领先
发表于 2025-3-26 23:18:51
Non-linear Optics: Second-Harmonic Generation and Parametric Oscillation, a stronger pump beam at . and a weaker signal beam at .. A special case of parametric amplification occurs when the signal amplitude at . is zero. Analysis by Maxwell’s equations shows that no amplification occurs at the output. However experiment shows that measureable spontaneous fluorescence occ
Corral
发表于 2025-3-27 03:26:19
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元音
发表于 2025-3-27 08:54:36
Quantum Fermions,ke heterostructures of AlGaAs-GaAs. A key structure for creating a one-dimensional channel is the quantum point contact. We show that the conductance of such a channel is finite and quantized in the ballistic transport regime. The quantum point contact is a fundamental building block for single elec
OREX
发表于 2025-3-27 12:36:23
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高谈阔论
发表于 2025-3-27 16:36:48
Thomas P. Pearsallsport and transformation, deposition patterns, uptake by biota, and eventual health impacts on living organisms. The increasing specialisation, and amount of research in the numerous scientific fields associated with the study of the fate of mercury in the environment, make the publication of this b
纠缠,缠绕
发表于 2025-3-27 20:21:41
Thomas P. Pearsallsport and transformation, deposition patterns, uptake by biota, and eventual health impacts on living organisms. The increasing specialisation, and amount of research in the numerous scientific fields associated with the study of the fate of mercury in the environment, make the publication of this b
WAIL
发表于 2025-3-27 23:02:30
Thomas P. Pearsallsport and transformation, deposition patterns, uptake by biota, and eventual health impacts on living organisms. The increasing specialisation, and amount of research in the numerous scientific fields associated with the study of the fate of mercury in the environment, make the publication of this b
幻想
发表于 2025-3-28 05:16:37
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大约冬季
发表于 2025-3-28 08:15:21
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bizarre
发表于 2025-3-28 12:21:18
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