He-S2(B3∑-u→X3∑-g) van der Waals体系的从头计算

利用多参考组态相互作用方法计算得到了He-S2(X3∑-g)与He-S2(B3∑-u)的势能曲面;计算并讨论了He原子与S2分子的相对位置R与S2(B3∑-u→X3∑-g)跃迁矩和诱导偶极矩变化的关系;分析了He对S2分子轨道的压缩随R的变化,以及在实验中加入缓冲气体对实现S2分子发光的影响.     

三脉冲功率系统模块

采用基于并联Blumlein脉冲形成线的MHz重复频率脉冲功率技术和基于激光触发气体开关的多级触发系统,设计了脉冲功率系统模块,该模块具备6路输出能力,每路均可以MHz重复频率猝发方式输出三脉冲,幅度可达300 kV。对模块中的Blumlein装置、脉冲汇流、隔离网络、触发系统等部件参数进行了设计。以多脉冲直线感应加速器感应腔作为负载,对该模块的性能进行了分析,结果表明:模块中每个脉冲的输出时间抖动小于2.3 ns（标准差）,脉冲间最小时间间隔大于500 ns时可在负载上获得高品质波形。     

在物理习题教学中提高学生思维能力的策略研究

在高中物理教学中,习题教学是整个物理教学的一个重要环节,是学生运用所学知识解决实际问题的初步实践.它对学生深入理解物理知识,培养学生的思维能力都具有不可替代的作用.但是常见的现象是在习题教学中过多地强调知识、规律,方法的渗透很少,更别说是思维能力的培养.那么如何在物理习题教学中提高学生思维能力,笔者结合自己的教学实践,提出了以下三项策略:选择易错习题,提高学生的推理能力;暴露错误知识,提高学生的判断能力;挑战思维定势,培养学生的创新思维.     

High-order harmonics in static gas target by 795-nm Ti:sapphire femtosecond laser pulses

The 5th - 23sd high-order harmonics generation in rare gases in static gas target with 120-fs, 85-m J/pulse,10-Hz laser system was investigated. Compared with the traditional gas target, static gas target is simple to be used in experiment, and the experimental parameters can be easily controlled. The effects on highorder harmonics due to laser intensities (energy), polarization, gas densities, confocal parameter, and phase mismatch were studied in this paper.     

激光二极管bar侧面泵浦Nd：YAG激光器热效应研究

从不同侧面泵浦方式的泵浦光强分布出发．依据热传导方程．求解出棒状激光晶体内的温度分布．计算出不同泵浦分布时的理论热透镜焦距．并进行热透镜实验。理论分析和实验表明，随着泵浦方向的增多，晶体内泵浦光强和温度分布越接近于轴向对称分布，热透镜更接近球面透镜。     

共焦激光扫描荧光显微镜的扫描系统研究

本文简述共焦激光扫描灾光显微镜的基本原理，提出扫描系统的方案确定和优化设计的方法，使用该方法何使扫描渐晕减少为原来的１％。同时还给了扫描控制系统运行和控制法以及是均匀图的补偿方法。     

Quasiparticle Band Structure of BaS

We calculate the band structure of BaS using the local density approximation and the GW approximation （ G WA ）, i.e. in combination of the Green function G and the screened Coulomb interaction W, The Ba 4d states are treated as valence states. We find that BaS is a direct band-gap semiconductor, The result shows that the GWA band gap （Eg-Gw = 3.921 eV） agrees excellently with the experimental result （Eg-EXPT = 3.88 eV or 3.9eV）.     

最小化延误工序的单机限期批处理问题(英文)

本文讨论了最小化延误工序的单机限期批处理问题，并对当所有工序同时处理时的特例给出了两个多项式算法．     

Laser Tracking and Pointing at a Target with Stimulated Brillouin Scattering

Laser tracking and pointing at a simulated moving target in atmosphere 1.27 km away is realized experimentally,in which stimulated Brillouin scattering (SBS) phase conjugation technology and velocity compensation mirror are used. Only if the angle between the SBS phase conjugation laser and the illumination laser is smaller than the atmosphere isoplanatic angle ψo, is the wave-front aberration of laser beam produced by atmospheric turbulence compensated for in real time. This experiment was carried out with horizontal ranges 1.27km at 50m height above the ground, and Nd: YA G lasers are used. By changing the angle of a velocity compensation mirror reflecting the SBS phase conjugation laser to the simulated target, simulated targets with different moving velocities are tracked and pointed by the laser beam. The spot and energy distribution of illumination laser spot and SBS phase conjugation laser are recorded. The energy back to target is up to 75 mJ. The SBS phase conjugation laser spot shows that it is focused at the simulated moving target within a small area.     

萃淋树脂富集、电热原子吸收光谱法测定水中超痕量镱

萃淋树脂(Levextrel)是一种新型的反相层析用固定相,它以苯乙烯-二乙烯基苯的共聚物为骨架,其中含有一种或数种选择性的萃取剂。萃淋树脂兼有离子交换剂的高效性和溶剂萃取剂的高选择性的优