1) 4F catheter
4F导管
1.
Diagnostic coronary angiography by femoral artery approach with 4F catheter in 115 cases;
使用4F导管经股动脉径路行冠脉造影115例体会
2) 4f orbital
4f轨道
1.
Structure feature of RE and effect of its 4f orbital in bonding process were discussed,and hybridization mode including 4f orbital component was depicted,finally calculation procedure about bonding capacity of the hybridization orbital was afforded.
论述了稀土元素及其结构特点,讨论了4f轨道在成键中的作用,描述了4f轨道参与形成杂化轨道的杂化方式,给出了杂化轨道的成键能力计算方法。
3) 4f system
4f系统
1.
Optical logic coding based on 4F system;
基于4F系统光学逻辑编码的实验
2.
Wavelet threshold denoise method for 4f system based on SAR statistic parameters
基于SAR统计参数的4f系统小波阈值去噪方法
3.
Off-axis Fresnel holograms recorded with a magnified image, which is obtained by using a 4f system, are numerically reconstructed.
通过记录经4f系统放大的物体实像的离轴菲涅尔数字全息图,由数字再现技术获得物体的放大像,由此计算出物体相位反差像,从而得到物体的微现形貌。
4) f electron
4f电子
1.
Based on the principle of symmetry operation, the formulae of crystal field potential of 4f electron with different symmetry are presented.
研究了不同对称环境下,对称操作对4f电子晶场势的限制规律,得到了表示4f电子晶场势的快捷方法,为稀土化合物晶场参数的确定提供了方便。
5) 4f optical system
4f系统
1.
Using the optical correlation recognition technique,an image s correlation recognition system based on 4f optical system is suggested,which is a real-time infrared image processing system.
利用光学方法的半色调网屏技术实现了红外图像的假彩色编码,提高了红外图像的可识别性;利用光学相关识别技术构造了一种基于4f系统的光学图像实时相关识别系统,以实现对红外图像的实时处理和识别。
6) 4f system
4f 系统
1.
Introduce the principle of third-order nonlinear refractive index measurements using this system:nonlinear sample is fixed at the Fourier plane of the setup,a single laser shot is emitted into the 4f system,and the spatial distribution of the intensity in the output plane of 4f system is recorded by a CCD camera, then we can induce the third-order nonlinear refractive index by num.
概述了4f 系统相干成像法提出和发展的过程,介绍了用这种方法测量三阶非线性折射率的基本原理:非线性样品被放置在4f 系统的频谱面上,利用单脉冲激光入射4f 系统,并用 CCD 记录下出射面上光场的空间分布情况,然后通过数值计算的方法得到样品的三阶非线性折射率。
补充资料：导管
李正理提供
[图]
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条