periodic

adj.

1. 间发性的；定期的；周期的
   happening fairly often and regularly
   1. Periodic checks are carried out on the equipment.
      设备定期进行检查。

1. ADJ 间发性的；定期的；周期的
   Periodic events or situations happen occasionally, at fairly regular intervals.
   1. Periodic checks are taken to ensure that high standards are maintained.
      定期检查以确保维持高水准。
   2. ...periodic bouts of illness.
      周期性发病

1. Periodic checks are taken to ensure that high standards are maintained.
   定期检查以确保维持高水准。
2. There may be periodic police 'sweeps' of crime in the area.
   警方可能对该地区的犯罪活动进行定时的“扫荡”。
3. These arrangements are subject to periodic reviews.
   这几项安排每隔一定时间须予复查。
4. The mathematicians turned to culling periodic solutions.
   数学家们转而去挑选周期解。
5. The periodic buckling leaves the fibre in a waved conformation.
   周期性的弯折在纤维中造成波形构成。
6. The cycles are periodic and optional.
   循环是阶段性和可选择的。
7. This figure demonstrates periodic task scheduling.
   本图演示了周期性任务调度。
8. The RUP artifact Issues List is updated and maintained by project management on both a periodic and event-driven basis.
   项目的管理人员在定期的和事件驱动的基础上，更新和维护RUP中的工件问题列表（IssuesList）。
9. By using properties of scalar almost periodic function, properties of uniform almost periodic matrix function are discussed.
   利用纯量概周期函数性质讨论了一致概周期矩阵函数的一些性质。
10. The separability of asymptotically strongly periodic function space and asymptotically periodic sequence space are also discussed.
    研究了渐近强周期函数空间、渐近周期序列空间的可分性质。
11. This paper studies the existence of periodic solutions for some non-autonomous second order systems.
    研究一类非自治二阶系统周期解的存在性问题。
12. By using the mean values of the periodic coefficients, the approximations of the unstable frequencies are obtained.
    用周期性系数的平均值法获得了不稳定频率的近似值。
13. Atomic structure and the periodic table.
    原子结构和元素周期表。
14. A mechanical model of two-degree-of-freedom system with clearance was established, whose periodic motion and disturbed motion were studied.
    建立了一类两自由度含间隙系统的力学模型，并研究了该系统的周期运动及运动的受扰运动。
15. A circuit that provides periodic signals to control and synchronize other circuits.
    一种提供周期性信号的电路，用于控制和同步其它电路。
16. This paper discusses the exponential stability of periodic solution for impulsive neural networks.
    本文讨论了一类脉冲神经网络的周期解的指数稳定性。
17. This system is intended to supplement the on-crank system by increasing the time intervals between periodic on-crank cleaning.
    此系统旨在通过增加定期曲柄上清洁之间的时间间隔对曲柄面系统进行补充。
18. In periodic systems, the time interval between two corresponding points on successive cycles.
    周期系统中，在相继两循环中两个对应点之间的时间间隔。参阅frequency。
19. The periodic initial value problem of a class of generalized symmetric regularized long wave equations is considered.
    考虑了一类广义的对称正则长波方程的周期初值问题。
20. A energy iteration method for periodic solutions to second order strongly nonlinear non-autonomous systems is suggested.
    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。
21. The time periodic solution problem of damped generalized coupled nonlinear wave equations with periodic boundary condition was studied.
    本文研究了半线性波动方程在非线性项和初值满足一定条件下解的存在性。
22. And discuss the properties of high order arithmetical infinite matrix and periodic infinite matrix.
    给出了数阵的加法、数乘和乘法定义，并给出高阶等差数阵和周期数阵的运算性质。
23. In chapter five, we calculate the conductance of two typical open periodic structures.
    在第五章中，我们计算了两种典型的开放周期型结构的电导。
24. Analysis of a periodic function into a sum of simple sinusoidal components.
    周期函数解成简单正弦曲线之和的分析。
25. The sum of a series of trigonometric expressions; used in the analysis of periodic functions.
    三角表达式级数之和，用在周期函数分析上。
26. The accounting recording procedures are different under the periodic inventory system and the perpetual inventory system.
    定期盘存制和永续盘存制的会计入账程序是不同的。
27. We study the property of complex periodic function, and obtain some correlation results.
    对复周期函数的性质进行了一些研究，得到了若干有关的结果。
28. The periodicity of positron annihilation parameter is related to periodic change of lattic distortion and crystal defect.
    正电子湮没参数的周期性，与点阵畸变和晶体缺陷的周期性变化有关。
29. And quasi-periodic and chaotic motion can bifurcate from periodic motion when parameters of the system are changed.
    而在系统参数变化时，又由周期分叉形成了准周期和混沌。
30. And now we can rationalize what is going on in the Periodic Table.
    现在我们能合理解释，元素周期表上的东西了。

adj

1. recurring or reappearing from time to time
   1. periodic feelings of anxiety

   Synonym:    occasional

2. happening or recurring at regular intervals
   1. the periodic appearance of the seventeen-year locust

   Synonym:    periodical