频率

But that's not all - unlike many valve equalisers, the EQ-2 provides continuously variable frequency controls, so choice of frequency is not limited to switched selections.

这还不是全部。不像许多电子管均衡器，EQ-2提供连续可变的频率控制，频率的选择不受选择开关的限制。

Chapter seven studies the methods of finding resonance frequency of centrifugal worm housing, analyses the relationship between the sound radiation of fan and wheel tip velocity index under different worm housing sound impedance and a new noise control method is presented for centrifugal fan.

第七章，研究了离心风机蜗壳基频共振频率及高阶模态频率的确定方法，分析了蜗壳声阻抗及其对叶轮声辐射轮缘速度指数的影响，为风机的降噪提供了一种新的途径。

3 Fatigue strength analysis of WIG structure Combining the classical fatigue S-N curve with the theory of fracture mechanics the fatigue strength of some weak parts of WIG has been calculated.

产生影响的主要是结构的低阶频率，所以今后实验中如何排除弹性支撑刚度对结构低阶固有频率影响是今后实验中需要解决的问题。

The Hilbert modulus is defined as the sum of the square of a signal and its conjugation.Hilbert modulus is used to covert the fundamental component in original phase current to direct current component,the fault characteristics frequency of bar break is transformed into the twice slip frequency.The problem is solved that fault characteristic component in the spectrum analysis of the current is easily to be blanketed by fundamental component and is hard to highlight fault characteristics.

将Hilbert模量定义为原始信号与其共轭信号的平方和，利用Hilbert模量将原相电流中的基波分量转变为直流分量，原频谱分析的转绕组断条的故障特征分量转变为频率为二倍转差频率的电流分量，决了相电流频谱分析方法中断条故障特征成分容易被基波湮没而难以突出故障特征的问题。

Because of the thin thickness, the skin of gun-bay structure, the frame plane, the oil tank floor, and the plane that hold up the smoke of aircraft gun is considered as shell element.

运用Lanczos算法对炮舱结构有限元模型进行模态分析，得到炮舱结构前20阶的固有频率和振型，分析前6阶频率下炮舱整体结构以及炮梁的振动特点。

According to the principle and characteristic of the formation of standing wave, the authors have developed a standing wave demonstration tube, which consists of loudspeaker, sonic focusing vessel, organic glass and a little liquid driven by the high power DDS signal. The frequency and phase of the highly stabilized signal, which is produced by MCU, DDS, LPF, can be numerically adjusted.

根据驻波形成的原理及其特点，利用MCU，DDS，LPF等产生频率和相位可数控调节、频率稳定性较好的大功率DDS信号源，使用该功率信号驱动由扬声器、声波汇聚器、有机玻璃管和少量液体组成的驻波演示管。

Results whether female or male twins could he discriminated based on the formants in the different frequency ranges, including lower than 2000Hz, 2000Hz-5000Hz and 500lHz-8000Hz. Stability of formants were decreased with the increasing of frequencies and the proportionf of nulli-formants was as higher as 26.67% in the range of 5000Hz-8000Hz.

结果 男性和女性双胞胎个体依据2000Hz以下、2000-5000Hz、5001-8000Hz不同频率范围内的共振峰均可区分，但共振峰的缺峰比例随着频率的升高而升高，5001-8000Hz范围的缺峰比例达26.67%。

The mandate for large gaps between the frequences assigned to carriers means that underlying hardware used with FDM can tolerate a wide range of frequencies 6 句中 mandate for large gaps

译为&大间隔的要求&。译文：在各载波的频率之间的大间隔意味着 FDM 所用的硬件能容纳很宽的频率范围。

The design of the frequency meter can be accurately measured in a frequency of 100MHz between Hz signal.

该设计的频率计能准确的测量频率在1Hz到100MHz之间的信号。

This article in summary frequency measurement principle and in method foundation main introduction based on EDA technology digital frequency meter design and realization process.

本文在简述频率测量原理和方法的基础上主要介绍基于EDA技术的数字频率计的设计与实现过程。

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。