查询词典 harmonics

Based on the relationship between the harmonics, a method that uses nonlinear acoustic harmonic amplitude ratio to distinguish microcracks in cement-based materials. Experimental tests were performed by two groups of mortar samples.

利用非线性波动理论中二阶谐波幅值与基波幅值的关系，探讨了通过测试谐波比关系的变化，获得材料非线性特征改变，进而判断材料损伤的方法，并进行了试验研究。

One of the major effects of power system harmonics is to increase the current in the system.

谐波对电力系统的主要影响之一是增加系统中的电流。

An approach of measuring harmonics in power system based on artificial neural network is put forward in this paper.

提出了一种基于人工神经元网络的电力系统谐波测量方法。

It is made up of a superposition of harmonics.

它的谱由一组线条组成。

The technology of measuring and restraining harmonics has drawn more and more attention.

谐波检测与抑制技术的研究越来越受到人们的重视。

To be effective the analysis is taken to the first three harmonics.

为了有效的分析是采取前三谐波。

Second, very tall order harmonics can be seen.

其次，很高的谐波可以看到。

The conclusions obtained in this paper are of great help to the design of the harmonics detecting circuits.

文中的仿真研究结果能为设计谐波检测电路提供指导。

At the same time, the result of simulation shows that the method can detect the harmonics more accurately.

同时通过仿真结果表明，该方法能够更加实时有效的检测谐波。

At last several methods to optimize harmonics are put forward and compared.

最后，提出了几套改善谐波的措施，并对它们的技术优劣作了比较。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。