例句與用法

1. the main results are as follows : 1 . the propagation of an ultrashort intense pulse laser beam in low-density plasmas is investigated analytically . relativitistic pondermotive force and space-charge effects are included, and an equation describing the evolution of the laser spot size is derived
   考慮有質(zhì)動力與電荷分離場的平衡，推出了超短超強(qiáng)脈沖激光在低密度等離子體中的折射率、電子密度和電荷分離場的表達(dá)式以及激光束斑的演化方程。
2. ultrashort intense laser pulse propagation in low-density plasmas and air xiao yuan, doctor of philosophy, 2002 dissertation advised by : lu baida, professor of physics the study of ultrashort intense pulse laser beams in low-density plasmas and air is relevant to a wide range modern application
   超短超強(qiáng)脈沖激光在低密度等離子體和空氣中的非線性傳輸是當(dāng)今強(qiáng)激光與物質(zhì)相互作用研究的一個(gè)重要課題。本論文闡述了超短超強(qiáng)激光在低密度等離子體和空氣中的長距離自聚焦和自導(dǎo)引效應(yīng)。
3. when passed through the beam-splitter, a pulsed laser beam was split into 3 beams with an interpulse delay of 13 ns . these 3 separated laser pulses reach the m-z interferometer at different time and each laser pulse gave a snapshot of the implosion state . thus three different-time interferograms can be obtained in one shot of z-pinch
   激光器發(fā)出的光束經(jīng)過分光系統(tǒng)被分成時(shí)間間隔13ns的三束光，它們于不同的時(shí)刻先后到達(dá)m-z干涉儀，每一束激光脈沖可以記錄下等離子的一個(gè)狀態(tài)，從而可以得到三幅不同時(shí)刻的干涉圖。
4. in the master thesis, the fatigue characteristics of the ferroelectric films under thermal load and electrical load were investigated . the thermal load was induced by a pulse laser beam of nd : yag and the electrical load was made by rt6000s ferroelectric tester t o act on the films respectively . the effect of thermal or electric loads on the films properties was discussed
   本文對鐵電薄膜在循環(huán)的熱載荷和電載荷作用下的疲勞特性進(jìn)行了研究，分別用nd：yag脈沖激光器模擬熱載荷、用rt6000s鐵電測試儀模擬電載荷作用于鐵電薄膜，根據(jù)實(shí)驗(yàn)結(jié)果探討了這兩種載荷對鐵電薄膜性能的影響。