Objective To assess brain injury in early prematures with asphyxia using ultrasound acousticradiationforce impulse imaging (ARFI).
目的探讨应用超声声脉冲辐射力成像技术(ARFI)在窒息后早产儿脑损伤中的临床应用价值。
2
The structure acousticradiation caused by longitudinal vibration of shafting is reduced by changing excitation force propagation path and adopting vibration isolator or dynamic vibration absorber.
改变轴系纵振激励传递途径，在轴系上安装纵振减振器或动力吸振器以降低结构水下辐射噪声。
3
The radiation noise by the coupling effect of the filter's case and the interior acoustic chamber is computed when the air filter is excited by the simulated engine force.