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1)  power spectrum
谱密度,能谱;功率谱,能潜
2)  spectral power density
谱能密度
3)  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 online measuring of the ground surface roughness was estimated by taking into account the power spectrum density of the frictioninduced 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。
4)  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
5)  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。
6)  power spectrum density(PSD)
功率谱密度
1.
With its attacking traffic pattern,obvious difference was found between the power spectrum density(PSD) of legitimate and attack traffic samples.
分析发现,合法流量和包含攻击包流量采样在功率谱密度上存在显著差异。
2.
Directed against the situation of difficult to estimate the vibration fatigue life-span under complex random loading in engineering practice,the estimation of fatigue life-span on the viabrational component parts under random loading has been carried out based on Power Spectrum Density(PSD) function.
针对工程实践中复杂随机载荷下振动疲劳寿命难估算的情况,基于功率谱密度函数(PSD)对随机载荷下的振动构件进行疲劳寿命估算,分别讨论了窄带随机载荷和宽带随机载荷两种情况,方法简单,具有很强的工程实用性。
补充资料:谱密度


谱密度
spectral density

  谱密度[吸碑ctrai de函ty;ene,Tpa二‘H明n加TooeT‘],n维空间中平稳随机过程或齐次随机场的 宽平稳随机过程或宽齐次随机场的协方差函数的E阅der变换(Fouriert侧Lnsform)(见平稳随机过程(stationa巧stochast沁process);齐次随机场(random反ld,h0Inogmeous)).协方差函数的Fourier变换存在的平稳随机过程和齐次随机场称为有谱密度的过程. 设 x(t)二王X*(t)}又一,为一n维平稳随机过程,且设 X(。)一丁。“孟。(d、),,一{,*}:一为其谱表示(中*是对应于多维随机过程X(t)的第k个分量X*(t)的谱测度(speetral心asure)).积分的范围在离散时间t情形为一兀蕊又簇兀,而在连续时间t情形为一co<义<+的.过程x(t)有谱密度 f(又)={fk,‘(又)}戈,,一,,如果其谱测度F二{F*.,}二.‘一:的所有元 F*,,(△)二E。*(△)币又丽,人,z=1,…,。都是绝对连续的,且 F,,(d又) f一以)-一. d又特别地,如果对于过程X(t)(t二O,土1,…),关系式 ,工。!”*,,(‘)l<①,“,‘一’,’一n成立,其中 B(t)二{B*,,(:)}义,,-一{EX*(:+s)I不万}又,,一,是X(t)的协方差函数(eovariancefo刀etion),那么X(t)有谱密度,且 j、*.,(“)一(““)一’,刃二”*,,(r)exP{一‘“‘}, 一兀簇又簇兀,此,l=1,…,”. 对于过程X(t)为连续时间t的情形,情况是类似的.谱密度f(几)有时称为二阶谱密度(seeond一or-der spectral density),以区别于高阶谱密度(见谱半不变量(s pectral~一invariant)). 一齐次n维随机场X(t,,…,t,)有谱密度f(又,,…,之。),如果它的谱分解(spect成res01ution)F(又:,…,又。)具有以下性质:混合导数a”F/刁几:二似。几乎处处存在,记 刁”F f(几:,…,又。)=了了一奋=一, 日又、.‘刁又。且 F(几、,…,又。)= 又1几。 一丁…丁f(。1,一。。,d;1…‘“·+常数· 连口五。.成立.
  
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