极线

In a single bar magnet as shown to the right, they attempt to form closed loops from pole to pole.They never cross one another.They all have the same strength.

磁场线总是寻求阻力最小的路径从一极到另外一极，但是不能相交。，所以在空间的分布是一个逐渐扩大的圈子。

Goldschmidt s gnomonic projection,a method of comparison with line and face about the identified visibility of the crystal face on gnomonic plane is given to search hidden line of mineral crystal shape.

根据图形消隐的基本原理，针对心射极平投影的特点，使用线、面比较法在极平投影面上判断晶面的可见性，进而消除矿物晶体形态图中的隐藏线。

An earthquake of MS6.1 occurred 67 km north to Alertai in Xinjiang Uygur Autonomous Region（N 48°24＇,E 88°14′）on Mar. 13, 1996. The meizoseismal area was located in the Alertai Mountain range near the border between China and Mongolia. The major axis of isoseismal lines in the meizoseismal area was in NW direction.

1996年3月13日新疆维吾尔自治区阿勒泰市北约67km处发生MS6.1级地震（48°24′N，88°14′E），极震区位于阿尔泰山脉山脊中蒙边境附近，极震区等震线长轴方向为北西。

Because RFCA in a bipoiar fashion can enlarge lesion surface area without increasing the depth, and its particular lesion distributions involved the electrode/tissue interface and the part between the two adjacent electrodes, there is much opportunity to hit the target in bipolar fashion so long as the orientation of the pathway or the any part of reentant circle is not parallel to the electrode-connecting line, whatever at any angle.

因为双极消融法比常规单极消融法有更大的消融面积但不增加深度，而且其组织损伤分布于两电极与组织的交界面和两电极之间区域，所以只要旁道或折返环路的任何部位的走向与两电极的连线不相平行，在任何夹角下双极消融均比单极消融有更多的击中机会。

And the polar angle and the polar radius was represented into AutoCAD polar coordinate, the involute was drawn through the spline linear tool. And then, a section of the involute was intercepted with the diameters of the point circle and the root circle, used it as the tooth face of the spline. The involute tooth thickness was drawn using the diameter of the divided circle and the tooth-form was drawn through rotating, mirroring image and cutting.

根据DIN 3960渐开线花键的坐标值，用EXCEL函数功能计算出不同压力角下渐开线的极角和极半径，表示成AutoCAD极坐标并通过样条线工具绘制出渐开线，再用齿顶圆和齿根圆直径截取一段渐开线作为为花键齿面，并用分度圆直径绘制出渐开线齿剖面，经镜像和裁剪便可绘制出渐开线齿形。

In this paper, assuming that pulsar magnetic field is rotating vacuum dipole, which is derived from retarded potential, the PA curve is reinvestigated.

文章采用从推迟势导出的旋转真空磁偶极场，研究了在脉冲星磁场为旋转磁偶极场位形下的线偏振位置角曲线。

MF-PEDA exhibits excellent broadband behaviors covering the frequency range from 3.1 to 10.6GHz, good fidelities of signal waveforms in space, and radiation patterns similar to those of a conventional dipole antenna.

提出的宽带扇形-槽线耦合结构，可有效克服这类偶极天线在带宽和馈电方面的局限，从而让平面椭圆偶极天线能有效应用于工程实现。

An arbitrary shaped line current on a horizontal plane is divided into many small line segments and approximated by Hertzian diploes, then both the near and far EM-field of the line curennt is approximated by the summation of the complete near and far fields of Hertz dipoles.

水平面上任意形状线电流分割为许多小段之电流，每一小段之电流近似为赫芝偶极，则在三度空间任意座标平面上无论远近之电磁场即可以赫芝偶极之远近完整电磁场加总合成近似之。

Since the septum bag, comprised by the pole-piece complex provided by the present invention, is packed by the package line that is winded at least two circles surrounding the pole piece, the package of the septum bag is firm, thereby can effectively prevent the septum bag from fracturing, so as to prevent the short-circuit caused by the contact of the anode pole piece and the cathode pole piece, thus effectively improving the mechanical-impact-resistant performance of the battery.

由于本发明提供的极片复合体所包括的隔膜袋由至少两圈围绕极片四周的封装线封装而成，所以隔膜袋封装牢固，可以有效地避免隔膜袋的破裂，从而避免了正、负极片的接触所造成的电池的短路，有效地提高了电池的抗机械冲击性能。

The method is deployed to process the crossed dipole data, thus to identify the types of anisotropies from the dispersion characters of fast and slow flexural waves, those types include:①the coincidence of dispersion curves of anisotropic formation;②the parallel of dispersi...

用该方法处理了某井正交偶极资料，从快、慢弯曲波的频散特性中识别出各向异性的类型：①各向同性地层频散曲线重合；②固有的各向异性地层频散曲线平行；③应力引起的各向异性地层频散曲线交叉。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了