1) non stationary frequencies
频率非平稳
1.
The distinctive feature and status in quo of artificial ground motions is analyzed in this paper, which set forth a simplified method to describe the non stationary frequencies of earthquake ground motions and statistical laws.
分析了人造地震波的特点与现状 ,给出了地震动频率非平稳特性的简化描述方法与统计规律 ,采用 ARMA模型研究了拟合反应谱的人造地震波合成方法 ,并通过算例对该方法进行了验证。
2.
The zero crossing ratio model is employed to describe the non stationary frequencies.
基于地震动频率非平稳特性的穿零率表示方法 ,进行了三维地震动穿零率参数相关性的统计分析 ,给出了三维相关的参数取值建议。
2) Frequency Non-Stationarity
频率非平稳特性
3) non-stationary both in amplitude and frequency
幅值和频率非平稳
1.
On the basis of Priestley s evolutionary power spectra and the typical response spectrum compatible technique for design accelerograms,a new iteration method is developed for generation of random earthquake accelerograms non-stationary both in amplitude and frequency which are compatible with target evolutionary spectrum.
在Priestley渐进谱和常用反应谱拟合技术基础上,提出一种拟合目标渐进谱生成幅值和频率非平稳地震动加速度时程的方法。
2.
Then a new iteration method is developed for generation of random accelerograms non-stationary both in amplitude and frequency which are compatible with target.
提出一种以渐进谱为目标谱的生成幅值和频率非平稳地震加速度时程的迭代方法。
4) artificial synthe-sis of seismic grnund motion
频谱非平稳
5) time-frequency non-stationarity
时-频非平稳性
6) frequency stability
频率稳定
1.
In order to reinforce the frequency stability of Yunnan power grid, the update and field tests of generator primary frequency control function have been carried out since 2005.
为提高云南电网频率稳定性,从2005年开始,并网发电机组的一次调频功能规范完善工作逐渐展开。
2.
A direct method for frequency stability analysis of power system is proposed in this paper,which is based on the Jacobi matrix of the last power flow calculation.
根据最近一次潮流计算的雅可比矩阵，提出了频率稳定分析的直接法，该方法不需进行逐步积分，能够一步计算出最近一次系统操作后的稳态频率，从而判断系统频率稳定性。
3.
A direct method for frequency stability assessment of power systems is proposed in this paper, which is based on the latest Jacobbi Matrix of the power flow calculation.
根据最近一次潮流计算的雅可比矩阵,提出了频率稳定分析的直接法,该方法不需进行逐步积分,能够直接计算出最近一次系统操作后的稳态频率,从而判断系统频率稳定性。
补充资料：频率计量(见时间频率计量)
频率计量(见时间频率计量)
frequency metrology: see time and frequency metrology
口n IQ liliang顷率频率计皿(f比quency metrolo盯) 计t。见时闰
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条