查询词典 radio wave

The results show that:(1) The space-charge fields(include dc space-charge fields and ac space-charge fields) have important effect on the beam-wave interaction output power, make the saturated output power lower, saturated position delay;(2) The back-radio excited by the electron beam has little effect on the output power, and can be ignored;(3) The transverse motions of electron beam has some effect of the output power;(4) The means of phase velocity taped and bunch compression can improve the relativistic TWT efficiency, especially bunch compression can greatly improve the efficiency.

五、分析了相对论行波管三维非线性特性，分析结果表明：(1)空间电荷场（包含直流和交流空间电荷场）对注波互作用输出功率影响很大，会造成饱和输出功率减小，饱和位置推后；(2)电子注激发的反向辐射对输出功率影响比较小，基本上可以忽略不计；(3)电子注横向运行对注波互作用的直接影响比较大；(4)通过改变耦合腔内半径来调节慢波结构相速，采用相速跳变和预群聚的方法可以改善相对论行波管的效率，特别是采用预群聚方法，可以尽量提高相对论行波管的效率。

The key technologies of novel photoelectron elements to support RoF are optical generations and receivers technologies for millimeter wave subcarrier, including external modulator method, radio frequency up-conversion method, self-heterodyne method, generator of optical pulse self-modulation, and so on.

近年来，支撑RoF技术的新型光电子器件的关键技术有毫米波副载波光学产生技术和接收技术，其中包括外调制器方法、射频上转换法、光学外差法、毫米波调制光脉冲发生器等等。

EPL makes use of short wave band glare to kill propanoic acid bacillus of acne inner , makes use of red light , infrared brightness to lower as well as radio-frequency current removes a color while the combination effect reducing sebaceous gland activity and , stimulates the deep collagen hyperplasia , restores a scar.

EPL利用短波段的强光杀死痤疮内的丙酸杆菌，并利用红光、红外光以及射频电流组合作用在降低皮脂腺活性的同时消除色沉，刺激深层胶原增生，修复疤痕。

Finally, that night Admiral Voss got out a message to Doenitz saying that all radio connection with the Army had broken down and urgently requesting the Navy to send over the naval wave length some news of what was happening in the outside world.

那天夜间，海军将领伏斯终于给邓尼茨发出了一个电报，说与陆军的一切无线电联系都已断了。他迫切要求海军通过海军的波长供给一些外界的消息。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！