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正互反判断矩阵元素与优先权重新的逻辑关系 总被引:3,自引:1,他引:2
揭示了一种含参数的正互反判断矩阵元素与优先权重新的逻辑关系,并对参数的含义作了解释.得出了四个重要结论.通过算例与Saaty提出的层次分析法做了比较,说明了该方法的合理、科学性. 相似文献
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衡量互反矩阵一致性的一种新指标 总被引:1,自引:0,他引:1
本文针对AHP中利用几何平均值来估计各因素权向量的方法提出了与之匹配的一种新的衡量互反矩阵一致性的指标,并且制定了相应的衡量标准,同时将其与利用最大特征值所建立的指标入标准进行了比较与讨论。 相似文献
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研究矩阵元素为Fuzzy数的互反判断矩阵的传递性质.首先得到了判断两个Fuzzy数近似相等的等价条件,并得到了揭示Fuzzy数的核之间关系的一个充要条件.在此基础上,进一步证明了一致性互反Fuzzy判断矩阵具有传递性的两个结论.这两个结论说明:在层次分析法中,用一致性互反Fuzzy判断矩阵表示一组方案在同一目标下的两两重要性比较是符合理性决策的思维特征的. 相似文献
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正定矩阵的Hadamard乘积的一个矩阵不等式的精细 总被引:1,自引:1,他引:0
周知的正定矩阵A和B的Hadamard乘积矩阵不等式 :(A B) -1 ≤A-1 B-1 被精细为(A B) -1 ≤diag((A-1 (α) -1 B(α) ) -1 ,(A(α′) B-1 (α′) -1 ) -1 ) ,≤diag(A-1 (α) B(α) -1 ,A(α′) -1 B-1 (α′) )≤A-1 B-1 ,这里A(α)是A的主子矩阵且α′是α的补序列 ;同时给出了这些不等式的等式成立的充分必要条件 相似文献
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对文 [1 ]的主要结论作了说明 ,给出 Hadamard乘积矩阵有关性质的更一般的结果 . 相似文献
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利用分块矩阵的方法得到了关于半正定矩阵M-P逆的H adam ard积的几个偏序不等式,推广了某些已知的不等式. 相似文献
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Vivian Kuperberg 《组合设计杂志》2016,24(9):393-405
We use modular symmetric designs to study the existence of Hadamard matrices modulo certain primes. We solve the 7‐modular and 11‐modular versions of the Hadamard conjecture for all but a finite number of cases. In doing so, we state a conjectural sufficient condition for the existence of a p‐modular Hadamard matrix for all but finitely many cases. When 2 is a primitive root of a prime p, we conditionally solve this conjecture and therefore the p‐modular version of the Hadamard conjecture for all but finitely many cases when , and prove a weaker result for . Finally, we look at constraints on the existence of m‐modular Hadamard matrices when the size of the matrix is small compared to m. 相似文献
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研究了属性值以区间数表示的群决策问题,提出了区间数决策向量转化为互反判断矩阵的公式,定义了区间数互反判断矩阵几何加权集成算子.在此基础上,提出了区间数多属性群决策的新方法.方法首先针对每一个属性,将各决策者、各方案对应此属性的区间数向量转换为互反判断矩阵,由新定义的集成算子进行集成.由集成区间数矩阵的上界、下界矩阵计算各方案关于此属性的排序向量.由属性权重、可能度和排序公式对方案进行排序.最后给出一个实例进行分析,结果表明了此方法的实用性和可行性. 相似文献
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W. Plesken 《Algebras and Representation Theory》2000,3(4):385-395
Automorphism groups of Hadamard matrices are investigated from the point of view of integral representation theory. Interesting examples involving the Mathieu groups M
12 and M
24 and the Leech lattice are dicussed. 相似文献
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A characterization of ‐cocyclic Hadamard matrices is described, depending on the notions of distributions, ingredients, and recipes. In particular, these notions lead to the establishment of some bounds on the number and distribution of 2‐coboundaries over to use and the way in which they have to be combined in order to obtain a ‐cocyclic Hadamard matrix. Exhaustive searches have been performed, so that the table in p. 132 in A. Baliga, K. J. Horadam, Australas. J. Combin., 11 (1995), 123–134 is corrected and completed. Furthermore, we identify four different operations on the set of coboundaries defining ‐cocyclic matrices, which preserve orthogonality. We split the set of Hadamard matrices into disjoint orbits, define representatives for them, and take advantage of this fact to compute them in an easier way than the usual purely exhaustive way, in terms of diagrams. Let be the set of cocyclic Hadamard matrices over having a symmetric diagram. We also prove that the set of Williamson‐type matrices is a subset of of size . 相似文献
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Hiroshi Kimura 《Designs, Codes and Cryptography》1996,9(1):71-77
Let D
2p
be a dihedral group of order 2p, where p is an odd integer. Let ZD
2p
be the group ring of D
2p
over the ring Z of integers. We identify elements of ZD
2p
and their matrices of the regular representation of ZD
2p
. Recently we characterized the Hadamard matrices of order 28 ([6] and [7]). There are exactly 487 Hadamard matrices of order 28, up to equivalence. In these matrices there exist matrices with some interesting properties. That is, these are constructed by elements of ZD
6. We discuss relation of ZD
2p
and Hadamard matrices of order n=8p+4, and give some examples of Hadamard matrices constructed by dihedral groups. 相似文献
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We discuss new constructions of Hadamard and conference matrices using relative difference sets. We present the first example of a relative
-difference set where n – 1 is not a prime power. 相似文献
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We construct Hadamard matrices of orders and , and skew‐Hadamard matrices of orders and . As far as we know, such matrices have not been constructed previously. The constructions use the Goethals–Seidel array, suitable supplementary difference sets on a cyclic group and a new efficient matching algorithm based on hashing techniques. 相似文献
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Two Hadamard matrices are considered equivalent if one is obtained from the other by a sequence of operations involving row or column permutations or negations. We complete the classification of Hadamard matrices of order 32. It turns out that there are exactly 13,710,027 such matrices up to equivalence. 相似文献