電荷線密度 的英文怎麼說
中文拼音 [diànhéxiànmìdù]
電荷線密度
英文
linear charge density-
Contour map of charge density
電荷密度等值線圖Without considering other aspects, carbon nanotubes with the same aspect ratio have entirely uniform trend in charge density relative distribution curve
在忽略其他條件影響下，長徑比相同的碳納米管，電荷密度相對分佈曲線趨勢完全相同。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。The subject of this thesis is to study ironless moving coil linear permanent magnet synchronous motor and the major works in this thesis are summarized as follows : 1 ) two analytical formulas are derived by concentrated current method and distributed current method to determine the magnetic field due to pm, based on the current model of pm. besides, two method ( magnetic charge method and solution by laplace equation method ) are also introduced with comparing their advantages and disadvantages. then the effects of the motor parameters on the flux distribution are discussed
本文對空芯動圈式直線同步電動機進行了深入細致的研究，內容包括： （ 1 ）採用電流模型推導出兩種計算永磁磁極二維氣隙磁場的解析公式（集中電流法、分佈電流法） ，同時介紹了兩種永磁電機氣隙磁場計算方法（磁荷法，直接求解拉氏方程法） ，分析各種方法的優缺點，討論電機參數對氣隙磁密的影響； （ 2 ）介紹了單層同心繞組的布置方式，根據安培定律推導出空芯動圈式直線永磁同步電動機的靜推力計算公式，分析靜態力?位移特性； （ 3 ）建立空芯動圈式直線永磁同步電動機動態模擬模型，模擬不同驅動方式下電動機起動、穩態運行時電磁力、速度、位移的變化情況。Three phase dry type power transformer, which make it with those features : safety, reliability, and energy saving, fireproof, flameproof, simple maintenance etc., the design is advanced ; the structure of products is reasonable and the outline is fine, the main performances of the products are much better than the national standards, for example, partial discharge level no - load loss, on - load loss, noise level, it is adaptable for application on heavy humidity and severely pollute places which are near to lake, sea and rive, as well as, high demand - fireproof, heavy load capacity place, such as : high building, airport, station, port, underground, hospital, electrical power station, metallurgy, shopping center, residential area and petroleum chemical industry, nuclear power station, nuclear - powered submarine
非包封線圈三相干式變壓器，具有安全可靠節能防火防爆維護簡單等優點。其設計先進結構合理外形美觀。主要性能指標均優于國內標準，如局放水平空載損耗負載損耗噪聲以及能適應高溫度環境使用等，可安裝在靠近湖海河邊污穢潮濕的環境及防火要求高負荷較大的地區，適用於高層建築機場車站碼頭地鐵醫院電廠冶金行業購物中心居民密集區以及石油化工核電站核潛艇等場所。We can obtain the trap density by measuring the change of gate voltage of mos capacitance under constant current stress and the change of high frequency c - v curve before and after the stress
該方法根據電荷陷落的動態平衡方程，測量恆流應力下mos電容的柵電壓變化曲線和應力前後的高頻cn曲線變化求解陷階密度。Considering the geometrical figure of tube and tip, we calculated the surface charge density relative distribution curve of metallic carbon nanotube
摘要考慮碳納米管尺寸及端帽形狀，計算得到了比較精確的金屬型納米管表面電荷密度相對分佈曲線。Furthermore, we studied the influence of length, radius and aspect ratio on the charge density relative distribution curve, showing that length and radius play an important role in relative charge distribution of tube and in tip respectively
進一步研究了長度、半徑和長徑比對電荷密度相對分佈曲線的影響，表明長度主要影響管身電荷密度相對分佈，半徑主要影響尖端電荷密度相對分佈。It put out the system requirements from the whole structure, function structure, developing mode, user management, the design of software and database, safety design, system running efficiency, developing plan, etc. it put out the basic graphics operation, the module building and editing of the electrical network, the devices records and function management the devices operating management, the function producing the electrical subject chart, the outside interface function, the in - out function and webgis, etc. it discusses some advanced functions including the theory loss and practical loss computing of the distribution line, the reliability basic data producing and conversing tools, power cut management, the load supplying from other ways, the repairing management on user fault reports, th e new load installing assistant function, the management of hanging the cards and simulating operation, the monitonng and analyzing management of the running information, load monitoring and load density analyzing function and so on
從系統總體結構，功能結構，開發模式，用戶管理，軟體和數據庫設計，安全性設計，系統運行效率，開發計劃等方面滿足了系統的總體要求；系統實現了基本圖形操作，電網建模與編輯，設備臺帳及運行管理，設備操作運行管理，電力專題圖生成，外部介面，輸入輸出， web - gis等基本功能;系統還具有配電線路理論線損計算及實際線損計算，可靠性基礎數據生成和數據轉換工具，停電管理，負荷轉供功能，用戶報修管理，用戶報裝輔助，掛牌管理和模擬操作，運行信息分析監控管理，負荷監控及負荷密度分析等高級功能:並能從運行方式，用戶權限，運行日誌三個方面闡述本系統的管理方式。系統總體結構合理，功能及介面齊全，配置擴展方便，可操作性強。In order to deal with the nonlinearity and hysteresis of piezoceramics, a precise power amplifier circuit with charge - feedback loop was developed. and an electromechanical model of piezoelectric actuator is presented to demonstrate that charge - feedback control is prominently effective to reduce hysteresis, creep and to improve linearity
本文針對壓電陶瓷存在非線性與滯后的問題，根據電荷反饋原理設計了精密功率放大電路和電荷反饋迴路;建立了壓電作動器的機電模型，證明了電荷反饋控制對于減小回滯現象、提高線性度有明顯的作用。Namely, the electric field at the drain - side edge of the gate decreases with the increasing of negative charge density in the surface, so the breakdown voltage of gaas mesfet ' s will increase
表面受主態的增多使表面負電荷密度增大，表面聚集的負電荷可以分散漏側柵邊緣處的電力線密度，減弱了柵靠漏一側的電場強度，擊穿電壓提高。分享友人