# 需要导入模块: from astropy import units [as 别名]# 或者: from astropy.units importdimensionless_unscaled[as 别名]defevaluate(self, x, NH, redshift):ifisinstance(x, astropy_units.Quantity): _unit = astropy_units.cm **2_y_unit = astropy_units.dimensionless_unscaled_x = x.valueelse:...
This is an important quantity used in mass spectrometry, for example, in depicting the ion signal dependence on this dimensionless parameter. In the case of multi-degree mass spectrometry, this method can be applied to chemical structure determination. Info: [C86]. Sign in to download full-size...
In the nondimensionalization, firstly the characteristic length L and characteristic velocity U are selected, and then the nondimensional basic quantities can be obtained according to the ratio of the basic quantities to the characteristic quantity. It is convenient to nondimensionalize the continuity ...