频谱混叠 meaning in English
spectral aliasing
Examples
- In this thesis , summarized the basic theories of fourier transformation and the fast fourier transformation that are generally adopted to detect and analyze the electric power harmonic in the electric power supply system . at the same time , summarized the even sample principle , the phenomenon of frequency mix , the window functions and the frequency leaking as so on , those are closely - related to sample from figure signal
简要阐述了电力系统谐波检测分析所普遍采用的傅利叶变换和快速傅利叶变换的基本理论以及与数字信号采样密切相关的均匀抽样定理、频谱混叠现象、窗函数和频谱泄漏等的基本理论。 - Study the spectral de - aliasing method of image restoration in frequency domain , and offer the improvement with block processing and recursive rstoration to some problems . at the same time , the biased estimate theory is applied in the restoration processing . these improved steps increase the value in the use of data and decrease the time of computation
2 、研究了基于频率域的解频谱混叠方法，针对该方法存在的问题，分别提出了分块重建和循环重建，提高了重建的效率；并将有偏估计用于重建理论中，提高了影像数据的利用率。 - Summarized no - line loads and the present situations of the electric power harmonic pollution in the guangyuan district ' s electric power supply system ; explained the theories of fourier transformation and the fast fourier transformation those are widely adopted by majority scholars to examine and analyze the electric power harmonic in the electric power supply system . summarized the principle of even sample , the frequency mix phenomenon , the window functions and the frequency leaking as so on , those are closely - related to the figure signal
简要阐述了电力系统谐波检测分析所普遍采用的傅利叶变换和快速傅利叶变换的基本理论，简要阐明了与数字信号采样密切相关的均匀抽样定理、频谱混叠现象、窗函数和频谱泄漏等的基本理论，同时阐述了电力系统的谐波检测与分析的相关理论基础知识。 - In the first part , the research progress of cloud motion wind was introduced and the significance of the 1 - d fourier analysis technique was given . in the second part , based on fluctuation theory and fourier analysis , the one dimension fourier analysis technique on cloud motion winds is deduced and demonstrated theoretically . by simulating mathematically on frequency and on space , we not only uncovered two questions in practice , first is phrase folding , second is frequency spectrum overlapping , but also gave methods and suggestions to solve them or avoid them
本文由六章组成，第一章介绍云导风技术的研究进展和傅立叶导风技术的研究意义；第二章以波动理论和傅立叶变换为基础，对傅立叶相位导风技术进行理论推证和误差分析，通过模拟分析了空间域和频率域的导风特点，揭示了在导风过程中出现的相位重叠和频谱混叠两种现象；第三章通过计算在空间域速度线性变化情况下频率域振幅权重平均速度( - Combining the hardware and software , the real - time performance is also discussed . ( 5 ) when the system is debugged , some problems are discussed in detail and solved , such as volts d . c of the input signal caused by a / d converter and aliasing in frequency spectrum arising as re - sampling input data . experimental results show that the performance of the system is satisfactory
( 5 )讨论了本dsp系统的软、硬件调试方法，并详细地讨论了在系统总体调试时，出现的各种问题? ?如a d器件引起的输入模拟信号的直流偏置、波束形成过程中由于数据抽取引起的频谱混叠，解释和说明各种问题出现的原因，并提出了相应的解决方案。