預激射 的英文怎麼說
中文拼音 [yùjīshè]
預激射
英文
prelasing-
Fundamental of laser 40ar / 39ar dating method : our laboratory has successfully set up the laser microprobe 40ar / 39ar geological dating method. our works include adjustment of the high - gain electron multiplier in mass spectrometer and correction of mass discrimination, adjustment of the laser, test for absorption ability of minerals to laser, designing and manufacturing high - vacuum sample chamber, sample preparation and irradiation, research on the variability of j values on the surface of rock chips, measuring atmospheric argon, determination and correction of blanks and ages, etc. the laser microprobe technique is particularly effective for some geological samples. it can be used, for example, for research of distribution of the components in extremely small samples that are very difficult to be separated and purified and those which contain excess argon
本文首先從常規~ （ 40 ） ar ~ （ 39 ） ar階段升溫定年實驗室的改進入手，進而建立了激光~ （ 40 ） ar ~ （ 39 ） ar定年實驗室，利用這兩種先進同位素地質定年方法，結合其他手段，對青藏高原腹地和北緣的阿爾金斷裂系多期地質事件進行了詳細的同位素年代學研究：一、參照國際先進實驗室的流程，對我們的常規~ （ 40 ） ar ~ （ 39 ） ar階段升溫實驗室在樣品的預處理、樣品的照射條件和系統空白測量及校正等方面進行了改進，使之產出的同位素年代數據更可靠並為國際同行所承認。The front part of the forward handgrip on p90 is shaped as hand protector, and it can contain integral laser aiming module, which sends either visible or ir laser beam to mark the intended target
前面部分向前p90握在手形作為保護者它可容納積分雷射瞄準艙而無論有形或紅外激光束傳遞慶祝預定目標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。The energy level structures of the 4d core excited configuration 4d 5s25p5, final radiative configuration 4d105s25p4 and final auger configurations 4d105s25p3 and 4d105s15p4 of csv ion and all possible decay dynamics processes related to these configurations are all determined by mcdf method. we also compared the present results of radiative transition, oscillator strength and the line width with the results obtained by experimental spectra and the quasi - relativistic configuration interaction method and got a good agreement. we also make prediction for some dominant features of the auger electron spectrum emitted by the auger decay process of the 4d95s25p6 core excited states
論文第三章中詳細的介紹了cs離子的4d內殼層電子激發組態4d ~ 95s ~ 25p ~ 5 、輻射末態4d ~ （ 10 ） 5s ~ 25p ~ 4及auger末態4d ~ （ 10 ） 5s ~ 25p ~ 3和4d ~ （ 10 ） 5s5p ~ 4的能級結構及各種可能的輻射和auger衰變過程，獲得了與已有的實驗結果和相關的半經驗準相對論組態相互作用計算結果相符的輻射躍遷能、振子強度以及線寬，預言了4d ~ 95s ~ 25p ~ 5態的以auger衰變為主的auger電子譜的特性。The peak in the direction of the target normal is consistent with mat of predicted by the resonance absorption and another peak of hot electrons emission in the specular reflection direction is due to the multi - acceleration mechanisms. the hot electrons emission along the back - reflection direction is probably caused by the acceleration of the back - reflection laser, which is for the first time put forward by us
其中，靶法線方向的超熱電子發射峰與共振吸收（ res ~ eabso甲tion ）機制所預言的一致;根據理論估算提出激光反射方向的超熱電子發射峰是幾種加速機制共同作用的結果;我們首次提出背反射激光加速超熱電子的新機制，並用此機制解釋了激光背反射方向產生的超熱電子發射峰。In this paper, such three points are studied as : a ) the angular distributions of the hot electrons emission under laser irradiation at different incidence angles and at different polarization direction, the angular distribution of the hot electrons in the different energy range, and the effects of laser prepulse on the angular distributions of the hot electrons emission ; b ) the energy distribution of the hot electrons at different directions, from the metallic targets and the dielectric targets, in the different energy range of the hot electrons, and the effects of the atomic number z on the energy distribution of hot electron generated by the metallic targets ; and c ) the energetic proton emission resulting from the interaction of the us - ui laser pulse with plasma
本論文進行了三個方面的研究：第一，超熱電子角分佈的研究，包括不同激光入射角下超熱電子的角分佈；激光不同偏振態下超熱電子的角分佈；激光預脈沖對超熱電子角分佈的影響；不同能段的超熱電子的角分佈。第二，超熱電子能量分佈的研究，包括不同方位超熱電子的能量分佈，金屬與非金屬靶材的超熱電子的能量分佈，金屬原子序數z對超熱電子能量分佈的影響以及不同能段超熱電子的能量分佈。第三，研究了超短超強激光與固體靶相互作用所產四川大學博士學位論文生的高能質子發射和能譜。The optimum intervals between the two pulses is about 1. 7 in our simulation which is much longer than the commonly cited value 1. 5. 3. in the sm - lwfa simulation, we turned our attention to the wakefield generation and electron acceleration driven by the " self - modulated instability " and " side stimulated raman scattering "
我們首先提出「三角脈沖激發尾流場加速電子」的方案，利用「三角脈沖」平緩的上升沿激發「受激raman散射」預加熱電子，其陡峭的下降沿激發尾流場可以使更多的電子被「捕獲」 。Not having reckoned on meeting the enemy at the stream, and coming upon them unexpectedly in the fog, not hearing a word of encouragement from their commanding officers, with a general sense of being too late, and seeing nothing before or about them in the fog, the russians fired slowly and languidly at the enemy, never receiving a command in time from the officers and adjutants, who wandered about in the fog in an unknown country, unable to find their own divisions
因為俄國人沒有預料到在山下的河上會遇見敵人，他們在大霧之中意外地碰上敵人了，他們沒有聽到最高首長激勵士兵的話，部隊中普遍存在著一種意識：已經遲到了。主要是，在濃霧之中看不見自己前面和周圍的任何東西，俄國人懶洋洋地行動遲緩地和敵人對射，向前推進一點，又停下來，沒有及時地接到首長和副官的命令，他們沒有去找自己的部隊，卻在霧氣沉沉的不熟悉的地區徘徊尋路。With a purpose to provide basic data or figures for the feasible research of a project construction and its planning, taking the practical project of preselecting a factory location for an instance, using the principle and method of shallow seismic reflection, based on the area conditions, differences in physical features and disturbance, with experiments on typical sections of the construction area, one can draw reasonable measuring lines, choose right modes of producing and receiving waves, conduct primary and precise computer data processing, acquire a distinct reflected wave section from a shallow depth and explore the stratum structure in the preselected location and the distribution of longitudinal waves
摘要結合某重大工程預選廠址項目的工程實例，利用淺層地震反射波法的原理和方法，根據現場的場地條件、物性差異和干擾情況等，結合典型地段的試驗，合理布置測線，選擇恰當的激發和接收方式，進行初步和精細的計算機資料處理，可以得到清晰的淺層反射剖面，準確地查明了預選廠址的地層結構和縱波速度分佈，為工程建設的可行性研究和規劃提供了基礎資料。Using this expression, the interrelation of the carrier density in each segment and the emission wavelength can be predicted while the laser is lasing
該表達式可以用來預測激光器激射工作時，兩段載流子濃度和激射波長之間的相互關系。Pre - recorded optical reflective videodisk system. " laser vision " 50 hz 625 lines pal
預錄制的光學反射視盤系統. 50 hz 625行pal制"激光視盤Specification for pre - recorded optical reflective videodisk system " laser vision " 50 hz 625 lines - pal
50hz 625行預錄式光反射視盤錄像系統"激光視盤" . pal制規范Pre - recorded optical reflective videodisk system " laser vision " 50 hz 625 lines ; pal iec 60856 : 1986 a1 : 1993 ; german version en 60856 : 1993 a1 : 1993
"激光視盤」 50hz 625行預錄光學反射視盤系統. pal制Pre - recorded optical reflective videodisk system " laser vision " 50 hz 625 lines ; pal iec 60856 : 1986 a2 : 1997 ; amendment a2 ; german version en 60856 : 1993 a2 : 1997
50hz 625行的預錄制的光學反射"激光可視"視盤系統. paHowever, the emission wavelength of a dfb - ld needs to be carefully turned on the predetermined wavelength grid by adjusting both laser temperature and bias current. furthermore, dfb - ld has such drawbacks as a relatively large variation of the lasing wavelength with ambient temperature ( ~ 0. 1nm / c ) which restricts its application in dwdm systems
然而dfb - ld的激射波長受溫度（ 0 . 1nm ）和偏置電流的影響較大，只有通過調節dfb - ld的溫度和偏置電流，其激射波長才能被調諧在預置的波長處。Usually, it is thought that the lasing wavelength of a fgesl is locked at the bragg reflection wavelength of fiber grating ( fg ). owing to a relatively small dependence of the reflection spectrum of fg on ambient temperature ( - 0. 01nm / c ), the lasing wavelength of a fgesl is thought to behave more stable than that of a dfb - ld
由於fgesl的激射波長主要由光纖光柵（ fg ）的布拉格波長確定，因此選擇具有合適布拉格波長的fg就能使fgesl的激射波長處于預置波長處；同時，由於fg的布拉格波長受溫度變化的影響相對較小（ 0 . 01nm ） ，因此fgesl與dfb - ld相比具有更高的溫度穩定性。分享友人