排序方式: 共有64条查询结果,搜索用时 15 毫秒
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运用二分法,结合实系数多项式零点的界定理及Sturm定理,给出了一个求解一元实系数多项式方程全部实根的实用数值方法. 相似文献
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We illustrate the dichotomy of classical/quantum correlations by virtue of monogamy. More precisely, we show that correlations in a bipartite state are classical if and only it each party ot the state can be perfectly correlated with other ancillary systems. In particular, this means that if there are quantum correlations between two parties, then the classical (as well as quantum) correlating capabilities of the two parties with other systems have to be strictly reduced. 相似文献
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基于单频2D-Gabor滤波器的虹膜识别算法研究 总被引:1,自引:0,他引:1
针对2D-Gabor滤波器设计的问题,提出了一种单频2D-Gabor滤波器设计方法。该方法在详细分析了2D-Gabor滤波器中各个参数意义的基础上,通过二分法的思想确定适合虹膜纹理的单一频率ω,再根据其它参数与其关系确定出各个参数取值,从而获得单一频率下的2D-Gabor滤波器。实验结果表明使用设计的单频2D-Gabor滤波器对虹膜图像进行特征提取可以使虹膜识别的识别率达到98.61%以上。使用单频2D-Gabor滤波器不仅可以提高特征提取速度,降低存储空间,同时也利于硬件实现。 相似文献
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1"问题解决"的含义关于"问题解决",主要有三种不同的理解:第一种理解把"问题解决"看成是一种教学手段,这是把"问题解决"从属于具体数学知识的教学,把"问题解决"当作一种背景,即通过问题来引入有关的教学内容,并通过问题解决来达到复习、巩固及检查的目的.第二种理解把"问题解决"看成是一种技 相似文献
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Gao Feng Zheng 《数学学报(英文版)》2012,28(7):1491-1506
It is shown that any solution to the semilinear problem{ ut = uxx + δ(1-u)-p , (x, t) ∈ (-1 , 1) × (0 , T ), u( ±1 , t) = 0, t ∈ (0 , T ), u(x, 0) = u0(x) 1, x ∈ [ 1 , 1] either touches 1 in finite time or converges smoothly to a steady state as t →∞. Some extensions of this result to higher dimensions are also discussed. 相似文献
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利用指数二分法及不动点定理,研究了一类具有反射变元的中立型泛函微分方程的有界解和概周期解的存在性. 相似文献
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ZHU Huan-ran 《数学季刊》2004,19(2):164-171
By using exponential dichotomies and Liapunov function method, we have studied the existence of almost periodic solutions on a Lienard system and have obtained some simple sufficient condition. 相似文献