查询词典 spectral density

Then they were imported to MATLAB and calculated to obtain the power spectral density.

将数字声波信号导入MATLAB软件进行处理，得到其功率谱密度图。

Power spectral density and the filtering behavior of vector transformation are analyzed theoretically.

理论分析了功率谱密度和向量变换的滤波思想。

Power spectral density in wavefront measurement of optical components.

关于光学元件波面测量的功率谱密度。

The article based on practical problems finds two ways:point operation of an image and power spectral density function .

本文的研究工作从实际出发，通过对雷达图像的长期观察，总结出规律，然后根据规律找到两种过滤地物杂波的新方法：图像的点运算和图像的功率谱密度函数法。

Based on the impact information from loose part, the power spectral density was created by time-frequency transformation.

4本文提出了利用神经网络理论和模式识别理论，实现对松动件质量估计的数学模型。

The method using HHT to estimate local spectral density is proposed.

本文给出了利用HHT估计地震地面运动局部谱密度的方法。

White noise is ideal signal, its power spectral density is constant.

白噪声是一种理想的信号，该信号具有功率谱密度为一常数，是测试地震计频率特性的一种理想信号。

These results can be turned into terms of spectral density and Weibull probability distribution. All the analysis results can be used in design and analysis of deepwater mooring system.

在对各种时历结果进行处理后，可得到各种结果的谱密度和Weibull概率分布，为深海系泊系统的设计和分析提供参考。

Aiming at the power spectral density function of Clough-Penzien model, value of peak ratio of ground motion in simulation is suggested.

针对Clough-Penzien功率谱密度函数，建议了模拟多点地震动的峰值因子的取值。

Dynamic reliability under Littlewood-Paley wavelet is the biggest, dynamic reliability under modified meyerwavelet and harmonic wavelet are close. Analyzing the dynamic reliability of structure under odd exponent wavelet is very simple, it doesn't calculate Power Spectral Density function integral, it is only to calculate the square of displacement standard deviation and the square of velocity, then the dynamic reliability of structure can be concluded by max distribution. In addition the effects of upper limit is considered, when upper limit is smaller, the dynamic reliability of structure is less, that is, the damage possibility is bigger.

通过结构地震反应在小波基下的动力可靠性分析说明：无论是单自由度还是多自由度从理论上推导在这四种小波下的结构动力可靠性是可行的，而且考虑的结构地震反应都是非平稳的高斯过程，方法实现也比较容易；在Littlewood—Paley小波基下求得的结构的动力可靠度比较大，由改造的meyer小波和谐波小波求得的动力可靠度略有差异；单边指数小波下的结构动力可靠性分析非常简单，不用求功率谱函数来积分，只需求得结构地震反应的位移方差，速度方差，利用最大值分布公式就可得到结构的动力可靠时程；另外也考虑了超越界限对结构动力可靠度的影响，超越界限越小，结构的动力可靠度越小，即破坏概率越大。

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％。