Title :
Algorithms and algorithm analysis of logical difference operation of variable precision upper approximation operator and grade lower approximation operator
Author_Institution :
Coll. of Math. & Software Sci., Sichuan Normal Univ., Chengdu, China
Abstract :
The aim of this contribution is to construct new operation of approximation operators, and explore its calculation. It proposes logical difference operation of variable precision upper approximation operator and grade lower approximation operator. Then regular algorithm and structural algorithm are proposed and analyzed, and furthermore it obtains an important conclusion that structural algorithm has advantages in space complexity. Finally the new operation and its algorithms are illustrated by a medical example.
Keywords :
approximation theory; rough set theory; algorithm analysis; grade lower approximation operator; logical difference operation; regular algorithm; rough set theory; structural algorithm; variable precision upper approximation operator; Algorithm design and analysis; Approximation algorithms; Educational institutions; Humans; Mathematics; Probabilistic logic; Quantization; Set theory; Software algorithms; Technological innovation; approximation operator; graded rough set; logical operation; rough set theory; structural algorithm; variable precision rough set;
Conference_Titel :
Networking and Digital Society (ICNDS), 2010 2nd International Conference on
Conference_Location :
Wenzhou
Print_ISBN :
978-1-4244-5162-3
DOI :
10.1109/ICNDS.2010.5479358
