introintrointrointrointrointrointrointro

jio jio jio jio jio jio jio jio jio jio jio jio jio jio jio jio jio jio jio jio vv

1. Course Overview: An Introduction to Information Retrieval and Applications J. H. Wang Feb. 17, 2014

2. IR, Spring 2014 www.Vidyarthiplus.com 2 Instructor & TA Instructor J. H. Wang ( 王正豪 ) Associate Professor, CSIE, NTUT Office: R1534, Technology Building E-mail: [email protected] Tel: ext. 4238 Office Hour: 9:00-12:00 am, every Tuesday and Thursday TA TBD (R1424, Technology Building)

3. IR, Spring 2014 www.Vidyarthiplus.com 3 Course Description Course Web Page: for the latest announcements and updates of schedule, slides, and homeworks http://www.ntut.edu.tw/~jhwang/IR/ Time: 9:10-12:00am, Fri. Classroom: R334, Technology Building Textbook: Christopher D. Manning, Prabhakar Raghavan and Hinrich Schuetze, Introduction to Information Retrieval , Cambridge University Press, 2008. Available online International Student Edition, imported by Kai-Fa ( 開發 ) Publishing Prerequisites: Basic knowledge of data structures and algorithms , linear algebra , and probability theory Programming experience is *required* for homeworks & projects

4. Target Audience Seniors Master students IMEECS (International Master’s Program in Electrical Engineering and Computer Science) IR, Spring 2014 www.Vidyarthiplus.com 4

5. IR, Spring 2014 www.Vidyarthiplus.com 5 Additional References References: Ricardo Baeza-Yates and Berthier Ribeiro-Neto, Modern Information Retrieval: The Concepts and Technology behind Search , Addison-Wesley, 2011. This is the second edition of their book Modern Information Retrieval in 1999. ( 華通 ) Bruce Croft, Donald Metzler, and Trevor Strohman, Search Engines: Information Retrieval in Practice , Addison-Wesley, 2010. ( 全華 ) Stefan Buettcher, Charles L.A. Clarke, and Gordon V. Cormack, Information Retrieval: Implementing and Evaluating Search Engines , MIT Press, 2010.

6. IR, Spring 2014 www.Vidyarthiplus.com 6 More Books on IR Gerald Salton, Automatic information organization and retrieval, McGraw-Hill, 1968. Gerald Salton and M.J. McGill, Introduction to modern information retrieval, McGraw-Hill, 1983. Two classics, but out-of-print. C. J. van Rijsbergen, Information Retrieval , Butterworths, 1979. The classic. More than 40 years old, but still worth reading. K. Sparck Jones, P. Willett, Readings in Information Retrieval , Morgan Kaufmann, 1997. A collection of classical IR papers. (out of print) I.H. Witten, A. Moffat, T.C. Bell. Morgan Kaufmann, Managing Gigabytes , 2nd edition, 1999. The authority on index construction and compression.

7. IR, Spring 2014 www.Vidyarthiplus.com 7 Grading Policy Homework assignments and programming exercises: ~40% Mid-term exam: ~25% Term project: ~35% Including proposal, presentation, and final report

8. IR, Spring 2014 www.Vidyarthiplus.com 8 Programming Exercises and Term Project About 3 programming exercises Team-based (at most 2 persons per team) You can either write your own code or reuse existing open source code The term project Either team-based system development (the same as programming exercises) Or academic paper presentation Only one person per team allowed A proposal is *required* before midterm ( Apr. 11, 2014 )

9. IR, Spring 2014 www.Vidyarthiplus.com 9 About the Term Project The score you get depends on the functions, difficulty and quality of your project For system development: System functions and correctness For academic paper presentation Quality and your presentation of the paper Major methods/experimental results *must* be presented Papers from top conferences are strongly suggested E.g. SIGIR, WWW, CIKM, WSDM, JCDL, ICMR, … Proposals are *required* for each team , and will be counted in the score

10. IR, Spring 2014 www.Vidyarthiplus.com 10 Online Submission Submission instructions Programs, project proposals, and project reports in electronic files must be submitted to the TA online at: Submissions website: (TBD) Before submission: User name: Your student ID Please change your default password at your first login

11. IR, Spring 2014 www.Vidyarthiplus.com 11 What this Course is NOT about This course will NOT tell you The tips and tricks of using search engines, although power users might have better ideas on how to improve them There’re plenty of books and websites on that… How to find books in libraries, although it’s somewhat related to the basic IR concepts How to make money on the Web, although the currently largest search engine did it

12. What’s Information Retrieval? Things that you have been doing all day! Searching for something interesting: Web, news, e-mail, image, video, … Asking for advices … User interests are changing all the time… 2011: New Zealand Earthquake 2012: Jeremy Lin 2013: Meteor Russia 2014: ? (next slide) IR, Spring 2014 www.Vidyarthiplus.com 12

13. IR, Spring 2014 www.Vidyarthiplus.com 13 What’s Information Retrieval

14. In Google News IR, Spring 2014 www.Vidyarthiplus.com 14

15. IR, Spring 2014 www.Vidyarthiplus.com 15

16. IR, Spring 2014 www.Vidyarthiplus.com 16 In Wikipedia

17. IR, Spring 2014 www.Vidyarthiplus.com 17

18. In Google Images IR, Spring 2014 www.Vidyarthiplus.com 18

19. IR, Spring 2014 www.Vidyarthiplus.com 19

20. IR, Spring 2014 www.Vidyarthiplus.com 20 In Google Video Search

21. IR, Spring 2014 www.Vidyarthiplus.com 21 In Google Translate…

22. IR, Spring 2014 www.Vidyarthiplus.com 22 Or More Related Keywords Blast Explosion Chelyabinsk Asteroid 2012 DA14 …

23. What if We Search in Chinese IR, Spring 2014 www.Vidyarthiplus.com 23

24. IR, Spring 2014 www.Vidyarthiplus.com 24 And More… 流星 彗星 隕石 俄羅斯 地球 … And other languages… And other search engines… And social websites…

25. IR, Spring 2014 www.Vidyarthiplus.com 25 In Google Trends

26. IR, Spring 2014 www.Vidyarthiplus.com 26 And More…

27. IR, Spring 2014 www.Vidyarthiplus.com 27 And Other Keywords…

28. IR, Spring 2014 www.Vidyarthiplus.com 28 And Social Search…

29. How do I Know What People Care about? IR, Spring 2014 www.Vidyarthiplus.com 29

30. IR, Spring 2014 www.Vidyarthiplus.com 30

31. What are People Searching in Taiwan? IR, Spring 2014 www.Vidyarthiplus.com 31

32. IR, Spring 2014 www.Vidyarthiplus.com 32 What Is Information Retrieval? “Information retrieval is a field concerned with the structure, analysis, organization, storage, searching , and retrieval of information.” (Salton, 1968)

33. IR, Spring 2014 www.Vidyarthiplus.com 33 Goal Information retrieval (IR): a research field that targets at effectively and efficiently searching information in text and multimedia documents In this course, we will introduce the basic text and query models in IR, retrieval evaluation, indexing and searching, and applications for IR

34. IR, Spring 2014 www.Vidyarthiplus.com 34 A Big Picture

35. IR, Spring 2014 www.Vidyarthiplus.com 35 Inverted Index User Interface Text Operations Query Expansion Indexing Retrieval Ranking Text query user need user feedback ranked docs retrieved docs Doc representation logical view inverted file Document Collection

36. IR, Spring 2014 www.Vidyarthiplus.com 36 Topics Text IR Indexing and searching Query languages and operations Retrieval evaluation Modeling Boolean model Vector space model Probabilistic model Applications for IR Multimedia IR Web search Digital libraries

37. IR, Spring 2014 www.Vidyarthiplus.com 37 Organization of the Textbook Basics in IR (focus) Inverted indexes for boolean queries (Ch.1-5) Term weighting and vector space model (Ch. 6-7) Evaluation in IR (Ch. 8) Advanced Topics Relevance feedback (Ch. 9) XML retrieval (Ch. 10) Probabilistic IR (Ch. 11) Language models (Ch. 12) Machine learning in IR (useful) Text classification (Ch. 13-15) Document clustering (Ch. 16-18) Web Search Web crawling and indexes (Ch. 19-20) Link analysis (Ch. 21)

38. Some Overlap with Other Fields Text mining Machine Learning Natural Language Processing Social Network Analysis … IR, Spring 2014 www.Vidyarthiplus.com 38

39. IR, Spring 2014 www.Vidyarthiplus.com 39 Pointers to Other Topics Cross-language IR Image, video, and multimedia IR Speech retrieval Music retrieval User interfaces Parallel, distributed, and P2P IR Digital libraries Information science perspective Logic-based approaches to IR Natural language processing techniques …

40. IR, Spring 2014 www.Vidyarthiplus.com 40 Tentative Schedule Before midterm Boolean retrieval (1 wk) Indexing (2 wks) Vector space model and evaluation (2 wk) Relevance feedback (1 wk) Probabilistic IR (2 wk) After midterm Text classification (1-2 wk) Document clustering (1-2 wk) Web search (2 wks) Advanced topics: CLIR, IE, … (2 wks) Term Project Presentation (3 wks)

41. IR, Spring 2014 www.Vidyarthiplus.com 41 Generic Resources Wikipedia page on Information Retrieval: http://en.wikipedia.org/wiki/Information_retrieval Information Retrieval Resources: http://www-csli.stanford.edu/~hinrich/information-retrieval.html

42. IR, Spring 2014 www.Vidyarthiplus.com 42 Academic Resources Journals ACM TOIS: Transactions on Information Systems JASIST: Journal of the American Society of Information Sciences IP&M: Information Processing and Management IEEE TKDE: Transactions on Knowledge and Data Engineering Conferences ACM SIGIR: International Conference on Information Retrieval WWW: World Wide Web Conference ACM CIKM: Conference on Information Knowledge and Management JCDL: ACM/IEEE Joint Conference on Digital Libraries ACM WSDM: International Conference on Web Search and Data Mining TREC: Text Retrieval Conference

43. Teaching in English… Slides and lectures will be offered mainly in English For better understanding for domestic students, important concepts will be briefly summarized in Chinese IR, Spring 2014 www.Vidyarthiplus.com 43

44. IR, Spring 2014 www.Vidyarthiplus.com 44 Thanks for Your Attention! Any question or comment? Please feel free to send e-mails to [email protected] or discuss with me at my office