查询词典 spectral density

The inverse fast Fourier transformation was applied to generate road irregularity and its velocity term of grade B according to power spectral density of road roughness.

结果表明：曲线梁桥的位移和内力动力放大系数大于直线梁桥的，且不同位置不同项目的内力和位移之间的动力放大系数的数值差别很大。

Based on VHZ data recorded by 7 stations of China digital seismograph network for Nov. 14, 2001, earthquake in the west of the Kunlun mountain pass, we extracted spherical mode of 0S4-0S76 of the earth free oscillation using power spectral density estimation. Because the frequency response of seismograph in China digital seismograph network suppress information of solid tide, we do not need to remove the solid tide in our procession.

利用中国数字地震台网改造后的7个台站的VHZ波形资料，采用功率谱密度估计方法，利用中国数字地震台网地震仪对低频信号压制的特点，在没有对资料去除固体潮影响的情况下，提取了2001年11月14日昆仑山口西地震激发的0S4-0S76地球球型自由振荡，并与地球初步参考模型的理论自由振荡周期进行对比，结果表明与PREM预测的球型自由振荡周期符合得很好。

China Digital Seismograph Network ; earthquake to the west of the Kunlun mountain pass ; power spectral density estimation ; toroidal free oscillation of the earth

中国数字地震台网；昆仑山口西地震；功率谱密度估计；地球环型自由振荡

Besides, in the analytic process, it also utilizes power spectral density diagram, time frequency analysis diagram and modal stabilization diagram to assist the reach.

分析过程中并以时间历时图、功率频谱密度图、时谱图及模态稳定图来辅助观察分析。

The earthquake ground motion is modeled as a twice filtered Gaussian white noise process, and the parameters of the power spectral density function of the process are determined.

将地震地面运动模拟成两次过滤Gauss白噪声过程，并确定了这一过程的功率谱密度函数的参数。

On the basis of the power spectra of earthquake records, the parameters of the power spectral density function of the twice filtered Gaussian white noise process are determined by adopting the least squares procedure of a nonlinear function.

根据地震记录的功率谱，采用非线性函数的最小二乘法，确定了两次过滤Gauss白噪声过程的功率谱密度函数的参数。

The generalized spectral density and its derivative can be used to capture various specific aspects of serial dependence.

广义谱密度和它的导数还可以被用来检验序列相依的各个方面，例如鞅差，条件同方差性，条件对称性，和条件等峰度性等。

This paper analyzes irrational number series of square root of 2 and e in six aspects involving autocorrelation function,Power Spectral Density,phase space construction,correlation dimension,Principal Component Analysis and maximal Lyapunov exponent.

将已提出的π序列定义和分析方法推广到无理数领域，引出了无理数序列，并以常用的无理数根号2、e为例，对无理数序列的自相关、功率谱、相空间、关联维数、最大Lyapunov指数和主分量等6个方面进行深入分析。

Smaller aggregationsin sound reverberation (20 m) corresponded to the assumed common sizes of macroplankton patches,which are not efficiently caught by Juday nets (Kovalevet al., 1993) and for this reason are not displayed in the spectral density of the plankton field.

较小的主要在声音混响(20米)相对应的macroplankton假定的普通大小的斑块，不是有效的被Juday网(1993)，Kovalevet高庆宇，因为这个原因，并不显示在谱密度的浮游生物领域。

The power spectral density and root mean square of the simulation outputs are computed.

求取了仿真输出的路面不平度时域数据的功率谱和均方根值。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。