Power spectral density is an effective tool to evaluate random vibration in circulation environment.

功率谱密度是评价流通环境过程中随机振动的有效工具。

In practical application, one of the difficulties is the adjustment of the power spectral density function to various soil conditions.

在实际应用中，调整功率谱密度函数以适应各类场地土仍是一项困难的工作。

In this paper, based on the random characteristic analysis of Tianjin Hospital Earthquake waves of Tangshan aftershock Three dimension acceleration power spectral density ratio have been presented.

根据唐山余震时天津医院实测地震波的随机特性分析，提出了地面运动加速度三向功率谱密度的建议比值。

The random rail roughness samples are yielded using random numerical method and power spectral density function.

采用随机数值模拟方法和功率谱密度函数生成随机轨道粗糙度。

Based on the calculation of power spectral density of wavefront, the method of using PSD to evaluate the corrective ability of active thin primary mirror was proposed.

在分析波前功率谱密度（PSD）计算方法的基础上，提出了采用PSD评价能动薄主镜波前校正能力的方法，并给出了仿真结果。

Different types of digitally modulated signals that have similar, if not identical, power spectral density functions can have highly distinct spectral correlation functions.

一些不同的数字调制信号有着相同或相近的功率谱密度，但它们的谱相关函数却有明显区别。

In this paper, a random response analytical method, Power Spectral Density Method, for better estimation of sonic fatigue life is proposed.

为此，本文提出所谓功率谱密度法，完成了声疲劳寿命估算的随机响应分析。

The calculation results using simulated and measured irregularity indicate that the power spectral density function and the simulated method used here can reflect true condition of rail.

同时，采用模拟与实测两种不平顺样本的计算结果表明，本文采用功率谱密度函数的模拟方法可以基本反映轨道的实际不平顺情况。

The experimental results of the different aperture parameters and the power spectral density of wavefront slope are derived in the paper.

本文推导了采用不同孔径参数的实验结果，以及波前斜率的功率谱密度。

It is shown that the surface topography characteristics can be adequately described by the power spectral density (PSD) of the surface roughness.

研究表明，表面的拓扑特征可以用表面粗糙度的功率谱密度（PSD）来加以描述；

The power spectral density function of earthquake motion is usually used for the random response analysis of engineering structures in the frequency domain.

工程结构的随机地震反应分析，常在频域中用到地震动的功率谱密度函数。

This paper deals with stochastic characteristic of the wind speed, and gives an auto-regressive moving-average (ARMA) model for wind speed subjected to particular power spectral density.

该文针对风速随机变化的特性，在风速统计特性研究的基础上，用自回归滑动平均（ARMA）方法建立了具有一定功率谱密度特性的风速模型。

A high degree of relationship was found between the power spectral density and thermal response index (TRI).

功率谱密度值与时域指标体温反应指数（TRI）有极好的相关性。

Road irregularity, as a stationary stochastic process, is generally illustrated by power spectral density (PSD) in frequency domain.

道路随机过程通用的描述方法为频域的功率谱密度函数方法。

The correlation between the standard classified road power spectral density(PSD) and international roughness index(IRI) was discussed by using regressive analysis.

通过回归分析的方法对标准分级道路功率谱密度与相应国际平整度指数之间的关系进行了研究。

But if above positive real condition is satisfied only within some frequency range, the convergence of FXLMS algorithm is dependent on the spreading of power spectral density of the reference signal.

若上述正实条件仅在某些频带上满足，则FXLMS算法的收敛将依赖于参考信号功率谱密度的分布。

The wavefront power spectral density(PSD) is being adopted for specifying the large optical component employed in high power density solid-state laser for inertial confinement fusion(ICF).

波前功率谱密度（PSD）被用于评价惯性约束聚变（ICF）激光驱动器光学元件中频段的波前误差。

Firstly, the power spectral density function of refractive index is given including the effects of inner and outer scale of the turbulence.

首先，给出了包含大气湍流内，外尺度效应的折射率功率谱密度函数。

The concept of "equivalent noisy power spectral density" is introduced in this paper.

文中提出等效噪声功率谱密度的概念。

The wavefront power spectral density (PSD) is being adopted for specifying the large optical components employed in high power density solid state laser for inertial confinement fusion (ICF).

波前功率谱密度（PSD）被用于评价ICF激光驱动器光学元件在中频区域的波前误差。

The power spectral density of ship's motion is calculated based on ocean wave energy spectrum, and the movement spectrums of the ship's random motion are calculated and created.

根据海浪波能谱，计算了舰船摇荡运动的功率谱密度和舰船的随机摇荡运动。

A novel method was proposed based on the total pressure of pitot tube and power spectral density.

通过分析皮托管动压信号的方式，提出了一种基于功率谱密度分布的调节阀扰动信号分析新方法。

The basic theory of power spectral density was introduced.

阐述了功率谱密度的基本理论、如何获得功率谱密度；

When a white noise interferes with the rotary disc system, a time series model and the power spectral density are put forward for determining the dynamic parameters of the real system.

提出用时间序列模型和功率谱密度，来确定实际系统的动态参数。

In this paper, the power spectral density of the wind speed which varies with height is given according to the field measurement of typhoon in Shanghai area.

文章根据上海地区台风的实测资料，提出了沿高度变化的风速功率谱密度，并应用随机振动理论，计算了上海电视塔在台风作用下的风致响应，取得了与实测值较为符合的结果。