功率谱密度的英文

• power spectral density (psd)
• psd ( power spectral density )
• psd power spectral density
• psd，power spectrum density
• spectral density

• 功率谱    power spectrum
• 密度    density; thickness
• 互功率谱密度    cross-spectral density
• 自功率谱密度    auto-spectral density
• 功率谱密度函数    power spectral density function; power spectrum density function
• 瞬间功率谱密度    instantaneous power spectral density
• 速度功率谱密度    velocity power spectral density
• 噪声功率谱密度    noise power spectral density
• 噪音功率谱密度    noise-power spectral density
• 功率谱密    power spectral density; power spectrum
• 相位噪声功率谱密度    phase noise power spectrum density
• 功率频谱密度电平    power spectral density level
• 功率频谱密度分析    power spectral density analysis
• 功率频谱密度函数    power spectral density function
• 功率通量谱密度    spectral power flux density
• 噪声功率频谱密度    noise spectral power density
• 最大功率频谱密度    maximum spectral power density
• 谱密度    ectral de ity; spectral density; spectraldensity; spectrum density
• 层面功率谱    bedding-plane power ectrum; bedding-plane power spectrum
• 二维功率谱    two-dimensional power spectrum
• 功率谱的    power-spectral
• 功率谱分析    power spectral analysis; power spectrumanalysis
• 功率谱估计    power spectrum estimate; power spectrum estimation
• 功率谱显示    power spectra display; powspec
• 功率谱阵    power spectrum array

• We acquired the system ' s dynamic response when the satellite attitude was adjusted and the mode of the antenna . then modal analysis and dynamic analysis have been done to the satellite - antenna system by using the finite element analysis ( fea ) software of ansys . through the analysis we got the system ' s connatural characteristic , the amplitude - frequency characteristic of harmonic response , the power spectrum density of random vibration response , the maximal amplitude and resuming time of impact response
  其次借助ansys有限元分析软件，对系统进行了模态分析和动力学响应分析，获得了不同天线结构参数下的卫星?天线系统的固有特性，简谐响应的幅频特性，随机振动响应的功率谱密度，以及冲击响应的最大幅值和恢复时间等。
• The clutter modeling is the most important process during the simulation , so in the third chapter , the coherent clutter modeling is separately discussed and the simulation results are presented in the following . after that , the probability density characteristics and the spectral density characteristics of the generated clutter data are analyzed
  由于在回波信号模拟过程中,杂波的建模是最重要的一个环节,因此在第三章中将单独对相关杂波的建模进行详细介绍,并给出相关杂波的仿真结果,同时对产生的杂波数据进行概率密度和功率谱密度的统计分析。
• In the paper , firstly , present the formulation and application of proper orthogonal decomposition of covariance and cross - power spectral density matrices are presented in the analysis of wind load effects on structures . then the dynamic response of linear structures subjected to random loads is analyzed by a technique called double modal transformation ( dmt ) that is expressed through a double series whose terms depend on structural and loading modes
  本论文中首先通过求相关矩阵和互功率谱密度矩阵特征值问题给出了本征正交分解的公式，并利用pod与结构模态相结合的双模态方法来分析结构的动态响应，主要讨论了截断高阶荷载模态对风致响应的影响。
• Then we introduce pulse position modulation ( ppm ) using pn code and analysis its multi - access performance , system capacity and power spectrum density . on the basis of those analyses , we study the pulse shape and the anti - jamming ability of the system . at last , multiple access with pseudochaotic time hopping is introduce
  本文首先阐述了uwb脉冲通信系统的基本原理，重点介绍了用伪随机码跳时的ppm (脉冲位置调制)调制，分析了他的多址性能、系统容量和功率谱密度，在此基础上研究了改进性能的发射信号形状和系统抗干扰能力，最后介绍了伪混沌码跳时的多址方式。
• In the paper , the esd stressing tests for n - channel mosfets are performed , and main electrical parameters , 1 / f noise spectrum and its time series are monitored during the test . it is found that the 1 / f noise changes much more sensitive to the esd latent damage than the electrical parameters , at the same time , similarity coefficient also changes more quickly especially for smaller w / l devices
  通过对mos器件的静电应力试验，同时监测试验过程中器件的电参数、 1 / f噪声功率谱密度以及由1 / f噪声的时间序列提取的相似系数变化，发现1 / f噪声对于静电应力引起的损伤要比电参数的变化敏感得多。
• Since the effects of turbulent atmosphere is prominent , this thesis concentrates on the effects of the turbulent atmosphere on the laser beam propagation in the atmosphere . the atmosphere refractive index model , especially refractive index fluctuation , power spectrum , phase spatial structure constant are introduced in the following and the specific structure function is achieved
  根据大气折射率模型，以及折射率起伏功率谱密度和相位空间结构常数，得到具体的结构函数；通过长程情况下的马尔科夫近似，得到了互相关函数，对数振幅和相位协方差函数。
• Moreover , close - form expressions for the power spectral density and acpr of cdma signal passed through a nonlinear power amplifier are derived using the power series and statistical model of cdma signal . the comparison computer between algorithm simulation and practical data or experimental data derived using ads proves the validity
  同时基于cdma信号的时域数学模型和功率放大器的幂级数模型,具体推导出cdma信号的功率谱密度和acpr的数学表达式,并将其算法仿真结果与实测结果以及ads实验仿真结果相比较,验证其正确性。
• In the first session the fans vibration on - line monitoring system is realized with vc language , also compile auto power spectrum density function , cross power spectrum density function , autocorrelation function and cross correlation function etc spectral analysis function to carry through simple offline fault diagnosis
  首先用稳定性强、扩展性好的vc + +语言开发了通风机振动在线监测系统，并编写了自功率谱密度函数、互功率谱密度函数、自相关函数和互相关函数等频谱分析函数来进行简单的离线故障诊断。
• To study the periodical electromagnetic pulses with random timing jitter radiated by electromagnetic pulse transmitters , the psd ( power spectral density ) of periodical electromagnetic pulses with random timing jitter was obtained based on the analysis of the - function of the psd of timing jitter
  摘要针对工程实践中电磁脉冲发射机辐射的随机时间抖动周期性电磁脉冲信号，在分析随机时间抖动周期-函数功率谱密度的基础上，得出了随机时间抖动周期性电磁脉冲串的功率谱密度。
• By theory and practice simulation , the several types of constant envelope modulation techniques are analyzed and compared , including theirs modulation principle , phase path , the modulated wave envelope , power spectrums , error bit rate and the influence of its power spectrums of the band - limited and non - linear , etc . especially we have researched the ijf - oqpsk modulation technique , and the performance of its inter - symbol interference and time jitter free , and its strongly resisting of spectral spreading
  结合理论和实验仿真结果，分析讨论了卫星通信中的各种恒包络调制技术，对它们的调制原理，相位路径，已调波包络，功率谱密度，误码性能，以及带限非线性信道对其功率谱的影响等方面都作了研究和比较。特别研究了ijf ? oqpsk在消除码间干扰和定时抖动方面的性能及其优良的旁瓣特性和抑制频谱扩展特性。

• 功率谱密度的日语：パワースペクトル密度 パワースペクトルみつど