By taking the neutral hard sphere-charged hard sphere mixture as reference fluid, an EOS for density calculation is developed with perturbation theory.

以硬球-静电硬球为参考流体，采用微扰理论建立了电解质溶液的状态方程。

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The floatation mechanism of dixanthogen used as a metal collector is explained by the results of charge density calculation of the atoms in its molecule.

本文通过对原子电荷密度的计算，解释了复黄原酸作为金属捕收剂的作用机理。

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Calculation results show that the density of over-voltage protector increase, reduce the induced over-voltage.

计算结果表明，过电压保护器的密度增加，感应过电压降低。

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