angles at a point 中文意思是什麼

angles at a point 解釋
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  • angles : n. 〈pl. 〉盎格魯族〈五世紀由 Schleswig （今德國北部）移住英國的條頓族的一支，其居住地即稱 Angle-land, 后轉為今名 England〉。
  • at : 1 Air Transport（ation） 2 【電學】 ampere turn 3 antitank 4 Atlantic Time 5 alternative technolo...
  • a : an 用在以母音音素開始的詞前〉 indefinite art 1 〈普通可數名詞第一次提到時，冠以不定冠詞主要表示類...
  • point : n 1 尖頭，尖端；尖頭器具；〈美國〉筆尖；接種針，雕刻針，編織針；小岬，小地角；【拳擊】下巴。2 【...
  1. The nine elements of the matrix are products of cosines of angles between the direction of a streamline at a point and the coordinate axis.

    這矩陣的9個元素系一點的流線方向和座標軸之間夾角餘弦的乘積。
  2. Along with the progress of drilling technology, many new types of bha such as steering motor assembly, dropping assembly with eccentric bend sub, dropping assembly with flexible connection are developed based on common building, dropping and holding assemblies. for using these bha, a new mathematical model is put forward for 3d static analysis of these types of bha under small deflection. and its weighted residual solution is given. the mathematical model includes ( 1 ) differential equations ; ( 2 ) boundary conditions at drill bit, stabilizer, bend angle, diameter change, tangential point and borehole wall ; ( 3 ) lateral forces and deflection angles of bit. the software based upon this method runs well

    為了更好地應用各種新鉆具，建立了適用於對普通下部鉆具、導向鉆具、帶偏心彎接頭和柔性接頭的下部鉆具進行三維小撓度靜力學分析的數學模型，包括（ 1 ）微分方程； （ 2 ）鉆頭、穩定器、彎角、變截面、切點和井壁的邊界條件； （ 3 ）鉆頭的側向力和鉆頭轉角.給出了該模型的加權余量解.用該方法編寫的軟體應用效果良好
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