%0 Journal Article %A Chen-Yuan Chen and Wan-I Lee and Yi-Chaio Sui and Cheng-Wu Chen %D 2010 %J International Journal of Marine and Environmental Sciences %B World Academy of Science, Engineering and Technology %I Open Science Index 48, 2010 %T Applying Half-Circle Fuzzy Numbers to Control System: A Preliminary Study on Development of Intelligent System on Marine Environment and Engineering %U https://publications.waset.org/pdf/11354 %V 48 %X This study focuses on the development of triangular fuzzy numbers, the revising of triangular fuzzy numbers, and the constructing of a HCFN (half-circle fuzzy number) model which can be utilized to perform more plural operations. They are further transformed for trigonometric functions and polar coordinates. From half-circle fuzzy numbers we can conceive cylindrical fuzzy numbers, which work better in algebraic operations. An example of fuzzy control is given in a simulation to show the applicability of the proposed half-circle fuzzy numbers. %P 1980 - 1984