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131.
阐述了基本RM型对称函数的定义和性质,给出了任意”变量对称函数在n-1变量基本RM型对称函数完备集中展开系数的计算公式,在此基础上,提出了基于RM型三变量通用逻辑门ULM3的变量数为奇数或偶数的对称函数综合方法,实例验证了上述方法的有效性. 相似文献
132.
The network trophic theory tries to explain the working of basic ecosystems by studying the trophic connections between species. A basic model that helps us to understand some rules that have been followed in the ecosystems is the one known as the model of trophic cascade. By following these ecological criteria, the algorithm that we present allows us to determine the number of viable trophic networks, taking into account the number of trophic levels, the maximum number of species at each level and the links between the different species. A development for five levels is shown. 相似文献
133.
Fred Richman 《Mathematical Logic Quarterly》2009,55(1):31-36
We consider notions of boundedness of subsets of the natural numbers ? that occur when doing mathematics in the context of intuitionistic logic. We obtain a new characterization of the notion of a pseudobounded subset and we formulate the closely related notion of a detachably finite subset. We establish metric equivalents for a subset of ? to be detachably finite and to satisfy the ascending chain condition. Following Ishihara, we spell out the relationship between detachable finiteness and sequential continuity. Most of the results do not require countable choice. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献
134.
135.
The axioms of iteration 2-theories capture, up to isomorphism, the equational properties of iteration in conjunction with horizontal and vertical composition in all algebraically complete categories. We give a concrete representation of the free iteration 2-theory generated by a 2-signature. 相似文献
136.
R. Kheradmand M. Sahrai H. Tajalli G. Tissoni L. A. Lugiato 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》2008,47(1):107-112
We present here a method for selecting optical patterns in a passive
semiconductor microresonator, by using a spatial perturbation. A pattern is
spontaneously generated in the system, and a switching beam causes this
pattern to rotate even if the power in the switching beam is much lower than
the power in the pattern. Thus, an all optical switch is realized, that
operates at low light levels. 相似文献
137.
M. Caymax M. Houssa G. Pourtois F. Bellenger K. Martens A. Delabie S. Van Elshocht 《Applied Surface Science》2008,254(19):6094-6099
Important progress has been made in the passivation of Ge/gate dielectric interfaces. One important approach is by thermally oxidized GeO2 interface and ALD high-k layers, with an interface state density Dit ∼ 2 × 1011 cm−2 eV−1. Another approach is with an epi-Si/SiO2 interface, resulting in similar Dit. Hysteresis and Vth shift, however, are still not optimal. Extensive material characterization and theoretical insights help us understanding the root cause of these remaining issues and show the way to improved interface control. 相似文献
138.
刘红兵 《数学的实践与认识》2001,31(5):556-559
定义了增加转化词的概念 ,说明了它的研究对象及在消除决策错误中的作用 ,研究了在消错逻辑变换中 ,这个转化词所具有的性质和规律 . 相似文献
139.
1IntroductionAconsiderableresearcheforthasbeenmadeduringthepastfewyearstodevelopopticallogicoperationsbasedonphotorefractivem... 相似文献
140.
B. d'Espagnat 《Journal of statistical physics》1989,56(5-6):747-766
Although it rests on strongly established proofs, the statement that no realistically interpretable local theory is compatible with some experimentally testable predictions of quantum mechanics seems at first sight to be incompatible with a few general ideas and clear-cut statements occurring in recent theoretical work by Griffiths, Omnès, and Ballentine and Jarrett. It is shown here that in fact none of the developments due to these authors can be considered as a realistically interpretable local theory, so that there is no valid reason for suspecting that the existing proofs of the statement in question are all flawed. 相似文献