Periodic change imposed on a controlled variable or a function by a controller.

A wave that repeats, like the one above, is called a periodic wave.

如上图所示的周期性的波, 称之为周期波.

The interaction properties of periodic waves are found to be inelastic.

研究了这些周期波之间的相互作用,发现其相互作用是非弹性的.

The method can be used in the measurement of periodic and nonperiodic signal.

该方法可以被广泛地应用于高精度频率、时间及相位等信号的测量.

Elected officials must reelection at periodic intervals, when their record is subject to intensive public scrutiny.

选举产生的官员必须定期接受改选, 届时其业绩要受到彻底的公开审查.

Implement equipment periodic maintenance and maintenance plan.

设备的定期保养及维修计划实施.

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.

A method of target classification based on JEM periodic signature is proposed.

提出了基于JEM周期特征的目标分类方法.

Like macroeconomy, the development of real estate industry also shows a phenomenon of periodic fluctuation.

与宏观经济运行过程中一样, 房地产业也客观存在着周期波动现象.

The survival strategy of herpes simplex virus centers on developing latent infection and periodic reactivation.

单纯疱疹病毒在体内的生存策略是建立潜伏感染,一定条件下被激活而致病情复发.

When workers think a periodic purge is imminent, everyone feels equally threatened.

当员工听说要定期裁员时, 人人都同样地感到受威胁.

Valuations not yet subject to systematic periodic adjustment.

评估还没有系统的周期性调整.

Another example is the F ring, whose periodic clumps seem to have been imprinted by Prometheus.

环是另一个例子, 它起伏规律的纹块似乎是由土卫十六印制出来的.

The process of mineral resources exploration and exploitation has periodic, progressive and repeated features.

矿产资源勘查开采过程具有周期性 、 反复性和渐进性的特点.

Some existence theorems of periodic traveling wave solutions for this kind generalized BBM equation are given.

在给定的参数条件下,得到了该方程光滑孤立波解及周期行波解的所有可能的显式表达式.

The number of complete cycles of a periodic process occurring per unit time.

生命周期是经济学中用的一个术语.

The revelers drank tequila from shot glasses at the bar.

纵酒狂欢的人在酒吧畅饮龙舌兰酒.

The clubs attract revelers as young as thirteen.

俱乐部吸引了大批狂欢者,最年轻的才13岁.

A year ago, those nightclubs were packed with revelers.

一年以前, 那些夜总会总是人满为患.

Revelers at the'Villains , Vixens and Vampires'themed Masquerade March in Key West , Florida.

弗洛里达州的“流氓 、 泼妇和吸血鬼”主题假面舞会.

Free libations, holiday revelers, and course, fireworks abound.

免费的酒水, 节日狂欢者, 当然还有礼花燃放.