无因次特性(线),无量纲特性;
On the basis of least square and law of similarity of ventilator, the dimensionless performance curve equations of mine ventilator by operating data are fitted and the characteristic curve equation of mine ventilating network according to its characteristic factors is constructed.
本文运用最小二乘法和通风机的相似定律,用实测数据拟合了矿井通风机无因次性能曲线方程;
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