length of data streams and thus is applicable to very large sequences. Extensive experiments on a real dataset demonstrate that ModeCastmakes long-range forecasts and consistently outperforms the best existing methods as regards accuracy, and the computational speed is sufficiently fast.</datacite:description>
          <dc:publisher xml:lang="ja">情報処理学会</dc:publisher>
          <datacite:date dateType="Issued">2024-04-23</datacite:date>
          <dc:language>jpn</dc:language>
          <dc:type rdf:resource="http://purl.org/coar/resource_type/c_6501">journal article</dc:type>
          <jpcoar:identifier identifierType="URI">https://ipsj.ixsq.nii.ac.jp/records/233825</jpcoar:identifier>
          <jpcoar:sourceIdentifier identifierType="ISSN">1882-7799</jpcoar:sourceIdentifier>
          <jpcoar:sourceIdentifier identifierType="NCID">AA11464847</jpcoar:sourceIdentifier>
          <jpcoar:sourceTitle>情報処理学会論文誌データベース（TOD）</jpcoar:sourceTitle>
          <jpcoar:volume>17</jpcoar:volume>
          <jpcoar:issue>2</jpcoar:issue>
          <jpcoar:pageStart>1</jpcoar:pageStart>
          <jpcoar:pageEnd>11</jpcoar:pageEnd>
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            <datacite:date dateType="Available">2026-04-23</datacite:date>
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