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periodic spring 周期泉，周期性泉

periodic payment 定期付款

• By applying a fixed point theorem, the authors study the existence of positive periodic solutions to a class of differential equations with stated-dependent delay.

运用不动定理研究一类具状态依赖时滞微分方程周期存在性。

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• By using a well-known fixed point index theorem, we obtain the existence, multiplicity and nonexistence of positive periodic solution(s) to this equation.

利用一个著名不动指标定理获得方程周期存在性、多重性不存在性。

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• A fixed point theorem in cone is used to study the existence of normal solution of second-order periodic boundary value problems.

利用不动定理研究一类二阶非线性周期值问题存在性。

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• Using fixed point theorems, in this paper we give sufficient conditions of the existence of bounded mild pseudo almost periodic solution for some semilinear differential equations.

利用不动理论给出一类半线性微分方程有界调和周期存在充分条件

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• In this paper, by using the fixed point index method, the authors discussed the periodic boundary value problem of first order differential systems.

摘要利用锥上指数研究一阶非线性常微分方程组周期问题

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• In this paper, by using the fixed point index method, the authors discussed the periodic boundary value problem of first order differential systems.

利用指数研究一阶非线性常微分方程组周期问题

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• According to the theoretical results, we adjust the circuit parameters and then can find the phenomena of fixed point, periodic attractor, and chaos.

根据理论分析结果调节电路参数可以成功地看到倍周期混沌现象

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• By using the fixed point theorem on cone, this paper studies the existence of positive solutions for first order periodic boundary value problem with impulses.

利用不动定理讨论阶脉冲微分方程周期问题存在性。

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• Using the theory of fixed point, we give a theorem about the existence of asymptotically almost periodic solution for a class of delay integral equations.

利用不动理论给出一类时滞积分方程近概周期存在定理

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• This paper presents a new existence theory for positive solutions to a kind of second-order discrete periodic boundary value problems by employing a fixed point theorem in cones.

运用锥不定理给出了二阶离散周期问题新的存在性定理。

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• Some solvability conditions of periodic solutions are obtained for a class of first order(superquadratic) non-autonomous Hamiltonian systems in light of the minimax methods of critical point theory.

运用临界点理论中的极小、极大方法得到一类二次哈密系统周期的存在性的存在性定理。

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• Accordingly we have weakly almost periodic of point in a bounded C-semigroup.

相应获得了有界c -半群概周期

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• By using fixed point theorem and constructing almost periodic sequence solution for difference equation, the authors get the sufficient conditions for the existence of the almost periodic solution.

利用不动方法差分方程构造周期获得概周期解存在充分条件

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• Some sufficient conditions for the existence of periodic solutions of the equation are obtained by using the theory of critical point in functional.

再利用临界点理论得到了方程具有周期充分条件

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• The periodic solution can be bifurcated from equilibrium point with the variation of parameters.

系统随着参数变化平衡点岔出周期

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• The temporal periodic pulse can stabilize the system to spatial fixed point with temporal periodicity and spatial quasiperiodicity.

时间周期脉冲方法则实现系统时间周期空间空间周期的控制。

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• 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.

应用不动定理研究一类二阶时滞微分方程，给出了其唯一周期存在性定理。

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• The zero transfer point can be set arbitrarily by appropriately selecting transmitting periodic time T and number N, and it is advantageous to eliminate some interference in some frequency points.

适当选择发射周期T周期N可以随意设置梳状滤波器传输有利于消除某些频率的干扰；

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• Based 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.

利用两点拉伸不动定理给出时滞差分方程周期存在性充分条件

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• The concept of Geochemical Field of the elements is derived from the point mentioned above and the locations of the elements in the periodic table.

据此并结合元素周期表中的位置得出了元素地球化学场概念

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• Therefor, periodic inspection of the liver, the kidney and blood routine examination, adjusting treatment plan timely and strengthening instruction to the patients are the key point in prognosis.

因此定期检查肾功能常规及时调整治疗方案加强患者的教育，预后良好关键

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• The stabilization of an unstable periodic orbit in a neighborhood of an unstable fixed point is studied.

讨论了不稳定邻域不稳定轨道的稳定问题。

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• 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一类离散哈密顿系统存在多个周期一些充分条件

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• Using fixed point theorems, in this paper we give sufficient conditions of the existence of asymptotically-almost-periodic solution for some nonlinear delay integral equations.

利用不动理论给出一类非线性延迟积分方程正渐近概周期存在充分条件

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• Using fixed point theorems, in this paper we give sufficient conditions of the existence of asymptotically-almost-periodic solution for some nonlinear delay integral equations.

利用不动理论给出一类非线性延迟积分方程正渐近概周期存在充分条件

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