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Automatic travel time determination for a transfer function measured by ACROSS using the Sompi event analysis

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羽佐田 葉子; 熊澤 峰夫; 鶴我 佳代子; 國友 孝洋; 笠原 順三

Hasada, Yoko; Kumazawa, Mineo; Tsuruga, Kayoko; Kunitomo, Takahiro; Kasahara, Junzo

存否イベント解析はACROSSの基本的な解析法のひとつであり、伝達関数から時間的に局在する『イベント』を抽出する方法である。我々はその基本アルゴリズムを確立し、最尤法に基づいた改良を加えた。ACROSSの連続観測で得られる多くのデータを解析するためには、自動処理が必要となる。我々は存否イベント解析にいくつかのアルゴリズムを追加し、走時の自動決定の可能性をテストした。

The Sompi event analysis is a basic analysis method for ACROSS system, in which a set of time-localized events contained in the transfer function is extracted. Sompi is the Japanese word to mean existence or absence. We have established the fundamental algorithm and made revisions on the basis of Maximum Likelihood estimation (Hasada et al., 2004). To analyze numerous data acquired by continuous monitoring using ACROSS, automatic processing is necessary. We have attempted to improve the Sompi event analysis by using some additional techniques and examine the possibility of automatic travel time determination.

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