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Ci niiによるリアルタイムデータマイニングの可能性
1.
CiNiiによるリアルタイムデータマイニングの可能性 平成22年1月30日 マイニング探検会 前田朗
2.
CiNiiと決定木を組み合わせる? 「CiNiiと決定木しばり」で何ができるかを考える CiNiiの制約
雑誌論文検索 「雑誌名」「巻号」「年次」「タイトル」「ページ」「要旨」「全文リンク」などの情報を取り出し可能 決定木 分類器のひとつ 人間にわかりやすい結果を出す 学習データ(パターンと正解)が必要 データマイニングのしばりとして、相応のデータ数が必要
3.
CiNiiで学習データを用意する 検索結果をそのまま解析する方向で「思考実験」
4.
検索結果をパターン化する ある程度、入力と正解をパターン化しないとデータマイニングがうまく働かないというのはあります 雑誌タイトル -> パターンとして使えるかも
第一著者 -> パターンとして使えるかも 年次 -> 連続値として使用可能 論文タイトル&要旨 工夫をすれば使えるかも ちょっとしたブレイクスルーが必要
5.
論題&要旨をパターン化 単純にクラスタリング(教師データ不要の分類)をすればパターン化可能 クラスタB
クラスタA クラスタC そういえば、GETAにはクラスタの代表単語を出す機能があったような….
6.
どう決定木にかけるか 入力データ 雑誌名(クラス=離散値)
第一著者(クラス=離散値) 年次(連続値) 正解データ 論題&要旨のクラスタ(with クラスタの代表単語) これらのデータを多数集めることで「教師データ」とする。 ヒット件数が(たとえば)100件以上のときに動かすとか
7.
CiNiiへの付加価値 決定木なので、「雑誌名」「第一著者」「年次」がどの条件のときに、どの論文グループになるかを図示できる リアルタイムで決定木を使うのはセオリー外だがそれはそれで面白いかも
制約上、ヒット件数が多いときのみ有効 逆転の発想で、ヒット件数が多いときのレポート機能と考える CiNii検索結果のリアルタイムレポート機能として有効かどうか?
8.
アイデアをどう評価する? 机上で検討 実験(今回はちょっと面倒そう)
実装(さらに面倒そう) ほかにも有効な方法があるかもしれないので、それを考えるとか
9.
参考 決定木のWikipedia記事 http://ja.wikipedia.org/wiki/%E6%B1%BA%E5%AE%9A%E6%9C%A8
データクラスタリングのWikipedia記事 http://ja.wikipedia.org/wiki/%E3%83%87%E3%83%BC%E3%82%BF%E3%83%BB%E3%82%AF%E3%83%A9%E3%82%B9%E3%82%BF%E3%83%AA%E3%83%B3%E3%82%B0
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