1·This paper introduces the principle of direct digital synthesizing signals and analyzes the frequency spectra of synthesized signals.
文中给出直接数字合成波形的基本原理，分析了合成波形的频谱。
2·It's colors denotes the frequency spectra of the Triadic, Polaric & Eckatic levels of the Energy Matrix and 15 Dimensions of frequency.
它的不同颜色代表着能量矩阵（Energy Matrix）中三合一的极点&Eckatic层级的频率光谱和频率的15个维度。
3·The acceleration process caused by Yuanyuan M5.8 Earthquake at the top of Ertan Reservoir Dam and its Fourier frequency spectra are analyzed.
介绍了盐源5 8级地震二滩大坝顶部的加速度时程及傅氏谱。
4·At the expense of increasing probability of misinformation (false alarm), weak signals in very wide range of frequency spectra may be resolved.
以增加错认(或虚惊)概率为代价，可以在很宽频谱范围内分辨微弱的信号。
5·The outer frequency spectra of wind waves are estimated with the time series data of wave elevation measured in the laboratory wind wave flume.
利用实验室风浪槽内测得的波面序列资料估计风浪外频谱。
6·Various directional filters can be designed according to the directional characteristic of the frequency spectra of gravitational and magnetic fields.
根据重磁场频谱的这一方向特性，可以设计出各种各样的方向滤波器。
7·The signals were divided into segments and the frequency spectra were got and the frequency features were achieved and 4 types of variation of frequency were found.
对微地震信号预分段，用小波提取其频率谱中的频率特征，得到了频率变化的四种趋势。
8·The vertical structures of temperature and wind in the boundary layer also have an effect on the vertical distribution of low-frequency spectra of horizontal wind velocity.
边界层温度和风速的垂直结构也会影响到水平风速低频谱的垂直分布。
9·In the past 20 years, the imaging technique of ultrasound imaging equipment has made much progress in harmonic imaging, coherent imaging, Doppler imaging and frequency spectra analysis.
近20年来，超声成像设备在电脑超声成像技术，谐波成像技术，相干处理成像技术，多普勒频移成像技术，回波频谱分析技术等方面取得了重大进展。
10·The temperature spectra and frequency spectra of the damping capacity in the IM and RS/PM Al-Li alloys with the same composition were measured by the resonance method with the plate specimens.
采用板片状试样的共振法，测定了同一成分的铸锭合金（IM）和快速凝固粉末冶金（RS／PM）铝锂合金的阻尼温度谱和频率谱。