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From Data to Knowledge: Web-Based Knowledge Engineering System

From Data to Knowledge: Web-Based Knowledge Engineering System. C.-C. Chan Department of Computer Science University of Akron Akron, OH 44325-4003 USA chan@uakron.edu. Outline. Overview of Data Mining Software Tools A Rule-Based System for Data Mining Concluding Remarks.

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From Data to Knowledge: Web-Based Knowledge Engineering System

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  1. From Data to Knowledge:Web-Based Knowledge Engineering System C.-C. Chan Department of Computer Science University of Akron Akron, OH 44325-4003 USA chan@uakron.edu UA Faculty Forum 2008 by C.-C. Chan

  2. Outline • Overview of Data Mining • Software Tools • A Rule-Based System for Data Mining • Concluding Remarks UA Faculty Forum 2008 by C.-C. Chan

  3. Data Mining (KDD) • From Data to Knowledge • Process of KDD (Knowledge Discovery in Databases) • Related Technologies • Comparisons UA Faculty Forum 2008 by C.-C. Chan

  4. Why KDD? We are drowning in information, but starving for knowledge John Naisbett Growing Gap between Data Generation and Data Understanding: Automation of business activities: Telephone calls, credit card charges, medical tests, etc. Earth observation satellites: Estimated will generate one terabyte (1015 bytes) of data per day. At a rate of one picture per second. Biology: Human Genome database project has collected over gigabytes of data on the human genetic code [Fasman, Cuticchia, Kingsbury, 1994.] US Census data: NASA databases: … World Wide Web: UA Faculty Forum 2008 by C.-C. Chan

  5. Process of KDD [1] Fayyad, U., Editorial, Int. J. of Data Mining and Knowledge Discovery, Vol.1, Issue 1, 1997. [2] Fayyad, U., G. Piatetsky-Shapiro, and P. Smyth, "From data mining to knowledge discovery: an overview," in Advances in Knowledge Discovery and Data Mining, Fayyad et al (Eds.), MIT Press, 1996. UA Faculty Forum 2008 by C.-C. Chan

  6. Process of KDD • Selection • Learning the application domain • Creating a target dataset • Pre-Processing • Data cleaning and preprocessing • Transformation • Data reduction and projection • Data Mining • Choosing the functions and algorithms of data mining • Association rules, classification rules, clustering rules • Interpretation and Evaluation • Validate and verify discovered patterns • Using discovered knowledge UA Faculty Forum 2008 by C.-C. Chan

  7. Typical Data Mining Tasks • Finding Association Rules [Rakesh Agrawal et al, 1993] • Each transaction is a set of items. Given a set of transactions, an association rule is of the form X  Y where X and Y are sets of items. • e.g.: 30% of transactions that contain beer also contain diapers; • 2% of all transactions contain both of these items. Applications: • Market basket analysis and cross-marketing • Catalog design • Store layout • Buying patterns UA Faculty Forum 2008 by C.-C. Chan

  8. Finding Sequential Patterns • Each data sequence is a list of transactions. • Find all sequential patterns with a user-specified minimum support. • e.g.: Consider a book-club database • A sequential pattern might be • 5% of customers bought “Harry Potter I”, then “Harry Potter II”, and then “Harry Potter III”. Applications: • Add-on sales • Customer satisfaction • Identify symptoms/diseases that precede certain diseases UA Faculty Forum 2008 by C.-C. Chan

  9. Finding Classification Rules • Finding discriminant rules for objects of different classes. • Approaches: • Finding Decision Trees • Finding Production Rules Applications: • Process loans and credit cards applications • Model identification UA Faculty Forum 2008 by C.-C. Chan

  10. Text Mining • Web Usage Mining • Etc. UA Faculty Forum 2008 by C.-C. Chan

  11. Related Technologies • Database Systems • MS SQL server • Transaction databases • OLAP (Data Cubes) • Data Mining • Decision Trees • Clustering Tools • Machine Learning/Data Mining Systems • CART (Classification And Regression Trees) • C 5.x (Decision Trees) • WEKA (Waikato Environment for Knowledge Analysis) • LERS • ROSE 2 • Rule-Based Expert System Development Environments • CLIPS, JESS • EXSYS • Web-based Platforms • Java • MS .Net UA Faculty Forum 2008 by C.-C. Chan

  12. Comparisons UA Faculty Forum 2008 by C.-C. Chan

  13. Rule-Based Data Mining System Objectives • Develop an integrated rule-based data mining system provides • Synergy of database systems, machine learning, and expert systems • Dealing with uncertain rules • Delivery of web-based user interface UA Faculty Forum 2008 by C.-C. Chan

  14. Structure of Rule-Based Systems UA Faculty Forum 2008 by C.-C. Chan

  15. System Workflow Input Data Set User Interface Generator Data Pre-processing Rule Generator UA Faculty Forum 2008 by C.-C. Chan

  16. Input Data Set: Text file with comma separated values (CSV) It is assumed that there are N columns of values corresponding to N variables or parameters, which may be real or symbolic values. The first N – 1 variables are considered as inputs and the last one is the output variable. Data Preprocessing: Discretize domains of real variables into a finite number of intervals Discretized data file is then used to generate an attribute information file and a training data file. Rule Generator: A symbolic learning program called BLEM2 is used to generate rules with uncertainty User Interface Generator: Generate a web-based rule-based system from a rule file and corresponding attribute file UA Faculty Forum 2008 by C.-C. Chan

  17. Client Middle Tier SQL DB server Requests Responses Rule Table Definition SQL Rule Table Architecture of RBC generator Workflow of RBC generator Rule set File Metadata File RBC Generator UA Faculty Forum 2008 by C.-C. Chan

  18. Concluding Remarks A system for generating rule-based classifier from data with the following benefits: • No need of end user programming • Automatic rule-based system creation • Delivery system is web-based provides easy access UA Faculty Forum 2008 by C.-C. Chan

  19. Project Status The current version 1.4 of our system provides fundamental features for data mining from data including: • Data Preprocessing • Management of preprocessed data files • Machine Learning tool to generate rules from data • Rule-Based Classifier system supporting uncertain rules • Web-Based access UA Faculty Forum 2008 by C.-C. Chan

  20. Future Work • More advanced features in Data Preprocessing such as data cleansing, data transformation, and data statistics • Learning from multi-criteria inputs with preferential rankings to support Multiple Criteria Decision Making processes • Concept-Oriented information retrieval and search UA Faculty Forum 2008 by C.-C. Chan

  21. Thank You! UA Faculty Forum 2008 by C.-C. Chan

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