pulse of the fields 中文意思是什麼
pulse of the fields
解釋
原野的脈動-
In the summarize of plasma propulsion and discharging in water and exploding wires phenomenon, this paper combines technology in three fields hereinbefore. an experimental pulse plasma propeller model has been designed
本文在對等離子體推進、液中放電和爆炸絲現象綜述的基礎上，將這三個領域的技術結合在一起，研製出實驗用水中脈沖等離子體推進模型。 -
The positive and negative frequency expressions of quasi - monochromatic optical fields of a pulse in fiber - optic communication and the positive and negative frequency forms of fourier transformations and nonlinear schr ? dinger ( nls ) equations are discussed
摘要討論光通信中脈沖的準單色光光場的正負頻表示，正負頻形式的傅里葉變換，正負頻形式的非線性薛定諤方程及它們之間的關系。 -
As far the trend of fiber - optic communication systems is to obtain higher capacity, and higher transmission speed. the intensity modulator is widely applied to a lot of fields. it is necessary for the intensity modulator subject to the laser pulse rectification systems that should be provided with following performances as high speed signal transmission and quick response and so on
光纖通信向著大容量、高速寬帶方向發展，光纖延遲線系統要求強度調制器具有高速信號傳輸、快速響應的特點，因此以linbo _ 3為襯底材料的集成光學強度調制器具有十分良好的應用前景。 -
The interaction of stable plane wave and electromagnetic pulse fields with human body is studied in this paper based electric field stress
本文從電場應力的角度研究穩態平面波和脈沖波對人體的作用。 -
The essentially universal biophysical phenomenon of " electroporation " occurs if an appropriate pulse field is applied. electroporation is believed to be the rapid creation of aqueous pathways through lipid - containing barriers in cells and tissue. the driving force is the physical interaction of electric fields with different dielectric constants
電穿孔效應是指在適當高壓脈沖電場作用下，細胞或組織間起相對隔離作用的「屏障」內快速形成液態通道的現象，是電場與具有不同介電常數而且易變形的物質相互作用的結果。 -
The conformal microstrip antenna with some unique character has been applied in many fields, especialy on speedy objects. in this paper, an efficient fdtd algorithm is introduced to analyse the microstrip antenna. firstly, the fdtd formula in descartes coordinate system and in cylindrical coordinate system are obtained from the time _ dependent maxwell equations using the yee algorithm in a calculating region where the dielectric parameters are independent of time and space. the choice of the space discretization units and the time discretization interval are discussed which are decided by the accuracy and stability respectively. the shape and setup of the excitation source are discussed too. the excitation source is chosen to be gaussian pulse in shape. secondly, the mur ' s first - order and second - order boundary condition are deduced in cylindrical coordinate system. the methods of transforming radiation fields from near zone to far zone in the frequency domain and in the time domain are presented when fdtd is applied to analyse the characteristics of far zone. finally, three kinds of microstrip antennas are analysed. they are a slot antenna that lies on a plane ground of a microstrip, a slot antenna that lies on a cylindrical ground of a microstrip and a microstrip line _ fed aperture coupled stacked rectangular patch antenna in cylindrical coordinate system
本文從麥克斯韋旋度方程出發，建立了笛卡兒坐標下無源空間中均勻無耗媒質的fdtd基本方程和圓柱坐標下無源空間中均勻無耗媒質的fdtd基本方程，詳細討論了fdtd法計算中時間步長和空間步長的選取原則以及激勵源的類型和設置；推導了mur一階和二階邊界條件在圓柱坐標下的差分格式；給出了在用fdtd法計算天線的遠場輻射特性時必需採用的頻域和時域近場遠場變換技術；最後用fdtd法計算了平面微帶縫隙天線、柱面共形微帶縫隙天線和柱面共形微帶層疊天線的輸入阻抗和遠區輻射場，並分析了天線的一些參數的變化對天線輸入阻抗的影響，得出了一些有用的結論。 -
The let factors rlet ( rlet = 0. 05 ) of neutron response for liftld in various n + y mixed fields in the fast neutron reactor have been determined experimentally due to the existing let effects of the response for liftld to neutron absorbed dose. the experimental results show that the let factor for neutrons from thermal energy to 5mev energy is about 0. 050. so it is workable to measure the photon fluence in the pulse reactor with 7liftld
為確定liftld能否用於n 、混合場的區分測量，本文定義了let效應因子，並對liftld的let效應因子進行了實驗測定，測量結果表明： liftld對熱中子至5mev中子響應的let效應因子值約為0 . 050 ，因此，選用~ 7liftld用於脈沖堆光子注量測量是可行的。 -
Stepper motor is a kind of electromechanical component that is driven in step angle or line displacement by electric pulse signal. because of having the advantage of easy open - loop control and no accumulating error, stepper motor is being applied widely in many fields
步進電機是一種將電脈沖信號轉換成相應的角位移或線位移的機電元件，具有易於開環控制、無積累誤差等優點，在眾多領域獲得了廣泛的應用。 -
With the development of mode - locked laser, the pulse ’ s width becomes narrower and narrower, and exhibits more and more applications in many fields. obviously, these developments and applications demand improvements of measurement of pulse
隨著激光鎖模技術的不斷發展，激光脈沖的寬度越來越窄，從而得到了越來越廣泛的應用，這就要求脈沖測量手段不斷提高。 -
Thanks to the support of the national natural science foundation of china under grand no. 50277036 for " the pulse electromagnetic fields and system - level em radiation of electric vehicles ", this thesis concentrated on the design of the variable voltage and variable frequency ( vvvf ) system and the development of a genetic algorithm for vector optimal design problems. the work includes mainly four parts : a brief introduction of the frequency - converter, the emc design of the vvvf system and the national standard of the electromagnetic interference of the vvvf system, the study of global search optimization algorithms, and an improved genetic algorithm called emigration genetic algorithm for multi - objective optimal problems
在國家自然科學基金資助項目《電動汽車脈沖電磁場與系統級輻射的研究》的工作基礎上，本文對電動車電磁輻射關鍵部分? ?變頻調速系統的電磁兼容性設計以及在電磁兼容性設計中涉及到的電磁系統的多目標優化方法進行了系統的分析和研究，其核心內容包括：變頻器工作原理；變頻調速系統電磁兼容性設計及變頻調速系統電磁兼容標準；隨機類全局優化演算法研究；提出了一種改進的遺傳演算法命名為遷徙遺傳演算法。 -
Inherently, how to seize the opportunity to explore the characteristics, including historical gentle pulse, cultural tradition, national religion, the economy and industry, resource and environment of the town fully, to construct characteristic towns which possess graceful environment, prosperous economy, stable society and distinctive features, is the way of improving region image, the investment climate and ecological environment, and it is the key of driving the area to sustainable, fast and coordinate development as soon as possible, and it is also one of the ways to narrows disparity between the west area and the whole country in various fields
如何抓住機遇，充分發掘城市的歷史文脈、文化傳統、民族宗教、經濟產業、資源環境等特徵和內涵，建設環境優美、經濟繁榮、社會穩定、特色鮮明的城鎮，是盡快改善地域形象，改善投資環境、生態環境，實現區域持續、快速、協調發展的關鍵，也是西部地區縮小與全國在各方面差距的重要途徑之一。 -
After analyzed the limitation of dijkstra algorithm and genie algorithm, a pulse coupled neural networks ( pcnn ) algorithm is proposed. pcnn provides group similarity, synchronous exciting and auto - wave generation characters, and is widely researched and applied in image processing, target identification and optimization fields
脈沖耦合神經網路提供了分組類似性、同步激發和自動波的形成與傳播等一系列基本的特性，並在圖像處理、目標的自動辨識和組合優化等領域中得到了廣泛的應用和研究。 -
The pulse / pattern generator has been wildely used in modern measuring and controlling fields, it can generate kinds of standard pulse signals and programmable user data to meet some special digital measuring requirements. and the digital waveform generating part, which can generate digital waveforms in given working modes, is the core of a pulse / pattern generator
脈沖/數據發生器是現代測量與控制中常用的信號源，它可以產生各種標準的脈沖波形和具有一定編碼規則的用戶數據，用來滿足特定數字測試要求，而數字波形產生部分是脈沖/數據發生器中的核心部分，承擔著產生各種模式的脈沖數字波形的任務。 -
This paper has analyzed the characteristics of near - field electromagnetic fields and the measurement principle of magnetic - field sensor, and designed probe, amplifier unit and compensator according to measurement needs. finally, based on the electromagnetic pulse simulator in the lab, a set of experiments have been done on the designed magnetic fields measurement system and analyzed the error of the measurement system
文中分析了近場電磁場分佈的特點；研究了磁場探頭的測量原理；根據實際測量需要製作了磁場探頭、設計了信號放大單元和用於補償電纜信號衰減的補償器；最後利用實驗室的電磁脈沖模擬器對所設計的磁場測量系統進行了一系列實驗，分析了系統的測量誤差。 -
The research of electromagnetic missile and the slow - decay effect is the advanced task of the electromagnetism, which can be widely used in many fields : ultra - wide radar, ultra - wide secrecy communication, high - power microwave and etc. the detailed analysis of the slow - decay effect of pulse propagation is presented in this paper
電磁導彈及有關慢衰減電磁波的研究是當前電磁學的前沿課題之一，其應用領域十分廣泛，如超寬頻帶雷達、超寬保密通信和高能微波等。本文對脈沖傳播慢衰減特性進行了詳盡分析。
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