A New Method of Fuzzy Risk in Studying Landfall Typhoon

We can obtain a conservative risk value, a venture risk value and a maximum probability risk value. Under such an level, three risk values can be calculated. As adopts all values throughout the set [0, 1], it is possible to obtain a series of risk values. Therefore, the fuzzy risk can be a multi-valued risk or set-valued risk. Calculation of the fuzzy expected value of landfall typhoon risk in Zhejiang province has been performed based on the interior-outer set model. Selection of an value depends on the confidence in different groups of people, while selection of a conservative risk value or venture risk value depends on the risk preference of these people. Keywords— level; fuzzy risk; fuzzy expected value; landfall typhoon