查询词典 periodic

The fundamental response of a nonlinear nonautonomous system is periodic ,quasi- periodic and chaotic motion.

对于非线性非自治系统的响应主要有周期、准周期和混沌几种状态。

In the second paragraph, the first is a periodic sentence for the beginning with a prepositional phrase; the second is a loose sentence; the third is again a periodic sentence for

体裁和语篇之类的符号结构的社会涵义无疑是非常明显的，但只有将它们放在杂乱无章的社会实践中来考察，才能更清楚它们的社会语篇意义。

Such a sentence is called periodic, as contrasted with the other type, loose, of which this is an example — a sentence that might be stopped at several points(in this sentence, after periodic, type, loose, example, or points).

一个句子如含有两个或更多的在语法形式和作用上相同的部分，便是有平行结构的句子。这种句子的语气强劲有力。请看以下各例

The existence of two positive periodic solutions and one positive periodic solution is obtained.

据我们所知，这是用锥上的Deimling不动点定理得到二阶微分系统的分支的最早的工作。

Which guarantee the existence and uniqueness of periodic and almost periodic solutions of the system.

从而给出了保证系统存在惟一周期和概周期解的一组充分条件。

This paper investigates the orbits of sub-harmonic and chaos in power system under periodic and quasi-periodic perturbation .

研究了电力系统在周期和准周期扰动下的次谐和混沌轨道。

Open Linear Encoder includes main grating scale and optical encoder head. This optical encoder head includes LED light source, optical detector module, and secondary phase-grating. LED light will pass through the plano-convex lens and produces parallel light. As the parallel light pass through secondary grating, the quadratic image display on the main grating scale. And the Moire interference will be reflected from the main grating scale and detected by optical detector module, as there is a relative shift between the main and secondary grating. From detecting the periodic sinusoidal signal with phase difference 90°, the period represents the grating pitch, using the counter to detect the number of periodic signals to get the displacement, and we can adapt the technology of electron subdivide further to increase the resolution of measurement .

反射式光学尺包括主光栅尺及光学读头，光学读头包含LED光源、光侦测器模组及相位式副光栅，LED光源经平凸透镜，产生平行光穿透副光栅后，副光栅之二次成像投射在反射主光栅尺上，当主、副光栅因相对运对产生之Moire干涉经主光栅尺反射至光电检测器，检出相位差90°之周期性弦波讯号，其周期代表栅距，因此可用计数器检出周期性讯号数目得到位移量，可进一步采用电子细分割技术提高解析度。

The periodic change of the hydraulic pressure in a oil tank under periodic flow drive is discussed.

在进、出流体的周期性激励条件下，讨论了动力油箱内液动压力的周期性。

It is indicated that besides periodic and quasi periodic vibrations the system shows different forms of chaotic motion and bifurcation phenomena.

碰摩转子系统所展示的混沌运动以及所具有的各种现象，作为这类系统的显著特征，可以用于诊断汽轮发电机组中经常发生的碰摩故障

A novel four-dimensiond hyperchaos system with only one nonlinear term is reported. The Lyapunov exponents spectrum, periodic orbit, quasi- periodic orbit, and the chaos and hyperchaos attractor of this system are obtained.

构造了只包含一个非线性项的四维超混沌系统，得到了系统的Lyapunov指数谱、周期轨道、拟周期轨道、混沌和超混沌吸引子。

No clear conclusions can be made about the predictie alidity of specific measures, they found, except for criteria for the underuse of drugs for cardioascular disease.

除了心血管病不合理用药标准外，对于特定评价方法的预测效度没有明确的结论。

The third and last is that almost all of them, being infinite in number, have been impostures, and by idle and crafty brains merely contrived and feigned after the event past.

第三、即最后一点是：几乎所有这些不胜枚举的预言都是欺人之谈，都是在事件过后由无聊而狡猾的脑筋推测与凭空捏造的。