本文在已有的索单元力密度矩阵的基础上推导了三角形膜单元的力密度矩阵。
On the basis of force density matrix of cable element, a force density matrix of triangle membrane element is introduced.
作出力的三角形，可以决定连杆中的力。
By making a force triangle, the force in the connecting rod can be determined.
目前在扫描力显微镜中经常用到的氮化硅三角形探针本身可以作为一个基于点微射干涉的微干涉元件。
A new optical interferometer suitable for using in the scanning force microscope is presented. The cantilever itself is used as a micro interferometer element.
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