Author(s): Wang Xia, Tian Liang
Pages: 11-15
Year: 2015 Issue:  5
Journal: Electric Power Science and Engineering
Keyword:  evidence theory; typical sample; probability density; belief function;
Abstract: The value of D-S evidence theory of belief function assignment is the key to get accurate fusion results, while traditional methods, such as the belief function assignment got through the usage of the membership function and the normal distribution, tend to be more subjective.In order to make the belief function assignment more ob-jective.This paper puts forward a method constructing belief function assignment after combining other methods and analyzing the typical samples.First, samples were collected for each target mode, and which probability distribu-tions the evidence of each mode obeys was judged.Then, the probability density of each piece of evidence was cal-culated by using corresponding probability formula.Finally, normalized processing was carried on, and the union rule was used to obtain the fusion results.The example shows that using this method can get more accurate results of fusion, and this method can not only improves the accuracy of the result of discrimination, but also reduce the uncertainty.In addition, it proves that the fusion diagnosis has a higher reliability than a single data.