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- By Hurwitz criterion, we prove the existence and local stabilities of the positive periodic solution. 利用Hurwitz判据得到了地方病平衡点的存在性及局部稳定性。
- By using a fixed point theorem in cones, we investigate a second-order equation and the theorem of existence of unique positive periodic solution is given. 摘要应用不动点定理，研究了一类二阶时滞微分方程，给出了其唯一周期正解的存在性定理。
- There is positive proof that he did it. 有确切的证据证明他做了此事。
- Baaed on the fixed point theorem of two-point extension type, sufficient conditions are derived for the existence of positive periodic solutions of delay difference equations. 摘要利用两点拉伸型不动点定理给出一阶时滞差分方程周期解存在性的充分条件。
- That period was a bright page in the history of Chinese literature. 那个时期是中国文学史上光辉的一页。
- Let us hope that the period of this injustice will be over soon. 让我们希望这个不公正的时期很快结束吧。
- PERIODIC FUNCTION AND ITS LEAST POSITIVE PERIOD 周期函数及其最小正周期
- By using the continuation theorem of topology degree theory and properties of nonsingular M-matrix, we obtain sufficient conditions for the existence of positive periodic solutions of this system. 利用拓扑度理论中的连续定理以及M-矩阵的性质获得了该系统正周期解存在的充分条件。
- Childhood is a period of rapid growth. 幼年是生长迅速的时期。
- He consulted the chronicles of the period. 他参考了这一时期的编年史。
- By using a fixed point theorem in cones, sufficient conditions are obtained for the existence of multiple positive periodic solutions for a class of difference equations with state-dependent delays. 本文利用锥不动点定理,得到一类具时滞状态依赖差分方程多周期解的存在性的充分条件,且我们的结果推广和改进了原有的结果。
- Chapter two establishes easily verifiable sufficient criteria for the existence of positive periodic solutions of the generalized ecological competition system with impulse and infinite delay. 第二章证明本文的主要结果，建立所研究系统存在正周期的充分性判据；
- Sufficient conditions are obtained for the global existence of a positive periodic solution of periodic neutral delay predator-prey system by using the method of coincidence degree theory. 利用重合度理论建立了一类周期中立型时滞捕食者-食饵系统正周期解的全局存在性的充分条件.
- He had to decide within a given period. 他得在一定时间内作出决定。
- Her behaviour was a positive outrage. 她的行为残暴到了极点。
- She has a detailed knowledge of this period. 她对这段时期的情况了解地相当详细。
- In that period auto sales hit a14-year low. 这时期汽车销售量达到14年来最低水平。
- In this period, unemployment reaches record levels. 这段时间的失业人数又达到了创纪录水平。
- I'm positive she told us to meet at noon. 我肯定她是告诉我们在中午见面。
- Which period of history are you studying? 你正在学哪一段历史？
