...】 分数阶傅立叶变换；线性调频信号；匹配滤波器；超声滤波；信噪比 [gap=966]Key words：Fractional Fourier transform; Chirps; Match Filtering; Ultrasound filtering; Signal to noise ratio ..
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keying chirps 啾啾声
Morning Chirps In Mountains 深山晨嚣
multi-chirps jamming 多个宽带Chirp干扰
Chirps&Mews 璀璞小馆
frequency chirps 频率啁啾
chirps of birds 停止了
up and down chirps 正负斜率线性调频信号
V-I When a bird or an insect such as a cricket or grasshopper chirps, it makes short, high-pitched sounds. 虫鸣; 鸟叫
The crickets chirped faster and louder.
蟋蟀叫得越来越快，越来越响。
N-COUNT Chirp is also a noun. 鸟的叫声; 虫的鸣叫声
The chirps of the garden birds sounded distant.
花园的鸟鸣听上去那样的遥远。
chirping N-UNCOUNT
...the chirping of birds.
...鸟的鸣叫声。
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