| 1. | It can be changed according to program or music beats , signal strength and frequency content
可以根据已编程序或音乐节拍，信号强弱及频率成份跟着乐曲来变化。 |
| 2. | Along with the digital video frequency rapid growth , fast and the effective retrieval technology changes more and more to the video frequency content importantly
随着数字视频的飞速增长，对视频内容快速而有效的检索技术变得越来越重要。 |
| 3. | ( 2 ) damage detection based on wavelet transformation using the principle of time - frequency analysis based on orthonormal discrete wavelet transformation , it can detect damage by analyzing how the frequency content of observation signal changes with time
该方法利用基于离散正交小波变换的信号时频分析原理，通过分析观测信号的频谱随着时间的变化情况来检测破损。 |
| 4. | We have imported some state - of - the - art equipments such as : high - frequency vibroseis and multi - level geophones for field data acquisition . by doing so , we have acquired high - quality seismic data with high sample rate , high signal to noise ratio and high frequency content
在采集上，引进国外高频可控震源，多级检波器等主要设备，得到高采样率、高信噪比、高分辨率的高品质资料。 |
| 5. | Wavelet theory began from 1980 ' s and developed greatly in 1990 ' s . wavelet theory provides a new powerful tool for studies relying on the time - frequency signal analysis . the main advantage of wavelet transform remains in its ability to locally describe signal frequency content
它是传统傅立叶变换的新发展，它较付氏分析的主要优点在于可同时在时域和频域局部化，被看作是一种新的时频分析工具。 |
| 6. | As a result , the low - frequency contents increase as the centroid of signal spectrum experiences a downshift , in case that frequency is independent on quality factor , the offset of the centroid frequency is proportional to the integral of attenuation factor along wavepath , thus can he used to reconstruct the attenuation distribution
假设介质的品质因子与频率无关，地震波主频的偏移量与吸收系数对传播路径的积分成比例，则通过它们之间的关系可以估测介质的吸收系数。 |
