ALGORITHMS AND ALGORITHM ANALYSIS OF LOGICAL OR OPERATION OF VARIABLE PRECISION LOWER APPROXIMATION OPERATOR AND GRADE UPPER APPROXIMATION OPERATOR

摘要

This paper is to construct new operation of approximation operators, and explore its calculation. First it proposes logical OR operation of variable precision lower approximation operator and grade upper approximation operator. Macroscopic algorithm and microscopic algorithm are proposed and analyzed, and furthermore it obtains a conclusion that microscopic algorithm has advantages in space complexity. Finally a medical example is given to illustrate the new operation and its algorithms.