查询词典 spectral analysis

Spectroscopy and Spectral Analysis, to be published 2003.

常介质阻挡放电等离子体的光谱诊断及其在材料表面改性中的应用研究。

Empirical mode decomposition based spectral analysis of heart rate variability.

基于经验模态分解的心率变异性谱分析研究。

Fractal dimension ; Grey system ; Log data ; Power spectral analysis ; Normal distribution

分维；灰色理论；测井数据；功率谱分析；正态分布

Therefore it can perform localized cross spectral analysis to measure phase shifts between each of multiple components of two time series as a function of both time and frequency.

因此可以用局部交叉谱来衡量两个时间序列中多种成分之间的相移，作为时间和频率的函数。

By analyzing the theory of higher order cummulants and higher order spectrum ,the methods of machine fault feature extraction are researched based on higher order spectral analysis by using the character that higher order spectrum can restrain the gauss noise.

在分析高阶累积量与高阶谱的理论基础上，利用高阶谱可以抑制加性高斯噪声的性质，研究了基于高阶谱分析的机械故障特征提取方法，提出了基于双谱估计的齿轮故障诊断的方法。

The application of high order spectral analysis is related to computations of high order moment functions and multi-dimensional Fourier transforms. The errors appear in these computations and limitation of measured data may cause the failure of such comparison.

高阶谱分析方法的应用中要涉及到高阶谱矩、高阶相关函数及高维傅立叶变换的计算，这些计算所带来的近似及试验记录的局限性很可能是导致两种方法比较时不成功的原因。

In order to use spectral analysis theory to calculate s econd-order wave forces which naval architectures suffered in the random sea wa ves, the second-order wave forces which naval architectures suffered in any one regular wave or any two regular waves should be calculated firstly.

为了采用谱分析方法预报海洋结构物和船舶在随机海浪中所受的二阶波浪力，必须先求得海洋结构物和船舶在任意单色波和双色波中受到的二阶波浪力。

The conventional methods used in mapping the depth of temperature approaching to the Curie point are the spectral analysis and equivalent layer model based on geomagnetic data.

传统的居里面深度探测方法包括谱分析方法、等层模型方法和温度－深度剖面法。

First, heart rate variability, blood pressure variability and spontaneous baroreflex sensitivity were analyzed among 89 healthy civil flying personnel by using conventional AR spectral analysis and sequence method respectively.

方法先对 89名健康民航飞行人员的心率变异性与血压变异性的谱分析及压力反射敏感性数据进行主成分分析，再利用多重回归分析得出心血管年龄的估计方程。

The feasibility of constructing a partial least squares model with a parsimonious calibration set for NIR spectral analysis was discussed. Waveband selection was also investigated for improving the predictive ability of the model.

通过标准样品和复杂基质样品共同构建的偏最小二乘模型，考察了波段筛选和建模参数对预测结果的影响。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。