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1·A novel method of direct digital synthesizing frequency sweep signal is presented.

介绍了利用直接数字合成技术产生频率扫描信号的新方法。

2·A typical frequency sweep rheogram of nonionic surfactant liquid crystal can be observed at a moderate temperature range.

中等温度范围内表现出典型的非离子表面活性剂层状液晶的频率扫描曲线形式。

3·Advantages of the rapid frequency sweep technique for dynamic characteristics research of the linear system are also described.

特别对用快速正弦扫频试验方法研究线性系统动态特性的比点做了必要的说明。

4·The rapid frequency sweep technique and its basic principle have been introduced. Some examples of its practical application are given in the Paper.

本文简要介绍了快速正弦扫频试验技术及其使用的信号发生器的原理，并给出了典型应用实例。

5·A description is given, in particular, of the advantages of the rapid frequency sweep technique for the research on the dynamic characteristics of a linear system.

特别对用快速正弦扫频试验方法研究线性系统动态特性的优点做了必要的说明。

6·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。

7·When using frequency sweep meter to measure the input impedance of antenna, the balanced - unbalanced transformer must be connected between coaxial transmission line and antenna.

用扫频仪测量天线的输入阻抗时，在同轴传输线与天线间应按平衡—不平衡变换器。

8·The epoxidized natural rubber was tested by temperature sweep, frequency sweep and strain sweep by using rubber process analyzer, and the results were compared with that of natural rubber.

用橡胶加工分析仪对环氧化天然橡胶进行了温度扫描、频率扫描和应变扫描，并和天然橡胶的响应曲线进行了对比。

9·Image processing method is used to carry out frequency sweep and voltage sweep measurement. The in-plane motion characteristic of MEMS is obtained and the testing results are analyzed and discussed.

利用图像处理方法对MEMS谐振器做扫频和扫压测量，获得了MEMS器件的平面微运动特性，并对测量结果进行了分析和讨论。

10·The bats can also sweep through a frequency range of up to 170 kilohertz, moving from lower to higher notes, while a human singer produces a glissando through less than 2 kilohertz at most.

蝙蝠音频频率范围也可以高达170千赫，是=由从低频逐渐到高频。