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分析了晋煤计算机网络存在的安全隐患,提出了9种确保晋煤企业计算机网络安全的技术措施。 相似文献
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本文使用ABAQUS软件建立某压力容器的二维轴对称数值计算模型,采用热-结构序贯耦合分析方法对其内压和温差引起的应力进行计算,获得了容器综合应力的分布规律,为其安全设计提供依据。 相似文献
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杨永宏 《东南大学学报(自然科学版)》1996,26(3):136-138
无序金属薄膜中的局域化和相互作用效应杨永宏(东南大学物理学系,南京210018)由于弱局域化效应和相互作用效应的影响,无序金属薄膜的电阻率与玻耳兹曼输运理论的结果有很大的偏离.近年来,该方面的实验和理论研究均已取得丰硕的成果[1~4].Ovadyah... 相似文献
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Spin and valley half metal induced by staggered potential and magnetization in siliceneSpin and valley half metal induced by staggered potential and magnetization in siliceneSpin and valley half metal induced by staggered potential and magnetization in silicene
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We investigate the electron transport in silicene with both staggered electric potential and magnetization; the latter comes from the magnetic proximity effect by depositing silicene on a magnetic insulator. It is shown that the silicene could be a spin and valley half metal under appropriate parameters when the spin-orbit interaction is considered; further, the filtered spin and valley could be controlled by modulating the staggered potential or magnetization. It is also found that in the spin-valve structure of silicene, not only can the antiparallel magnetization configuration significantly reduce the valve-structure conductance, but the reversing staggered electric potential can cause a high-performance magnetoresistance due to the spin and valley blocking effects. Our findings show that the silicene might be an ideal basis for the spin and valley filter analyzer devices. 相似文献
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随着电子技术的不断发展,尤其是大功率的半导体硅原件和单片机技术的不断发展,使得电子中的励磁系统有很大的改进,励磁系统的稳定性也在不断的提高.励磁系统就是指,供给同步发电机的励磁电流极其附属的设备.励磁系统单元向同步发电机转子提供励磁电流.励磁系统的自动励磁调节器对提高电力系统并对联机组的稳定性具有很大的作用.目前的电力系统的发展导致机组的稳定性极限变得很低,这也将促使励磁技术在不断的发展.但是,励磁系统也会引起系统的减量以及停车仍会发生,特别是在化工企业中,由于励磁系统发生的故障,而导致发电机停止转动,将会使生产线停止生产,给企业的效益带来影响.本文详细的对励磁系统中常见的故障进行了分析及提出了相应的改进措施. 相似文献
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探讨试误教学法的基本模式,将NOBOOK虚拟平台融入中学物理教学,以“家庭照明电路”为例采用试误教学法开展教学探究,旨在促进学生批判性思维的发展. 相似文献
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We investigate the electron transport in silicene with both staggered electric potential and magnetization; the latter comes from the magnetic proximity effect by depositing silicene on a magnetic insulator. It is shown that the silicene could be a spin and valley half metal under appropriate parameters when the spin–orbit interaction is considered; further, the filtered spin and valley could be controlled by modulating the staggered potential or magnetization. It is also found that in the spin-valve structure of silicene, not only can the antiparallel magnetization configuration significantly reduce the valve-structure conductance, but the reversing staggered electric potential can cause a high-performance magnetoresistance due to the spin and valley blocking effects. Our findings show that the silicene might be an ideal basis for the spin and valley filter analyzer devices. 相似文献
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We theoretically investigate the spin transport properties of the Cooper pairs in a conventional Josephson junction with Rashba spin-orbit coupling considered in one of the superconducting leads.It is found that an angle-resolved spin supercurrent flows through the junction and a nonzero interfacial spin Hall current driven by the superconducting phase difference also appears at the interface.The physical origin of this is that the Rashba spin-orbit coupling can induce a triplet order parameter in the s-wave superconductor.The interfacial spin Hall current dependences on the system parameters are also discussed. 相似文献
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