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- It can be shown that the power spectral density matrix of velocities and/or accelerations process of water particles in stochastic waves had only one non-nil independent eigenvalue and eigenvector. 结合桥墩基础处不同深度水质点波动速度和速度的功率谱密度矩阵仅具有一个独立特征值的特点,推导了随机波动模拟的简化计算公式,简化公式具有较高的计算效率。
- cross spectral density 互谱密度,交叉谱密度,相交谱密度
- spectral density matrix 谱密度矩阵
- power spectral density matrix 功率谱密度矩阵
- Off-diagonal elements of density matrix go to zero. 经典定义:密度矩阵非对角元趋于零。
- 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。
- A random signal of known statistical properties of amplitude, distribution, and spectral density. 振幅、分布及谱密度等的已知统计特性的随机信号。
- By solving the density matrix equations, we gained the susceptibility. 通过求解密度矩阵方程,得到感生极化率。
- It provides a lot of accurate formulae for spectral density transforming into Allan variance. 本文推导了有限频域[f_a,f_b]中的噪声引起的修正的Allan方差公式,为噪声的谱密度变换成Allan方差提供了准确的公式。
- We analyse statistics properties of ground clutters and study AR model of correlated clutters power spectral density. 分析了地杂波统计特性，研究了相关雷达杂波功率谱特性的AR模型及其模拟方法。
- The paper analyses the signal processing with emphasis on Signal to Noise Ratio (SNR) in output of correlator and SNR in signal power spectral density. 并对算法处理中相关器输出中的信噪比（SNR）和功率谱密度中的SNR进行了重点分析。
- A method is proposed to construct a localized active functional space from the density matrix of a large system. 报道了从大体系的密度矩阵出发构造定域于指定局部的活性泛函空间的方法和程序。
- With the power spectral density, the vibration mechanism and the vibration transfer process of viaduct caused by the traffic load were introduced. 摘要从功率谱的角度介绍城市高架桥梁在交通荷载下产生振动的机理和振动的传递过程。
- The power spectral density of gearbox vibration signals is estimated by the periodogram from which original feature sets are derived. 为了使诊断结果更好地可视化,利用遗传编程结果的固有随机性,提取两个新特征指标。
- In practical application,one of the difficulties is the adjustment of the power spectral density function to various soil conditions. 在实际应用中,调整功率谱密度函数以适应各类场地土仍是一项困难的工作。
- In this paper, expound a semiclassical density matrix theory, it was used by Author in theoretical study of miniature optically pumped submillimeter wave laser. 重点论述在小型光泵亚毫米波激光的理论研究中所应用的量子系统的半经典密度矩阵理论。
- The atom's reduced density matrix is calculated when the quantum theory in small system coupled to thermal reservoir is used.The decoherence properties of atom is analyzed. 利用小系统与库耦合行为的量子理论，计算原子约化密度矩阵非对角元，分析原子状态的消相干特性。
- Therefore, experience is needed to made good analysis.We dealt with the colonic pressure data by analyzing its power spectral density(PSD).The PSD is com... 本文对实际采集的结肠压力信号进行功率谱密度分析,并与结肠的基本功能相对照。
- This paper presents a IJF coding method based on filter shaping, and deduces IJF power spectral density adopting this method.Finally this paper simply introduce FQPSK modulation. 本文介绍基于滤波器成形法的IJF编码，并推导基于该法的IJF功率谱密度，在此基础上简要介绍了FQPSK调制体制。
- We start from the schrodinger equation, researching on the interaction process of cold atoms system with Raman laser pulse, and then educe the density matrix equation. 第二章推导出了原子与拉曼脉冲激光作用后的能态分布矩阵以及原子在重力场中的传输矩阵。
