频率响应

On the other hand, when the optical filter detunes from the laser wavelength a little, a narrow notch filter with flat passband is realized.

此结构通过调节可调谐窄带滤波器的中心波长可实现高Q与通带相对较平的陷波频率响应的切换。

There are three parts included. The first part is the prepositive-amplifier, it gets broadband high gain and flat frequency response. The second part is the U band quadrupler, which composed of two doublers using a PHEMT chip HMMC-5040, a Schottky diode of DMK-2790, a HMMC-5040 amplifier, and a fin-line transitional stage. Maximum output power higher than 60mW is obtained in V band. The third part is a 2nd harmonic gunn oscillator injection locked by the Fundamental Wave,which get about 2GHz locked bandwidth in W band.

电路主要由三部分组成，第一部分为采用HMMC-5618设计的前置放大器，实现了宽带高增益和平坦的频率响应；第二部分为设计的主体，由HMMC-5040设计的二倍频器、DMK-2790设计的二倍频器、HMMC-5040设计的放大器及鳍线过渡段组成的U波段四倍频器，在U波段实现了最高60mW以上的输出功率；第三部分为基波注入锁定谐波Gunn振荡器，在W波段实现了近2GHz锁定带宽。

This paper simulates how the additional flutter signal impacts on oil pressure and actuator output when the dead zone is kept. The proper principle of flutter signal for jam diagnosis is given. Based on the given flutter signal, different jams caused by jam of the EH servo valve under different operating condition are simulated and the output of the oil pressure and actuator are presented. Meanwhile, waving threshold of the oil pressure for jam diagnosis is given. The simulations and analysis prove that the jam fault identification of the EH servo valve based on flutter signal is feasible.

在应用附加振颤信号防止和识别卡涩故障的前提下，确定了振颤信号的选取原则，并采用仿真的方法深入探讨了3种变工况条件下不同卡涩程度对电液转换器油压和油动机输出的影响，提出了油压阈值的卡涩判断标准，论证了基于振颤信号幅值与频率响应监测电液转换器卡涩故障诊断方法的可行性。

Note: The impact pulse width and frequency response range are difference with the hammer and its material.

注：冲击脉宽及频率响应范围随锤头及其材料不同而有所不同。

The result is crystal-clear midrange, snappy mid-bass without any audible ringing or hang-over, and a smooth frequency response that needs no compensation circuitry in the crossover.

其结果是水晶般清晰的中端，快中低音没有任何声音响起，或悬垂式，并顺利的频率响应，需要任何补偿电路中的交叉。

C Over a frequency range of 0 – 100 kHz, the measurement circuitry is to have a frequency response (ratio of indicated to actual value of current) that is equal to the ratio of the impedance of 1500 ohm resistor shunted by a 0.15 F capacitor to 1500 ohms.

频 率高于0-100KHz，测量电路有一个频率响应(标记电流和实际电流的比值)并且等于1500的输入阻抗并联上一个0.15F ，的电容与1500的比值。

Gear box ; frequency response function ; impulse excitation ; dynamic behaviour

减速器；频率响应函数；脉冲激振；动态特性

The method to setup high frequency transfer function model for instrument transformer in GIS by means of Vector Fitting is presented. According to the practical condition, the order reduction method for the high frequency transfer function model of instrument transformer is proposed.

提出了采用矢量匹配法逼近互感器实测频率响应特性建立其高频传递函数模型的方法，并提出了互感器高频传递函数模型的降阶方法。

On the basis of instantaneous forced analysis to short circuit of power transformer and numerical value calculation using low voltage impulse analysis, the paper presents the essentiality of winding distortion after short circuit of power transformer. By contrasting the three main ways of the world such as low-voltage impulse、 short circuit impedance analysis and frequency response analysis , FRA is adopted for distortion testing. Then we design a new testing instrument of transformer winding distortion—testing system of transformer winding distortion.

本文首先在对电力变压器短路时的瞬时受力分析及所受电磁力的有限元法的数值计算的基础上，论证了电力变压器短路以后进行绕组变形测试的必要性；然后通过比较的方法对目前国内外主要使用的三种方法：低压脉冲法、短路阻抗法和频率响应法，进行了一一对比，并根据对比结果，确定在本课题中使用频响法；最后在理论研究的基础上，设计出了一种新型的变压器绕组变形测试仪——电力变压器绕组变形测试系统。

It can get pretty loud before distorting, but I don't like the tweeters on it and the high frequency response is pretty bad.

它可以得到相当响亮之前，扭曲，但我不喜欢高音就资讯科技和高频率响应是非常糟糕的。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。