polar axis 中文意思是什麼
polar axis
解釋
極軸（天文）-
From the standpoint of the gyrocompass the earth appears to be rotating about an axis making an angle ε with the true polar axis.
從陀螺羅盤的位置觀察地球，好象地球是繞著偏離其極軸角的一個軸在移動。 -
< uk > from the standpoint of the gyrocompass the earth appears to be rotating about an axis making an angle with the true polar axis. < / uk >
< uk >從陀螺羅盤的位置觀察地球，好象地球是繞著偏離其極軸角的一個軸在移動。 < / uk > -
Because of its oblate shape, the moment of inertia of the earth is a maximum about the polar axis and minimum about an axis in the equatorial plane.
由於地球是扁球體，繞極軸慣量矩最大，而繞在赤道面內的軸的慣量矩最小。 -
The properties of the key optical and electrical devices and the controlling mode in the system are put forwards. using the polar coordinate lines with different directions and the circulars with the same axis can be written together. by using he - cd laser ( 442nm ) as writing light source, the system can directly write line with width 05 # m on a sample
本文的主要目的是建立了一種極坐標和直角坐標相結合的激光直寫系統的原理樣機，探討系統的各部分器件的基本性能要求，為今後研製高精度激光直寫系統做好工作基礎，分析了激光直寫系統中關鍵器件的性能要求，基本控制方式，實現了極坐標方式下，任意旋轉角度直線圖形與共心圓環的光刻。 -
In hong kong, the polar axis should point north and the elevation should be 22. 5
在香港，極軸應指向天球北極，而仰角則為22 . 5度 -
The alignment of the polar axis and the monitoring of the guiding process require absolute accuracy
極軸的擺放及追蹤過程必須十分準確。 -
The polar axis should point to the celestial pole around which all stars seem to rotate and the elevation of the axis should be the same as the latitude of the location
赤道儀的極軸必須對準星空的轉動中心，而仰角則相等於拍攝地點的緯度。 -
Then, the minimum circumscribed circle and shape principal orientation of the object region are calculated ; and the object region is divided into some blocks in the polar coordinate, which uses the center of the minimum circumscribed circle as the origin and the direction of the shape principal orientation as the direction of the polar axis, and the features of all subblocks are extracted to compose shape histograms and then smoothed ; then, combined with global features to synthetically represent the content of the image ; finally, a new image similarity is used to compute the distance between images
首先對商標圖像進行預處理，得到規則二值圖像;計算目標像素的最小外接圓和圖像的形狀主方向;在以最小外接圓圓心為原點、形狀主方向為極軸方向的極坐標中將圖像分塊，提取各子塊特徵，構成形狀直方圖並平滑處理;再結合全局形狀特徵來綜合表示圖像內容;最後採用新的相似性度量方法計算圖像間距離，實現商標圖像的準確檢索。
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