论文部分内容阅读
测量气流速度的新方法——激光谱线测量
【机 构】
:
中国科学院力学研究所
【出 处】
:
中国激光
【发表日期】
:
1986年13期
其他文献
准分子激光器的出现,使得在真空紫外光谱区能产生十分之一瓦的功率(每脉冲十分之一焦耳能量),这样,激光光学元件的材料选择就成为一个重要问题。对于不同的波长、功率和脉冲速率,各种材料都呈现出一些在精确的实验中不希望有的,或者限制工作寿命的效应。
期刊
In this paper, a novel energy functional minimization model is proposed for ultrasound images denoising. A controllable regularized term and the variational method are employed in the process of speckle noise. This model not only improves the plasticity o
期刊
Enhanced magneto-optical Kerr effect and index sensitivity in Au/FexCo1-x magnetoplasmonic transduce
Magnetoplasmonic sensors are attractive candidates for ultrasensitive chemical and biomedical sensor applications. A variety of ferromagnetic metal thin films have been used for magnetoplasmonic device applications, yet the dependence of sensor performanc
The prickly pear fruit helps in combating viral based infections. It is used to treat diabetes and declared to possess hypoglycemic effects. There is also record of the usage of the fruit in the olden days as a remedy for diabetes, lipid disorders, inflam
提出一种采用少模阶跃光纤与单模光纤连接的方法, 实现低弯曲损耗传输的新型光纤通信系统。采用有限元法研究了在模场直径相同的情况下少模光纤纤芯半径与折射率差的关系, 以及不同参数下光纤的弯曲损耗; 采用光束传播法计算了少模光纤的各种模式与普通单模光纤的基模的连接损耗。证明了采用少模光纤可以利用模式间的正交性实现有效的单模传输, 并具有低的弯曲损耗和连接损耗。
Sub-lines are one-dimensional diffraction patterns representing the light beams emerging from horizontal planes of an object image. Past research has demonstrated that the sub-lines can be encapsulated as a multi-bank filtering process, and implemented wi
In this work we present experiments by focusing 42 femtosecond laser pulses in air using three different focal length lenses: f=100, 30 and 5 cm. For the longest focal length, only the filament, which is a weak plasma column, is observed. When the shorter
通过固相反应法合成了一种新型硼酸盐荧光粉K6Ba4B8O19∶x %Eu
3 ,并测得其荧光量子效率。结果表明,实验合成了接近纯相的K6Ba4B8O19基质;当合成温度为750 ℃时,K6Ba4B8