Data Mining in Dynamic Information System Based on Rough Set
Under the dynamic information system model,adapts mines rules in the change of time and scene.In the condition of fixed universe,introduces the concept of differential information system and constructing process.Based on these,proposes a heuristic rules mining algo-rithm and analyses its complexity.Such decision rules,gotten from the algorithm,reflect the inner relation between the change of condition attribute values and the trend of decision-making.