A magnetic field was used to directional solidification of dendritic Al-Cu alloys.The primary arm spacing of the dendrit......

考虑铁电晶体热电能量转化回热循环的有限时间性以及热阻和铁电介质的损耗等不可逆因素，定义回热循环能量转化的特征参量λ，对循环性......