{"created":"2023-06-20T14:38:13.455924+00:00","id":4718,"links":{},"metadata":{"_buckets":{"deposit":"42de4a16-fab9-4460-b796-3d4b71eeba3b"},"_deposit":{"created_by":1,"id":"4718","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"4718"},"status":"published"},"_oai":{"id":"oai:jaxa.repo.nii.ac.jp:00004718","sets":["1398:1530:1539","1543:1874:1883","1887:1891","9:789:920:925"]},"author_link":["21383","21382","21378","21379","21381","21380"],"item_5_alternative_title_2":{"attribute_name":"その他のタイトル（英）","attribute_value_mlt":[{"subitem_alternative_title":"Large-Scale Data Compression Method for Building-Cube Method"}]},"item_5_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2011-02-28","bibliographicIssueDateType":"Issued"},"bibliographicVolumeNumber":"JAXA-SP-10-012","bibliographic_titles":[{"bibliographic_title":"宇宙航空研究開発機構特別資料: 第42回流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2010 論文集"},{"bibliographic_title":"JAXA Special Publication: Proceedings of 42nd Fluid Dynamics Conference / Aerospace Numerical Simulation Symposium 2010","bibliographic_titleLang":"en"}]}]},"item_5_description_14":{"attribute_name":"会議概要（会議名, 開催地, 会期, 主催者等）","attribute_value_mlt":[{"subitem_description":"第42回流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2010 (2010年6月24日-25日. 米子コンベンションセンター BiG SHiP)","subitem_description_type":"Other"}]},"item_5_description_15":{"attribute_name":"会議概要（会議名, 開催地, 会期, 主催者等）（英）","attribute_value_mlt":[{"subitem_description":"42nd Fluid Dynamics Conference / Aerospace Numerical Simulation Symposium 2010 (June 24-25,  2010. Yonago Convention Center BiG SHiP), Yonago, Tottori Japan","subitem_description_type":"Other"}]},"item_5_description_17":{"attribute_name":"抄録（英）","attribute_value_mlt":[{"subitem_description":"A compression method for large-scale flow field data has been developed. This method employs discrete wavelet transform, quantization, and entropy coding for compression. Discrete wavelet transform divides the data into approximation part and detail part, then quantization and entropy coding reduce the amount of data. Compressed data (Plot3D format) is computed by an incompressible Navier-Stokes flow solver using block-structured Cartesian mesh, Building-Cube Method. The quantization bit rate is variable according to the importance of flow field, which leads to efficient data compression because high quantization bit rate is assigned to the important region only. In compression case of two-dimensional cylinder, the effects of the discrete wavelet transform and the variable quantization bit rate were demonstrated. Then flow field data around sphere was compressed to define data quality needed for visualization. Following these compressions, instantaneous large-scale flow field data with O(10(exp 8)） mesh points was successfully compressed with root mean square error and maximum quantization error suppressed to O(10(exp -4)) and O(10(exp -3)), respectively. This compression technique was then extended for timeseries flow field data. By compressing the difference between the current flow variables and previous decompressed ones, higher compression ratio was achieved compared to the direct compression of each time-step flow separately.","subitem_description_type":"Other"}]},"item_5_description_18":{"attribute_name":"内容記述","attribute_value_mlt":[{"subitem_description":"形態: カラー図版あり","subitem_description_type":"Other"}]},"item_5_description_19":{"attribute_name":"内容記述（英）","attribute_value_mlt":[{"subitem_description":"Physical characteristics: Original contains color illustrations","subitem_description_type":"Other"}]},"item_5_description_32":{"attribute_name":"資料番号","attribute_value_mlt":[{"subitem_description":"資料番号: AA0064967011","subitem_description_type":"Other"}]},"item_5_description_33":{"attribute_name":"レポート番号","attribute_value_mlt":[{"subitem_description":"レポート番号: JAXA-SP-10-012","subitem_description_type":"Other"}]},"item_5_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"宇宙航空研究開発機構"}]},"item_5_publisher_9":{"attribute_name":"出版者（英）","attribute_value_mlt":[{"subitem_publisher":"Japan Aerospace Exploration Agency (JAXA)"}]},"item_5_source_id_21":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"1349-113X","subitem_source_identifier_type":"ISSN"}]},"item_5_source_id_24":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AA11984031","subitem_source_identifier_type":"NCID"}]},"item_5_text_6":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"東北大学大学院工学研究科航空宇宙工学専攻"},{"subitem_text_value":"東北大学大学院工学研究科航空宇宙工学専攻"},{"subitem_text_value":"東北大学大学院工学研究科航空宇宙工学専攻"}]},"item_5_text_7":{"attribute_name":"著者所属（英）","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"Department of Aerospace Engineering, Graduate School of Engineering, Tohoku University"},{"subitem_text_language":"en","subitem_text_value":"Department of Aerospace Engineering, Graduate School of Engineering, Tohoku University"},{"subitem_text_language":"en","subitem_text_value":"Department of Aerospace Engineering, Graduate School of Engineering, Tohoku University"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"坂井, 玲太郎"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"佐々木, 大輔"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"中橋, 和博"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Sakai, Ryotaro","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Sasaki, Daisuke","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Nakahashi, Kazuhiro","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2020-01-16"}],"displaytype":"detail","filename":"64967011.pdf","filesize":[{"value":"1.5 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"64967011.pdf","url":"https://jaxa.repo.nii.ac.jp/record/4718/files/64967011.pdf"},"version_id":"e5c37e8a-29e7-45d2-80c7-d0eea6efb12d"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"conference paper","resourceuri":"http://purl.org/coar/resource_type/c_5794"}]},"item_title":"直交格子積み上げ法による大規模流体計算データの圧縮に関する研究","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"直交格子積み上げ法による大規模流体計算データの圧縮に関する研究"}]},"item_type_id":"5","owner":"1","path":["925","1539","1883","1891"],"pubdate":{"attribute_name":"公開日","attribute_value":"2015-03-26"},"publish_date":"2015-03-26","publish_status":"0","recid":"4718","relation_version_is_last":true,"title":["直交格子積み上げ法による大規模流体計算データの圧縮に関する研究"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-06-21T08:33:06.197161+00:00"}