The parallel properties of the rays in a complete noncompact Riemannian manifoldM were discussed in this paper, It is proved that the Busemann functions corresponding to any given two parallel rays are just the same as each other in the sense of H.
讨论了具非负典率的完备非紧黎曼流形M上平行射线的性质,证明了此时两平行射线对应于M上的同一个Busemann函数。
The mean beam lengths of furnace gas to wall and to slab in reheating furnace are distinguished,then the simplified expressions to calculate them are given by the Gauss-Laguerre integration.
区别了加热炉内炉气对炉壁及其对钢坯的平均射线行程,给出计算炉气对炉壁及其对钢坯的平均射线行程的简化表达式,并应用Gauss-Laguerre积分公式计算上述平均射线行程。
An inversion method is presented to calculate the mean beam length from absorbing gas to part of its boundary.
提出任意几何形状吸收性气体对其部分边界平均射线行程的一种反演方法,采用3点Gauss-Legendre积分公式反演典型几何形状吸收性气体对其部分边界的平均射线行程,并应用文献中的数据对模型进行验证。
The Parallelism of the Rays in a Complete Riemannian Manifold with Nonnegative Curvature
非负曲率的完备黎曼流形上的平行射线
a group of nearly parallel lines of electromagnetic radiation.
一束几乎平行的电磁射线。
Visiblity for A Set of Segments Based on Parallel Light in the Plane;
平行光照射下平面内一组线段的可见性
Least squares polynomial smoothing was constantly used in X ray diffraction test.
X射线衍射线常用多项式拟合移动平滑方法进行处理。
Telecentric operation (field rays leave parallel to optical axis, unlike Barlow lenses which diverge rays).
远心手术（场射线离开平行光轴，不像巴卢镜片，其中发散射线）。
An Inversion Method of Mean Beam Length from Absorbing Gas to Part of Its Boundary
吸收性气体对其部分边界平均射线行程的反演
Performance of a soft x-ray splitter grating parallelism measuring system by diffraction method
衍射法X射线激光分束光栅平行度测量系统(英文)
cosecant squared beam
平方余割包线型射束
Sculpt with your fingers parallel to the curve of the head and90 degree projection, using the shorter length guide.
以你的手指平行达到头和90度发射的曲线雕刻,使用矮长度引导者。
Treatment with dehydrated alcohol and pinyangmycin under X-ray perspective in facial cavernous venous malformation
X线透视下行无水酒精平阳霉素注射治疗体表静脉畸形
An Approximate Approach of Missile Average Velocity Based on Air-to-Air Missile Launch Acceptability Region
一种基于空空导弹允许发射包线的导弹平均飞行速度的近似解算
An incident ray of light is reflected when meeting the surface of a plane mirror
入射光线遇平面镜会产生反射
reflective IR collimator
反射式红外平行光管
parallel oblique seismic reflection configuration
平行斜交地震反射结构
subparallel seismic reflection configuration
亚平行地震反射结构
coat thickness measuring instrument
涂层测厚仪（用放射性射线进行检测）
Another antenna which is conical horn with a metal plate lens radiates linear polarized wave.
本文同时对加平行板的圆锥喇叭进行了研究,其特点是辐射线极化波。
Singularities of Parallels for Hyperbolic Plane Curves
双曲平面曲线的平行曲线的奇点分类