均勻激波 的英文怎麼說
中文拼音 [jūnyúnjībō]
均勻激波
英文
uniform shock wave-
In conclusion, a laser target shooting setup utilizing one single laser beam homogenized by isi with image relay based on the krf laser " heaven i ", laser beam diagnostics and shock - emission detection with streak camera have been established
中國原子能科學研究院博士學位論文本工作的主要結果是:在「天光一號」一路is工均勻化krf激光的基礎上，建立了打靶手段、光束診斷手段、沖擊波測量手段。Chapter 5, short but is the core of this paper. the flatter impact shock generated by a homogenized beam by isi with strict image relay, and a round - shaped impact shock generated by isi without strict image relay, is compared. it reveals the importance of isi with strict image relay in planar shock generation
第五章重點介紹了激光產生飛片的實驗，分別給出了利用空間誘導非相干（ isi ）激光均勻化技術，在有嚴格的像傳遞和沒有嚴格的像傳遞條件下激光驅動飛片產生沖擊波的特徵，表明isi均勻化技術和像傳遞在產生平面沖擊波中的重要性。In order to utilize the frquency resource adequately and increase the capacity of mobile communication system, the wireless electric wave propagation of existing mobile system always adopts the microcell structure. forecasting the path loss characteristic of electric wave accurately can provide the necessary condition for the layout and design of wireless network, at the same time it is a precondition for the research on the microcell mobile system. the methods of forecasting of wireless electric wave propagation can divide into two parts : one is pluse and respond, that is establish the empirical model based on experimental and statistical data ; the other is ray tracing method, that is establish the deterministic model based on theoretical analyse. the paper discuss the characteristic of wireless signal electric wave transmition in symmetrical atmosphere of earth, and introduce the common path loss transmition model in land mobile communication system, also point out the localization of these models based on experiential methods
而精確預測無線電波傳播路徑損耗特性，則為合理的微蜂窩無線網路規劃、設計提供了必要條件，同時也是研究微蜂窩移動通信系統性能的前提。無線電波傳播預測的方法分為兩類：一是用沖激響應法，即根據實驗、統計所得數據建立經驗性傳播預測模型；另一種是用射線跟蹤方法，即依據理論分析來建立確定性的傳播預測模型。本文首先討論了在地球表面均勻大氣中的無線電波傳播的基本特性，介紹了陸地移動通信系統中常用的幾種電波傳播路徑損耗經驗性預測模型，並指出了這些經驗性傳播模型對于微蜂窩小區無線電波傳播特性研究的局限性。For the purpose of estimating 2 - d doa of uniform circular array ( uca ), phase mode excitation based uca beamforming is employed to obtain real - valued beamspace manifold
對均勻圓陣列（ uca ）二維波達方向估計問題，運用相位激勵模式波束形成技術，得到圓陣波束空間實值陣列流形。However, the msw - based mo devices haven ’ t still been applied extensively up to now because of low bragg diffraction efficiency. the generation and propagation characteristics of magnetostatic forward volume waves ( msfvws ) under nonuniform bias magnetic field and the bragg diffraction efficiency of gows with the msfvws are theoretically studied in this paper
本論文主要從理論上研究不均勻場中靜磁正向體波（ msfvw ）的激發與傳播特性，以及不均勻偏置磁場在提高靜磁波對導波光的bragg衍射效率方面所起的作用。The influence of msfvw bandwidth on the diffraction efficiency is also considered. for the nonuniform bias magnetic field of u - type parabola profile, when the msw frequency is less than the cut - off frequency at the edge of mo film, the effective mo interaction length reduces. the edge cut - off frequency is determined by the maximum of the nonuniform field
對于拋物型分佈（開口向上）的偏置磁場，當激發靜磁波的rf頻率小於邊緣截止頻率時，磁光作用的有效長度減小（與靜磁波頻率有關） ;邊緣截止頻率由不均勻磁場的最大值決定，靜磁波的下限截止頻率由不均勻場的最小值確定。The tests of e - o applications by our flux ktp has been realized, the results showed : optical waveguides fabricated by using an ion - exchange process, which have an exchange - ion concentration depth profile and refractive - index profile, is close to a complementary error - function distribution, optical homogeneity and device thermal stability is much better. amplitude modulation switch formed by our flux ktp has the contrast ratio of 150 : 1 and insert loss is 2. 5 % at 1064 nm. high quality optical pulse with 1 ns width was cut successfully by using an e - o modulator from a laser pulse with 50 ns width, this modulator had run for three years, and the crystal did n ' t blackened, it showed our low conductivity flux ktp can endure high modulation voltage for a very long time
Ktp晶體的電光應用試驗表明：用離子交換法製作的電光波導，其離子交換濃度、折射率變化符合餘弦誤差函數，光學均勻性以及器件的溫度穩定性較好；製作的強度調制電光開關，消光比為150 ： 1 ，對1064nm激光的插入損耗為2 . 5 ；製作的電光調制器用於激光脈沖整形試驗，從脈沖寬度50ns的激光脈沖削出脈寬1ns的高質量光脈沖，該電光開關經過長達三年多的使用，沒有出現晶體變黑現象，說明本實驗的低電導率ktp晶體能夠耐受長時間的調制電壓。The resonant box effect is the most important. in chapter five, we use the experimental setup constructed and the cavity decay time method to measure the total loss of a passive resonant cavity, and analyse the experimental data in very detail. we conclude that, in present experimental conditions it is the uniformity and stability of laser mirror to confine the precision and repeatability of experimental results
第五章在建立起了連續光波時間衰減法測量裝置的基礎上，進行了無源諧振腔總損耗的測量，仔細分析了實驗過程中的誤差因素，並指出在目前的實驗條件下限制測量精度和重復性的主要原因是激光鏡片的均勻性和穩定性不理想。It uses the encouragement of step wave or other impulse current field source to produce the transition process field in earth. in the moment of shutting the power it produce the volute alternating electromagnetic field. from the abnormity of measuring the attenuation character of the second induction electromagnetic field, which produced by underground medium with time change, the conductive capacity and the position of the underground non - homogeneous substance can be analyzed
瞬變電磁法（ transientelectromagneticmethod ）是一種時間域的電磁勘探方法，利用階躍波或其它脈沖電流場源激勵，在大地產生過渡過程場，斷電瞬間在大地中形成渦旋交變電磁場，測量這種由地下介質產生的二次感應電磁場隨時間變化的衰減特性，從測量得到的異常分析出地下不均勻體的導電性能和位置，從而達到解決地質問題的目的。Most of partial differential equation arising from physical or engineering science can be formulated into conservation form : it directly reflects conservation laws in natural sciences. from viewpoints of fluid dynamics, it can be obtained from the mass, momentum, energy conservation laws. because the form ( 0. 2. 1 ) has no other terms such as dispersion, diffusion ( caused by nonuniformity of some physical states ), reaction, memory, damping and relaxation etc, smoothness of solution of ( 0. 2. 1 ) may be loss as times goes on. even for the smooth inital data, solutions of ( 0. 2. 1 ) become discontinuous in a finite time
由於雙曲守恆律（ 0 . 1 . 1 ）沒有其它項，如色散（ dispersion ） ，擴散（ diffusion ） （某物理量分佈不均勻引起的輸運） ，反應（ reaction ） ，記憶（ memory ） ，阻尼（ damping ）及鬆弛（ relaxation ） （描述非平衡態）等，而僅有輸運或對流項（ convection ） （由於流體的流動引起的輸運）時，守恆律（ 0 . 1 . 1 ）的解失去光滑性（這里不特殊說明守恆律就指該意義下） ，甚至即使光滑的初始數據，解隨著時間的發展會變成不連續，這在物理上表現為激波的形成。分享友人