{"_buckets": {"deposit": "98581194-7801-4452-9486-fe9efbfb3cc6"}, "_deposit": {"id": "5843", "owners": [1], "pid": {"revision_id": 0, "type": "depid", "value": "5843"}, "status": "published"}, "_oai": {"id": "oai:nied-repo.bosai.go.jp:00005843", "sets": []}, "author_link": [], "item_10001_biblio_info_7": {"attribute_name": "書誌情報", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "1980", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "2", "bibliographicPageEnd": "140", "bibliographicPageStart": "131", "bibliographicVolumeNumber": "33", "bibliographic_titles": [{"bibliographic_title": "地震 第２輯", "bibliographic_titleLang": "ja"}, {"bibliographic_title": "Zisin (Journal of the Seismological Society of Japan. 2nd ser.)", "bibliographic_titleLang": "en"}]}]}, "item_10001_description_5": {"attribute_name": "抄録", "attribute_value_mlt": [{"subitem_description": "As the first step of computer-based automatic processing of short-period seismic signals, distinctive features of signals and noise series must be well recognized. A parametric model of autoregressive (AR) process of the second order is successfully applied to microearthquake signals and noises in order to extract the features in frequency domain. Characteristic differences between P-waves, S-waves, coda waves and noises are well described by the two autoregressive coefficients (\u003ci\u003ea\u003c/i\u003e\u003csub\u003e1\u003c/sub\u003e, \u003ci\u003ea\u003c/i\u003e\u003csub\u003e2\u003c/sub\u003e) of the second order and residual variance (σ\u003csub\u003e\u003ci\u003eZ\u003c/i\u003e\u003c/sub\u003e\u003csup\u003e2\u003c/sup\u003e). The time evolution in terms of the estimated autoregressive coefficients (a\u003csub\u003e1\u003c/sub\u003e, a\u003csub\u003e2\u003c/sub\u003e) shows anticlockwise turn along the elliptic locus when seismic signals are added to noise series. It is proved that this evolution indicates the variation of temporal peak frequency vs. power diagrams showing roughly dynamic power spectrum of the events. On the basis of temporal variations of the autoregressive coefficients, we may discriminate between P-waves and S-waves in the seismic traces.", "subitem_description_language": "en", "subitem_description_type": "Other"}]}, "item_10001_publisher_8": {"attribute_name": "出版者", "attribute_value_mlt": [{"subitem_publisher": "公益社団法人 日本地震学会", "subitem_publisher_language": "ja"}, {"subitem_publisher": "SEISMOLOGICAL SOCIETY OF JAPAN", "subitem_publisher_language": "en"}]}, "item_10001_relation_14": {"attribute_name": "DOI", "attribute_value_mlt": [{"subitem_relation_type_id": {"subitem_relation_type_id_text": "10.4294/zisin1948.33.2_131"}}]}, "item_10001_source_id_9": {"attribute_name": "ISSN", "attribute_value_mlt": [{"subitem_source_identifier": "1883-9029", "subitem_source_identifier_type": "EISSN"}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "浜口 博之", "creatorNameLang": "ja"}, {"creatorName": "HAMAGUCHI Hiroyuki", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "森田 裕一", "creatorNameLang": "ja"}, {"creatorName": "MORITA Yuichi", "creatorNameLang": "en"}]}]}, "item_title": "2次自己回帰過程による短周期地震波の表現", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "2次自己回帰過程による短周期地震波の表現", "subitem_title_language": "ja"}, {"subitem_title": "Second-Order Autoregressive Representation of Short-Period Seismic Waves", "subitem_title_language": "en"}]}, "item_type_id": "40001", "owner": "1", "path": ["1670839190650"], "permalink_uri": "https://nied-repo.bosai.go.jp/records/5843", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2023-03-30"}, "publish_date": "2023-03-30", "publish_status": "0", "recid": "5843", "relation": {}, "relation_version_is_last": true, "title": ["2次自己回帰過程による短周期地震波の表現"], "weko_shared_id": -1}