用于大功率C0_2激光器的新型光学元件

由于激光器生产者对大功率的追求和新应用的开发,不断研制出了C0_2激光器的光学元件。激光材料加工应用日益广泛,这就要求使用革新的光学元件,以提高性能,或执行新功能。下面介绍透射和反射光学元件的一些新研究成果和典型应用。     

Speckle averaging by phase shift for digital shearography fringe

ＳｐｅｃｋｌｅａｖｅｒａｇｉｎｇｂｙｐｈａｓｅｓｈｉｆｔｆｏｒｄｉｇｉｔａｌｓｈｅａｒｏｇｒａｐｈｙｆｒｉｎｇｅＦ．Ｃｈｅｎ；Ｙ．Ｙ．Ｈｕｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆｍｅｃｈａｎｉｃａｌＥｎｇｉｎｅｅｒｉｎｇ，ＯａｋｌａｎｄＵｎｉｖｅｒｓｉｔｙ，Ｒ...     

CONTINUOUS DEPENDENCE ON THE TERMINAL CONDITION OF SOLUTIONS TO NONLINEAR REFLECTED BACKWARD STOCHASTIC DIFFERENTIAL EQUATIONS

In this paper,we derive the continuous dependence on the terminal condition of solutions to nonlinear reflected backward stochastic differential equations involving the subdifferential operator of a lower semi-continuous,proper and convex function under non-Lipschitz condition by means of the corollary of Bihari inequality.     

[N2]*2-N2分子二聚物的发射谱和受激辐射特性

理论上通过从头算法计算与理论分析证明存在D_2h群对称性的[N₂]₂即N₂分子二聚物，且存在电偶极允许的类准分子跃迁a¹B_2g→a¹B_3u. 理论计算获得的a¹B_2g→a¹B_3u跃迁的发射谱与实验观测到的结果很好地吻合. 利用微波激励高纯氮和放大自发辐射法研究了N₂分子二聚物的受激辐射特性，实验研究结果表明，当微波功率大于100 W，充入N2气压在260~2200 Pa范围内N₂分子二聚物在336.21 nm处存在受激辐射特性.     

Experiments with single atoms in cavities and traps

ＥｘｐｅｒｉｍｅｎｔｓｗｉｔｈｓｉｎｇｌｅａｔｏｍｓｉｎｃａｖｉｔｉｅｓａｎｄｔｒａｐｓＨ．Ｗａｌｔｈｅｒ（ＳｅｋｔｉｏｎＰｈｙｓｉｋｄｅｒＵｎｉｖｅｒｓｉｔａｔＭｕｎｃｈｅｎａｎｄＭａｘ－Ｐｌａｎｃｋ－ＩｎｓｔｉｔｕｔｆｕｒＱｕａｎｔｅｎｏｐｔｉｋ...     

Some Problems on Reconstruction of Soft X -ray Hologram with Visible Light

ＳｏｍｅＰｒｏｂｌｅｍｓｏｎＲｅｃｏｎｓｔｒｕｃｔｉｏｎｏｆＳｏｆｔＸ－ｒａｙＨｏｌｏｇｒａｍｗｉｔｈＶｉｓｉｂｌｅＬｉｇｈｔ￥ＣＨＥＮＪｉａｎｗｅｎ；ＸＵＺｈｉｚｈａｎ；ＺＨＵＰｅｉｐｉｎｇ；ＸＩＡＯＴｉｑｉａｏ；ＫＯＵＬｅｉｇａｎｇ；ＷＡＮＧＺｈ...     

Nuclear Level Density and Thermodynamic Functions for Nuclei with Static Deformation

The level densities of even-odd and even-even isotopes^161,162Dy,^166Er and ^171,172Yb were calculated using microscopic theory of interacting fermions and compared with experiments.It is found that the data can be well reproduced with level density formalism for nuclei with static deformation.The nuclear temperature as well as the reproduced with level density formalism for nuclei with static deformation.The nuclear temperature as well as the entropy of nuclear system as a function of excitation energy has been extracted from the BCS theory.It is shown that the entropy exhibits an S-formed shape as a function of excitation energy.This is interpreted as a phase transition.Procedure of treating the even-odd and even-even nuclear systems has been presented and discussed.     

大气重力波产生中纬电离层不均匀体的理论

研究中纬电高层Ｆ区大尺度不均匀休的基本性质及其与大气重力波的关系。分析了等离子体Ｐｅｒｋｉｎｓ不稳定性的非线性发展，发现这种不稳定性饱和在很小的幅度上。讨论了Ｐｅｒｋｉｎｓ不稳定性与重力波的耦合，表明重力波能触发中纬电离层Ｆ区等离子体不稳定性。由重力波触发的等离子体不稳定性可能演变成大幅度的波形结构，空间和时间调制的不均匀体理论揭示了大尺度中纬电离层不均匀体的产生机制。 关键词：     

Relativistic aspects of HMO

Ｒｅｌａｔｉｖｉｓｔｉｃ ａｓｐｅｃｔｓ ｏｆ ＨＭＯ￥ＷＡＮＧＧａｎｇ（ＰｈｙｓｉｃｓＤｅｐａｒｔｍｅｎｆ，ＵｎｉｙｅｒｓｉｔｙｏｆＥｌｅｃｆｒｏｎｉｃＳｃｉｅｎｃｅ　ａｎｄＴｅｃｈｎｏｌｏｇｙｏｆＣｈｉｎａ，Ｃｂｏｎｇｄｕ６１００５４，Ｃｈｉｎａ...