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1 DEIM Forum 2018 J () F URL SVM Identifying Know-How Sites basedonatopicmodelandclassifierlearning Jiaqi LI,ChenZHAO, Youchao LIN, Ding YI,ShutoKAWABATA, Takahide KASUGA, Takehito UTSURO, and Yasuhide KAWADA Grad. Sch. of Systems and Information Engineering, University of Tsukuba, Tsukuba Japan College of Engneering Systems, School of Science and Engineering, University of Tsukuba, Tsukuba Japan Faculty of Engineering, Information and Systems, University of Tsukuba, Tsukuba Japan Logworks Co., Ltd. Tokyo , Japan 1. Yahoo!, [5] AND [3] [5]

2 1 1 A B C D E 1 [3] URL

3 (/) , (51/31) , (40/45) 850 9, (45/57) , (57/32) 838 9, (45/47) 815 7, (28/70) 5,346 65, (266/282) AND N p P (s, N) N =20 P w P w = s S P (s, N) Google Custam Search API 1 p s S(p) { } S(p) = s S p P (s, N) SVM 2. Google 100 1,000 2 S s S 3. P w (LDA; Latent Dirichlet Allocation) [1] LDA w V w(w V ) K ( K =50 ) z n (n =1,...,K) w P (w z n)(w V ) p z n P (z n d) (n =1,...,K) p 1https://developers.google.com/custom-search/

4 URL 3 SVM f 1 : URL com org jp net co.jp 5 (f 11,...,f 15 ) f 2 : URL (Secure) (HTTPS) (HTTP) f 3 : f 4 : f 5 : f 6 : f 7 = f 3 f 4 : f 8 = f 7/f 5 :( )/() f 9 = f 5 f 6 : f 10 = f 5/f 6 : / p P w z n(n =1,...,K) P w(z n) { } P w(z n)= d P w zn = argmax P (z u d) z u (u=1,...,k) 4. [3] [3] P w A B C ( 2) [3] 30 P w 30 ( ) 2 1 A E A B C A (5. 5 ) 5. 1 URL URL com org jp net co.jp 5 (f 11,...,f 15) URL (Secure) (HTTPS) (HTTP) 5. 2 T t( T ) t P (t) p( P (t)) S(p) S(t) = p P (t) S(p) t S(t) t p( P (t)) S(p) p P (t)

5 PR 3 A 4 A t t 5. 3 t P (t) P (t) 5. 4 p( P (t)) p z(p) p z(p) = argmax P (z u p) z u (u=1,...,k) t( T ) p z(p) z(t) = p P (t) { z(p) } t z(t) p P (t) S(p) S(t)

6 5 A 2 ( )/( ) S(p) S(t) p P (t) P (t) 3 P (t) z(t) 4 / P (t) z(t) LIBSVM 2 RBF SVM f 7 10 f 1 6 f 1 4, https:// 3 () R conf c () S(conf > = c) (conf > = c) (conf > = c) (conf > = c)= R S(conf > = c) R (conf > = c)= R S(conf > = c) S(conf > = c) f 3 89 f f 7 35 f f 9 47 f 10 80

7 6 8. [6] [2] NTCIR-11 4 [2] Task Mining Task Task Mining Task [4] Task Mining Task 4http://research.nii.ac.jp/ntcir/ntcir-11/index-ja.html 9. [1] D. M. Blei, A. Y. Ng, and M. I. Jordan. Latent Dirichlet allocation. Journal of Machine Learning Research, Vol.3, pp , [2],,,,. Web. 6 DEIM, [3],,,,,,.. 9 DEIM, [4] Y. Liu, R. Song, M. Zhang, Z. Dou, T. Yamamoto, M. Kato, H. Ohshima, and K. Zhou. Overview of the NTCIR-11 IMine task. In Proc. 11th NTCIR Workshop Meeting, pp. 8 23, [5],,,,,,.. 7 DEIM, 2015.

8 4 : 1 10 / : A B / ID B B B B B A A A B A JOBRASS Jobweb Do 1 2 TOEIC SPIWEB (TG-WEB) [6] A. Sun, E.-P. Lim, and W.-K. Ng. Web classification using support vector machine. In Proc. 4th WIDM, pp , 2002.

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