... frequency sounding 频率测深 frequency span 频带宽度 frequency spectrum designation 频段名称 ...
基于42个网页-相关网页
Minimum Span Frequency Assignment Problem 最小跨度频率指配问题
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。
应用推荐