The paper studies the form invariance of differential equations of motion for holonomic systems in terms of quasi coordinates, under the infinitesimal transformations of groups.
研究完整力学系统准坐标表示的运动微分方程在群的无限小变换下的形式不变性。
Before our country join world trade, some western hotel financial groups copy early quasi - bead triangle region.
我国加入世贸之前，一些西方饭店财团早就描准了珠三角地区。
This paper gives necessary and sufficient conditions for the Semidirect and Wreath Products of two semigroups to be Rectangular Quasi-Regular Semigroups (Rectangular Groups).
给出了两个半群的半直积和圈积为矩形拟正则半群和矩形群的充要条件。
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