The indetermination of direction relation is a hot topic for fuzzy GIS researchers. The existing models only study the effects of indetermination of spatial objects,but ignore the uncertainty of direction reference fr...The indetermination of direction relation is a hot topic for fuzzy GIS researchers. The existing models only study the effects of indetermination of spatial objects,but ignore the uncertainty of direction reference framework. In this paper,first a for-malized representation model of indeterminate spatial objects is designed based on quadruple (x,y,A,μ),then a fuzzy direction reference framework is constructed by revising the cone method,in which the partitions of direction tiles are smooth and continuous,and two neighboring sections are overlapped in the transitional zones with fuzzy method. Grounded on these,a fuzzy description model for indeterminate direction relation is proposed in which the uncertainty of all three parts (source object,reference object and reference frame) is taken into account simultaneously. In the end,case studies are implemented to test the rationality and validity of the model.展开更多
This article introduces briefly the development, the struCture and the running situation of a Jinlin flood disaster forecasting ES.In the field of meteorological phenomena,there is a lot of fuzzy phenomena,and concept...This article introduces briefly the development, the struCture and the running situation of a Jinlin flood disaster forecasting ES.In the field of meteorological phenomena,there is a lot of fuzzy phenomena,and concept posseSSing fuzziness. For this reason,we developed FBEST by fuzzy method.The application of FBEST will have great significance in preventing and decreasing disaster,protecting peoples lives and property.展开更多
基金the National Natural Science Foundation of China (Grant Nos. 40701143, 40701145 and 40571127)
文摘The indetermination of direction relation is a hot topic for fuzzy GIS researchers. The existing models only study the effects of indetermination of spatial objects,but ignore the uncertainty of direction reference framework. In this paper,first a for-malized representation model of indeterminate spatial objects is designed based on quadruple (x,y,A,μ),then a fuzzy direction reference framework is constructed by revising the cone method,in which the partitions of direction tiles are smooth and continuous,and two neighboring sections are overlapped in the transitional zones with fuzzy method. Grounded on these,a fuzzy description model for indeterminate direction relation is proposed in which the uncertainty of all three parts (source object,reference object and reference frame) is taken into account simultaneously. In the end,case studies are implemented to test the rationality and validity of the model.
文摘This article introduces briefly the development, the struCture and the running situation of a Jinlin flood disaster forecasting ES.In the field of meteorological phenomena,there is a lot of fuzzy phenomena,and concept posseSSing fuzziness. For this reason,we developed FBEST by fuzzy method.The application of FBEST will have great significance in preventing and decreasing disaster,protecting peoples lives and property.
