电涌保护器(SPD)是一种能够有效减少雷击电磁脉冲对电气、电子系统设备的危害及防御雷电灾害的装置,在防雷工程中应用十分广泛,而 SPD 的专用过电流后备保护器(SCB)技术也日趋成熟,该技术可使防雷系统更加安全可靠运行。本文根据 SPD不...电涌保护器(SPD)是一种能够有效减少雷击电磁脉冲对电气、电子系统设备的危害及防御雷电灾害的装置,在防雷工程中应用十分广泛,而 SPD 的专用过电流后备保护器(SCB)技术也日趋成熟,该技术可使防雷系统更加安全可靠运行。本文根据 SPD不同使用工况的实际应用,结合建筑物雷电分区、接线形式、设备绝缘耐冲击电压等有关要求,对 SPD 及其专用过电流后备保护器 的选型及安装进行了相关阐述及探讨。展开更多
The investigation of the interplay between geometry and nonlinearity may open the road to the control of extreme waves. We study three-dimensional localization and dispersive shocks in a bent cigar shaped potential by...The investigation of the interplay between geometry and nonlinearity may open the road to the control of extreme waves. We study three-dimensional localization and dispersive shocks in a bent cigar shaped potential by the nonlinear Schro¨ dinger equation. At high bending and high nonlinearity, topological trapping is frustrated by the generation of curved wave-breaking. Four-dimensional parallel simulations confirm the theoretical model. This work may contribute to novel devices based on geometrically constrained highly nonlinear dynamics and tests and analogs of fundamental physical theories in curved space.展开更多
文摘电涌保护器(SPD)是一种能够有效减少雷击电磁脉冲对电气、电子系统设备的危害及防御雷电灾害的装置,在防雷工程中应用十分广泛,而 SPD 的专用过电流后备保护器(SCB)技术也日趋成熟,该技术可使防雷系统更加安全可靠运行。本文根据 SPD不同使用工况的实际应用,结合建筑物雷电分区、接线形式、设备绝缘耐冲击电压等有关要求,对 SPD 及其专用过电流后备保护器 的选型及安装进行了相关阐述及探讨。
基金the support of a grant from the John Templeton Foundation(58277)support by the European Research Council Grant ERC-POC-2014 Vanguard(664782)
文摘The investigation of the interplay between geometry and nonlinearity may open the road to the control of extreme waves. We study three-dimensional localization and dispersive shocks in a bent cigar shaped potential by the nonlinear Schro¨ dinger equation. At high bending and high nonlinearity, topological trapping is frustrated by the generation of curved wave-breaking. Four-dimensional parallel simulations confirm the theoretical model. This work may contribute to novel devices based on geometrically constrained highly nonlinear dynamics and tests and analogs of fundamental physical theories in curved space.
