To the 2-dof mechanism, the basic coordinate transformation is deduced and relationships among various parameters are analyzed with the theory of spatial mechanism.
针对此2自由度空间机构运动，运用机构学理论，推导了这一空间机构的基本坐标变换，建立了各参数之间的内在关系。
Based on limit equilibrium theory, a basic coordinate system and an auxiliary coordinate system are set up according to the size and geometrical relationship of slope.
基于极限平衡理论，根据边坡尺寸及几何关系，建立辅助坐标系与基本坐标系。
Results: Through psychological nursing, greatly improved the trouble psychology, the sense of fear reduced obviously, 85% above trouble could coordinate or basic coordinate treatment nursing.
结果：通过心理护理，大大地改善了患儿的心理状态，恐惧感明显减轻，85%以上的患儿能配合或基本配合治疗护理。
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