它们“想”以小提琴琴弦一样的方式在给定的频率上进行振动——在小提琴中，以几乎任何形式馈入系统中的少量能量产生了振动。
They "want" to oscillate at a given frequency in the same way that a violin string does — a small amount of energy fed into the system, in almost any form, creates the oscillation.
多模箱式再生系统中过滤体的尺寸可以不受安装空间的限制，并且可以采用多个微波源馈入功率以提高再生腔中的微波功率密度或改善加热均匀性。
In this system, the size of the filter is not limited by the space of installment and it is possible to heat of the filter by using more than one microwave power supply.
此方法从干扰源处——接触网与受电弓之间馈入高频信号，由电气化铁道系统辐射出去进行测量。
According to the measurement method, feeding a rf sinusoidal signal at location of interference source, so this signal is radiated by electrified railway system.
多直流馈入输电系统的出现给电压稳定研究带来了全新的课题，电压失稳有可能成为这类电网安全稳定运行的最大威胁。
The study of voltage stability about multi-infeed DC transmission systems is a new research field, so that voltage instability may probably threaten the security and stability of power grid.
基于电路基本理论知识，推导出多馈入交、直流并联的高压直流输电系统耦合导纳和换相电压关系表达式。
Based on electrical circuit theory, the formulation of the relation between mutual admittance and converter commutation voltage of the multi-infeed HVDC system was given.
提出一种基于广域测量系统的多馈入高压直流（HVDC）模糊自适应协调阻尼控制器。
A wide-area measurement system(WAMS)based fuzzy adaptive coordinative damping controller is developed for multi-infeed HVDC system.
由于传统短路比不能考虑直流间的相互作用而亟待提出适用于多馈入交直流系统的短路比定义。
Because the traditional short circuit ratio(SCR) is not able to reflect the interaction of HVDCs into account, it is urgent to propose a new definition of SCR for MIDC systems.
分析负荷模型对多馈入交直流系统功角稳定性的影响。
The influences of load models on transient stability of a multi-infeed DC and AC system are analyzed at length.
在本文第五章中，为了提高多馈入交直流系统的暂态稳定性，提出一种直流非线性变结构附加功率调制器。
In chapter 5, to improve transient stability of multi-infeed HVDC transmission systems, a kind of HVDC additional power modulator based on nonlinear variable structure theory is proposed.
在本文第五章中，为了提高多馈入交直流系统的暂态稳定性，提出一种直流非线性变结构附加功率调制器。
In chapter 5, to improve transient stability of multi-infeed HVDC transmission systems, a kind of HVDC additional power modulator based on nonlinear variable structure theory is proposed.
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