Ion balance study showed that the precipitation acidity was not decided on acid ion concentrations only, but manly decided on basic ion concentrations which neutralized acid ion in Wuhan city proper.
Thermodynamic calculation on balance of multi-phases and multi-components was used to analyze the precipitation and transformation of inclusions in high purity carbon-manganese steel with La or Ce.
用多相、多组元平衡的热力学计算方法，对稀土碳锰纯净钢中夹杂物的析出和转化进行了计算。
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Based on the principle of soil water balance, including precipitation, temperature and other observations, this article built a model of soil drought index.