共查询到16条相似文献,搜索用时 50 毫秒
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二部竞赛矩阵的谱半径 总被引:1,自引:0,他引:1
令Γm,n表示所有的不可约m×n二部竞赛矩阵。对于M∈Γm,n,ρ(M)=ρ表示M的谱半径,sc=msc1sc1,ωn=min{ρ(M):M∈Γn,n}。本文主要获得了下述结论:是M的得份向量,s=sc2nsc2(1)如果s′s 54mn+5mn-8s′s/mn。8m2n2,则ρ(M) 1(2)ρ3-(m+n-1)mn2(m+n)ρ-2m2n2-s′s2(m+n)ρ2+mn4(m+n)mn 0。(3)当n 3时,有1.3709<ωn<2.34。 相似文献
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在对仿真的多径信道的水听器接收信号作倒谱处理获得时延谱结构的基础上,研究了对接收信号的倒谱与拷贝场的倒谱作匹配处理以求达到目标的被动定位的方法。 相似文献
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本文将改进的Gauss-Seidel迭代法应用于一类有很强应用背景的矩阵-H-矩阵及其比较矩阵,在较目前参考文献更一般的分裂条件下,得到相应的收敛结果及谱半径的比较结果,进而比较了其收敛速度的大小。所用方法不同于以往有关结论,并改进了目前已有相关结论。 相似文献
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导出匹配可扩二部图度和条件的改进 总被引:2,自引:2,他引:0
研究并改进了导出匹配可扩二部图的度和条件.主要结论如下:若图G是一个有二部划分(A,B)的二部图,且|A|=|B|=n=3k+1(k≥2),如果对图G中任意不相邻的顶点u和v,有d(u)+d(v)≥4k+1,那么图G是导出匹配可扩的,并且该结果是最佳可能的. 相似文献
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A. C. Lobstein V. A. Zinoviev 《Applicable Algebra in Engineering, Communication and Computing》1997,8(5):415-420
We present a new construction of binary nonlinear perfect codes with minimum distance 3 and lowerbound the number of nonequivalent
such codes.
Received: November 26, 1996; revised version: March 14, 1997 相似文献
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I. Honkala T. Laihonen S. Litsyn 《Applicable Algebra in Engineering, Communication and Computing》1997,8(5):395-401
We derive a new upper bound on the covering radius of a code as a function of its dual distance. This bound improves on the
Honkala-Litsyn-Tiet?v?inen bound and in a certain interval it is also better than Tiet?v?inen’s bound. Upper bounds on even-weight
codes are considered as well.
Received: November 4, 1996; revised version: February 1, 1997 相似文献
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The objective of this paper is to obtain the spectrum of light-emitting diode (LED)-based jaundice photodynamic therapy device (JPTD), the bilirubin absorption spectrum in vivo was regarded as target spectrum. According to the spectral constructing theory, a simple genetic algorithm as the spectral matching algorithm was first proposed in this study. The optimal combination ratios of LEDs were obtained, and the required LEDs number was then calculated. Meanwhile, the algorithm was compared with the existing spectral matching algorithms. The results show that this algorithm runs faster with higher efficiency, the switching time consumed is 2.06?s, and the fitting spectrum is very similar to the target spectrum with 98.15% matching degree. Thus, blue LED-based JPTD can replace traditional blue fluorescent tube, the spectral matching technology that has been put forward can be applied to the light source spectral matching for jaundice photodynamic therapy and other medical phototherapy. 相似文献
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ID-临界因子图的度和条件 总被引:1,自引:0,他引:1
本文研究ID-因子临界图的度和条件,得到使得图G是ID-因子临界图的任意两个不相邻的顶点的度和的下界,同时说明这些结果是最好可能的。 相似文献