thermionic emission

thermionic emission的基本解释

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[化] 热电子发射

与thermionic emission相关的网络例句 [注：此内容来源于网络，仅供参考]

In this paper, nanopowders of rare earth oxides and tungsten were prepared and 0-3 type nano-composit rare earth tungsten thermionic emission materials were fabricated with novel technics. The raw material selection, preparation technic parameter, structure, physical and chemical characteristic, the rare earth distribution and the emission behavior were studied. The influence between the active layer and the thermionic emission performance, rare earth elements diffusion and distribution along depth were investigated in detail. The surplus RE formation and the electron transfer were discussed in theoretically. The thermionic emission current density of the single surplus RE on the active layer was educed. We adopted "liquid-liquid mixing, freeze-drying and two stage-reduction" working step firstly to produce the RE-W nanopowders including La-W powder, Ce-W powder and Y-W powder.

本文采用细化显微组织的新工艺，制备了纳米稀土钨粉末和0-3型纳米复合稀土钨热电子发射材料，探讨研究其原料选择、制备工艺及参数、结构特征、物理和化学特性、稀土分布均匀性、以及热电子发射特性；系统研究了稀土元素的高温扩散情况、高温状态下活性层中稀土的纵向深度分布、以及表面活性物质和活性层厚度对热发射性能的作用；从理论上分析阐释了超额稀土的形成及其电子的传递过程；并从理论上推导了活性层中单个超额稀土的热电子发射电流密度。

The study about the flux and index of gamma-ray loud blazars show:(1)there is significant correlation between the luminosities in gamma-ray and VLBI radio energy band;(2)there are strong anticorrelarions among the observed indices of soft X-ray, hard X-ray and gamma-ray. For the FSRQs, the whole X-ray emission was contributed by synchrotron self-Compton emission, for the HBLs, the X-ray emission was dominated by synchrotron emission while the soft X-ray emission is dominated by synchrotron emission and the SSC emission dominate the hard X-ray energy band for LBLs;(3) there are strong radio-radio and radio-optical flux correlations for the quasar 3C 273. The higher frequency emission leads those in lower frequency. The multi-band complex indices strongly correlated with the high frequency flux which implies that the object is becoming bright when the energy spectrum is harden.

通过对γ噪Blazar天体的谱指数、流量的相关研究，发现（1）51个样本blazar的γ射线光度与VLBI光度之间存在显著相关；（2）软X、硬X以及γ波段的观测谱指数之间存在较强的反相关，对FSRQs，无论是硬X射线还是软X射线的辐射都是逆康普顿辐射的贡献，而对于HBLs来说，则是同步辐射的贡献，对LBLs，在软X射线波段以同步辐射贡献为主，在硬X射线能区以逆康普顿贡献为主；（3）3C 273的射电各个波段以及光学之间存在强相关，高频辐射一直领先低频辐射，3C 273的多波段复合谱指数和高频流量之间存在强的反相关，意味着当能谱变硬时对象变亮。

Electron tube, thermionic tube , thermionic vacuum tube , thermionic valve , tube , vacuum tube

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与thermionic emission相关的网络解释 [注：此内容来源于网络，仅供参考]

thermionic emission：热电子发射

现在比较为大家所接受的整流理论,是贝特(Hans Bethe)在1942年所提出的热电子发射(thermionic emission)的理论,这些具有较高能量的电子,可越过能障到达一般电子无法到达的地方,其理论与实际实验结果较为符合.

thermionic emission：热离子发射

thermionic current 热离子流 | thermionic emission 热离子发射 | thermionic 热离子的

thermionic emission：热电子放射

thermionic cathode 热电子阴极 | thermionic emission 热电子放射 | thermionic energy converter 热电子换能器

thermionic emission：热离子放射

thermionic current 热离子电流 | thermionic emission 热离子放射 | thermionics 热离子学

thermionic emission detector：热离子发射侦检器

热离子侦检器 thermionic detector | 热离子发射侦检器 thermionic emission detector | 热离子发生器 thermionic generator