Error message

  • Notice: Undefined variable: _SESSION in tracking_init() (line 27 of C:\xampp\htdocs\rsds\sites\all\modules\rsds\tracking\tracking.module).
  • Warning: file_get_contents(http://user-agent-string.info/rpc/get_data.php?key=free&format=ini&ver=y): failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found in UASparser->get_contents() (line 247 of C:\xampp\htdocs\rsds\sites\all\modules\rsds\tracking\UASparser\UASparser.php).
  • Warning: file_get_contents(http://user-agent-string.info/rpc/get_data.php?key=free&format=ini): failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found in UASparser->get_contents() (line 247 of C:\xampp\htdocs\rsds\sites\all\modules\rsds\tracking\UASparser\UASparser.php).

SOFTWARE

Browse software:
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Grobian
School of Information and Software Engineering, University of Ulster, Newton-abbey, IRELAND
FB Psychologie/Methodenlehre, Universitat Osnabruck, Osnabruck, GERMANY


Abstract

GROBIAN is an implementation of the rough information analysis ROUGHAIN described in [2]. The acronym GROBIAN comes from the German “GROBmengen Informations ANalyse”, which is the some as “ROUGH set Information ANalysis - and the meaning of the German GROBIAN and the English ROUGHIAN is (roughly) the same. GROBIAN is bilingual (English/German). Beside the standard procedures of Rough Set Data Analysis, such as reduct analysis gamma and alpha - statistics and rule generation, GROBIAN has the following enhanced features:
  • A randomization test for rule significance including a sequential testing procedure,
  • A simple method for data filtering which may increase the significance of rules,
  • Model selection based on information theoretic entropy,
  • Jack-knife vlidation,
  • Training/Testing validation.
A menu driven recording and restriction procedure for data manipulation is an additional feature of GROBIAN.

Developers
  1. Main developer: Günther Gediga, FB Psychologie and Institut für semantische Informationsverarbeitung, Universität Osnabrück, ggediga@Luce.psycho.uni-osnabrueck.de
  2. Ivo Düntsch, Faculty of Informatics, University of Ulster, I.Duentsch@ulst.ac.uk
History
  • V 0.01-0.06 Versions for internal use only,
  • V 0.07 First published GROBIAN version, including significance testing, rough filtering, rough entropy (July 1996),
  • V 0.08-0.13 Several minor changes and bug removal,
  • V 0.14 Removed the RSL-library from most parts of GROBIAN,
  • V 0.15 Added JACK-KNIFE validation procedure,
  • V 0.16 Added batch processing from a list reducts,
  • V 0.17 Sequential Randomization Test as now available for significance testing. Added TRAINING SET-TESTING SET validation procedure,
  • V 0.18 Result windows can handled as objects (Oct 1997).
Input

One table which may be portioned by data restrictions to enable many tables-applications. ASCII-files, RSL-SYS-files and specific GROBIAN files are possible input formats. There is no direct interaction with DBMS system (except via ASCII export-import).

Output

The result of the chosen procedure on screen and as an ASCII file.

System requirements
  • Processor: Intel 80386 or later,
  • MS Windows family (3.1, Win95, NT),
  • >= 12 mb RAM,
  • >= 10 mb disk space,
Evaluation criteria applied by the system
  • Approximation quality gamma,
  • Statistical significance of gamma,
  • Drop of gamma,
  • Statistical significance of drop gamma,
  • Jack-knifed predicted success (lower bound and expectation),
  • Training-testing set prediction success (lower bound and expectation)
  • Information analysis (standard and rough information),
  • Statistical significance of information measures.
Differences of other systems

Emphasis on non-invasive data filtering and statistical validation of e-reducts of information system.