排序方式: 共有19条查询结果,搜索用时 125 毫秒
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ZverovichIE ZverovichOI 《高校应用数学学报(英文版)》2004,19(2):125-132
Two new hereditary classes of P5-free graphs where the stability number can be found in polynomial time are proposed. They generalize several known results. 相似文献
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Millimeter-wave radio scattering from discharges stimulated by a laser pulse in the dusty atmosphere
A. G. Kislyakov V. A. Kanakov Yu. M. Sorokin S. E. Finkel'shtein 《Radiophysics and Quantum Electronics》1992,35(1):1-4
Nizhegorod State University. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 35, No. 1, pp. 3–8, January, 1992. 相似文献
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循环流化床气固曳力模型 总被引:1,自引:0,他引:1
气固曳力是稠密气固两相流动,尤其是垂直流动中的主要作用力,相应的模型也是数值模拟中准确描述气固两相运动的关键.为了解决现有经验或半经验模型的普适性问题,合理描述流动中经常发生的颗粒团聚现象及其对气固曳力的影响,从理论分析入手,运用最小能量的概念,将传统的CFD方法与宏观的系统分析方法相结合,建立了一个新的计及颗粒团聚效应的气固曳力理论模型.与现有模型相比,新模型不仅具有相同的函数变化关系,可合理地描述气固两相相互作用的物理过程,而且避免了以往经验系数不准确导致的各种误差,为稠密气固两相流动的数值描述提供了重要依据. 相似文献
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The Fermi-Pasta-Ulam (FPU) paradox consists of the non-equipartition of energy among normal modes of a weakly anharmonic atomic chain model. In the harmonic limit each normal mode corresponds to a periodic orbit in phase space and is characterized by its wave number q. We continue normal modes from the harmonic limit into the FPU parameter regime and obtain persistence of these periodic orbits, termed here q-breathers (QB). They are characterized by time periodicity, exponential localization in the q-space of normal modes and linear stability up to a size-dependent threshold amplitude. Trajectories computed in the original FPU setting are perturbations around these exact QB solutions. The QB concept is applicable to other nonlinear lattices as well. 相似文献
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Ikonnikov V. N. Kanakov V. A. Parkhachev V. V. 《Radiophysics and Quantum Electronics》2019,62(1):77-84
Radiophysics and Quantum Electronics - We propose a method allowing one to improve the accuracy of retrieving the temperature distribution over the object surface by taking into account the... 相似文献