Muscularis
发表于 2025-3-28 16:44:33
Magnetic Materials and Devices,e wants a material with as low a coercivity as possible, so that hysteresis losses are minimized, or writing times are reduced, such as in transformers, inductors or recording media (though there are special requirements here). Having shown that the source of coercivity is aniso-tropy in magnetic pr
背信
发表于 2025-3-28 19:33:15
Dielectrics,suffers displacement of its electrons with respect to their parental nuclei, creating thus electric dipoles. The electric field is said to (electrically) polarize the material. The dipole moment of the polarized atom in figure 8.1 is given by μ = .ξ, where ξ is the displacement of the charge cloud.
花束
发表于 2025-3-29 02:55:38
Materials for Optoelectronics, of transmission. Though it can be argued convincingly that optoelectronics has existed in practice for some considerable time, it was the remarkable advances in materials for optical fibres — especially for telecommunications — occurring in the 1970s that led to the current wealth of activity in th
NEXUS
发表于 2025-3-29 04:41:28
Superconductors,sure at a temperature of about 4 K. The work Onnes was doing was a consequence of his earlier experimental achievement, the liquefaction of helium in 1908. Before helium was liquefied, there was no way of cooling a body much below the boiling point of hydrogen (about 20 K), far too high a temperatur
有毛就脱毛
发表于 2025-3-29 10:05:02
Andrea Macchi,Giovanni Moruzzi,Francesco Pegoraro information from digitized documents in multiple languages; analyzing graphs and networks to shed light on adversaries’ goals and intentions; and developing software systems that enable analys978-3-642-42613-1978-3-642-01141-2
裹住
发表于 2025-3-29 14:11:04
Measurement of Conducted Electro-magnetic Interference (EMI) and Design of EMI Filter,MI filter. In this chapter, the main instruments for measuring the conducted EMI will be introduced, including the line impedance stabilization network (LISN), noise separator and the EMI receiver, and the design of EMI filter will be presented.
aesthetic
发表于 2025-3-29 18:32:06
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管理员
发表于 2025-3-29 23:16:51
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