再発見を試みるユーザ 入力閲覧ページ出力同位ページ 以前に閲覧したページ 同位ページの推定 2. 1 [4], [13] Dubroy [4] [13] 4 [1], [2], [8], [10], [12] Nshmoto [8] Capra [2] Exact Path Su

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1 DEIM Forum 2015 B E-mal: Web 1. Web Web 44% [9] 33% [11] Web

2 再発見を試みるユーザ 入力閲覧ページ出力同位ページ 以前に閲覧したページ 同位ページの推定 2. 1 [4], [13] Dubroy [4] [13] 4 [1], [2], [8], [10], [12] Nshmoto [8] Capra [2] Exact Path Subset Move 4 Exact Path Subset Move Tyler [12] Pu [10] Adar [1] [5], [6], [7], [14] [14] Web 6 Morrs [7] Kawase [6] Ernak [5] PageRank URL P = {p 1,..., p n } p now p now p P

3 Generalzed Co-HITS [3] 4. 1 P = {p 1,..., p n} x y (x, y) G L = (P N L, E L ) N L = {y y = p, l j L} E L = {(x, y) x = p j, y = p, l j L} p P p j P l j L n T C j G T C = (P N T C, E T C ) N T C = {y y = n T C j, tc j T C} E T C = {(x, y) x {p, p j}, y = n T C j N T C } p P p j P tc j < j p P p j P TC G SQ = (P N SQ, E SQ ) N SQ = {y y = n SQ j mn, pn Cq, pm Cq j, sm p (p q, pq j ) > θ, pq P q, p q j P q } E SQ = {(x, y) x {p m, p n}, y = n SQ j mn N SQ } n SQ j mn 2 p P pj P p m P p n P p q P q P q P C q pq P q sm p (p, p j) p p j θ [0, 1] N-Gram N=2 TnySegmenter 1 Javascrpt 4. 2 Generalzed Co-HITS G = (P N, E) Generalzed Co-HITS p n p P Generalzed Co-HITS p P x n N y 1 taku/software/tnysegmenter/

4 x y x [0, 1] y [0, 1] x = (1 λ p)x 0 + λ p w np j yj (1) n j N y j = (1 λ n )y 0 j + λ n p P w pn j x (2) x 0 p y 0 j n j x 0 = y 0 j = 1 w np j w pn j wnp j n j p p P wnp j = n j N wpn j = 1 λ p [0, 1] λ n [0, 1] x 0 yj 0 x 0 y 0 j p n p n Web HTML p n x 0 = (1 a)sm p (p n, p ) + asm t (p n, p ) ( (1 a)sm p (p n, p k ) + asm t (p n, p k ) ) (3) p k P y 0 = 1/ N (4) a [0, 1] N sm t (p, p j ) N-Gram N=2 A B 5 C 1 D 4 B D C w np j = count(l j ) count(l jk ) p k P, w pn j = count(l j ) count(l k ) n k N L count(l j) p p j (5) w np j = 1 2, wpn j = count(tc j) count(tc k ) n k N L count(tc j ) p p j (6) w np j = 1 2, wpn j = 1 EdgeNum(p ) EdgeNum(p ) p 4. 3 (7) Generalzed Co-HITS p P x L x T C x SQ x = αx L + βx T C + γx SQ (8) α β γ ( 2) 3 1 2

5 ID URL ID html ID ID ID ID 4 MAP MAP() 0.271(0.314) (0.314) (0.360) (0.368) (0.364) (0.366) λ L λ T C λ QS α β γ a θ OS Wndows8 Frefox 2 Frefox P t1 2 P t2 p t2 P t1 P t2 P t p t2 Generalzed Co-HITS 1 p t1 j P t1 p t1 j P t1 MAP(Mean Average Precson) MAP p t1 j P t1 p t2 Generalzed Co-HITS MAP λ MAP MAP MAP 6

6 MAP 4.com - Google - Google.com 6. 2 Generalzed Co-HITS [1] Eytan Adar, Jame Teevan, and Susan T Dumas. Large scale analyss of web revstaton patterns. In Proceedngs of the SIGCHI conference on Human Factors n Computng Systems, pp ACM, [2] Robert G Capra III. An nvestgaton of fndng and refndng nformaton on the web. PhD thess, Vrgna Polytechnc Insttute and State Unversty, [3] Hongbo Deng, Mchael R Lyu, and Irwn Kng. A generalzed co-hts algorthm and ts applcaton to bpartte graphs. In Proceedngs of the 15th ACM SIGKDD nternatonal conference on Knowledge dscovery and data mnng, pp ACM, [4] Patrck Dubroy and Ravn Balakrshnan. A study of tabbed browsng among mozlla frefox users. In Proceedngs of the SIGCHI Conference on Human Factors n Computng Systems, pp ACM, [5] Magdaln Ernak, Mchals Vazrganns, and Dmtrs Kapoganns. Web path recommendatons based on page rankng and markov models. In Proceedngs of the 7th annual ACM nternatonal workshop on Web nformaton and data management, pp ACM, [6] Rcardo Kawase, George Papadaks, Eelco Herder, and Wolfgang Nejdl. Beyond the usual suspects: context-aware revstaton support. In Proceedngs of the 22nd ACM conference on Hypertext and hypermeda, pp ACM, [7] Dan Morrs, Meredth Rngel Morrs, and Gna Venola. Searchbar: a search-centrc web hstory for task resumpton and nformaton re-fndng. In Proceedngs of the SIGCHI Conference on Human Factors n Computng Systems, pp ACM, [8] Ippe Nshmoto and Masash Toda. Process-recollectve refndng on the web. In Proceedngs of the 2006 IEEE/WIC/ACM Internatonal Conference on Web Intellgence, pp IEEE Computer Socety, [9] Hartmut Obendorf, Harald Wenrech, Eelco Herder, and Matthas Mayer. Web page revstaton revsted: mplcatons of a long-term clck-stream study of browser usage. In Proceedngs of the SIGCHI conference on Human factors n computng systems, pp ACM, [10] Hsao-Teh Pu and Xn-Yu Jang. A comparson of how users search on web fndng and re-fndng tasks. In Proceedngs of the 2011 Conference, pp ACM, [11] Jame Teevan, Eytan Adar, Rose Jones, and Mchael AS Potts. Informaton re-retreval: repeat queres n yahoo s logs. In Proceedngs of the 30th annual nternatonal ACM SIGIR conference on Research and development n nformaton retreval, pp ACM, [12] Sarah K Tyler and Jame Teevan. Large scale query log analyss of re-fndng. In Proceedngs of the thrd ACM nternatonal conference on Web search and data mnng, pp ACM, [13].., [14],,,.. F8-4,

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