排序方式: 共有11条查询结果,搜索用时 125 毫秒
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矩阵算子范数和矩阵酉不变范数是两大类矩阵范数。它们既有区别又有联系。本文首先讨论了一个矩阵范数‖·‖既是算子范数又是酉不变范数的条件。另外,文[4]中在讨论正规矩阵谱变分问题时,用到单调范数和单调酉不变范数的概念。本文证明了,只有F-范数是单调的酉不变范数。另外,在所有的p-范数中,只有1-范数和∞-范数是单调范数。 相似文献
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The nonlinear interactions between zonal flow and Rossby waves are studied by numerical simulations with focus on the effects of scalar nonlinearity. The numerical results show that the scalar nonlinearity has an appreciable influence on the Rossby dipole evolution and can reduce the threshold of the disturbance energy increase. 相似文献
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提出了TMS320VC54x dsp在外扩RAM、FLASH ROM和EPLD并行自举方式下54x系列DSP的程序空间被限制的问题的解决方案,并结合实例对该设计方案进行了详细阐述. 相似文献
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For further research on the gravity mechanism of the routing protocol in complex networks,we introduce the concept of routing awareness depth,which is represented by ρ.On this basis,we define the calculation formula of the gravity of the transmission route for the packet,and propose a routing strategy based on the gravitational field of the node and the routing awareness depth.In order to characterize the efficiency of the method,we introduce an order parameter,η,to measure the throughput of the network by the critical value of phase transition from free flow to congestion,and use the node betweenness centrality,B,to test the transmission efficiency of the network and congestion distribution.We simulate the network transmission performance under different values of the routing awareness depth,ρ.Simulation results show that if the value of the routing awareness depth ρ is too small,then the gravity of the route is composed of the attraction of very few nodes on the route,which cannot improve the capacity of the network effectively.If the value of the routing awareness depth ρ is greater than the network's average distance l,then the capacity of the network may be improved greatly and no longer change with the sustainable increment of routing awareness depth ρ,and the routing strategy performance enters into a constant state.Moreover,whatever the value of the routing awareness depth ρ,our algorithm always effectively balances the distribution of the betweenness centrality and realizes equal distribution of the network load. 相似文献
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张喜平 《高等学校计算数学学报》1997,19(1):40-47
1 引言 [1]中,讨论了C~(m×n)上的矩阵A的L_p范数/A/_p=(∑/a_(ij)/~p)和l_p算子范数‖A‖_p= max/AX/_p1』之间的关系,得到了下面的不等式: ‖A‖_p≤μ_p(n)/A/_p, ‖A‖_p≤μ_q(m)/A/_p, (1.1) 这里 相似文献
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遥感影像中边界云的匹配研究 总被引:2,自引:0,他引:2
根据遥感历史数据,获取图像中相对稳定的边界及其特征,基于云理论,对相对稳定的各类边界建立边界云,作为标准边界特征表达并用于边缘检测。通过云生成算法对待检测边界建立边界云,建立云匹配算法,将待检测边界的边界云与标准边界云进行匹配,从而确定新的边界和边界类型,达到边缘检测的目的,实验验证了该方法的有效性。 相似文献
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粗糙集理论研究中对求解属性的最小约简或较小约简以及求取最简规则集的算法已经进行了一些研究.而数据库是动态的,为了获取最小决策规则集,当增加新数据时,传统的方法通常需要对数据库中所有数据重新计算,效率欠佳,因此对动态数据进行增量式学习是非常必要的. 相似文献
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TMS320VC54x系列DSP芯片自举程序的优化设计 总被引:1,自引:0,他引:1
通过对TMS320VC54x DSP系列CPU用户开发主程序的自举过程分析,指出其自身自举程序的局限性,提出优化TMS320VC54x DSP设计的要素、方法,并用C程序进行实现. 相似文献