Research into fpga - based frequency measurement module of equal accuracy and its implementation 的等精度测频模块的研究与实现
In this paper , we proposed three approaches : watermark scrambling , amplitude shaping and adaptive prediction - based frequency domain shaping 在本文中,我们提出了三种方法:水印随机化,幅度整形和自适应预测频率域整形。
Cross - correlation method used in get based frequency part and realized balancing function . gao huawei ( mechanical design and theory ) directed by vice - prof 采用互相关原理提取振动信号基频分量,计算振幅和相位,完成了动平衡功能。
At last the results obtained are compared with those of t - beams , which shows : 1 ) the base frequency of t - beam and box girder bridge is different not only in the value but also in vibration direction 通过与此无关t型梁自振特性的结果进行比较,得出了一些重要结论:从t型梁到整体箱梁,梁的基频发生了改变。
By means of modulus measurements of two kinds of timber , when the frequency of vibration is higher than the base frequency , the elastic modulus is increased with frequencies ; but the loss modulus decreases with frequencies 在纵振动过程中,两种木材的动弹模量随着频率的增大而增大,而耗散因子随着频率的增大而减少。
base frequency meaning:[Electronics] 1. The frequency of the principal, or strongest, component in a complex signal or waveform; also called basic frequency. 2. The frequency of operation of a base-station transmitte...base frequency en francais:basse fréquencebase frequency перевод:1) _рад. основная или главная частота