The calculation equation of acidity of acid ammonium salt solution was derived by using the proton balance equation(PBE). Under approximate condition,the pH of solution could be calculated conveniently if only the corresponding ionization constant was given. The result was basically coincide with the found value. It was practically important to teaching of nonchemical profession.
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Meanwhile, the distribution drived under certain condition is approximate to that of PASCAL.
同时，还推得在一定条件下，这种分布是近似于巴氏分布。
This paper presents a new sufficient condition under which the linear t s fuzzy systems can uniformly approximate any real continuous functions defined on a compact set to any degree of accuracy.
提出了线性t - S模糊系统以任意精度一致逼近紧致集上任意连续实函数的一个充分条件，并给出了数值示例。
Based on the consolidation theory of ground with vertical drains under the condition of equal vertical strain, approximate theory settlement curve calculation method is put forward.
通过实测沉降资料与近似理论曲线的拟合，获得竖向排水井地基的最终沉降量和平均固结度，从而预估其工后沉降量。
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