Discussion of some conceptions of a water mass based on the theory of fuzzy sets |
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Authors: | Li Fengqi Su Yusong Wang Fengqin Yu Zuxiang |
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Institution: | (1) Shandong College of Oceanology, Qingdao |
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Abstract: | The fundamental principle for differentiating water masses is a strict consideration of their “relative interier homogeneity”
and obvious exterior differences with others in characteristics. The conceptions of water type, water mass and water system
are dealt with on the basis of the theory of fuzzy sets. A proposal to apply the theory of fuzzy sets to define the water
mass and its core, independent area, boundary and mixing area is put forward.
As an example, the membership function of the surface water masses in the Yellow Sea and East China Sea in August, 1979, are
considered. Their cores, independent areas, boundaries, mixing areas and the approximation degrees between different water
masses are calculated respectively. The water masses are ranged according to their fuzzy degrees.
This paper was published inOceanologia et Limnologia Sinica, 1986,17(2): 102–110.
This study was financially supported by National Natural Sciences Foundation of China. |
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