{"created":"2021-03-01T06:51:19.916010+00:00","id":32639,"links":{},"metadata":{"_buckets":{"deposit":"d0563100-dc60-4d24-be70-13dfe7944d37"},"_deposit":{"id":"32639","owner":"1","owners":[],"pid":{"revision_id":0,"type":"depid","value":"32639"},"status":"published"},"_oai":{"id":"oai:repository.dl.itc.u-tokyo.ac.jp:00032639","sets":["80:4535:4649:4650","9:504:4538:4651:4652"]},"author_link":["126484","126485","126486","126487","126480","126481","126482","126483"],"item_4_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"Waveform of Digital Signal for a 3-D Electric Structure Sounding Using Accurately Controlled Electromagnetic Waves"}]},"item_4_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2001-03-29","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"3-4","bibliographicPageEnd":"392","bibliographicPageStart":"375","bibliographicVolumeNumber":"75","bibliographic_titles":[{"bibliographic_title":"東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo"}]}]},"item_4_description_13":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_description":"application/pdf","subitem_description_type":"Other"}]},"item_4_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"In order to determine an electric 3-D (three dimensional) structure and monitor its temporal variation, the controlled source technique using electromagnetic wave with multiple frequencies is useful. When the amplitudes and the phases of the electromagnetic waves are accurately controlled, we can measure the transfer function of transmitted and received waves. In order to decrease errors in measurements and analysis, the SNR (signal to noise ratio) should be high and be constant. Digital signals can easily control the SNR, because they have the following merits: the signal can be designed to have 1) narrow frequency band, 2) sharp cut-off frequency, 3) amplitude of frequency response determined from amplitudes of the transfer function and background noise, and 4) phase of frequency response requested for. In actual measurements, the transfer function is first measured using preliminary determined transmitted signal after measuring background noise. Next, the signal is designed using measured transfer function and noise, and the transfer function with a better SNR is obtained.","subitem_description_type":"Abstract"}]},"item_4_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"126484","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Yokoyama, Yukiko"}]},{"nameIdentifiers":[{"nameIdentifier":"126485","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Kumazawa, Mineo"}]},{"nameIdentifiers":[{"nameIdentifier":"126486","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Kunitomo, Takahiro"}]},{"nameIdentifiers":[{"nameIdentifier":"126487","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Nakajima, Takahiro"}]}]},"item_4_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15083/0000032639","subitem_identifier_reg_type":"JaLC"}]},"item_4_publisher_20":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"東京大学地震研究所"}]},"item_4_source_id_10":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN00162258","subitem_source_identifier_type":"NCID"}]},"item_4_source_id_8":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"00408972","subitem_source_identifier_type":"ISSN"}]},"item_4_subject_15":{"attribute_name":"日本十進分類法","attribute_value_mlt":[{"subitem_subject":"453","subitem_subject_scheme":"NDC"}]},"item_4_text_21":{"attribute_name":"出版者別名","attribute_value_mlt":[{"subitem_text_value":"Earthquake Research Institute, University of Tokyo"}]},"item_4_text_4":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"核燃料サイクル開発機構東濃地科学センター"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"横山, 由紀子"}],"nameIdentifiers":[{"nameIdentifier":"126480","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"熊澤, 峰夫"}],"nameIdentifiers":[{"nameIdentifier":"126481","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"國友, 孝洋"}],"nameIdentifiers":[{"nameIdentifier":"126482","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"中島, 崇裕"}],"nameIdentifiers":[{"nameIdentifier":"126483","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2017-06-26"}],"displaytype":"detail","filename":"ji0753003.pdf","filesize":[{"value":"982.4 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"ji0753003.pdf","url":"https://repository.dl.itc.u-tokyo.ac.jp/record/32639/files/ji0753003.pdf"},"version_id":"784762ec-07ad-4d46-b43d-7f02869676b9"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"electromagnetic sounding","subitem_subject_scheme":"Other"},{"subitem_subject":"frequency domain","subitem_subject_scheme":"Other"},{"subitem_subject":"signal processing","subitem_subject_scheme":"Other"}]},"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":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"精密に制御された電磁波を用いた3次元精密構造探査のためのディジタル信号波形の設計","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"精密に制御された電磁波を用いた3次元精密構造探査のためのディジタル信号波形の設計","subitem_title_language":"ja"}]},"item_type_id":"4","owner":"1","path":["4650","4652"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2008-05-30"},"publish_date":"2008-05-30","publish_status":"0","recid":"32639","relation_version_is_last":true,"title":["精密に制御された電磁波を用いた3次元精密構造探査のためのディジタル信号波形の設計"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2022-12-19T05:38:01.421686+00:00"}