By using the coherent quantum transport theory and transfer matrix method,the transmission coefficient and tunnel magnetic resistance for polarized electrons with different spin orientations through ferromagnetic/semiconductor/ferromagnetic tunnel junctions are investigated.
采用相干量子输运理论和传递矩阵方法研究了具有不同自旋指向的极化电子渡越铁磁/半导体/铁磁隧道结的隧穿几率和隧穿磁电阻。
By using the coherent quantum transport theory and transfer matrix method,the transmission coefficient and spin polarization for polarized electrons with different spin orientations through ferromagnetic/semiconductor/ferromagnetic heterostructures have been investigated.
采用相干量子输运理论和传递矩阵方法,研究了具有不同自旋指向的极化电子渡越铁磁/半导体/铁磁异质结构的隧穿几率和自旋极化率。
The effect of the corona charging, electric field polarizing and neutralizing particles cases on the commercial fibrous filter filtrating fly ash has been investigated experimentally, including pressure drop, penetration and the change of the single particle charge between upstream and downstream.
实验研究了在商用的纤维滤料中,窄分布飞灰颗粒在电晕荷电、电场极化及静电中和器中和等外加条件对过滤压降、穿透率以及上游颗粒与逃逸下游颗粒的荷电分布特点的影响。
Measurements of mean residence time and penetration of submicrometer aerosols in flows in tubes were made within the range of Reynolds numbers from 0.
在Reynolds数 0 0 7～ 0 2 6范围内 ,采用亚微米聚苯乙烯球形硬气溶胶粒子脉冲 ,测定了气溶胶粒子在毛细管扩散池组中的谱带展宽 ,由此获得了气溶胶在毛细管中的平均保留时间和穿透率 。
Presents the calculation methods of particle deposition velocity,deposition quantity and penetration rate in smooth ventilation ducts.
给出了光滑通风管道内颗粒沉降速度、沉降量和穿透率的计算方法,对光滑风道内颗粒的沉降规律、风道的过滤作用、风道所需的清洗周期进行了模拟分析。