X光底片在位相对标定

本文描述了X光底片在位相对标定技术。其原理是使X射线谱经阶梯形吸收滤片透射后,对X光底片曝光,测量底片的曝光量。文中给出了标定方法和数据处理方法,而且也给出了在X光激光实验中得到的Kodak AA5底片的特性曲线。     

在CPM非稳腔Nd:YAG激光器中用被—被动锁模方法选单脉冲的探讨

在CPM Nd:YAG非稳腔激光器中,我们使用透过率较大的可饱和吸收体使单脉冲序列中的脉冲个数减少到3—5个,在输出的单序列中再使用非线性介质进行处理,可以得到比较接近的单脉冲输出。     

用时间-边界跟踪模型确定抗蚀剂显影后的轮廓分布

文章提出了时间一边界跟踪模型的定义,阐述了用该模型确定抗蚀剂显影后的轮廓分布的方法,并给出了模拟计算结果.     

Density of states for one hole in a half filled infinite U two-dimensional Hubbard model

We investigate this problem by two methods. In the first one the density of states is determined from its moment expansion. In the second approach an imaginary time Green function obtained by a special world line Monte Carlo algorithm is analytically continued to the real frequency axis.     

钽酸锂晶体宽带滤波器

本文简要介绍钽酸锂晶体及器件的一些特性,对用该材料制作的21.4MHz宽带滤波器的设计、制作和测试结果作了较详细的介绍,滤波器的带宽达225kHz,矩形系数(BW_(?0dB)/BW_(3dB)为2.66,带外衰减在50dB以上。该材料在做宽带滤波器和压控振荡器方面具有优越性。     

一种奇特型阴极的分析研究与改进

本文主要叙述对Jc-300磁控管奇特型阴极的分析研究、改进过程及其投入生产使用的效果     

专用集成电路CAT技术的进展

本文简单地回顾了提高VLSI测试效率所采用的一些手段,讨论了在ASIC测试问题研究中出现的一些新观点、新方法、新动向,以及所取得的成果。在此基础上,文章阐明了ASIC测试技术的发展方向,并着重论述了可望在未来得到发展的,针对ASIC的功能测试方法。     

Large-scale magnetic structures of coronal mass ejections

Based on the studies on the source regions of a group of coronal mass ejections, we have identified two types of large-scale magnetic structures, and suggested that they are intrinsic components of solar magnetism, their destabilization, expansion, and eruption into the interplanetary space are the basic physical processes which lead to the coronal mass ejections. These two types of large-scale structures are giant magnetic loops connecting the two active belts on the opposite hemispheres of the Sun, and the giant filaments (filament channels) and their related magnetic structures. The latter often appear as two parallel rows of sunspots and plage fields, which align side by side in the full disk daily and synoptic magnetograms. The magnetic neutral lines of these large-scale structures are usually longer than 50 heliographic degrees. We name this type of structure “super A configuration”. Sometimes, they are shown as very long filaments and related large-scale magnetic fields. As these magnetic structures are of very large scale, they extend to a great altitude into the corona, they are not easily recognized in magnetic field observations which are usually aimed at solar flare studies. To identify these large-scale structures becomes a key to understanding and predicting coronal mass ejections.     

一种新的奇偶非线性相干态及其量子统计性质

定义了一种新的奇偶非线性相干态即算符B2[B=af(N)]的两个正交归一本征态,利用数值计算方法研究了它们的量子统计性质.结果表明,与通常的奇偶相干态不同,在参数|β|变化的某些范围内,只有偶非线性相干态可以存在压缩效应,而振幅平方压缩和反聚束效应在这两个态中均可以呈现 关键词： 新的奇偶非线性相干态 压缩 振幅平方压缩 反聚束效应     

ILLLI对银屑病患者红细胞SOD和MDA变化的影响

目的:探索ILLLI治疗对银屑病患者红细胞SOD、MDA变化的影响。方法:以氦氖激光或半导体激光ILLLI,每次照射时间 1h,功率 5mW,每天 1次,10次为一疗程,观察治疗前后银屑病患者外周血红细胞SOD、MDA变化,并与正常人的结果作对比。结果:银屑病各组红细胞SOD含量在治疗前无显著差异,均低于正常对照组,正常对照组SOD平均高出患者2.6倍,统计学分析差异有显著性,p<0.05,治疗后,各组SOD含量均有明显上升,平均上升近2倍之多,p<0.05,且接近正常对照组,p>0.05。银屑病各组红细胞MDA含量在治疗前无明显差别,均高于正常对照组,平均高出正常人近2.4倍,差异有显著性,p<0.05,治疗后,各组MDA含量均有明显下降,平均下降近1倍,有统计学差异,p<0.05,但未恢复到正常人水平,与正常对照组之间仍存在显著性差异,p<0.05。结论:ILLLI治疗无论是He-Ne激光或是半导体激光对银屑病病员都能激活SOD,提高患者的抗氧化能力。