電子發射體 的英文怎麼說
中文拼音 [diànzifāshètǐ]
電子發射體
英文
electro emitter-
Icp - aes determination of arsenic in vinegar
電感耦合等離子體原子發射光譜法測定食醋中砷With the use of finite method we have developed computer simulation software for vacuum microtriodes with wedge - shaped and cone - shaped cathode on the basis of stduying deeply the field emission theory of vacuum microelectronics. the software included field section, grid point numbering, and the calculation of electric currents, transconductance and cathode capacitance, moreover, it can simulate the properties of vacuum microeletronic with variant structures and sizes. the relationship was studied and simulated among electic properties and device structures, sizes and cathode materials etc. the optimized design of vacuum microtiode was proposed
本文在深入研究真空微電子器件場致發射理論的基礎上，根據圓錐形、楔形陰極真空微電子三極體的不同特點，分別建立了物理和數學模型，在考慮空間電荷密度影響的前提下，以有限元法為基礎採用迭代的方法計算出真空微電子三極體內的電勢分佈情況，繪制出了等勢線、電子軌跡線，並得到了器件電學性能隨幾何參數的變化情況。Optimization investigation on the elements in ferrum aluminum silicon alloy by icp - aes
電感耦合等離子體原子發射光譜法測定硅鋁鐵合金中多種元素的優化研究Yttrium - europium oxide - determination of lanthanum oxide, cerium oxide, praseodymium oxide, neodymium oxide, samarium oxide, gadolinium oxide, terbium oxide, dysprosium oxide, holmium oxide, erbium oxide, thulium oxide, ytterbium oxide and lutetium oxide contents - inductively coupled plasma atomic emission spectrographic method
氧化釔銪化學分析方法電感耦合等離子體原子發射光譜法測定氧化釔銪中氧化鑭氧化鈰氧化鐠氧化釹氧化釤氧化釓氧化鋱氧化鏑氧化鈥氧化鉺氧化銩氧化鐿和氧化鑥量Europium oxide - determination of lanthanum oxide, cerium oxide, praseodymium oxide, neodymium oxide, samarium oxide, gadolinium oxide, terbium oxide, dysprosium oxide, holmium oxide, erbium oxide, thulium oxide, ytterbium oxide, lutetium oxide and yttrium oxide contents - inductively coupled plasma atomic emission spectrographic method
氧化銪化學分析方法電感耦合等離子體原子發射光譜法測定氧化銪中氧化鑭氧化鈰氧化譜氧化釹氧化釤氧化釓氧化鋱氧化鏑氧化鈥氧化鉺氧化銩氧化鐿氧化鑥和氧化釔量This project which is based on the demand of increasing the electron tube ’ s qualities totally and reducing the manufacture cost has done a large amount of investigative work as follows to improve and perfect the technologies for the important part of electron tube manufacture ? the grid surface processing : on the surface processing of the molybdenum grid, the primary purpose is to reduce thermionic emission and secondary electronic emission of the grid. by the constantly experiment and grabbling the different technology routes, we have successfully developed these new technologies on the tac and zrc electrophoresis and electroplating platinum black of the grid, and made its surface cladding quality very stable and reliable
本課題是基於整體提高電子管的質量和降低生產成本的要求，對電子管生產中的重要部分? ?柵極的表面處理技術進行改進和完善，主要在以下方面進行了深入研究:在鉬柵極表面處理方面，主要為實現降低柵極的熱電子發射和二次電子發射，通過不同工藝路線的不斷試驗和摸索，成功開發出柵極電泳tac 、 zrc和電鍍鉑黑的新工藝，使柵極的塗覆質量穩定可靠。Determination of scandium content - icp - aes method
電感耦合等離子體原子發射光譜法測定鈧量Method for chemical analysis of rare earth ores - determination of scandium content - icp - aes method
稀土礦石化學分析方法電感耦合等離子體原子發射光譜法測定鈧量Special tool motivated by gas, liquid or pipeline conveyance medium to cleanup the pipeline, which can carryover the electronic launcher instrument and the ground tracking device
由氣體、液體或管道輸送介質推動，用以清理管道的專用工具。它可以攜帶電子發射裝置與地面跟蹤儀器。The melted tungsten carbide would react with the steel matrix on the interface and the reaction zone was observed as a result. the reacting production was examined as fe3w3c by means of x - ray diffraction and scanning electron microscopy analysis. the reaction between tungsten particle and steel matrix could improve the interfacial bonding strength remarkably
Wc鋼復合材料的制備過程中， wc顆粒在高溫下發生了局部溶解並在wc顆粒和鋼基體界面處發生了界面反應； x射線衍射和電子衍射花樣分析表明，反應產物為高穩定性的fe _ 3w _ 3c ，界面反應有效地改善了wc顆粒與鋼基體的界面結合。Test method for determination of contaminants in gas turbine and diesel engine fuel by rotating disc electrode atomic emission spectrometry
採用旋轉圓盤電極原子發射光譜法測定氣體渦輪機和柴油機燃料雜質的試驗方法In simulations, all important phenomena, such as non - neutral sheath widening near cathode, cathode electron emitting, current channel migrating to the load side of the plasma, ion accelerating toward cathode and magnetic insulation of cathode emitting electrons etc, have been observed and depict the internal physics of this device. also presented is the influence of cathode emitted electrons on phenomena in the conduction processes of pegs. the simulation results show, without cathode emitted electrons, rapid magnetic field penetration takes place only in region near the cathode, with cathode emitted electrons, magnetic field penetration takes place in all plasma region
診斷發現了陰極表面非中性鞘層的形成、陰極電子發射、電流通道的漂移、等離子體離子加速以及陰極電子磁隔離等物理現象，揭示了這一斷路器件的物理機制；分析了陰極電子對peos導通過程中的物理現象的影響，模擬結果顯示：忽略陰極電子作用，磁場滲透現象主要出現在陰極表面區域，考慮陰極電子作用，磁場滲透現象出現在整個等離子體區域。In the investigation of the interaction of the us - ui laser pulse with the plasma, a standard - ray source is firstly used to absolutely calibrate lif mermc - luminescence dosimeters ( tlds ), and the dosimeter are employed as the angular distribution spectrometer and the energy spectrum spectrometer of the hot electrons
在超短超強激光等離子體相互作用的研究中，首次採用137cs鄧標準源對lif熱釋光探測器（ tlds ）進行了絕對標定。並以此作為電子角分佈儀和電子譜儀的探測元件，研究了超短超強激光與等離子體相互作用中超熱電子發射的角分佈和能量分佈。However, the most commonly used x - ray sources didn " t change much no matter in structure or theory, still using thermionic cathodes as electron sources. such conventional x - ray tubes have some defaults, such as big volume, low frequency response, demanding for supply to cathode that was also brittle
目前使用的x光源的基本特點是採用熱電子發射形式即採用熱燈絲作為電子發射源，在高壓加速下轟擊陽極產生x射線，這樣的光源體積較大，需要加熱陰極的電源，且對頻率響應慢。Zhou of the uniersity of pennsylania, philadelphia, and colleagues reiewed noninasie imaging modalities to track implanted cells, including magnetic resonance imaging ( mri ), positron emission tomography ( pet ), single - photon emission computed tomography ( spect ), and optical imaging using luminescence and fluorescence
這包括磁共振影像學（ mri ） ，正電子發射斷層掃描術（ pet ） ，單光子發射計算體層攝影術（ spect ）和使用發光和熒光的光學成像術。To find a proper and convenient way in electron emitter research, in the paper, we have discussed the essential and possibility of setting up a new pld ( pulsed laser deposition ) device which connects with aes ( auger energy spectra ), and built such device in order to complete cathode deposition and analysis without exposing to the atmosphere and carried out cathode in - situ preparation and analysis electron emission phenomenon is a physical process taken place in surface of electron emitter
為了解決電子發射體（陰極）研究方法中存在的問題，並尋求一種適當的、方便的陰極研究實驗方法，本論文論證了建立與aes相連的pld裝置的必要性和可行性，並實際建立了這一裝置，實現了陰極的原位沉積、原位分析。電子發射現象是在電子發射體表面發生的物理過程，發射表面是由活性元素構成的動態平衡系統，這一系統直接決定電子發射性能。表面分析手段對陰極研究是必不可少的。In this paper ， first, the author drew some important conclusions by analyzing several technical factors and experimental conditions which would have great influence on the quality of diamond thin films during mpcvd process ， including gas proportion ， the power of microwave ， the plasma ' s location, the nucleation technique, etc. finally ， the author has successfully deposited nanocrystalline diamond thin films with 300nm crystal particles on the slick surface of silicon by using ch4 / h2 gases in the mpcvd system ， and the nanocrystalline diamond thin films was proved to have good field emission performance. all these researches will make the foundation for the field emission cathode of diamond films
本論文中，作者分析了mpcvd方法中氣源成分比、微波功率、等離子體球的位置、成核技術等各種工藝條件對金剛石薄膜質量的影響，並總結得到了一些有意義的結論；同時，在自行研製的mpcvd沉積系統上，於4 - 7kpa 、 1000左右的熱力學條件下，採用ch4 / h2氣源氣氛在光滑的硅襯底上制備出了晶粒尺寸在300納米以下的納米晶金剛石薄膜，測試得到了較好的薄膜場致電子發射性能，為金剛石薄膜場致發射冷陰極的研究工作打下了實驗基礎。The properties of these doped powders, the microstructure and composition of these rare - earth co - doped tungsten matrices and cathodes have been investigated by size analysis, xrd, sem and edax. the electronic emission performances of these cathodes are measured in uhv electron emission surveyor. aes is adopted to analyze the atom composition and diffusion behavior of active elements on cathode surfaces
通過粒度分析、 xrd 、 sem 、 edax研究了摻雜粉末的特性、燒結基體和陰極的微觀結構和成分;用動態真空電子發射測試儀對上述陰極進行了電子發射水平的測試;採用aes對陰極表面原子組成和活性物質的擴散行為進行了研究，分析了陰極發射水平與表面原子組成的關系。Positron emission tomography ( pet ) is a non - invasive method to detect the distribution of radionuclide in vivo
正電子發射體層攝影術是一種無創性的探測生理性放射性核素在機體內分佈的斷層顯像技術。Investigation on the process of the electrons emission from a diode with a ferroelectric cathode
強流鐵電陰極二極體電子發射過程研究分享友人