The Doppler character of the frequency stepped signal is resolved into several elements, and the influence of every element on synthesized range output is analysed in detail.
将频率步进信号的多普勒特性分解为几个基本因素，详细分析了各部分对合成处理距离输出的不同影响。
This paper presents a synthesized model updating method using the modal parameters and frequency response functions(FRF) extracted from the vibration test data.
文章提出了一种利用模态参数和由振动试验数据求得的频响函数来进行模型修正的方法。
In the direct digital synthesis of periodic signals, the frequency resolutions and bands of the synthesized signals are limited by the working frequency and data capacity of the synthesizing system.
在利用直接数字式合成方法产生周期信号时，信号的频率分辨率和带宽直接受限于合成系统的工作频率和存储容量。
The power synthesizer has the advantages of high frequency stability, high power stability, high synthesized efficiency, convenient regulation, etc.
本功率合成器具有频率稳定度高、功率稳定度高、合成效率高、调试方便等优点。
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。
Start frequency, stop frequency and sweep time of the signal synthesized by the method can be preset freely and controlled accurately.
被合成的频率扫描信号的起始频率、终止频率和扫描时间可根据需要随意设定，并且可以实现对三者的精确控制。
A new radial velocity estimation method was presented to compensate the effects of the targets radial velocity on range profiles synthesized from a stepped-frequency radar.
为补偿目标径向速度对频率步进雷达合成距离像的影响，提出了一种目标径向速度估计方法。
Wireless equipment that uses this type of frequency control is said to be frequency-synthesized.
无线设备，使用这种类型的频率控制频率合成。
In order to improve the naturalness of synthesized speech, a high-frequency word speech database as well as the syllable database is constructed.
同时，本文介绍了构建语音库的方法，为了提高合成语音的自然度，本文同时构建了音节语音库和汉语中高频词语音库。
After the sequence passes through digital-to-analog converter and low pass filter, the desired frequency sweep signal is synthesized by the method of direct digital synthesis.
该序列通过数-模转换器和低通滤波器后，产生出频率扫描信号。
With correction of phase difference for the max peak, the amplitude and phase of each order frequency can be acquired. At last, the holospectrum was synthesized.
仿真及对柔性转子试验台振动信号的分析结果表明，基于频谱细化和相位差校正的全息谱能有效提高其分析精度，更加精确有效地诊断旋转机械的故障。
Aluminum nanopowders were synthesized by high frequency induction evaporation condensation method, and aluminum nanopowders was treated by passivation in air.
采用高频感应线圈加热，以蒸发-冷凝法制备了纳米铝粉，用空气进行钝化处理，得到有钝化层保护的纳米铝粉。
Aluminum nanopowders were synthesized by high frequency induction evaporation condensation method, and aluminum nanopowders was treated by passivation in air.
采用高频感应线圈加热，以蒸发-冷凝法制备了纳米铝粉，用空气进行钝化处理，得到有钝化层保护的纳米铝粉。
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