查询词典 frequency function

According to induced response method, the expression in frequency domain of pressure response at the end of pipeline is derived using impulse response method and convolution theorem. The expression indicates that that transfer function is only related to the characteristics of pipeline system and the Fourier transform of flow variable only depends on the operating characteristics, and the pressure response in frequency domain is linear with the Fourier transform of flow variable.

基于激励响应法，应用脉冲响应方法和卷积定理得出了管道末端压力响应在频域中的表达式，此式表明：传递函数只与系统的特性相关，流量变量的傅立叶变换只与操作特性相关，且压力频域响应与流量变量的傅立叶变换为线形关系，根据此式在理论上能够得到管道泄漏点的重要信息。

From this experiment, frequency response function could be found, and modal parameter also could be known by curve fitting, then compared with the differences of mode shape and natural frequency by using those modal parameters, also compared with finite element analysis, the results could be applied to detect the structure of beams and prevent it from damage and corrode for the safety in the future.

将实验中三种驱动器搭配加速度计实验分析结果较佳的一组方法，来从事结构之非破坏检测，探讨当固定梁有缺陷产生时，其结构之自然频率与模态振型的变化，并比较其不同缺陷处之固定梁实验模态结果，将来可应用於梁结构物损坏或腐蚀时侦测其安全性之分析。

The system has realized signal generator, signal"s sampling and averaging function, signal"s power spectral density and cross special density analysis, the design and application of digital filter, signal analysis in time, frequency and inverted frequency domain.

实现了波形发生器的设计、信号采集及平均处理、滤波器的设计及应用、信号的时域、频域以及倒频域分析。

As response signal of damped free vibration could be considered as product of the harmonic wave and the unilateral exponential function and the rectangle window, the peak frequency and phase are frequency and phase of the harmonic wave signal is proved in theory in this paper.

针对自由衰减振动信号的连续谱，将其看成无限长谐波信号与单边指数函数及矩形窗的乘积，在理论上证明峰值点的频率和相位就是信号的实际频率和相位。

It's main function includes the registration debarkation system, documentary spreading up with download, the homework ascending to spread, the transmission of video frequency or audio frequency.

它的主要功能包括注册登陆系统、文件的上传和下载、作业上传、视频和音频的传送。

By defining a discriminability function and utilizing some images with synthetic defects, a parameter selection method is proposed to adapt to various fabric types when the Gabor filter bank is applied in defect segmentation. It is argued that only the real part of Gabor filter works during segmentation; the radial orientation can be limited to horizontal and vertical direction; the radial frequency and the length of the FIR filter should depend on the basic frequency of the fabric texture.

本文通过定义分辨力函数，以合成疵点图像为研究对象，提出了在实时应用中对各种不同的纹理图像能快速确定Gabor滤波器组参数的方法：疵点分割中只需用到实Gabor滤波器；方位角只需取水平和垂直方向，径向中心频率和FIR滤波器长度的选取依赖于布面纹理的固有频率。

Based on the Betti-Rayleigh dynamic reciprocal theorem, the reciprocal property of the Green function is demonstrated; and the analytical solution of soil vibration subjected to moving loads is deduced. By means of double Fourier integral transform, the problem is firstly transformed into wave number-frequency domain, which makes it very convenient to derive the solution and furthermore to analyze the frequency characteristics of soil vibration.

基于Betti-Rayleigh动力互易定理，论证了地基土Green函数的互易性，推导了移动荷载引起的地基土振动解析解，进而推证出移动常力荷载和移动简谐荷载作用下地基于表面振动在波数－频率域内和空间－时间域内的解析表达式，并采用Matlab对其进行数值计算。

The paper presents an account of selection of frequency changer used for feeding pump of dense medium cyclone , effect of function of the frequency changer and the problems identified in its application.

介绍了重介质旋流器给料泵变频器的选择、控制功能的实现以及应用中的几个问题，说明了变频调速技术的优势和应用潜

And the frequency response function curve and preceding 10 modes frequency are obtained.

得到频响函数曲线及前10阶模态频率。

Generally, the nonlinear frequency control theory is studied by the method of the generalized frequency response function.

本文利用广义频率响应函数的方法，研究了非线性控制系统的频域理论。

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。