Based on the visual work principle of structure analysis, a general formula for the displacement calculation is deduced for the static analysis of the beam on elastic foundation.
根据结构分析中的虚功原理推导弹性地基梁位移计算的一般公式，介绍了连续弹性地基梁的静力分析方法。
A qualitative analysis of hologram with double beam interference and grating diffraction principles given in general physics is given.
基于普物光学的双光束干涉和光栅衍射，定性分析全息照相。
The general relation between the damage and strain of the beam cross-section is set up and the stress-strain curves of cross-section are made, through the analysis on cross-section balance.
通过截面平衡分析，建立了混凝土损伤指标与截面应变关系的一般公式，并得到截面广义力—位移关系曲线。
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