{"created":"2025-01-19T01:08:22.786871+00:00","updated":"2025-01-19T19:27:48.757703+00:00","metadata":{"_oai":{"id":"oai:ipsj.ixsq.nii.ac.jp:00206308","sets":["1164:2240:10178:10282"]},"path":["10282"],"owner":"44499","recid":"206308","title":["低精度・混合精度演算による高性能・高信頼性疎行列ソルバー"],"pubdate":{"attribute_name":"公開日","attribute_value":"2020-07-23"},"_buckets":{"deposit":"66278c80-8461-435b-a581-fa9fc94aad2c"},"_deposit":{"id":"206308","pid":{"type":"depid","value":"206308","revision_id":0},"owners":[44499],"status":"published","created_by":44499},"item_title":"低精度・混合精度演算による高性能・高信頼性疎行列ソルバー","author_link":["512977","512979","512974","512978","512976","512975"],"item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"低精度・混合精度演算による高性能・高信頼性疎行列ソルバー"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"数値計算","subitem_subject_scheme":"Other"}]},"item_type_id":"4","publish_date":"2020-07-23","item_4_text_3":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"東京大学情報基盤センター/理化学研究所計算科学研究センター"},{"subitem_text_value":"東京女子大学現代教養学部"},{"subitem_text_value":"東京大学情報基盤センター"},{"subitem_text_value":"東京大学情報基盤センター"},{"subitem_text_value":"東京大学情報基盤センター"},{"subitem_text_value":"東京大学情報基盤センター"}]},"item_4_text_4":{"attribute_name":"著者所属(英)","attribute_value_mlt":[{"subitem_text_value":"Information Technology Center, The University of Tokyo / RIKEN, Center for Computational Science (R-CCS)","subitem_text_language":"en"},{"subitem_text_value":"School of Arts and Sciences, Tokyo Woman's Christian University","subitem_text_language":"en"},{"subitem_text_value":"Information Technology Center, The University of Tokyo","subitem_text_language":"en"},{"subitem_text_value":"Information Technology Center, The University of Tokyo","subitem_text_language":"en"},{"subitem_text_value":"Information Technology Center, The University of Tokyo","subitem_text_language":"en"},{"subitem_text_value":"Information Technology Center, The University of Tokyo","subitem_text_language":"en"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_publisher":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"情報処理学会","subitem_publisher_language":"ja"}]},"publish_status":"0","weko_shared_id":-1,"item_file_price":{"attribute_name":"Billing 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研吾"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"荻田, 武史"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"塙, 敏博"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"河合, 直聡"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"伊田, 明弘"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"星野, 哲也"}],"nameIdentifiers":[{}]}]},"item_4_source_id_9":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN10463942","subitem_source_identifier_type":"NCID"}]},"item_4_textarea_12":{"attribute_name":"Notice","attribute_value_mlt":[{"subitem_textarea_value":"SIG Technical Reports are nonrefereed and hence may later appear in any journals, conferences, symposia, etc."}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourceuri":"http://purl.org/coar/resource_type/c_18gh","resourcetype":"technical report"}]},"item_4_source_id_11":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"2188-8841","subitem_source_identifier_type":"ISSN"}]},"item_4_description_7":{"attribute_name":"論文抄録","attribute_value_mlt":[{"subitem_description":"エクサスケールシステムにおける高性能数値アルゴリズム実現には,メモリ・ネットワークの階層の深化に対応した通信最適化(Serial,Parallel)とともに省電力・省エネルギーに向けた検討が必要である.近年,科学技術計算において,低精度演算を積極的に活用することにより,計算時間を短縮し省電力・省エネルギーを図る試みが活発に行われている.数値計算による近似解(数値解)は様々な計算誤差を含み,計算結果の信頼性の観点から,数値解の正しさを数学的に保証する必要があり,低精度・変動精度使用時,悪条件問題には重要であるが,実問題で現れる大規模疎行列・H 行列への応用例はほとんどない.本研究では,有限要素法,有限体積法から導出される大規模疎行列を係数行列とする連立一次方程式の求解に着目し,疎行列格納手法,問題規模と低精度演算による性能改善の関係に注目し,様々な計算機環境下での検討を実施した.また著者等によって提案された,M 行列性を有する疎行列を係数行列とする連立一次方程式向けの実用的な精度保証手法〔Ogita, Nakajima 2019〕を適用し,精度保証を実施した.","subitem_description_type":"Other"}]},"item_4_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicPageEnd":"13","bibliographic_titles":[{"bibliographic_title":"研究報告ハイパフォーマンスコンピューティング(HPC)"}],"bibliographicPageStart":"1","bibliographicIssueDates":{"bibliographicIssueDate":"2020-07-23","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"2","bibliographicVolumeNumber":"2020-HPC-175"}]},"relation_version_is_last":true,"weko_creator_id":"44499"},"id":206308,"links":{}}