power spectral

Power Spectral Entropy of Various Frequency Segments and Its Application to Analysis Electrocardiogram

不同频段功率谱熵及其在心电分析中的应用

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based on priestley's evolutionary power spectral method ( 1967) and the suggestion by lin and yang ( 1983), a mathematical model of non-stationary power spectral of fluctuating wind velocities is proposed.

基于Priestley（1967）演变功率谱模型，并采用Lin和Yang（1983）的建议，建立了脉动风速的非平稳功率谱模型。

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A new statistical model for non-frequency mobilechannel is presented in this paper from the Doppler-Power-Spectral-Density.

本文从多普勒功率谱的角度研究了 非 频率选择性衰落的信道模型.

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Response threshold detection of auditory brainstem response by phase spectral analysis together with power spectral analysis

相位谱结合功率谱分析在听性脑干反应阈值客观自动化测试的应用

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FCG, as a power spectral estimation of electrocardiogram, is a new technique of heart inspection.

频谱心电图（FCG），即心电信号的功率谱估计图，是一种心脏检查新技术。

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Power spectral density measurement for large aspheric surfaces Test& Measurement

用于大口径非球面的波前功率谱密度检测

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The Random Response Analysis in the Structure Sonic Fatigue Life Estimation Power Spectral Density Method

结构声疲劳寿命估算中的随机响应分析&功率谱密度法

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It details core algorithm of the instrument including TDR test, frequency response test, digital tracking filter, power spectral density test, load coil detection, DMT test, voltage test, current test, resistance test and capacitance test.

详细阐述TDR测量、频响测量、数字跟踪滤波、功率谱密度测量、加感线圈检测、DMT测量、电压测量、电流测量、电阻测量、电容测量核心算法。

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Problems easily to be mixed up in randon data processing relevant to motor vehicle ride vibration, such as acceleration power spectral density function, power spectral function and power spectral density function expressed in time frequency f and angular frequency ω, are expounded and deducted in the article.

对汽车平顺性随机数据处理中关于加速度功率谱密度函数与功率谱函数、以时间频率f与圆频率ω表示的功率谱密度函数等易于混淆的问题进行了阐述与推演。

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A study of power spectral analysis of heart rate variability in anxiety neurosis

焦虑症患者心率变异性频谱分析的研究

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Approach to Three Dimension Acceleration power Spectral Density Values of Ground Motions

地面运动加速度三向功率谱密度函数值的探讨

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By computing the power spectral density and defining a measure parameter, we show that under certain temperature, action potential reach a maximum, which corresponding to the coherence resonance.

通过计算功率谱以及由功率谱定义的β因子，很清楚地看到β在某些温度时达到了最大值，产生了相干共振。

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The application of the single-ground-motion analysis method shall meet the requirements of envelop of the power spectral density as well as fitting of the target response spectrum.

采用单组人工时程分析法不仅需要匹配目标反应谱，而且要满足功率谱密度的包络要求。

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Establishing the dynamic performance simulation of high-speed train track random irregularity excitation model by taking the PSD ( Power Spectral Density), the change law of wheel/ rail vertical and horizontal force with curve radius value in less super high and super high state is obtained.

将德国高干扰谱用于高速动车动态性能仿真建立的轨道随机不平顺激扰模型，分析了欠超高和过超高状态下轮轨垂向力和横向力随曲线半径值变化规律。

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Applying the power spectral analysis, the laws of 2.2-year-periodicity can be found. With the method of the degree and time of concentration, we found that hails and cold disasters have a high frequency in spring and floods, droughts and typhoons often happen in summer.

对地震、水灾等6种灾害的功率谱、集中度和集中期分析显示，南通市自然灾害具有2.2年的年际变化规律和春季多冰雹、寒害，夏季多旱涝、台风的年内分布规律；

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Methods of Time Series of Setting up Power Spectral Density of Railway's Track Level Roughness

建立铁路轨道水平不平顺功率谱密度的时间序列方法

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It is showed that, these sample processes accurately reflect the prescribed probabilistic characteristics of the evolutionary power spectral density function when the number of the terms in the cosine series is large enough;

可以证明，当级数项数足够大时，模拟的样本过程可准确地反映渐进功率谱规定的性质；

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Observation on the anesthetic effect of nitrous oxide by EEG power spectral analysis

通过脑电功率谱观察笑气的麻醉作用

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Besides, the power spectral density of the images, the standard deviation of the density, and the unevenness are also changed with temperature rising, it is consistent with the experimental results of tissue protein solidification in microwave ablation.

此外，图像功率谱密度、密度标准偏差、不均匀度等也随着组织的温度升高而变化，这与高温消融情况下组织蛋白固化的实验现象相符。

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The results indicate that the power spectral entropy of heart sound signal in this study can be applied as a new measurement of cardiovascular system complexity.

结论表明心音信号功率谱熵可作为心血管系统复杂程序的一种新的量度。

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The globe and local bifurcation diagrams, power spectral density plot of the chaos and the time history plot and phase plane plot of three periodic motions are given, which are instructive to the real design of aircraft structures.

给出了全局分岔图、局部分岔图、混沌运动的功率谱密度图及3种周期运动的时间历程曲线和相平面图，对于实际的飞行结构设计具有重要的指导意义。

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A idiographic method and step using signal and noise Power Spectral Density design band-pass filter was put forward.

提出了通过分析有用信号功率谱和干扰信号功率谱设计滤波器的具体方法和步骤。

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Three methods for analyzing and processing the laser scattering signal of bubbles in water, the threshold detection, noise elimination processing and power spectral estimation, are put forward.

提出了阈值检测、降噪处理和功率谱估计三种分析和处理水中气泡激光散射信号的方法。

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AMI generated code, and for its power spectral density and time-domain waveform.

产生AMI码, 并求其功率谱密度和时域波形.

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RAH: A Texture Based Image Retrieval Algorithm Based on the Histogram of Image Power Spectral

基于图像能量谱直方图的纹理检索算法RAH

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Power spectral density method for impact evaluation of viaduct traffic in surrounding environment

高架道路交通荷载对环境影响的功率谱方法

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The matrix of power spectral density function of fluctuating wind load is established first.

首先建立了脉动风荷载的功率谱密度函数矩阵.

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Hence, combining power spectral analysis with chaotic analysis could provide some information for the early prevention, diagnosis and treatment of AN.

因而，结合功率谱法和混沌分析法，可为临床早期预防、诊断、治疗糖尿病AN提供参考。

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Chaos analysis of the dynamic behavior of temperature fluctuations in a vapor-liquid-solid three phases flow boiling system was conducted in terms of power spectral density function, autocorrelation function, reconstructed phase space, correlation dimension and Kolmogorov entropy.

运用功率谱分析、自相关分析、相图、关联维数和K熵等非线性分析技术对汽液固三相流动沸腾传热系统中的温度波动信号进行了定性和定量研究。

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Power spectral analysis indicates a 35 yr period dominated by low frequent variations exists.

功率谱分析显示有35年左右的周期。年代际尺度的波动是干湿变化的重要背景。

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