prediabetes
发表于 2025-3-28 14:57:48
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运动的我
发表于 2025-3-28 21:47:40
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革新
发表于 2025-3-29 00:32:50
Field-effect transistors, layer. In the 1970s the problems were solved and FET technology developed at a rapid pace. FETs are now more widely used than BJTs and have made an enormous impact on integrated circuit (IC) technology. Not only have very low-power CMOS (complementary metal oxide-semiconductor, a type of FET) ICs h
HERTZ
发表于 2025-3-29 04:31:10
Integrated circuits,g together the discrete components of a circuit — such as resistors, capacitors, inductors, diodes and transistors — the IC designer arranges for them to be produced and electrically interconnected as a single ‘chip’. There are many advantages in so doing: the devices need no packaging, the intercon
CARK
发表于 2025-3-29 08:01:28
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不整齐
发表于 2025-3-29 13:04:36
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Estrogen
发表于 2025-3-29 16:30:25
Magnetism and electromagnetism,n 1269 that lodestone had N and S poles like the earth and the first scientific book. on magnetism was published in 1600. A knowledge of elementary magnetism and electromagnetism is fundamental for studying electrical machines and transformers. We shall accordingly look at some basic magnetic phenom
可卡
发表于 2025-3-29 23:26:14
DC machines, do the converse. Usually a DC machine can serve either purpose. AC machines are more widely used than DC machines, but in certain applications DC machines used to be preferred, especially in traction and whenever speed control over a wide range was desired. With the development of high-power semico
Encephalitis
发表于 2025-3-30 01:48:38
Three-phase systems,milar systems were soon installed all over the world. AC generators began to be used for the same purpose and the two varieties of electricity supply coexisted for a time, with the advantage perhaps lying with DC generation. The invention by Tesla of the induction motor in 1887 altered the balance d
主讲人
发表于 2025-3-30 04:07:15
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