Microlaser with Ramsey Separated Fields Cavity

In a novel microlaser configuration with Ramsey separated-field cavity, we investigate a two-level atomic beam interacting with a single-mode high-Q Ramsey cavity, which is composed by two separated resonators. By using the well-known Ramsey cavity, one can recover the characters of microlaser even with a high flux atomic beam.     

Evaluation of Influence of Multiple Scattering Effect in Light-Scattering-Based Applications

The extinction cross sections of a system containing two particles are calculated by the T-matrix method, and the results are compared with those of two single particles with single-scattering approximation. The necessity of the correction of the refractive indices of water and polystyrene for different incident wavelengths is particularly addressed in the calculation. By this means, the volume fractions allowed for certain accuracy requirements of single-scattering approximation in the light scattering experiment can be evaluated. The volume fractions calculated with corrected refractive indices are compared with those obtained with fixed refractive indices which have been rather commonly used, showing that fixed refractive indices may cause significant error in evaluating multiple scattering effect. The results also give a simple criterion for selecting the incident wavelength and particle size to avoid the ＇blind zone＇ in the turbidity measurement, where the turbidity change is insensitive to aggregation of two particles.     

非高斯型互相关随机数的发生技术

在用蒙特卡罗法进行仿真研究（例如进行测量不确定度评定）时,常常需要发生多个非高斯型互相关的随机数.就这一问题,给出完整的解决方案：用Hermite展开式生成近似的非高斯变量,借助Cholesky分解建立各变量之间的相关性.方法的关键在于对互相关系数矩阵进行“预变形”,使Cholesky分解也适用于非高斯变量.此外,还利用Cholesky分解式下三角矩阵的特点,对矩调整和建立相关性两个过程进行解耦.给出了详细的算法说明.     

干涉仪测向解模糊方法

介绍了干涉仪测向基本原理,针对干涉仪测向模糊问题给出了长短基线法、参差基线法、虚拟基线法、无模糊长基线干涉仪测角法、立体基线法5种解模糊的方法,并分析总结了各种解模糊方法的特点以及适用条件.     

基于MATLAB图形用户界面的信号分选仿真系统

仿真系统采用MATLAB图形用户界面（GUI）设计实现，参数设置灵活，界面友好，并且能够模拟硬件方案中脉宽（PW）和到达时间（TOA）的测量和提取方式，使系统能更有效地用于研究雷达脉冲分选的过程和验证各种常用算法的可行性．通过比较各算法的性能，挑选出最优方案，指导硬件系统设计，达到节约成本的效果．实践证明，该系统能很好地应用于雷达脉冲信号的分选研究．     

初中英语高效课堂浅探

高效课堂可以让学生获取更多的知识,培养丰富的情感,养成良好的习惯,锻炼各方面的能力,满足终身发展的需要.抓住学生的需求和兴趣所在,是取得高效的关键.要想让课堂效益最大化,关键在于使学生愿意学、会学、乐学.     

高校企业如何建立现代企业制度的若干思考

现代企业制度是适应社会化大生产和市场经济发展要求的经济制度。但要将此制度引入高校，并在高校企业中建立，却并非易事。本从提高对高校企业建立现代企业制度的认识、摸索校办企业建立现代企业制度的经验，掌握建立现代企业制度的运作技巧三方面对高校如何建立现代企业制度提出了自己的看法。     

GPS-RTK在矿山测量中的应用

三鑫公司利用GPS-RTK，成功完成了尾矿库征地、大坝增高、坝体沉降观测、土方量计算、鸡笼山控制测量、寻找老钻孔、井下采空区注浆封堵、地表物探、动态更新地形图等各项紧急而复杂的测量任务，极大地提高测量工作效率和成果的可靠性。