Using field emission cathode, X ray source can be made with several advantages: smaller volume and brighter, high frequency response, in-time turning on, etc.
采用场发射阴极的X射线光源具有体积小，辐射强度高，频率响应快，可以随时开启，无需预热的优点。
In the field of wireless correspondence, high performance of frequency source is the core part of communication facility, radar, electronic reconnaissance and resistance equipment.
在无线通信领域中高性能频率源是通信设备、雷达、电子侦察和对抗设备的核心部件。
The preliminary research result of electromagnetic prospecting with the near field(transition region) of infinite-length line source in frequency domain is presented in this paper.
本文对频率域无限长线源近区（过渡区）测深的理论基础进行了探索性研究。
In AC electrical field, the stable homogeneous glow discharge will appear by using dielectric barrier layer and high-frequency power source.
在交流电场中，利用介质阻挡层和高频激励源，可获得稳定均匀的大气压下辉光放电。
In induced polarization method, multi-frequency relative phase spectrum method use above signal as field source, showed the advantage of PRMF signal used as field source for electrical exploration.
多频激电相对相位谱法采用上述信号作为场源，充分反映了该信号作为电法勘探场源的优点。
The signal power supply that this thesis proposed is a frequency variable power source used in test field. This thesis concentrates on analysis and designing the nuclear part: Inverter.
本文的信号电源就是变频电源在测试领域的应用，本文就信号电源的核心逆变器部分做了详细的分析和设计。
Some quantitative relations are given, and experimental evidence is provided for the use of the magnetic quadrupole field in high frequency ion source.
给出了某些定量关系，为磁四极场用于高频离子源提供了实验依据。
Traditionally, DSP only concerns in source coding as well as channel coding, but today, it begins to set foot in radio frequency modulation field.
信源编码，信道编码是DSP在通信信号处理中的传统经典应用，而如今DSP已深入射频调制部分。
Traditionally, DSP only concerns in source coding as well as channel coding, but today, it begins to set foot in radio frequency modulation field.
信源编码，信道编码是DSP在通信信号处理中的传统经典应用，而如今DSP已深入射频调制部分。
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