查询词典 harmonic

According to longitudinal vibration partial differential equation of rod, the longitudinal vibration displacement response of uniform infinite rods by the harmonic point forces was derived.

longitudinal vibration ； wave approach ；从杆纵向振动的偏微分方程出发，推导了无限长杆在简谐点力作用下的纵向振动位移响应，在此基础上，基于结构线性假设和波的叠加原理，得出了有限长梁纵向振动谐响应的波动表达式，列出了常用的边界条件。

I have foundthat in the stock itself exists its harmonic or inharmonious relationship tothe driving power or force behind it.

我发现股票本身与它"背后的驱动力"之间存在着某种和谐不和谐的关系。

The input current is analyzed by switching function method and the expression of lower harmonic current is given.

采用开关函数法对网侧的输入电流进行谐波分析，得出输入电流中低次谐波的表达式。

Exact and real-time detection of the instantaneous variable harmonic and reactive current in power system is the premise for compensation of active power filter.

实时、准确地检测出电网中瞬态变化的谐波与无功电流是有源电力滤波器进行精确补偿的前提。

Active power filter; harmonic current; instantaneous reactive power theory; low pass filter

有源电力滤波器；谐波电流；瞬时无功功率理论；低通滤波器

Harmonic current; reactive current; instantaneous reactive power theory; matlab simulation

谐波电流；无功电流；瞬时无功功率理论；Matlab仿真

A closed-loop detecting circuit of harmonic and reactive current based on instantaneous reactive power theory has been analyzed and used in this APF system. It can achieve the accurate and real-time detection, and make the system stable.

本文将基于瞬时无功功率理论的自适应闭环检测方法应用于有源电力滤波器，使系统在快速、准确检测谐波及无功电流的同时，具有良好的鲁棒性。

Instantaneous reactive power theory applied on harmonic and reactive current real-time detection is presented in this paper.

介绍了瞬时无功功率理论在谐波和无功电流实时检测方面的应用。

The research is mainly about the harmonic current detection method that based on the instantaneous reactive power theory.

所提出的检测方法用模拟电路加以实现，可对谐波电流、无功电流进行分别检测或综合检测。

The results indicate that it is feasible to test real time harmonic current using the method based on instantaneous reactive power theory.

结果表明，利用基于瞬时无功功率理论的方法实时检测弧焊电源的谐波电流是可行的。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。