对两幅图像低频波段的逼近系数取均值，对高频段选取绝对值大的小波包系数，得到融合系数矩阵。
Approximate coefficients in low frequency band of two images and the average over absolute wavelet packet coefficients of high frequency brand form a fused coefficients matrix.
这种分析方法也适用于极低频到甚高频波段。
This analytic method is also suitable for the bands of extremely low frequency (ELF) and very high frequency (VHF).
图2例示了多波段天线系统100，其表示在低频段中操作的多波段天线系统100中的导体元件102、104。
FIG. 2 illustrates the multi-band antenna system 100 showing the conductors elements 102, 104 in the multi-band antenna system 100 operating in a low frequency band.
X波段固态功率放大器相对于较低频段的固态功率放大器，其稳定性问题更加突出。
Stability problem in X-band solid-state power amplifier is rather evident than other lower frequency solid-state power amplifier.
根据工作频率来分，RFID系统可以分为低频，高频，超高频和微波四个波段。
In terms of operation frequency, RFID systems can be divided into four categories: low frequency (LF), high frequency (HF), ultra high frequency (UHF), and microwave.
根据工作频率来分，RFID系统可以分为低频，高频，超高频和微波四个波段。
In terms of operation frequency, RFID systems can be divided into four categories: low frequency (LF), high frequency (HF), ultra high frequency (UHF), and microwave.
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