地线

Inside is something like this, red/brown one is Live line, blue one is Neutral/Null line and green one is earth line.

里面大概是这样，红/褐色的是火线，蓝色是中线而青色是地线。

The all-purpose safety plug has the advantages that when the contact of the earth wire is not conducted, the live wire and the null line can not be connected, in order to cut the power supply, therefore, the use safety is guaranteed.

优点：在地线触点未导通时，相、零线不能合上而切断供电，保障使用安全。

Is L1,L2,L3,N,PE.open the control-box the confirm,in control-box, connected the yellow green line is the grounding PE .3 black lines togother is null line N,for the machine must connect the Nnull line

接电源的工业插头按插头上标号接上对应电线，即L1，L2，L3，N，PE。打开控制箱门确认，控制箱内连接黄绿线的是地线PE，3根并在一起的黑线是零线N。本机必须连接N线。

The simplest way is to don't use them at all. In that situation, only the data lines and signal ground are cross connected in the null modem communication cable.

最简单的方法是根本不使用它们，在无猫通讯电缆中只有数据线和地线连接。

A centroid adjustment method is presented which can maintain the horizontal pose robot body when one arm is hung on the overhead ground lines. The balance weight is moved by the servo motor according to the angle of inclination between the inspection robot body and the horizontal plane, which can be checked by the obliquitous sensor, so that the centroid position of inspection robot is concentrated on the arm that is hung on the overhead ground lines. Because the body of inspection robot is kept in horizontal pose, the other arm can accomplish corresponding task for attaching to or detaching from the overhead ground lines.

本文提出了一种质心调节方法，利用倾角传感器测量机器人车体与水平面之间的倾角，从而控制配重块移动电机的运动，将机器人的质心调节到悬挂于架空地线上的那只手臂上，因此能保证机器人车体保持水平姿态，确保需要脱线或上线的手臂完成相应的动作。

Electric leakage protection plug to keep away injuries and damage resulted from electric leakage and charged earth wire – be much safer.

配置防电闸全能漏电保护插头，防范漏电和地线带电等异常情况，更加安全。

This paper presents a geodesic-based constrained deformation method for polygonal mesh models.

提出了一种基于测地线的多边形网格模型的约束变形方法。

Then, based on the mean curvature, Gaussian curvature and the function of principal curvature, the minimal loci of the principal normal surfaces of curves, the curves with constant Gaussian curvature and the two curves of which the ratio of their functions is constant can all be obtained, as well as the properties of geodesic curve and lumbar curve.

再根据平均曲率、高斯曲率及主曲率函数，能得到曲线的主法线曲面的极小轨迹、常高斯曲率曲线及两个主曲率函数之比为常数的曲线。还给出曲面上测地线和腰曲线的性质。

Secondly,for nonlinear vibratory systems,the relationship between a class of stationary geodesics of the Riemannian manifold and the nonlinear normal modes is found.

进而，将类似的对应关系推广应用到非线性振动系统中，得到了非线性模态与 Riemann 流形上的极值测地线之间的对应关系。

Newton's method; Riemannian manifold; Smale's point estimate theory; section of a vector bundle; geodesic; Lie group; one-parameter subgroup

基础科学，数学，几何、拓扑Newton法； Riemann流形； Smale点估计理论；向量丛的截面；测地线；李群；单参数子群

I bought a nice wrist watch as a surprise for my wife's birthday.

我买了一个漂亮的手表想要给我妻子的生日一个惊喜。

We don t expect students to be sponges. You can t expect to absorb everything and not have any questions to ask.

我们并不期待我们的学生是一块海绵，你没可能接收所有的东西而不提出任何问题。