排序方式: 共有6条查询结果,搜索用时 0 毫秒
1
1.
2.
多年教学经验告诉我,在力学部分,学生在认真审题、确定研究对象、分析物理过程以后,对如何选用物理规律、公式,分析问题、建立方程求解,普遍感到困惑. 相似文献
3.
4.
考虑了一类营养的转化率受到随机噪声干扰,具有Holling Ⅱ型功能性反应函数的随机恒化器模型.通过构造Liapunov函数,利用停时、伊藤公式证明了模型正解的全局存在唯一性.研究了模型解的长期渐近性态,主要揭示在不同条件下模型的解围绕其相应确定性模型的各类平衡点的振荡行为. 相似文献
5.
一类可积非哈密顿系统的极限环个数的上界 总被引:3,自引:0,他引:3
In this paper, we consider the perturbations of two non-Hamiltonian integrable systems(1.3)μ, (4.1)μ. For the former,it is proved that the system under the polynomial perturbations hasat most f-n/2] limit cycles in the finite plane and the upper bound is sharp. The proof relies on acareful analysis of a related Abelian integral. For the latter, we obtain an estimate number of isolatedzeros of the corresponding Abelian integral. 相似文献
6.
In this article, using multi-parameter perturbation theory and qualitative analysis, the authors studied a kind of cubic system perturbed by degree five and ob-tained the system that can have 17 limit cycles giving their two kinds of distributions (see Fig.5). 相似文献
1