basis meridian 中文意思是什麼

basis meridian 解釋
首子午線
  • basis : n. （pl. bases ）1. 基礎；基底；臺座；【地質學；地理學】坡基。2. 根據，基準。3. 主要成份；主藥。4. 【數學】基。
  • meridian : n 1 【天文學】子午圈[線]；正午。2 頂點，絕頂；全盛期。adj 子午圈的；正午的；頂點的，絕頂的；全盛...
  1. The prime meridian, which runs through greenwich in south - east london, became the basis for the world ' s time keeping in 1884 after the first astronomer royal, john flamstead, calculated that the earth rotated on its axis once every 24 hours

    1884年，首位皇家天文學家約翰法蘭姆斯坦算出地球每隔24小時繞軸自轉1次，使得通過倫敦東南格林威治的本初子午線成為全球計時基準。
  2. In this paper, on basis of the current machining state, a testing principle on aspheric surface is put forward to, the principle is a kind of touching method by testing the meridian of aspheric surface and comparing it with the theoretical curve, so surface figure error is got. according to this principle, mechanical structure is designed and electric - control system is researched

    本文首先基於現階段非球面的加工狀況，提出了用接觸式檢測非球面的子午面面形曲線並與理論曲線相比較，從而得到非球面面形誤差的檢測原理，並根據該原理進行了機械結構的總體設計和電控系統的研究。
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