方法：相关计算和功率谱分析法。
功率谱分析是机械故障诊断技术中精密诊断的常用方法。
Power Spectrum Analysis is a common method for precise detection in mechanical fault diagnosis.
作包络功率谱分析，能有效地对齿轮箱故障进行诊断分析。
It is an effective and reliable method to analyze signals and diagnose gearbox by Hilbert power spectrum analysis.
利用功率谱分析噪声信号的特性，利用相干性确定噪声源。
用功率谱分析方法分析了在路面激励下柔性模型的振动特性。
The random vibration characteristic of the flexible model is simulated by using PSD method.
再结合传统的功率谱分析方法讨论了水分条件的年际周期变化。
The dry-wet cycle and the climatic accident of the water content in year's periods are revealed.
根据功率谱分析，入海泥沙还存在着3年和10年左右的周期性波动。
According to the spectrum analysis, the sediment load also fluctuated at the periodicity of 3a and 10a.
脑电信号的功率谱分析结果显示了接触组与对照组在一些指标上有差异。
Many indices of EEG power spectrum were different between the exposed group and control group.
介绍了数据回放、数据预处理、数据统计分析、频谱分析和功率谱分析。
Having introduced the data returns put, data pre-processing and data statistical analysis, spectrum analysis and power spectrum analysis.
肺音分析采用了时域分析、功率谱分析、时变谱分析、同态处理等多种分析算法。
The lung sounds data analysis USES time domain analysis, frequency domain analysis, power spectra analysis, time-varying spectra analysis and so on.
本文采用功率谱分析法讨论了作用在三轴汽车平衡悬挂承载部件上的动载荷问题。
By means of spectral analysis method, the problem of dynamic loads acting on the load-carring components of rear bogie suspension system of a truck is analysed in this paper.
通过功率谱分析，研究了偏心力作用下的功率流特性，并探讨了主动控制策略的效果。
The characteristics of power flow are studied by analyzing the power flow spectra. The effects of the active control are discussed.
用心率功率谱分析方法观察了不同频率电刺激大鼠躯体神经对心率及血压的影响机理。
The effects of electrical stimulations to madian and sciatic nerves on heart rate (HR) and blood pressure (BP)were studied with HR power spectral method.
本文扼要叙述了用于离散时程数据的功率谱分析的自相关回归法（ARM）的数学过程。
This paper briefly introduces the mathematical processing of ARM used in power spectral analysis of discrete time-histories data and confirms the usalitity of ARM in earthquake engineering.
通过对颗粒碰撞压力时间序列的功率谱分析和混沌分析，研究了其频域特性和混沌特征。
To understand the frequency and chaotic characteristics of the particle colliding force, the time series of particle colliding force are analyzed by power spectrum analysis and chaotic theory.
在信号处理中，传统的功率谱分析方法包含的信息量少，谱相关方法较前者具有更多优点。
In signal processing field, the spectrum correlative technology has more advantages than the conventional power spectrum method, because the latter includes less information.
后者的功率谱分析显示出存在着明显的11和22年振动，且和太阳活动相应的周期很好地耦合。
The power spectrum analyses of the subtropical high indexes reveal a significant 11- and 22- years cycle, coupling well with the same cycle of slar activity.
采用滤波法进行功率谱分析，不存在数据截断带来的误差，还可方便地用于等百分比带宽的谱分析。
But the filter method avoids the error caused by truncated data and it can achieve the analysis of a fixed percentage bandwidth easily.
在时变功率谱分析中发现，蚱蝉功率谱的某些成分有显著的变化，可作为蝉类间信息传递的一种方式。
Analysis of power spectrum for cicada's song, and it is a possible way for cicadas transfering their information.
功率谱分析显示ENSO的冷事件和暖事件有三个共同的明显周期，即18个月、26个月和47个月；
Through power spectrum analysis, there are three obvious common periods, 18 months, 26 months and 47 months, for ENSO events.
文中介绍了基于数字滤波的低频随机信号实时功率谱分析仪的实现方法，并给出了实时算法的设计要点。
In this paper, a real time power spectrum analyzer of low frequency random signal based on digital filters is introduced, and a design method of real time arithmetic is given.
应用功率谱分析、R/S分析、 混沌分析等对气固流化床压力波动信号的性质、组成进行了定量解剖。
The properties and components of pressure fluctuation signals in gas solid fluidized bed was dissected quantitatively by using power spectrum analysis, R/S analysis and chaos analysis.
通过对涡轮喷气及涡轮风扇发动机试车噪声的采集和声功率谱分析，讨论发动机的主要噪声源和噪声的特征。
Through noise data collection and power spectrum analysis of turbojet and turbofan, the main noise source and characteristics of noise are discussed.
动态特性信号分析主要功能包括信号采集、统计分析、时域分析、自相关分析、频谱分析、自功率谱分析等。
It mainly includes signal acquisition, statistical analysis, time domain analysis, autocorrelation analysis, spectrum analysis, self-power spectrum analysis, etc.
在槽型优选测试系统实验的基础上，我们引入了信号分析工具——功率谱分析，作为评估槽型优劣的一个标准。
Based on the groove testing system, we induced the spectral analysis which is the signal analysis tool into evaluating the grooves, and used it as an evaluating standard.
空化噪声的谱分析一般采用功率谱分析，而功率谱分析在研究空化噪声这种具有很强突变性的信号具有明显的缺陷。
Power spectrum analysis is always used in spectrum analysis of cavitation noise. However, it is obviously unfit for research on the transient signal such as cavitation noise.
作为对照，用自相关功率谱分析检测短周期项的理论值序列和BIH的世界时序列，都得到了显著的短周期项功率谱。
In contrast with this result, the same analyses of both the theoretical series of tidal terms and the, BIH series of UT demonstrafe the notable power spectrum of the short-period terms.
但目前心率变异性信号的分析法主要是功率谱分析法，复杂性分析法不多，而麻醉期HRV信号的复杂性分析则更少。
However, presently the main analyzing methods of HRV are spectral analysis, while complexity analysis of HRV is less, and complexity analysis of HRV signal during anaesthesia is much more less.
但目前心率变异性信号的分析法主要是功率谱分析法，复杂性分析法不多，而麻醉期HRV信号的复杂性分析则更少。
However, presently the main analyzing methods of HRV are spectral analysis, while complexity analysis of HRV is less, and complexity analysis of HRV signal during anaesthesia is much more less.
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