) 热量衡算式(Energy Equilibrium Equation) 动量衡算式(Momentum Equilibrium Equation) 参数计算式(Parameter Equation) 必要性，工业反应器规模变化时，不仅产生量的变化， 而且产生质的变化，这样一定规模的实验得到的模型可 能不适用，必须修正；.
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对于截面形式较复杂的T形梁，提出了有关的参数计算式，仍可利用图表，通过简单迭代过程，求得T形截面开裂后的中和轴位置。
With the help of some formulae and simple iteration procedures the table and the diagram mentioned above can also be used for locating neutral axis of t beams.
给出了相应的电流和功率计算式，为设计电炉参数提供了依据。
The paper also gives the relective calculating formula of current and power. and affords basis for designing electric furnace parameters.
提出正弦齿条所生成的齿轮副的重合度定义及其计算式，并且讨论有关设计参数对于重合度的影响效果。
Definition of contact ratio of paired gears generated with sinusoidal rack and its calculation formula were given, and the effect of related design parameters on the contact ratio was also discussed.
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