没花的是打扰
发表于 2025-3-30 09:36:09
http://reply.papertrans.cn/17/1647/164620/164620_51.png
合适
发表于 2025-3-30 16:04:08
http://reply.papertrans.cn/17/1647/164620/164620_52.png
极肥胖
发表于 2025-3-30 20:29:06
http://reply.papertrans.cn/17/1647/164620/164620_53.png
非实体
发表于 2025-3-31 00:13:23
http://reply.papertrans.cn/17/1647/164620/164620_54.png
音的强弱
发表于 2025-3-31 02:09:37
Funktionelle Bewegungslehre Ballübungena method for detecting objects such as aircraft, vehicles or ships; and to that extent he would be correct. He might even add that other echoes from sea, clouds, rain or land was something called clutter to be eliminated as effectively as possible.
EXULT
发表于 2025-3-31 06:12:35
Funktionelle Bewegungslehre Ballübungeni Research Laboratories. During the initial phase of this investigation an application of digital techniques to a Doppler signal processor was considered where radar return data was cross-correlated with a bank of single-tone sinusoidal filters. In a practical system the operation would be repeated
卷发
发表于 2025-3-31 09:13:20
Funktionelle Bewegungslehre Ballübungenmaging by synthetic aperture radar (SAR). The foundation for discussion of SAR system performance has been given by Corless . A SAR system generates an image of the reflectivity distribution of the surface being observed, as it appears at the wavelength employed by the radar. Differences in gross
liaison
发表于 2025-3-31 15:15:21
Funktionelle Bewegungslehre Ballübungen model. Acoustic and electromagnetic wave propagation, with some restrictions, can be treated with nearly identical formal expressions. Common and analogous aspects of radar and sonar are presented, together with some concepts, models and methodologies elaborated for an underwater transmission chann
maudtin
发表于 2025-3-31 20:11:02
http://reply.papertrans.cn/17/1647/164620/164620_59.png
Aura231
发表于 2025-3-31 22:41:02
,Weitere therapeutische Übungen,ists in ducting the transmitted signal through a ground layer. The duct model used is that of Kahan and Eckart consisting of a discontinuous drop of the otherwise constant relative permittivity at the upper duct boundary. The earth is assumed to be an ideal conductor and ideally plane. The source of