圆地

The circular polarization at the lower resonant frequency of the dual-frequency antenna can be achieved by setting a perturbation segment at an appropriate location in the patch element, and placing the feed point on the diagonal axis.

在较低的谐振频率处圆极化的获得是通过在天线辐射单元上适当地设置摄动元素，并将馈电点移到辐射单元的对角线上。

This thesis is devoted to the study of composition operators on some spaces of analytic functions defined on the unit disk D in the complex plane. They involve Hardy space, weighted Bergman spaces, Dirichlet space, Nevanlinna-type classes, etc.

本文系统地研究了定义在复平面C中的单位圆盘D上的几类解析函数空间上的复合算子，涉及的空间包括Hardy空间、加权Bergman空间、Dirichlet空间、Nevanlinna类等等。

If a drop of blood be drawn by pricking one's finger, and viewed with proper precautions, and under a sufficiently high microscopic power, there will be seen, among the innumerable multitude of little circular, discoidal bodies, or corpuscles, which float in it and give it its color, a comparatively small number of colorless corpuscles, of somewhat larger size and very irregular shape.

如果刺一下手指，取出一滴血来，并相当小心地将之放在一个倍数足够大的显微镜下观察，你就可以在无数漂浮在血液中并使血液呈现红色的圆盘状小球之间，发现数量较少、体积较大、形状很不规则的无色球状微粒。

The algorithm can detect the eyelash effectively and can improve the classification and discriminability of iris patterns and the rate of iris recognition.

实验结果表明，该方法可以有效地检测眼睫毛，并且所得到的扇形区域包含外圆内部所有的眼睫毛像素，可以有效提高模式的可分性和虹膜的识别率。

Functions are provided to support input in latitude and longitude, to support output of latitude and longitude, to calculate the great circle distance between two points and to easily specify a bounding box usable for index searches.

提供了几个支持以经纬度输入的函数、支持输出经纬度的函数，以及计算大圆上两点距离的函数以及可以比较简单地声明一个外包框用于索引搜索的函数。

A method of determination of the base circle and offset distance was presented and a designer can ascertain the principal size parameters of disk cams correctly or take them as the original numerical values for design.

主要分析了偏置式推杆盘形凸轮机构的主要尺度参数与所给定运动参数之间的关系，并提出了基圆半径r0 ，偏距e等的取值原则与方法，从而准确无误地确定凸轮的主要参数，或是把此参数作为设计变量的初值。

Such as day to work for many years, using the pen and ink drawing duplicate the same round, gray tone, some boring, and even hoped to see the beautiful scenery along the way, I heard melodious voices.

多年如一日地工作，用重复的笔墨描画着相同的圆，灰色的调子有些沉闷，更希望沿途看到亮丽的风景，听到悠扬的声音。

It is wonderful with what elaborateness this simple fact is advertised ——this piscine murder will out —— and from my distant perch I distinguish the circling undulations when they are half a dozen rods in diameter.

真是神奇，这简简单单的一件事，却可以这么精巧地显现，——这水族界的谋杀案会暴露出来——我站在远远的高处，看到了那水的扩大的圆涡，它们的直径有五六杆长。

With the theory, any straight lines and quadratic curve′s equidistance curve can be indirectly interpolated with the help of outline and wire circle′s information, it is unnecessary to calculate equidistance curve .

该理论直接利用轮廓曲线和丝圆的信息，不需计算等距曲线，间接实现任意直线和二次曲线的等距曲线的插补，有效地避免了传统计算等距曲线产生的计算误差，简化了数控机床控制程序设计，提高了机床的控制精度。

Design of irregular template based on the concentric equipotential line of target contour,combined with the projection,can quicly and efficiently realize automatic identification and position of irregular images by the computer.

针对工业自动装配产品过程中异形工件出现旋转后的定位问题，提出一种新的异形目标识别方法，设计基于目标轮廓的同心等势线异形模板，并结合圆投影方法，能快速有效地实现计算机对异形目标的自动识别与定位。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。