| アイテムタイプ |
デフォルトアイテムタイプ（フル）(1) |
| 公開日 |
2025-06-06 |
| タイトル |
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|
タイトル |
KASYS at the NTCIR-18 SUSHI Task |
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言語 |
en |
| 作成者 |
Haruki Fujimaki
Makoto P. Kato
|
| 内容記述 |
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|
内容記述タイプ |
Abstract |
|
内容記述 |
This paper describes the KASYS team's participation in the NTCIR-18 SUSHI Task by presenting a multi-level metadata aggregation and retrieval approach for Subtask A, which focuses on retrieving undigitized historical materials with sparse item-level metadata. Our system leverages the hierarchical organization of the data---comprising Box, Folder, and Item levels---by aggregating metadata from lower to higher levels and applying two search strategies (``Merge'' and ``Each''). We evaluate traditional BM25 alongside dense retrieval models (E5 and ColBERT) without fine-tuning, and hyperparameter optimization using Optuna is employed to determine the optimal weight for each level. Although our multi-level score aggregation strategy was designed to exploit the hierarchical structure of the data, it did not yield a significant performance improvement over a simpler BM25 baseline. Future work will explore improved preprocessing of noisy metadata, hybrid retrieval methods combining BM25 with dense re-ranking, and model fine-tuning to further enhance performance in searching undigitized archival collections. |
|
言語 |
en |
| 出版者 |
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|
出版者 |
NII Institutional Repository |
|
言語 |
en |
| 日付 |
|
|
日付 |
2025-06-06 |
|
日付タイプ |
Issued |
| 言語 |
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|
言語 |
eng |
| 資源タイプ |
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|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_5794 |
|
資源タイプ |
conference paper |
| ID登録 |
|
|
ID登録 |
10.20736/0002002089 |
|
ID登録タイプ |
JaLC |
| 関連情報 |
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|
関連タイプ |
isReferencedBy |
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|
識別子タイプ |
URI |
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関連識別子 |
https://research.nii.ac.jp/ntcir/ntcir-18/index.html |
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言語 |
en |
|
|
関連名称 |
NTCIR-18 Conference |
| 開始ページ |
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|
開始ページ |
none |
| 会議記述 |
|
|
|
会議名 |
NTCIR-18 Conference |
|
|
言語 |
en |
|
回次 |
18 |
|
|
主催機関 |
National Institute of Informatics |
|
|
言語 |
en |
|
|
開始年 |
2025 |
|
|
開始月 |
6 |
|
|
開始日 |
10 |
|
|
終了年 |
2025 |
|
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終了月 |
6 |
|
|
終了日 |
13 |
|
|
開催期間 |
June 10-13, 2025 |
|
|
言語 |
en |
|
|
開催会場 |
National Institute of Informatics |
|
|
言語 |
en |
|
開催国 |
JPN |
02-NTCIR18-SUSHI-FujimakiH.pdf (684.9 KB)
