The equivalence between theorem of equal angle of view and reversible property of low pair, applied in synthesis of plane four-bar linkage, is demonstrated to reveal essence of their relation.
用几何法证明了等视角定理和低副运动可逆性在铰链四杆机构设计中的等价性，以求揭示它们之间的本质联系。
2
Based on the theoretic analysis of the anisotropic elastic constitutive relation, the reversible dilatancy was partly explained by the elastic dilatancy deformation caused by soils anisotropy.
The result explained that the favourable relation of irreversible Carnot cycle which has as time of absorption heat and rejection heat as endo-reversible Carnot cycle is optimum.