查询词典 polar circle

Thus, evaluation of the minimum zone circle could be solved effectively.Three methods of assessment of roundness error were proposed in this dissertation. Based on the criteria of the minimum zone circle, minimum circumscribed circle and maximum inscribed circle and convex hull, a unified approach was proposed to evaluate roundness error of the minimum zone circle, minimum circumscribed circle and maximum inscribed circle. Evaluation of the minimum zone circle, minimum circumscribed circle and maximum inscribed circle was fulfilled with rotation based the contact pattern. The minimum circumscribed circle and maximum inscribed circle were evaluated with curvature and the curvature circle.

本文提出了三种圆度误差评定的方法：根据最小区域圆、最小外接圆、最大内接圆在极坐标系下的判别准则，利用计算几何中的凸壳理论，提出了一种统一的评定方法，实现了对最小区域圆、最小外接圆、最大内接圆的误差评定；基于接触斑点的检验原理，利用旋转法，实现了最小区域圆、最小外接圆和最大内接圆的误差评定；利用曲率和曲率圆，实现了对最小外接圆和最大内接圆的误差评定。

First, this article introduced 2 grade of rotary kiln principle of work and the equipment, to rolled the circle mechanics behavior to carry on the analysis, proposed - rolled the circle - under roller's rotary kiln overall modelling based on the tube body - kiln liner - big tooth ring, to rolled the circle - under roller's contact stress to carry on the finite element analysis the method, and obtained rolled the circle contact stress the size and the distribution rule, finally indicated that rolled the circle contact stress mainly to have two main peak values and the sudden change in one week, appeared is rolling the circle and the under roller contact area; Then, rolls the circle the stress to regard as is the principal stress unknown plane stress test, the use quite mature modern test technology, proposed rolls the circle stress test the principle and the plan, and to rolled the circle the stress to carry on the scene test, the stress which the scene test analysis result and the finite element analysis calculated has compared, had proven the whole method modelling's finite element analysis method's rationality and rolled the circle - under roller contact stress the result accuracy; Finally, uses ANSYS APDL the re-development technology, in view of 2 grades of rotary kilns, rolled the circle - under roller contact stress the overall finite element analytic method to carry on the re-development.

首先，本文介绍了2档回转窑工作原理和装置，对滚圈的力学行为进行了分析，提出了基于筒体-窑衬-大齿圈-滚圈-托轮的回转窑整体建模，对滚圈-托轮的接触应力进行有限元分析的方法，并得到了滚圈接触应力的大小和分布规律，结果表明滚圈接触应力在一周内主要存在两个主要的峰值和突变，都出现在滚圈与托轮接触区域；然后，把滚圈的受力看成是主应力未知的平面应力的测试，利用比较成熟的现代测试技术，提出了滚圈应力测试的原理和方案，并对滚圈的应力进行了现场测试，现场测试分析结果与有限元分析计算出的应力相比较，证明了整体法建模的有限元分析方法的合理性和滚圈-托轮接触应力的结果的正确性；最后，利用ANSYS的APDL的二次开发技术，针对2档回转窑，就滚圈-托轮接触应力的整体有限元分析法进行了二次开发。

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。

Aimed to the problems of difficult installation and low measurement accuracy in high moisture, the grain moisture sensor has improved from the traditional parallel polar plate probe to plane polar plate probe. The plane polar probe with protect pole was used to decrease the affect of the stray capacitance and interference, and some critical parameters of the plane polar probe that influenced sensitivity and accuracy of the sensor were proposed. The finite element method was used to analyze the electric field and capacitance of the plane polar probe.

针对谷物水分传感器平行极板探头安装难度大、高水分测量精度低等问题，将平行极板探头结构改进成为平面极板探头结构，并且通过增加保护极板减小干扰和杂散电容的影响，提出影响传感器敏感性、精度的平面极板探头的几个参数，采用有限元分析方法较精确分析了探头的电场分布和电容。

A typical case of polar low occurred on 26 February 1996 over the Sea of Japan is investigated. The analysis exhibits the spatial structures at different stage of this polar low event. At the initial stage of the polar low, the largescale environmental condition is characterized by a strong baroclinic zone in the low-level (below 700 hPa). The upper-level environmental circulation is almost barotropic. At the mature stage, a high IPV anomaly is situated over the surface polar low and a shallow layer of instability overtops the polar low center.

通过对1996年2月26日发生在日本海上的一个典型的极地低压个例的分析，揭示了极地低压在不同阶段的空间结构：在初始阶段，低层（700hPa以下）的大尺度环流场具有明显的斜压结构，而上层环流场基本上是正压的；在成熟阶段，极地低压的地面中心的上方IPV具有正异常，极地低压地面中心之上有一个浅的不稳定层。

The relationship between the minimum zone circle, minimum circumscribed circle and maximum inscribed circle was studied. Based on their relationship, the minimum zone circle and minimum circumscribed circle, maximum inscribed circle were transformed mutually.

本文研究了最小区域圆与最小外接圆、最大内接圆特征点的相互关系，实现了最小区域圆与最小外接圆、最大内接圆的相互转化，可有效解决最小区域圆的误差评定。

Yangtze Delta Urban Economic Circle, Zhujiang Delta Urban Economic Circle, Beijing-Tianjin-Hebei Urban Economic Circle, Chengdu-Chongqing Urban Economic Circle, and Wuhan Urban Economic Circle are five important urban economic circles, among which, four economic circles except Wuhan Urban Economic Circle have club convergence phenomenon and this club convergence is greatly related to industrialization degree, inner economic structure and innovative ability of the five economic circles.

长江三角洲城市圈、珠江三角洲城市圈、京津冀城市圈、成渝城市圈、武汉城市圈是我国五个重要的城市圈；其中，除武汉城市圈外其他四个城市圈均存在不同程度的俱乐部趋同，而且这种趋同和五大城市圈的工业化程度、内部经济结构及创新能力有很大关系。

December 12, 2006 in Yanglin in support of the main ring began to run, followed by Circle in the sharp group blog Management Forum team support, advice and help, in the high mountains on being aware of small, Taoyuan Daisen, high quality, such as Cong-jie joined the circle of the Lord, in the main consisting of classic circle the tireless efforts of the management team, we were sharp double blog and Sina blog circle circle of outstanding performance -82 million in the 620,000 rise blog circle

去年的今日，在和群体文化交流的基础上，我们从横向的博圈交流向跨越网站的博客文化传播领域延伸，我和一群不怕争议不畏艰难的创新者大胆的尝试着，并以身体力行的榜样作用协同团队成功的组织了以下活动

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It is found that the upper limit of the operational frequency bandwidth along the short great circle path which crosses the south-polar, region is approximately in accord with the calculated MUF and the other one along the long great circle path which crosses the north- polar region is different from the calculated MUF.

结果表明，经过南极区的短大圆路径的通信频段上限与计算的MUF基本相符；经过北极的长大圆路径的通信频段上限与计算的MUF有偏差。

Just so you know where we're going...

只要让你知道我们的目标。。。

One of his friends acted as the gobetween in his business.

在这件事中，他的一个朋友充当了中间人。