人造
发表于 2025-3-28 18:13:21
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不感兴趣
发表于 2025-3-28 21:30:54
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Vldl379
发表于 2025-3-29 02:16:23
Peter J. Fabrire of the seafloor is still far from complete. Underwater acoustics concerns itself today with the phenomena of propagation and noise at frequencies and ranges that require an understanding of acoustic interaction at both of its boundaries, the sea surface and seafloor, over depths ranging from tens to thousa978-1-4612-9293-7978-1-4613-2201-6
熔岩
发表于 2025-3-29 07:06:25
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斜谷
发表于 2025-3-29 11:13:55
Peter J. Fabriariation with distance has been ignored since (due to the small sizes of the optical components) only small angle diffraction need be considered. Using the Huygens-Fresnel wave propagation principle, each point on the wavefront emitted by P is considered to be a point source of spherical wavelets; a
遭受
发表于 2025-3-29 13:25:53
Peter J. Fabriterials science, and astronomy. Such studies have only recently begun in earnest because several difficulties had to be overcome, major among these being the lack (for some purposes) of sufficiently intense sources, and the technological difficulties associated with making efficient optical systems. As is wel978-1-4612-9304-0978-1-4613-2223-8
去世
发表于 2025-3-29 19:13:02
Peter J. Fabrivery to the tumor by instilling cytotoxic agents directly into the peritoneal cavity, but early studies were done in a limited number of patients using small injection volumes and the results were not particularly exciting . However, during the past five years there has been a resurgence of int
美食家
发表于 2025-3-29 23:08:11
very to the tumor by instilling cytotoxic agents directly into the peritoneal cavity, but early studies were done in a limited number of patients using small injection volumes and the results were not particularly exciting . However, during the past five years there has been a resurgence of int
Obsequious
发表于 2025-3-30 01:06:47
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gerontocracy
发表于 2025-3-30 04:48:45
Peter J. Fabris function approach, we first determine the field due to a point dipole at an arbitrary position and then, by linearly superposing the fields of a distribution of dipoles, we represent the field due to a specific source. The Green’s function approach, which is common to antenna theory , is ofte