背景
发表于 2025-3-27 00:35:37
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neologism
发表于 2025-3-27 03:49:03
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密码
发表于 2025-3-27 07:37:17
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钳子
发表于 2025-3-27 12:58:02
https://doi.org/10.1007/978-3-658-39709-8 is much less than the speed of propagation of an electronic signal. As a consequence radio-electronic components that would otherwise have to be tens of meters in size can be replaced by acousto-electronic elements only centimeters in size.
Ledger
发表于 2025-3-27 17:41:13
Acoustic and Acousto-Optical Fourier Processors is much less than the speed of propagation of an electronic signal. As a consequence radio-electronic components that would otherwise have to be tens of meters in size can be replaced by acousto-electronic elements only centimeters in size.
EXULT
发表于 2025-3-27 19:49:01
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的是兄弟
发表于 2025-3-27 23:04:42
Contact Structures and Distributionsfunctions arose in the same context. A new class of singular functions arises in the analysis of a wave field in a neighborhood of a caustic. Among the pioneering works in this area is the paper of V.M. Babich (1961a), where new special functions are introduced to study a field near an elementary caustic.
杠杆
发表于 2025-3-28 06:08:56
Introductionerentiate discontinuous functions, perform the operation of integration to any complex power and carry out other such operations that are impossible in classical analysis. Such operations are widely used in mathematical physics and the theory of differential equations, where the ideas of generalized
intelligible
发表于 2025-3-28 07:21:29
Special Problems. is critical at all points . . where the dimension of . is less than the dimension of .. In §3 of Chapt. 2, we defined the inverse image of any generalized function defined on . under a submersion .: . → ., i.e., under a mapping that has no critical points.
exorbitant
发表于 2025-3-28 12:47:48
Contact Structures and Distributionsuding analytic questions of field theory). In particular the generalized functions that we call Hadamard kernels (Chapt. 1) were introduced under the name “nonsingular integrals of a new type” to construct a fundamental solution of a hyperbolic equation (Hadamard 1932). The work of Sobolev (1936) is