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1.
不确定性量化法与不确定性决策   总被引:8,自引:1,他引:7  
以不确定性信息的数学处理理论即不确定性数学理论为基础 ,阐述了专家意见的不确定性量化法 ,进而创立了不确定性决策模型 .最后通过举例 ,详细地演示了不确定性决策模型的建立过程 .  相似文献
2.
Training Multilayer Perceptrons Via Minimization of Sum of Ridge Functions   总被引:5,自引:0,他引:5  
Motivated by the problem of training multilayer perceptrons in neural networks, we consider the problem of minimizing E(x)= i=1 n f i ( i x), where i R s , 1in, and each f i ( i x) is a ridge function. We show that when n is small the problem of minimizing E can be treated as one of minimizing univariate functions, and we use the gradient algorithms for minimizing E when n is moderately large. For large n, we present the online gradient algorithms and especially show the monotonicity and weak convergence of the algorithms.  相似文献
3.
一种基于Yager熵最大化属性权重组合方法   总被引:2,自引:0,他引:2  
研究了区间型多属性决策中属性权重组合问题.首先,提出了一种客观权重确定方法--平均差极大化方法;其次,基于区间型理想点和熵极大化原理,提出属性权重的组合模型.然后,利用属性的组合权重和投影模型,对方案进行排序.最后,通过算例说明了该方法的可行性和有效性.  相似文献
4.
Acceptance sampling has been one of practical tools for quality assurance applications, which provide a general rule to the producer and the consumer for product acceptance determination. It has been shown that variables sampling plans requires less sampling compared with attributes sampling plans. Thus, variables sampling plans become more attractive and desirable especially when the required quality level is very high or the allowable fraction non-conforming is very small. This paper attempts to develop an efficient and economic sampling scheme, variables repetitive group sampling plan, by incorporating the concept of Taguchi loss function. The OC curve of the proposed plan is derived based on the exact sampling distribution and the plan parameters are determined by minimizing the average sample number with two constraints specified by the producer and the consumer. The efficiency of the proposed variables RGS is examined and also compared with the existing variables single sampling plan in terms of the sample size required for inspection. In addition, tables of the plan parameters for various combinations of entry parameters are provided and an example is presented for illustration.  相似文献
5.
模糊诊断模型   总被引:1,自引:0,他引:1  
探讨了一个基于模糊关系方程的诊断模型 ,在本文的诊断模型中 ,加入了时间参数 ,给出了故障的征兆集和观察到的征兆集之间的一致性、相关性、覆盖性以及相等性的量化指标 ,用这些量化指标可以保证在知识不完备的情况下既不遗漏某一潜在的故障 ,又能得到与已知征兆集最佳匹配的解 .同时 ,讨论了诊断问题中知识的充分性、完备性及其关系 .  相似文献
6.
基于可拓集合的动态分类及其UML表示方法研究   总被引:1,自引:0,他引:1  
可拓集合是分析事物的可变性和多变性的理论基础 .本文首先建立了物元与类之间的联系 ,在可拓集合零界的基础上建立了过渡类 ,为了形式化描述出多值分类 ,对关联函数进行约束 ,并利用可拓域与物元变换探讨了动态分类机制 ,最后采用 UML构造型扩展机制对动态分类的表示问题进行初步的研究 .  相似文献
7.
A smoothing-type algorithm for solving system of inequalities   总被引:1,自引:0,他引:1  
In this paper we consider system of inequalities. By constructing a new smoothing function, the problem is approximated via a family of parameterized smooth equations. A Newton-type algorithm is applied to solve iteratively the smooth equations so that a solution of the problem concerned is found. We show that the algorithm is globally and locally quadratically convergent under suitable assumptions. Preliminary numerical results are reported.  相似文献
8.
We give necessary and sufficient conditions for the linearity of multiple regression on a general stable vector, along with a sufficient condition for the finiteness of the conditional absolute moment when 0 < α ≤ 1.  相似文献
9.
We present an operator space version of Rieffel's theorem on the agreement of the metric topology, on a subset of the Banach space dual of a normed space, from a seminorm with the weak*-topology. As an application we obtain a necessary and sufficient condition for the matrix metric from an unbounded Fredholm module to give the BW-topology on the matrix state space of the -algebra. Motivated by recent results we formulate a non-commutative Lipschitz seminorm on a matrix order unit space and characterize those matrix Lipschitz seminorms whose matrix metric topology coincides with the BW-topology on the matrix state space.

  相似文献

10.
The authors discuss the relation of the oscillation of the following two difference equations,
where m ≥ 2, τ : NN, N isthe set of integers, |n − τ(n)| ≤ Mfor n N0, M is a positive integer, is nondecreasing in x, xf(n, x)> 0, as x ≠ 0. Wewill show some relations of the oscillation of the above two equations. Especially, for m to be even, we establish the equivalenceof the oscillation of the above two difference equations.  相似文献
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