• 1. Energy Variation Method: 能量变分法
• 2. Ritz energy variation method: 里兹能量变分法

• 1.The shear-lag effect on the prestressed RPC simply-supported box girder is studied by FEA method and energy variation method.
  用有限元法和能量变分法对预应力活性粉末混凝土简支箱梁的剪力滞效应进行研究。
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• 2.Data calculated by this method is exact, which show that the method is suit to the calculation of energy variation and critical radii.
  根据这一计算方法能得到较为准确的数据，说明了本方法能较好地计算出水合物生成的能量变化和临界半径。
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• 3.By method of chain iteration, the amount of energy saving can be calculated with single variation of any one of four main factors.
  进而用“连锁替代法”推导出上述四个因素单独变化带来的节能量。
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