“beta”的概念、定义、翻译、参考文献-科学参考

单词	beta
释义	beta [`bād·ǝ] ^ASTRONOMY For dust grains ejected from the nucleus of a comet, the ratio of the radiation pressure force to the solar gravitational force. ^ELECTRONICS The current gain of a transistor that is connected as a grounded-emitter amplifier, expressed as the ratio of change in collector current to resulting change in base current, the collector voltage being constant. ^NUCLEONICS The amount of reactivity of a nuclear reactor corresponding to the delayed neutron fraction. ^{PLASMA PHYSICS} The ratio of the ion energy density of a plasma to its magnetic energy diversity,or of the particle pressure to the magnetic-field pressure. ^{SCIENCE AND TECHNOLOGY} The second letter of the Greek alphabet; β, B.
随便看	collector capacitance collector current collector cutoff collector junction collector modulation collector plate collector resistance collector ring collector voltage Collembola collenchyma collenchyme collenia Colles' fracture collet Colletidae colliculus collider colliding-beam accelerator colliding-beam source colliding-pulse-ring dye laser colliery colligative properties collimate collimated beam

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