A knowledge discovery method: APL implementation and application

  • Authors:
  • Alexander O. Skomorokhov

  • Affiliations:
  • Institute of Nuclear Power Engineering, Obninsk-5 / Kaluga Region, Russia

  • Venue:
  • APL '00 Proceedings of the international conference on APL-Berlin-2000 conference
  • Year:
  • 2000

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Abstract

The paper concentrates on one direction of Knowledge Discovery in Data Bases and Data Mining, known as automatic rule extraction from data sets.The rule extraction algorithm has been implemented in Dyalog APL. The paper presents APL functions and tests made on artificial data sets.The real life problem solution is described as an application of implemented APL code. The problem is to find automatically rules to describe the corrosion rate of steel in sodium as a function of alloy additions. The input data are experimental data of corrosion rate measured for different steel samples. The output is a set of IF-THEN rules, which describe the dependence of corrosion rate on alloy additions. An expert in corrosion has validated the rules and an example of real "discovery" has been mentioned.