1)pavement power spectral density路面功率谱密度
2)PSDF of the road surface路面功率谱密度函数
3)areal power spectral density面域功率谱密度
4)power spectrum density功率谱密度
1.TAM method of analyzing power spectrum density of heavy-tailed ON/OFF Source;分析重尾ON/OFF源功率谱密度的TAM近似法
2.In this system,the characteristics of monitoring signals are extracted by the method of power spectrum density maximum(PSM),and least square support vector machine(LS-SVM) is proposed to detect damages.基于被动监测技术的局限性,搭建了损伤主动监测系统,对监测信号进行了功率谱密度最大值(PSM)特征提取,并提出了一种基于最小二乘支持向量机(LS-SVM)的损伤检测方法。
3.The online measuring of the ground surface roughness was estimated by taking into account the power spectrum density of the frictioninduced acoustic emission.利用摩擦产生的声发射(AE)信号的功率谱密度对磨削表面粗糙度进行在线评价。
英文短句/例句
1.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。
2.Damage Detection of Steel Bridge Based on Acceleration Power Spectral Density加速度功率谱密度在钢桥损伤检测中的应用
3.Simulation of Multi-state Digital Baseband Signal's Power Spectral Density多进制基带信号功率谱密度的仿真分析
4.Comparison of Ultra-Precision Machined Surface Roughness Measurement Methods and Power Spectral Density Characterization超精密加工表面粗糙度测量方法对比及功率谱密度评价
5.Floor response spectra analysis of base-isolated structure based on PSDF隔震结构基于功率谱密度函数法的楼层反应谱分析
6.Algorithm of Artificial Time Histories Meeting Requirements of Both Fitting of Response Spectrum and Envelop of Power Spectral Density同时满足反应谱匹配和功率谱密度包络要求的人工时程生成算法
7.Characterization of Ultraprecision Machined Surfaces Using Spectral Density and Fractal Analysis;超精密加工表面的功率谱密度与分形表征技术研究
8.The Application of Theory of Acceleration Power Spectral Density for Structure Damage Detection加速度功率谱密度理论在结构损伤检测中的应用
9.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。
10.Power spectral density method of defects on optical elements of high-power laser facility and its equivalent algorithm高功率固体激光装置光学元件“缺陷”分布的功率谱密度方法及等效求法
11.Floor Response Spectra Analysis of Nuclear Reactor Buildings with Additional Base-Isolation Measures Based on PSDF基于功率谱密度函数法的核电厂房增加隔震措施后的楼层反应谱分析
12.double frequency spectral density functio双重频率谱密度函数
13.Fingerprint Key Generation Algorithm Based on Frequency Spectrum Texture Analysis基于功率谱纹理分析的指纹密钥算法
14.A method of 2228 litho-density tool's calibration first success ratio2228岩性密度仪刻度一次成功率的技巧
15.Influence of Window Function on The Estimation Precision of Traditional Power Spectrum窗函数对传统功率谱估计精度的影响
16.spectral density谱线[频谱，光谱]密度
17."Copper sheathed, tin coated low watt density elements easily replaceable."镀锌铜壳低功率密度加热棒,更换容易。
18.power measuring assembly based on neutron flux density中子通量密度法功率测量装置
相关短句/例句
PSDF of the road surface路面功率谱密度函数
3)areal power spectral density面域功率谱密度
4)power spectrum density功率谱密度
1.TAM method of analyzing power spectrum density of heavy-tailed ON/OFF Source;分析重尾ON/OFF源功率谱密度的TAM近似法
2.In this system,the characteristics of monitoring signals are extracted by the method of power spectrum density maximum(PSM),and least square support vector machine(LS-SVM) is proposed to detect damages.基于被动监测技术的局限性,搭建了损伤主动监测系统,对监测信号进行了功率谱密度最大值(PSM)特征提取,并提出了一种基于最小二乘支持向量机(LS-SVM)的损伤检测方法。
3.The online measuring of the ground surface roughness was estimated by taking into account the power spectrum density of the frictioninduced acoustic emission.利用摩擦产生的声发射(AE)信号的功率谱密度对磨削表面粗糙度进行在线评价。
5)power spectral density功率谱密度
1.Study and validation of the relationship between international roughness index and power spectral density;国际平整度指数与路面功率谱密度相关关系研究及验证
2.Specifying surface roughness of optical film substrate using the power spectral density;利用功率谱密度函数表征光学薄膜基底表面粗糙度
3.Power spectral density measurement for large aspheric surfaces;用于大口径非球面的波前功率谱密度检测
6)PSD功率谱密度
1.MATLAB numerical simulation of stationary stochastic porcess based on ISTA PSD;基于ISTA功率谱密度的MATLAB随机过程时域样本再现
2.Pulse Shape of UWB Signals and PSD Analysis;UWB信号波形及功率谱密度的分析
3.The track spectra of Qinhuandao-Shenyang(QS) passenger railway line and German railways were compared in terms of power spectrum density(PSD),amplitude of time domain samples and dynamic performance.从轨道谱的功率谱密度、时间样本幅值及对动力学性能影响的角度,对比了秦沈线轨道谱和德国轨道谱。
延伸阅读
功率谱密度估计 随机信号的功率谱密度用来描述信号的能量特征随频率的变化关系。功率谱密度简称为功率谱，是自相关函数的傅里叶变换。对功率谱密度的估计又称功率谱估计。平稳随机信号x(t)的（自）功率谱Sxx(ω)定义为 (1) 式中rxx(τ)为平稳随机信号的自相关函数。 对于离散情况，功率谱表示为 (2) 式中T为离散随机信号的抽样间隔时间。 当利用随机信号的 N个抽样值来计算其自相关估值时，即可得到功率谱估计为 (3) 可见，随机信号的功率谱与自相关函数互为傅里叶变换的关系，这两个函数分别从频率域和时间域来表征随机信号的基本特征。按上式计算功率谱估值，其运算量往往很大，通常采用快速傅里叶变换算法，以减少运算次数。 计算信号功率谱的方法可以分为两类：一为线性估计方法，有自相关估计、自协方差法及周期图法等。另一类为非线性估计方法，有最大似然法、最大熵法等。线性估计方法是有偏的谱估计方法，谱分辨率随数据长度的增加而提高。非线性估计方法大多是无偏的谱估计方法，可以获得高的谱分辨率。 参考书目 何振亚：《数字信号处理的理论与应用》，人民邮电出版社，北京，1983。 A. V. Oppenheim, R. W. Schafer, Digital Signal Processing Prentice-Hall, Inc., Englewood Cliffs,New Jersey,1975.
