radio-frequency spectrum

radio-frequency spectrum的基本解释

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射频频谱

与radio-frequency spectrum相关的网络例句 [注：此内容来源于网络，仅供参考]

The issues of present seismic wavelet frequency caused by different concepts, such as apparent frequency, dominant frequency, peak frequency and centroid frequency, etc., which are defined by different methods, and understanding deviation, definition of seismic wavelet frequency for time and frequency domain are concluded and summarized. On this basis, three kinds of seismic wavelets in common use such as Ricker and Zinc wavelets as well as sine wavelet with exponential attenuation characteristics are analyzed and a conclude is achieved that apparent frequency and dominant frequency are consistent in essence, but peak frequency and centroid frequency as well as apparent frequency or dominant frequency are not completely consistent with different seismic wavelets. For actual seismic data, peak frequency can approximately be used as dominant frequency, but it is not suitable when seismic wavelet is known for it can give out any wrong knowledge and results.

针对目前地震子波频率由于定义方式出现的各种概念（视频率、主频、峰值频率、中心频率等）以及理解上出现的偏差等问题，首先从时间域定义和频率域定义2个方面进行了归纳和总结，并在此基础上对3种常用地震子波（Ricker子波，Zinc子波，正弦指数衰减子波）进行了分析和研究，得出视频率与主频概念一致，但不同地震子波的峰值频率、中心频率和视频率之间并不完全一致的结论；而对于实际地震资料，将峰值频率近似看作地震子波的主频是可以的，但在地震子波已知的情形下这样做是不恰当的，甚至可能会得出错误的结论和认识。

To implement policies and regulations of national radio management, to draft local laws and regulations of radio management; to be in charge of the assignment and management of radio frequency resources according to the national plans; to examine and endorse allocation of addresses and usage of radios, to assign frequency and call letters, to issue the licenses for radio stations, to be in charge of collecting fees that concern radio management; to organize and direct the construction of wireless monitoring net and the monitoring work for electromagnetic environment, to organize and implement the supervision towards radio in accordance with the law, to maintain the order of electric wave in the sky, to be in charge of administrative enforcement of Law of radio management; to guide and supervise agencies of radio management, to undertake the foreign affairs of radio management.

贯彻执行国家无线电管理的政策、法规，起草无线电管理地方性法规和规章；依据国家规划，负责无线电频率资源的指配与管理；审批无线电台的地址设置和使用，指配频率和呼号，核发电台执照，负责无线电管理有关收费工作；组织指导无线电监测网建设及电磁环境监测工作，依法组织实施无线电管制，维护空中电波秩序，负责无线电管理行政执法；对无线电管理派出机构进行业务指导和监督，承办无线电管理涉外事宜。

To further understand and correctly master the notion of marginal spectrum in Hibert-huang transform, the linear property of marginal spectrum is demonstrated, an mistake to the notion of marginal spectrum in some documents is pointed out, and a new viewpoint about the essential difference between marginal spectrum and Fourier frequency spectrum is put forward by which the amplitude of Fourier frequency spectrum only represents the probability that a frequency objectively exists in a signal while the amplitude of marginal spectrum decides whether a frequency objectively exists in a signal.

为了深入理解和正确掌握希尔伯特－黄变换（Hilbert-Huang Transform，简称HHT）中的边际讲概念，证明了边际谱的线性性质，指出了文献中对边际谱概念的一种误解，提出了边际普与Fourier频谱之间本质区别的一种的新观点，即Fourier频谱的幅值只能反映频率在信号中实际存在的可能性大小，而边际谱的幅值则能真实反映频率在信号中是否存在。

与radio-frequency spectrum相关的网络解释 [注：此内容来源于网络，仅供参考]

radio frequency spectrum：无线电频谱

Radio Frequency Registration Board 无线电频率登记委员会 | radio frequency spectrum 无线电频谱 | radio frequency system 射频系统

radio frequency spectrum：射频频谱

radio-frequency spectroscopy 射频波谱学,射频谱学 | radio-frequency spectrum 射频频谱 | radio frequency sputtering 射频溅射

frequency spectrum analysis：频谱分析

frequency spectrum analyser 频谱分析仪 | frequency spectrum analysis 频谱分析 | frequency spectrum 频谱