Mathematical Expectation About Discrete Random Variable With Interval Probability(DRVIP) or Fuzzy Probability(DRVFP)
-
摘要: 研究离散型区间概率随机变量和离散型第二类模糊概率随机变量数学期望的性质及求解方法．利用模糊分解定理，把求模糊概率随机变量的数学期望问题化为求一系列区间概率随机变量的数学期望．求区间概率随机变量的数学期望是一个典型的线性规划问题，用单纯形方法推导了求区间概率随机变量数学期望的一个很实用的计算公式．算例表明，用该计算公式得到的结果和用数学规划方法得到的结果完全吻合，但计算过程相对简单．Abstract: The character and an algorithm about DRVIP(discrete randam variable with interval probability) and the second kind DRVFP (discrete random variable with crisp event-fuzzy probability) are researched. Using the fuzzy resolution theorem, the solving mathematical expectation of a DRVFP can be translated into solving mathematical expectation of a series of RVIP. It is obvious that solving mathematical expectation of a DRVIP is typically solving a linear programming problem. A very functional calculating formula solving mathematical expectation of DRVIP was obtained by using the Dantzig's simplex method. The example indicates that the result obtained by using the functional calculate formula fits together completely with the result obtained by using the linear programming method, but the process using the formula deduced is simpler.
-
Key words:
- interval number /
- fuzzy set /
- probability /
- random variable /
- mathematical expectation
-
[1] 吕恩琳，钟佑明.模糊密度随机变量的数学描述[J].应用数学和力学，2000,21(8):861—869. [2] 吕恩琳，钟佑明.模糊概率随机变量[J].应用数学和力学，2003,24(4):434—440. [3] Dubois D, Prade H.Fuzzy Sets and System: Theory and Applications[M].New York: Academic Press,1980. [4] 钟佑明，吕恩琳，王应芳.区间概率随机变量及其数字特征[J].重庆大学学报，2001,24(1):24—27. [5] 武小悦,沙基昌.具有Fuzzy概率的Fuzzy可靠性问题的求解途径[J].模糊系统与数学,1997,11(3):8—11. [6] 崔玉玲,李延杰.清晰事件模糊概率（CF型）模糊可靠性研究[J].系统工程理论与实践，1991，11（6）：41—45. [7] 王明文.基于概率区间的Bayes决策方法[J].系统工程理论与实践,1997,17(11):79—80. [8] 肖盛燮，王平义，吕恩琳.模糊数学在土木与水利工程中的应用[M].北京：人民交通出版社，2004. -
点击查看大图
计量
- 文章访问数: 2586
- HTML全文浏览量: 98
- PDF下载量: 1528
- 被引次数: 0
下载:
