...】 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
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。
The chirps of the garden birds sounded distant.
花园的鸟鸣听上去那样的遥远。
It seemed as if they talked to each other in soft chirps.
他们好像是通过轻柔的叽叽喳喳的叫声交流的。
So, too, does walking into your bird room to hear a cheerful "Hello," from a pet parrot, or even the joyous chirps that mean the bird recognizes you.
所以同样的,走进鸟房时听到一只宠物鹦鹉的“hello”甚至只是说明它们认出你来了的充满快乐的啾啾声都会让你开心不已。
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