Web top-k TF-IDF Indri PRF 5 10 [7] Miyanishi TREC Microblog Track Indri (LM) 3 PRF (RM [8], EXRM [9], TBRM [4] [6]) PRF LM Miyanishi Tweet
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1 DEIM Forum 2015 G4-5 Web, GARKAVIJS,Viktors,, {lica,gvb,oyama}@nii.ac.jp ( SNS) Web Twitter Web Twitter Twitter TL Web Text Retrieval Conference (TREC) Web Track 2013 Ad Hoc Task TREC Twitter,, Twitter,, 1. Web PC Web Web Web Web Web Google Web 1 SNS (Social Network Services) Web Web 1 SNS SNS PRF Twitter TL PRF Web Text REtrieval Conference (TREC) 2013 Ad Hoc Task Twitter PRF 2. 1 Twitter Miyanishi PRF time-based [12] 2012 TREC Microblog Track Kim URL
2 Web top-k TF-IDF Indri PRF 5 10 [7] Miyanishi TREC Microblog Track Indri (LM) 3 PRF (RM [8], EXRM [9], TBRM [4] [6]) PRF LM Miyanishi Tweet selection Term selection 2 (TSF) [12] PRF Twitter Twitter TL PRF PRF Twitter Web ClueWeb Twitter Metzler Twitter 5 [11] Twitter Web Teevan Twitter social chatter ( ) social event ( ) Web navigational (Web ) [13] Twitter Web Twitter 2. 3 Borlund Interactive Information Retrieval (IIR) (SWT: Simulated Work Task) [1] [2] SWT Borlund test person 3 SWT [2] 1 (search statements) a b (a)(b) SWT test person SWT [1] Li 42 (real task) (simulated work task) sub-facet sub-facet Li 2 sub-faset Li SWT IIR sub-facet SWT [10] SWT TREC Web Track Twitter Twitter TL 3. Web Twitter PRF PRF Twitter TL PRF [ 1] Indri 5.6 Indri
3 k 1 Lavrenko [8] PRF PRF PRF Kim [7] :0.5 Dirichlet smoothing ( =2500; Indri ) 4. Indri Stop Words 5 10 PRF SWT [1] [2] (baseline, ClueWeb12-PRFB, Twitter-PRFB) Twitter TL PRF (Twitter- PRFB) (baseline) Twitter TL PRF ClueWeb12 PRF (ClueWeb12-PRFB) TREC Twitter Twitter TL TL Twitter Inc. API (REST API, Streaming API) mention TL Web Twitter TL
4 ドバックをするための文書集合として用いた 以下に取得した 照の為のシステムである PRF は提案手法と条件をそろえる TL の属性について記す ために 検索結果上位5文書から 10 語を拡張クエリ語として Twitter ID twi twi フォローしている Twitter アカウント数 642 人 2014 年 7 月 13 日現在 設定した それ以外はベースライン システムと同様とした 実験システム2 (Twitter-PRFB) Twitter のユーザ TL をフィードバックする文書として検索 ツイートの取得期間 2014 年 5 月 26 日から 6 月 25 日 するシステムである PRF を行うために まずテストコレク まで ションのクエリを用いて Twitter ユーザ TL から作成した検索 取得した英語ツイートの件数 9,100 件 用データセットを対象にクエリを用いて検索する ツイートの 重複したツイートは Twitter ユーザ TL をマージする際 検索結果上位5位までを PRF を行うための文書とし 実験シ に排除済み ステム1と同様に 5文書から 10 語選ぶように設定を行った 文書の形式 Twitter API を使用して取得した JSON 形 それ以外はベースライン システムと同様とした 式のデータを プログラムにより TRECTEXT 形式 (XML) 4. 4 実 験 手 順 に変換して保存する 提案手法に関する実験の手順は次の通りである [図 2] ClueWeb12 開始 ClueWeb12 は Lemur Project が提供する Web ページのコ レクションある ClueWeb12 は 2012 年 2 月 10 日から同年 5 月 10 日までに集められた英語の Web ページ 733,019,372 件 を含む Twitter TL取得 注 2 ClueWeb12 は 2013 年の TREC Web Track, Ad TL保存 Hoc Task 注 3 で用いられた 今回の実験はそのテストコレク ションを用いて行うため このデータセットを検索対象のデー タセットとした TREC Web Track 2013 Ad Hoc Task テストコレ クション TL TREC TEXT TREC 2013 Web AdHoc タスクQuery 検索結果1 Indri PRF用文書 5件/Query Track 2013, Ad Hoc Task のテストコレクションを使用した 次に実験用システムについて概要を説明する ベースライン システム (baseline) Indri 5.6 デフォルトの設定で IndriRunQuery という検索ク PRF用文書取得 TREC 2013 Web AdHoc タスクQuery PRF用パラメータ ファイル作成 エリを実行するプログラムを動かしたものをベースラインとし Indri た 主なデフォルト値は次の通りである 取得件数 1,000 件 疑似レレバンス フィードバック 無 クエリ言語 Indri Query Language スムージング: 凡例 入力 出力 検索 TL(TREC TEXT) TL検索用 パラメータ ファイル TL検索用パラメータ ファイル作成 実験に使うクエリとその正解データについては TREC Web 4. 3 実験用システム ユーザ TL PRF用 パラメータ ファイル ClueWeb 12 TREC評価 ツール 検索結果2 終了 評価結果 Dirichlet smoothing 図2 (μ = 2500, μ はスムージングパラメータ 2500 は Indri 提案手法の処理手順 のデフォルト値) 結果フォーマット TREC 1 作成したツイート取得用のプログラムにより取得した Twitter のツイート文書を JSON 形式から TRECTEXT 形式 実験システム1 (ClueWeb12-PRFB) Indri 5.6 の PRF を使ったシステムである フィードバックす る文書は ClueWeb12 である このシステムは Twitter のユー ザ TL をフィードバックする文書として検索した場合の比較対 に変換する 2 IndriBuildIndex でインデックスを構築する その際 Krovetz stemmer を適用し ストップワードは適用しない 3 インデックスされたツイート文書のデータセットをテ ストコレクションのクエリで検索する 注 2 Lemur Project, The ClueWeb12 Dataset, Dataset Details, 4 検索結果上位 5 位までの文書を PRF 用の文書として Summary Statistics より引用 Web 検索用のパラメータ ファイルに実験用に作成したプログ (accessed ) ラムにて自動的に登録する 注 3 TREC Web Track (accessed ) 5 作 成 し た ク エ リ パ ラ メ ー タ ファイ ル を 用 い て ClueWeb12 のデータセットを検索する クエリに対しては
5 6 7 t 8 ERR-IA@ ERR-IA (Intetnt Aware Expected Reciprocal Rank) TREC Web Track ERR [3] IA ERR [5] ERR-IA r R r r (R r = R(g)) g R i i R i R(g) R(g) := 2g 1 2 g max, g {0,..., g max} (1) R i := R(g i) (2) ERR [3] ERR := 5. n r=1 r 1 1 (1 R i )R r (3) r i=1 Twitter TL PRF R (version 3.1.2) TREC TREC Web Track Ad Hoc Task ERR-IA@10 [ 3] 5 PRF (0 ) 241 (1 ), 242 (4 ), 249 (1 ) t 95% (p < ) t baseline, ClueWeb12-PRFB, Twitter-PRFB t [ 4][ 1] Comparing of performance index: ERR IA@10 ERR IA@ ClueWeb12 baseline ClueWeb12 PRFB twitter_prfb 4 ERR-IA@10 [ 1] ERR-IA@10 baseline ERR IA@10 3 [ 2] PRF 0 ClueWeb12-PRFB 2 ERR-IA@10 Twitter-PRFB > baseline 214, 242, 248 Twitter-PRFB < baseline 205, 221, 240 Twitter-PRFB = baseline 216, 232, Twitter TL Twitter
6 Scatter Diagram of ERR ERR 提案手法 (Twitter-PRFB) ClueWeb12-PRFB baseline Query Numbers 3 ERR-IA@10 1 ERR-IA@10 t t p (p < ) ClueWeb12-PRFB vs. baseline Twitter-PRFB vs. baseline Twitter-PRFB vs. ClueWeb12-PRFB IT Health Care IT NASA [ 3] ERR-IA@10 t [ 3] Indri PRF 3 TREC 2013 Web Track TREC Bottom 25 topics [5] 214 capital gains tax rate Twitter TL 3 Top 25 topics 240 ( presidential middle names ) baseline Indri PRF 3(Key) baseline baseline ClueWeb12-PRFB 20 2(HRel) 3(Key) 1 2(Key) 0(Non) baseline ClueWeb12-PRFB 5 3(Key)
7 3 Twitter-PRFB > baseline Twitter-PRFB < baseline Twitter-PRFB = baseline baseline 0 1( ) ClueWeb12-PRFB 0 1( ) Twitter-PRFB 0 1( ) ( ) PRF 1 TL (1)PRF Twitter TL (2)PRF (3) PRF 6. 2 TREC Web Track 6-2(Junk) TREC ndeval -2 0(Non) [5] 0(Non; non relevant) 1(Rel; relevant) 2(HRel; highly relevant) 3(Key; Key page or site) 4(Nav; navigational page or site) (Non) 1(Rel) 2(HRel) 0(Non) TREC 20 TREC TREC ERR-IA baseline Twitter TL Twitter PRF TREC Web Track TL TL Twitter TL TL Twitter PRF TREC 2013 Web Track Ad Hoc Task 25 [1] Borlund, P.: Experimental components for the evaluation of interactive information retrieval systems, Journal of Documentation, Vol. 56, No. 1, pp (online), DOI /EUM (2000). [2] Borlund, P. and Ingwersen, P.: The development of a method for the evaluation of interactive information retrieval systems, Journal of Documentation, Vol. 53, No. 3, pp (online), DOI /EUM (1997). [3] Chapelle, O., Metlzer, D., Zhang, Y. and Grinspan, P.: Expected reciprocal rank for graded relevance, Proceeding of the 18th ACM conference on Information and knowledge
8 management - CIKM 09, New York, New York, USA, ACM Press, p.621 (online), DOI / (2009). [4] Choi, J. and Croft, W. B.: Temporal models for microblogs, Proceedings of the 21st ACM international conference on Information and knowledge management - CIKM 12, New York, New York, USA, ACM Press, p.2491 (online), DOI / (2012). [5] Collins-Thompson, K., Paul Bennett, Diaz, F., Clarke, C. L. A. and Voorhees, E. M.: TREC 2013 Web Track Overview, TREC 2013, (online), pubs/trec22/papers/web.overview.pdf (2013). [6] Keikha, M., Gerani, S. and Crestani, F.: Time-based relevance models, Proceedings of the 34th international ACM SIGIR conference on Research and development in Information - SIGIR 11, New York, New York, USA, ACM Press, p.1087 (online), DOI / (2011). [7] Kim, Y., Yeniterzi, R. and Callan, J.: Overcoming Vocabulary Limitations in Twitter Microblogs (2012). [8] Lavrenko, V. and Croft, W. B.: Relevance based language models, Proceedings of the 24th annual international ACM SIGIR conference on Research and development in information retrieval - SIGIR 01, New York, New York, USA, ACM Press, pp (online), DOI / (2001). [9] Li, X. and Croft, W. B.: Time-based language models, Proceedings of the twelfth international conference on Information and knowledge management - CIKM 03, New York, New York, USA, ACM Press, p.469 (online), DOI / (2003). [10] Li, Y. and Hu, D.: Interactive retrieval using simulated versus real work task situations: Differences in sub-facets of tasks and interaction performance, Proceedings of the American Society for Information Science and Technology, Vol. 50, No. 1, pp.1 10 (online), DOI /meet (2013). [11] Metzler, D. and Cai, C.: USC/ISI at TREC 2011: Microblog Track, In Proceedings of TREC 2011, (online), update.pdf (2011). [12] Miyanishi, T., Seki, K. and Uehara, K.: Improving pseudorelevance feedback via tweet selection, Proceedings of the 22nd ACM international conference on Conference on information & knowledge management - CIKM 13, New York, New York, USA, ACM Press, pp (online), DOI / (2013). [13] Teevan, J., Ramage, D. and Morris, M. R.: #TwitterSearch: a comparison of microblog search and web search, Proceedings of the fourth ACM international conference on Web search and data mining - WSDM 11, New York, New York, USA, ACM Press, p. 35 (online), DOI / (2011).
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