...； 频率混叠； 有源电力滤波器； 谐波检测； 谐波抑制 [gap=999]Key words: instantaneous reactive power; frequency aliasing; active power filter; harmonic detection; harmonic suppression ..
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tidal high-frequency aliasing 潮汐高频混淆
Uniform frequency aliasing expression 统一混叠矩阵
aliasing frequency 混杂频率 ; 混叠频率
frequency y aliasing 频率混淆
Because of frequency aliasing resulting from wavelet transform, wavelet transform may causes misjudgment on Ferroresonance detection, at present the wavelet analysis on Ferroresonance detection is restricted to neutral isolated system.
由于小波变换过程中固有的频率混淆问题,使得小波变换在检测铁磁谐振信号时,各尺度信息不一定能表征被检测信号的真实频率成分,容易引起误判。
参考来源 - 电力系统铁磁谐振数字仿真研究The DCDFS algorithm introduces a factor dependent Doppler centroid to alleviate the impact of the squint angle when the nonlinearity and the RCM are compensated at the same time. At the position,the range frequency aliasing is removed.
在同时完成扫频非线性校正与距离徙动校正的过程中引入了一个与多普勒中心有关的因子,减小了斜视角的影响,从而降低了处理过程中引入信号的带宽,消除了距离向的频谱混叠。
参考来源 - 调频连续波SAR实时成像算法研究Because Fourier transform profilometry involved the operation of Fourier transformation and filtering, the problems about frequency aliasing, phase unwrapping and measurement precision are needed study further.
由于傅里叶变换轮廓术涉及傅里叶变换和频域滤波等操作，频谱混叠、相位展开、测量精度等问题一直是实际使用该方法过程中的关键问题。
参考来源 - 提高数字光投影傅里叶变换轮廓术精度的方法研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Methods: the mathematic method is used to find a uniform expression for frequency aliasing matrix of different resolution images.
方法：用数学方法求解对应于低分辨率遥感图像的统一频谱混叠。
The frequency aliasing due to sub-Nyquist sampling can be resolved by the proposed frequency aliasing resolving algorithm and information from the time-delay channel.
文中，欠采样所引入的频率模糊由增加的延迟通道提供的信息加以消除，并提出了相应的频率解模糊算法。
The experimental results show that the method can overcome the limitations of the critical angle between the object and reference beams, and omit the frequency aliasing.
实验结果表明，该方法可有效地突破最大物参角的限制，同时可以消除由于欠采样造成的频谱混叠现象。
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