Wavelet packets with the advantage of time frequency zoom is used in this paper to decompose the post fault transient electrical quantities by the proper frequency span.
应用在时频空间皆具有良好聚焦特性的小波包，以适当频率带宽，对故障后暂态电气量进行分解。
The relationship between frequency and prestress, ratio of rise to span of tensioned cable and membrane structure are also studied.
系统分析了索膜结构自振特性与预应力、矢跨比、索初始应力等的关系。
The first frequency method of estimating the fatigue serviceability on small and medium span railway concrete bridge is discussed in this paper through three piece test beam under fatigue load.
通过三片模拟梁试验实测结果，探讨了基频法评估铁路桥梁疲劳使用性能的可行性。
Due to distortions, that span 11.5 dimensions of frequency, the process now takes place through successive reincarnations.
由于扭曲，跨越11.5维度的频率，有过这样的过程，通过成功连续再投胎的方式产生了。
In China, the high rise structures load code is used for the large span spatial structures, only the first frequency is taken account for the wind vibration analysis, which is not reasonable.
我国现在仍是采用高耸或高层结构的荷载规范，只取结构的第一阶频率计算风振系数，按此方法进行大跨空间网格结构的风振分析是很不合理的。
Due to the large span, small elasticity and feebleness damp in aerospace, the solar panel easily generates non-linear vibration with low frequency.
由于太阳能电池翼的大跨度，低刚度特点，加之太空中阻尼较弱，使得电池翼极易产生低频非线性的持续振动。
Magnetoelectric sensor is a kind of non-contact sensor and has some useful characteristics, such as non-contact, high response frequency, low power waste, high reliability, long life-span and etc.
磁电传感器是一种非接触式传感器，它具有无触点、无开关瞬态抖动、响应频率高、低功耗、高可靠性和长寿命等特点。
Only wind action of deck is generally taken into account in frequency-domain and time-domain buffeting response analysis for long-span bridge.
大跨度桥梁频域及时域抖振分析中通常仅考虑主梁的脉动风效应。
Objective This in vitro study quantitatively assessed the effect of frequency and time span of immersion of human teeth in acidic soft drinks on enamel surface microhardness.
目的本实验用显微硬度测量法，定量研究和评估人离体牙釉质在酸性饮料中的硬度变化，比较牙釉质在饮料中浸泡时间及浸泡频率对釉质表面硬度的影响。
Tooling; Life span; Change frequency;
刀具；寿命；更换频率；
Authors presented a finite element (FE) model and frequency analysis method for analyzing 3-d full-mode flutter of long-span Bridges using ANSYS software.
提出了一种在ANSYS中直接分析大跨桥梁三维全模态颤振的有限元模型和频域方法。
Based on the pseudo-excitation method and the finite element method, a new random vibration method is developed for predicting buffeting internal forces of long-span Bridges in the frequency domain.
基于虚拟激励法和有限元法，在频域建立了一种新的桥梁抖振内力响应分析的随机振动方法。
SPAN button. This button is used to select either 10KHz, 1KHz, or 100Hz steps for the VFO. The currently selected step is indicated by a line under the relevant digit on the Frequency Display.
通带按钮，此按钮用来在VFO（可变频率震荡器）上选择10KHz，1KHz或100Hz的步长频率，当前所选择的步进，是在「频率显示」中的相关数字下面，用一条线显示出来。
The wind load has recently become a major concern in wind-resistant design of long-span roof structures due to their characteristics: light, flexible, lightly damped, low natural frequency and so on.
风流经过大跨屋面时，由于气流分离在屋面的大部分区域产生强大的吸力，并引起柔性屋面结构的振动，因此大跨屋面结构抗风设计需考虑风振响应和风振系数。
The wind load has recently become a major concern in wind-resistant design of long-span roof structures due to their characteristics: light, flexible, lightly damped, low natural frequency and so on.
风流经过大跨屋面时，由于气流分离在屋面的大部分区域产生强大的吸力，并引起柔性屋面结构的振动，因此大跨屋面结构抗风设计需考虑风振响应和风振系数。
应用推荐