Self Maps and Margolis Killing Constructionin the Category of Spectra

ＳｅｌｆＭａｐｓａｎｄＭａｒｇｏｌｉｓＫｉｌｌｉｎｇＣｏｎｓｔｒｕｃｔｉｏｎｉｎｔｈｅ　Ｃａｔｅｇｏｒｙ　ｏｆ　ＳｐｅｃｔｒａＬｉｎＪｉｎｋｕｎ（林金坤）ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓ，ＮａｎｋａｉＵｎｉｖｅｒｓｉｔｙ，Ｔｉａｎｊｉｎ...     

高能飞秒激光系统中空间滤波器的研究和设计

 由于透镜传输时间延迟效应（PTD），飞秒激光脉冲经过空间滤波器产生脉冲波前变形。讨论了用双胶合透镜或双分离透镜代替空间滤波器中的单透镜，以消除或减小PTD效应，设计了适用于飞秒激光装置的空间滤波器。     

非自共轭和不定椭圆问题的有限体积元方法的一致收敛性

In this paper, we prove the existence, uniqueness and uniform convergence of the solution of finite volume element method based on the P1 conforming element for non-selfadjoint and indefinite elliptic problems under minimal elliptic regularity assumption.     

45°斜孔反射镜的简易加工

介绍４５°斜孔反射镜粗磨成形的简易加工方法以及所需的设备和工装。     

超细碳酸钙的制备与表征

本文探讨了乳液法制备油溶性超细碳酸钙的最佳实验条件，并对获得的超细碳酸钙进行了表征.实验结果表明:超细碳酸钙形状呈球形，粒度均匀，粒径分布在。. O1 ^-0. 03}m之间，在许多有机溶剂中具有良好的分散性.     

云纹的矩阵分析

本文定义了三类光栅的光线变换矩阵，并用所给矩阵分析了云纹.所得结果和文献所给出的结果一致.     

Compensation for Self-Focusing of Picosecond Pulses in Nd：Glass by Using Cascaded Quadratic Nonlinearity

One of the obstacles in obtaining high power/energy laser sources is self-focusing, which stems from the nonlinear phase shift (B-integral) accumulated during beam propagation in Kerr media. Phase-mismatched secondharmonic generation may impose a nonlinear phase shift on the fundamental with controllable sign and magnitude,which can be used to compensate for self-focusing with a single-pass configuration. We have demonstrated such a possibility for picosecond pulses theoretically and experimentally, and both configurations of pre- and postcompensation by a β-barium borate crystal have been studied in detail. Cascaded second-order nonlinearity-based compensation for self-focusing may provide an auxiliary means to the conventional B-integral control techniques.