2Miller MR,Hankinson J,Brusasco V,et al.Standardisation of spirometry.ATS/ERS Task force Standardisation of lung function testing(Ⅱ)[J].Eur Respir J,2005,26:319-338.
3Miller MR,Crapo R,Hankinson J,et al.General considerations for lung function.ATS/ERS Task force:Standardisation of lung function testing (Ⅰ)[J].Eur Respir J,2005,26:153-161.
4Pellegrino R,Viegi G,Brusasco V,et al.Interpretative strategies for lung function tests.Standardisation of lung function testing (Ⅴ)[J].Eur Respir J,2005,26:948-68.
1Willatzen M. Ultrasonic flowmeters : temperature gradients and transducer geometry effects [ J ]. Ultrasonics, 2003,41 ( 2 ) : 105 - 114.
2Huang Y S. An ultrasonic temperature and distance measurement system with self interference and self temperature compensation techniques [ D ]. Tainan: Department of Electrical Engineering, National Cheng Kung University ,2009.