1)  focal plane
焦点平面
1.
It it easy to findthe focal plane where the germ exists because of the colorant.
由于染料具有颜色,较易找到细菌所在的焦点平面,且染料把背景涂上淡淡的颜色,观察细菌运动现象更加明显可靠,在教学中收到了较好效果。
2)  focus
焦点
1.
Homogeneous Second System of Center-focus Type to System Concluding Parameters;
中心-焦点型齐二次系统参数化简问题
2.
Designed principle of the rotational stand uses for measuring a camber with double focuses;
一种双焦点曲面的测量用转动架的设计原理
3.
A kind of directness arithmetic about conic′s focus;
二次曲线焦点的直接求法
3)  focal point
焦点
1.
The focal points of their arguments such as advance informed agreement (AIA), risk assessment and risk management, information exchange and other related issues have been expounded and analyzed.
生物技术的安全性(生物安全)问题已经引起了国际社会的严重关注,不同国家的生物安全能力的巨大差异,使他们对国际生物安全立法的内容和形式等问题产生了很大的分歧,争论的焦点集中在提前知情同意、风险评估和风险管理、资料交换等问题上;本文就上述问题进行了阐述和分析,并指出了国际生物安全立法的发展趋
2.
Based on the Lyapunov stability theory,through improving related theorem,obtain simple and effective methods of judging center or the focal point of nonlinear system and estimating the attraction territory of non-autonomous system.
从Lyapunov稳定性理论出发,通过将有关定理改进,得到判断非线性系统的中心或焦点及估计非自治系统的吸引域的简便而有效的方法。
3.
By the definitions of the conjugate point and the focal point in a geodesic,the paper proves that for any geodesic γ:[0,+∞)→M,in a complete Gauss surface M with positive curvature,there exists t>0 such that γ(t) is a focal point of γ(0).
从测地线的共轭点、焦点的定义出发,证明了对任意具正曲率的完备二维Gauss曲面,γ:[0,+∞)→M为测地线,则存在t>0,γ(t)是γ(0)之焦点。
4)  twin-focus technique
双焦点
1.
Study on the twin-focus technique in laser welding;
激光焊接中的双焦点技术
5)  laser focus position
激光焦点
1.
The most popular detection methods both at home and aboard are introduced,and a method on the position control system for beam focus is presented during laser beam cutting process based on CCD,which can accurate detect and control the laser focus position during laser beam cutting process by using the laser triangulation and CCD imaging system coordination digital image proce.
激光焦点位置的检测与控制是激光切割系统中的关键技术之一。
6)  static focal spot
静态焦点
1.
According to the interaction and degree of interaction between electron beam and metal, the EB focal spot is classified to the static focal spot, the quasi-dynamic focal spot and the dynamic foca.
回顾了焦点定义和测量方法 ,首次明确将电子束流焦点状态与焊接过程建立直接联系 ,揭示了具有焊接特征焦点与测量方法的内在关系 ,并根据束流与金属是否产生作用和作用的程度 ,将焦点分类成静态焦点、准动态焦点和动态焦点。
参考词条
补充资料:X线管的焦点


X线管的焦点


放射学术语。X线管内X线的发源点,即X线管阳极,接受电子撞击并产生X线的部位。X线管阳极的焦点并非为一个无限小的点,而是具有一定几何学的面积,故又称焦点面。由于X线管阳极靶面实际接受电子撞击的面积与其参与X线几何投影的有效面积不同,故焦点有实际焦点
说明:补充资料仅用于学习参考,请勿用于其它任何用途。