Via an infinitesimal method, the author offers a computing formula for the moment of inertia of mass curves and mass cubes against any straight line in Euclidean space.
应用微元法给出了在三维欧氏空间中质量曲线和质量立体对任意一条直线的转动惯量的计算公式，并给出了对坐标轴的转动惯量的简化计算公式。
The author makes an initial discussion on how to clarify the origin and theoretical basis of infinitesimal method during the teaching of this very method in the application of definite integral.
针对在定积分应用的微元法教学过程中，就如何阐明微元法的来源、理论依据以及在实际应用中需注意的问题等进行初步的探讨。
In this paper, we study theoretically infinitesimal element method for calculation of stress birefringence in polarization maintaining fibers.
本文研究了计算保偏光纤中应力双折射特性的微元算法，对其计算值进行了理论验证。
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