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- In this paper, using the continuation of coincidence degree theory, we obtain sufficent conditions for the existence of four periodic solutions of the delayed predator-prey system. 摘要文章利用重合度理论中的延拓定理，得到一类具一般时滞离散捕食-被捕食系统四正周期解的存在性的充分条件。
- Four periodic solutions 四周期解
- We have four periods of English a week. 我们每星期上四节英语课。
- The mathematicians turned to culling periodic solutions. 数学家们转而去挑选周期解。
- Play lasts for four periods of five minutes each. 比赛分4节，每节5分钟。
- I've been teaching four periods this morning. 今天上午我已教了四节课。
- Existence of almost periodic solutions for a class of pendular equations. 一类摆动方程概周期解的存在性。
- The bitch's cycle is divided into four periods. 母犬的发情周期被分为一下四个阶段。
- We have four periods in the morning. 我们上午上四节课。
- We have four periods of art a week. 我们一周有四节美术课。
- An existence theorem is obtained for the periodic solutions of Lagrangian systems by the least action principle. 用极小作用原理得到了非自治Lagrange系统周期解的一个存在性定理.
- I have been teaching four periods already this morning. 今天上午我已经上了四堂课了。
- The existence of periodic solutions of a neutral integro-differential equation with infinite delay was studied. 摘要本文考虑具无穷时滞中立型积分微分方程周期解的存在性。
- A energy iteration method for periodic solutions to second order strongly nonlinear non-autonomous systems is suggested. 摘要给出了确定一般二阶强非线性非自治系统周期解的能量迭代方法。
- Weng,P.& Liang,M.,The existence and behaviour of periodic solutions of Hematcpoiesis model [J],Mathematica Applicate,8(1995),434-439. 黄启昌;具有无限时滞的泛函微分方程的周期解的存在性[J];中国科学;14A:10(1984);882889.
- Furthermore, the direction and stability of bifurcating periodic solutions are investigated by normal form and center manifold theory. 然后，应用规范型和中心流形理论，得到关于确定Hopf分支方向和分支周期稳定性的计算公式。
- We discuss the existence of asymptotically periodic solutions for a class of nonlinear differential equations combining dissipative type conditions. 结合耗散型条件;讨论一类非线性微分方程渐近概周期解的存在性.
- The propose of "Four Period of Tang Poetry" reflected that the historical stages of Tang poetry were more ahistorically and logically. “四唐说”的拈出,标志着人们对唐诗流程有了更合乎历史与逻辑的分期。
- Lenin's view on Marxism develops and distills logically in these four periods. 列宁的马克思主义观就是在这四个时期逻辑地发展和升华的。
- By using critical point theory,we obtain some sufficient conditions for the existence of multiple periodic solutions to a discrete Hamiltonian system. 本文利用临界点理论;建立了一类离散哈密顿系统存在多个周期解的一些充分条件.
