使用复解析信号法研究了束宽与频率无关的超短脉冲贝塞尔·高斯光束在自由空间的传输特性。
Using a complex analytical signal representation, the free-space propagation properties of ultrashort pulsed Bessel-Gauss beams whose waist width is independent of frequency are studied.
利物浦主帅拉法·贝尼特斯接受了在追求塞维利亚后卫阿尔维斯上失败的结果。
Liverpool boss Rafa Benitez has accepted defeat in his pursuit of Sevilla fullback Daniel Alves.
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