Motion that is repeated in equal intervals of time. The time of each interval is the period. Examples of periodic motion include a rocking chair, a bouncing ball, a vibrating guitar string, a swinging pendulum, and a water wave. See also simple harmonic motion.

在等时间间隔进行的重复运动。每一间隔的时间被称为周期。周期运动的例子有:晃动着的摇椅、弹跳着的球、振动的吉他弦、摇晃的摆以及水波等。

属类：自然科学-物理-

The case of a harmonic oscillator driven by sinusoidally varying force is an extremely important one in many branches

在许多领域中受正弦变化力策动的谐振子是一种十分重要的运动。

属类：综合句库--

These may be required where harmonic currents caused by the thyristor phase control of the reactor current must be filtered to prevent unacceptable transmission bus voltage distortion.

这里须滤去由电抗器相位控制引起的谐波电流以避免不能接受的输电母线电压畸变。

属类：工程技术-电力英语-

This is a most useful form of the harmonic oscillator hamiltonian and it will be encountered in several subsequent developments

这是谐振子哈密顿算符最有用的形式,在下文中还会碰到这个表达式。

属类：综合句库--

Harmonic filters for these harmonics are generally provided on the AC and DC sides of the converter terminals.

这些谐波的滤波器通常安装在换流终端站的交流侧和直流侧。

属类：工程技术-电力英语-

Thus, as the size of the user load decreases with respect to the size of the system, the larger is the percentage of harmonic current the user is allowed to inject into the utility system.

这样,随着用户负荷大小相对系统大小的比值的减小,允许进入公用电力系统的谐波电流百分比就增大。

属类：工程技术-电力英语-

Modal and Harmonic Response Analyses of straight-pipe Model Driven by Ultrasonic Travelling Wave micro-fluid

直管形超声行波微流体驱动模型的模态与谐响应分析

属类：行业术语-中文论文标题-

A Comparative Study on the Chinese multi-part ethno-music and Western Harmonic Thinking

中国民族音乐多声部与西方现代和声思维的比较

属类：行业术语-中文论文标题-

intermediate-frequency harmonic interference

中频谐波干扰

属类：综合句库-英汉综合-

The Value of Tissue Harmonic Imaging Technique in Diagnosis of Hepatic Cancer

组织谐波成像在肝癌诊断中的应用

属类：行业术语-中文论文标题-