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通过对代数次数增加情况的分析，研究了type-1广义Feistel结构下，单SP(substitution-permutation)模型与双SP模型抵抗高阶差分分析的能力。结合高阶积分与高阶差分思想，开发了四路type-1广义Feistel-SP与Feistel-SPSP结构代数次数上界估计的新方法。利用这一方法，分别构造了这2种结构在2种常用参数下的区分器。结果显示，四路type-1广义Feis...
Classification of poset-block spaces admitting MacWilliams-type identity
Classification poset-block spaces admitting MacWilliams-type identity
2012/3/1
In this work we prove that a poset-block space admits a MacWilliams-type identity if and only if the poset is hierarchical and at any level of the poset, all the blocks have the same dimension. When t...
Periodic Solutions and Global Asymptotic Stability of a Delayed Discrete Predator-Prey System with Holling II Type Functional Response
Coincidence degree discrete predator-prey system global asymptotic stability positive periodic solutions
2007/8/7
In this paper, we study the existence and global asymptotic stability of positive periodic solutions of a delayed periodic predator-prey system with Holling II type functional response. By use of the ...
A method for obtaining the explicit pointwise bounds on solutions to the general form of linear systems of Volterra integral inequalities in n independent variables is recomended. All known results re...