在混合均匀的铜颗粒和玻璃颗粒受到不同加速度Г和频率f的正弦振动怍用下,获得了巴西果(BN)、反巴西果(RBN)、三明治(Sandwich)的不同分层相构型及其相图,首次观测到小颗粒在上大颗粒在下的稳定的反巴西果分层(reverse Brazil Nut segre...在混合均匀的铜颗粒和玻璃颗粒受到不同加速度Г和频率f的正弦振动怍用下,获得了巴西果(BN)、反巴西果(RBN)、三明治(Sandwich)的不同分层相构型及其相图,首次观测到小颗粒在上大颗粒在下的稳定的反巴西果分层(reverse Brazil Nut segregation)现象,还观测到区分不同分层区域的Г值具有滞后效应,表明分层过程与系统的初始条件有关.展开更多
According to the dipole transition selection rules and by choosing proper transition channels, it is found that the inverted Y-type four-level scheme can be classified into nine different 2nd-order subschemes when usi...According to the dipole transition selection rules and by choosing proper transition channels, it is found that the inverted Y-type four-level scheme can be classified into nine different 2nd-order subschemes when using corresponding laser fields, and they can be further classified into eighty 3rd-order subschemes in detail according to different exciting intensities that are applied in different channels. In this paper, the structure multiformity of inverted Y-type four-level scheme is discussed and the demonstrations on some subschemes are also given. At the same time, the subschemes which have been studied are pointed out, but most of them have not been researched to the best of our knowledge.展开更多
文摘在混合均匀的铜颗粒和玻璃颗粒受到不同加速度Г和频率f的正弦振动怍用下,获得了巴西果(BN)、反巴西果(RBN)、三明治(Sandwich)的不同分层相构型及其相图,首次观测到小颗粒在上大颗粒在下的稳定的反巴西果分层(reverse Brazil Nut segregation)现象,还观测到区分不同分层区域的Г值具有滞后效应,表明分层过程与系统的初始条件有关.
基金supported by the Research Starting Funds of Tianjin Polytechnic University (Nos.20080033,20080057 and 20070010)University Research Program of Tianjin Municipal Education Commission (No.20070505)
文摘According to the dipole transition selection rules and by choosing proper transition channels, it is found that the inverted Y-type four-level scheme can be classified into nine different 2nd-order subschemes when using corresponding laser fields, and they can be further classified into eighty 3rd-order subschemes in detail according to different exciting intensities that are applied in different channels. In this paper, the structure multiformity of inverted Y-type four-level scheme is discussed and the demonstrations on some subschemes are also given. At the same time, the subschemes which have been studied are pointed out, but most of them have not been researched to the best of our knowledge.
