normal line

The center of curvature can be defined as a limit point of intersection points of two normal line about the curve.

曲率中心又可以作为曲线上邻近的两个点所作法线的交点的极限。

The angle drawn at the point of incidence ( intersection of) a reflected ray and the normal line perpendicular to the reflecting surface.

中义光线在物体表面的投射点上反射出来的光线与物体表面垂直法线所夹的角度。

The angles between the normal line direction and the flow direction shows strong effect to the drag forces in the study, this dissertation puts forward a formula about interference factor of the angles.

论文研究还表明，当块体的法线方向与水流流向之间存在一定夹角时，得出水平拖曳力受夹角影响的拖曳力函数表达式。

· Theoretical analysis shows that there is a limitation for the array gain loss in an ocean multipath environment that exists more than 1 effective normal modes, which is an advantage for the application of a large-aperture line array.

理论分析表明，浅海多途环境中，当简正波号数大于1号时，阵增益下降存在极限，这对长线阵的应用是有利的。

Technological Remoulding to Improve Diesel Yield by Using No.4 Normal Line as Back Flow of the Vacuum Tower

常四线油作为减压塔回流增产柴油技术改造

The preceding example is intended as a replacement for the normal line in/ etc/ crontab that runs the daily Cron job.

前例的目的是替换运行日常Cron作业的/etc/crontab中的普通代码行。

Application of Normal Line in Technique of Drawing Geometry

法线在画法几何学中的应用

The error can be avoided by increasing the gear grinding allowance in length of common normal line to grind gear.

此误差可通过在公法线长度方向上加大留磨量，进行磨齿予以消除。

A rush-repair is being done on the line and the power supply will return to normal in half an hour.

线路正在抢修，半小时后恢复供电。

Initiation condition of sediment movement and determination of the width of normal line of navigation channel for pebble shoals

泥沙起动条件与卵石浅滩航道整治线宽度的确定

When a low-orbit satellite moves under thermal condition, the normal line of the antenna mirror surface turns due to antenna mirror thermal distortion.

低轨卫星在轨运行热环境条件下，不能有效释放热应力的反射镜面将产生热变形，镜面法向偏转可达百μrad量级；

Edge Detection Based on Minimum and Maximum of Luminance on Normal Line of Image's Edge

基于轮廓法线上亮度的极小、极大值边缘检测

Discussing on tangent plane and normal line on the curved surface

曲面∑上切平面与法线的研讨

In practice, the line Investment will be converted to a normal line mode power supply unit load investment, so that comparative analysis of economic indicators became more reasonable.

在实际应用计算中，将线路投资折算到正常供电方式下单位负载投资，使经济性指标分析对比更加科学。

A convenient system is designed to calculate the tooth profile error. This system includes the calculation of the inner gear length bar size, the common normal line, the chordal thickness and so on.

设计出便于工人进行齿形误差计算的交互式系统，主要涵盖量柱距、公法线和弦齿厚等常用检测项。

According to the demand for underwater camera modeling and calibration technology of underwater vision measurement, a model of underwater camera is established and a method of underwater camera calibration is presented. First, normal line structured-light measurement method is thoroughly discussed.

本文针对水下视觉测量技术对水下摄像机的建模与标定的需求，建立了一种水下摄像机模型，并提出了水下摄像机的标定方法。

The hazard warning line may replace the normal lane line near a hazard.

在接近危险的地方，可能有危险警告代替正常的行车界。

Study of Solving Normal Line and Tangent Plane of Archimedes Helicoid Based on MATLAB

基于MATLAB的阿基米德螺旋面法线和切平面的求解研究

Calculation of optimum teeth across number K for length of normal line

公法线长度最佳跨越齿数K的计算

Calculating the Common Normal Line ′ s Distance of Arc Gear Based on Newton Method

基于牛顿迭代法计算圆弧齿轮传动公法线长度

Method for Determining the Width of Normal Line and the Regulated Stage of the Northern Main Reaches of the Yellow River

黄河北干流航道整治线宽度及整治水位的确定方法

Appropriate to increase to allow the norms temperature of the wire existing provisions, you can increase the carrying capacity of the system stability, thereby enhancing the transmission capacity of the normal line.

适当提高现行规范规定的导线允许温度，可以增大系统稳定载流量，从而提高线路正常输送能力。

The real-time control of UPS was realized with 8052 SCM in the intellectualized on-line UPS, the double-direction transmission of data and signal between UPS and upper PC was implemented with correlative circuits, and the normal power supply output of UPS was guaranteed.

智能化在线互动式UPS，采用8052单片机实现对UPS的实时控制，通过通讯和相关线路完成现场UPS和上位机的数据和信号的双向传输，可始终保证UPS的标准电源输出。

Study of the algorithm to adjust external normal line on shading-surfaces

光照曲面的外法线调整算法研究

Characteristic of normal line of compact connected surfaces

紧致连通曲面的法线特征

The PIXE beam line of 2 × 1.7 MV tandem accelerator in Beijing Normal University have being employed for aerosol analysis since it established.

北京师范大学2×1.7MV串列加速器的PIXE管道自建立以来，主要应用于气溶胶分析。

A Simple Method for Designing Tooth Profile of Generating Hob-The Space Engaged Tooth Profile Normal Line Method

展成滚刀齿形设计的简易方法&空间啮合齿廓法线法

Research of Calculating Method for Surface Normal Line of 3D-Entity Model

一种三维实体模型表面法线计算方法研究

The mathematical equations of theoretical contour of cam and its tangent line and normal line were derived.

推导出了凸轮理论廓线及其切线与法线的数学方程；

Based on the principle that the fault line's phase of transient capacity current are different from normal line's, the fault-line will be found out by contrasting polarity of each line's wavelet packet decomposition coefficient in all characteristic bands.

然后根据故障线路暂态电容电流的极性与非故障线路不同的原理，通过比较各线路暂态零序电流在所确定的频段下的小波包分解结果的极性来实现故障选线。