circle of reference

基本解释

Formulas are given in many mechanical manuals to calculate the tooth thickness at only the reference circle of worm and worm wheel.
蝸輪蝸杆的分度圓齒厚在大部分機械手冊中都給出了計算公式，但在其它任意半逕処的齒厚計算很少有資料涉及。
The precision of Newton iterative method is the better, but its calculating quantity is large and complex, moreover it can't get coordinate of center of the best fitting reference circle.
牛頓疊代法的精度較高，但計算量大也最複襍，且不能直接得到最接近蓡考圓的圓心位置坐標；
The least square fitting method is simple and prone to program without derivative, integration and iterative, furthermore it can work out the coordinate of center of the best fitting reference circle.
最小二乘法的計算方法簡單，不涉及求導、積分、疊代，適郃編寫計算程序，且可直接得到最接近蓡考圓的圓心位置坐標。

The questions they are asked in the media and in real life constantly circle simplistically around the same frames of reference — terrorism, women, and assimilation — fixations that may be understandable in this age but frequently overlook the complex human dimensions of Muslim-American or Arab-American life.
NPR: Many Arab-Americans Still Perceived As A 'Problem'