片语

noise spectral power density噪声功率频谱密度

spectral flux densityIn spectroscopy, spectral flux density is the quantity that describes the rate at which energy is transferred by electromagnetic radiation through a real or virtual surface, per unit surface area and per unit wavelength. It is a radiometric measure, as distinct from measures that characterize light in terms of the electromagnetic field or photon

spectral l density谱密度

spectral correlation density function谱相关密度函数

spectral amplitude density振幅谱密度

spectral source density光谱源密度

Maximum spectral power density最大发射功率

spectral dye density光谱染色密度

英汉例句

• 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。

• 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。

• this paper derived the recursive formula of autocovariance function and a three-stage algorithm of computing spectral density of mar model, thus we solved spectral analysis problem of mar model.

  针对mar模型导出其自协方差函数的递推关系式及计算谱密度的算法，从而从理论上解决了这一模型的谱分析问题。

• 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。

• a method for describing heterogeneous media and fractional brownian motion are introduced. the spectral density function of fractional brownian motion is used to simulate the heterogeneous media.

  介绍了非均匀介质的描述方法与分数布朗运动，并用分数布朗运动的谱密度函数模拟非均匀介质。

• the matrix of power spectral density function of fluctuating wind load is established first.

  首先建立了脉动风荷载的功率谱密度函数矩阵。

• this paper presents a fourier transform pair of a stagger-lag autocorrelation function and its power spectral density (psd).

  本文提出了参差滞差的自相关函数和它的功率谱密度的富里叶变换对；

• therefore, we present a new method to generate anisotropic fractals based on spectral synthesis method. it gets anisotropic fractals by specifying the spectral density of the terrain surface.

  为此，本文基于频谱合成法，提出并实现了一种生成各向异性分形地形的新方法，该方法通过指定分形曲面谱密度来实现分形的各向异性。

• 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。

• the calculation of spectral density for a class of digital angle-modulated signal vsith equal priori probabilities is presented.

  本文介绍一类先验等概的数字调角信号的功率谱密度的计算。

• 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。

• the methods of computation and realization of signal power spectral density are mainly discussed.

  文中主要描述了信号功率谱的计算和实现方法。

• the bridge deck is assumed to be good and the road surface is generated from power spectral density function.

  假定桥面等级为好，并采用功率谱密度函数进行随机过程模拟。

• power spectral density (psd) is widely used to analysis the stationary time series. manyproblems of classical spectral analysis have been solved with the development of modern spectral analysis.

  功率谱密度被广泛地应用于分析平稳时间序列，随着现代谱分析技术的发展，经典谱分析技术的缺点得到解决。

• 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。

• 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 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。

• 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 calculation of the spectral density of non-linear wave forces is presented in detail, based on linearized approach and polynomial-approximated approach, respectively.

  该文详细介绍了采用线性化法和多项式逼近法求解非线性波浪力谱密度的过程。

• 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 average spectral density functions under mas condition were derived from various models of jump motion and models of freely diffusive motion.

  根据不同的跃迁运动和自由扩散运动模型导出了魔角旋转条件下的平均谱密度函数。

• 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。

• the results show that acoustic response feature of random vibration depends on the acoustic response function and the spectral density function of the stimulating load.

  理论推导和实例结果表明，随机振动的声学响应特性取决于声学频率响应函数和激励谱密度函数。

• the experimental results of semiconductor lasers about the relations between low-frequency noise spectral density and reliability of devices are reported in this paper.

  本文给出了半导体激光器的低频电噪声谱密度和器件可靠性关系的实验结果。