频率响应

The time-domain response of the induced currents on a scattering object irradiated by a plane wave with a Gaussian pulse in time is expanded as an associate Hermite series in this paper. Using the isomorphism of the associate Hermite function and its Fourier transform, the frequency-domain information can be obtained similarly to the time-domain expansion. According to the corresponding relation between time-domain analysis and frequency-domain analysis, and using the early-time response and the low-frequency information of the induced currents, the non-known coefficients in the expansion series can be decided. The entire responses of the induced currents on the scattering object in both time and frequency domains can be obtained at one time by simultaneous extrapolation computation using both the early-time response and the low-frequency information of the induced currents.

摘要首先根据散射体在高斯脉冲平面波激励下感应电流的能量几乎全部集中在时间轴和频率轴上的有限范围内，该文将时域响应展开为系数待定的连带Hermite级数的叠加，并根据连带Hermite函数的傅里叶变换的自反性，得到与时域响应形式类似的频域响应；然后利用时域方法和频域方法分别计算散射体上感应电流的早时响应和低频信息；最后经过时域和频域联合外推计算，由早时响应和低频信息确定时域和频域响应的待定系数，从而获得了整个时域和频域的完全响应。

By studying,we could know structural response of building to blasting seismic wave is not only relative to intensity of blasting vibration, but also to seismic frequency and characteristic of buliding and groundsill,so we should treat in different ways in practise because of difference made by blasting seismic wave to different structural types.

最后围绕爆破地震波的三要素通过建立理想的建筑模型对建筑物的结构响应进行了理论分析，通过分析得出，建筑物对爆破地震波的响应除了与震动强度有密切关系外，还与地震波频率、建筑物的尺寸、地基土的特性以及结构的累积损伤等有很大关系，而且对于不同类型的建筑物，其结构响应差异还较大，因此在工程施工中需要分别对待。

Firstly, based on the Duhamel integral and dynamic reciprocity theorem, the generalized Duhamel integral expression is written to a point in the half infinity space under moving load. Secondly, the train load is considered as a series of centralized loads with fixed distance. The dynamic response expression of a point in frequency domain and frequencywavenumber domain are derived out through the Floquet transform and Fourier transform under a moving load, and then the dynamic response of a point is gotten ...

以Duhamel积分为基础，首先应用动力互等定理，得到了移动荷载作用下，半无限大弹性连续介质空间上任意点的动力响应的广义Duhamel积分表达式；然后将列车荷载简化考虑为一系列具有一定间距的集中荷载，采用Floquet变换、Fourier变换等方法，得到了一个集中移动荷载作用下任意拾振点ξ的动力响应在频域和频率波数域内的表达式，进而由叠加原理得到列车荷载作用下的动力响应解；最后，通过算例说明该算法的适用性。

The fact is provided by simulation that, when the excitation frequency is close to the 3-times superharmonic resonance frequency, the system response consisted of principal response and 3-times superharmonic resonance is stable and periodic.

在出现3倍超谐共振的频率附近，系统的响应为主振动响应与3倍超谐振动响应共同组成的稳定的周期振动。

And these may be used to avoid sympathetic vibration on marine structures. Non-linear water wave dynamics and its engineering application become one of the frontier research fields drawing great attention recently.

利用高阶波理论可以计算得到结构物的高阶运动响应谱，则可以知道各阶频率对应的运动响应，对于研究船舶或海洋平台结构物在波浪中的各种运动响应以及避免共振等问题有简便之处。

Under identical amplitude, when the inherent frequencies equal to the load's frequencies for the structure begin to sympathetic vibration, different point has different displacement which represent under the same frequency ,different point has different values.

在管道结构上不同点，相同的固有频率处对激励的响应值是不同的；在管道结构上的同一点上，不同的固有频率处对激励的响应值也是不同的。来源：06c6Aa2BC论文网www.abclunwen.com

N this paper.a method for calculating the natural frequency and eigenmode of power turbine's tower.the wind effect and displacement response of the tower along wind direction. and the wind effect and displacement response produced by the tail vortex across wind direction is introduced. The response caused by wind turbine's rotation is discussed.

阐述了风力机塔架的固有频率和固有振型、顺风向下塔架的风效应和位移响应、横风向塔架在尾涡激励下的风效应和位移响应以及由风轮旋转而引起的位移响应。

Using triple integral equation based on scalar Green function for forward modeling transient electromagnetic response to a 3 D anomalous body, a frequency response of electromagnetic field component has been evaluated first on frequency domain, then the evaluated results has been transformed into time domain by using fast numeric filtering algorithm.

用基于张量格林函数的体积分方程对三维异常体进行瞬变电磁响应的正演模拟，首先在频率域内计算电磁场分量的频率域响应；然后利用快速数字滤波技术将计算结果转换到时间域。

Aiming at the dynamic performance of frequency tracker designed specifically for laser Doppler velocimeter, the analysis was accomplished and some results of the experiments are presented.

针对激光多普勒测速仪常用信号处理设备———频率跟踪器，采用实验方法分析了其动态响应特性及影响因素，发现其动态响应参数并不能全面反映其在实际测试中的动态响应能力，实际测试中的动态响应能力明显低于通常的估计。

The proposed algorithm can deal with Carrier Frequency Offset and Sampling Frequency Offset estimation with the presence of frequency dependent In-phase and Quadrature-phased imbalance. Then frequency dependent I/Q imbalance and channel response are jointly estimated.

该联合估计算法能在存在频率相关性I/Q失配的情形下准确获得载波频率偏差和采样频率偏差的估计，并获得频率相关性I/Q失配和信道冲击响应的联合估计信息。

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。