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In this paper, the complicated arc phenomena in air dc circuit breakers that are widely used in rail transit and vessels are investigated with both experimental and numerical approaches. Initially, the basic arc motion characteristics in the switch are presented by the recorded waveforms and images in the carefully designed breaking experiments. Phenomena of arc stagnation and back commutation are...
Online social networks have recently become an effective and innovative channel for spreading information and influence among hundreds of millions of end users. Most of prior work either carried out empirical studies or focus on the information diffusion modeling in temporal dimension, little attempt has been given on understanding information diffusion over both temporal and spatial dimensions. In...
This paper is concerned with modeling the time-varying UWA channel in Stratified Ocean. The time-varying multipath characteristic of underwater channel imposes strong limitations on acoustic communication transmission. To analyze the characteristic of underwater acoustic channel, a method is proposed based on Rayleigh distribution. Eigen-rays are searched on the basis of the ray theory, that is, eigen-rays...
This text applied the theory of society networks to enterprise crisis management team, and established the society networks model; the model provided the maneuverability for the manager to improve the operative efficiency of enterprise crisis management team. Managers can improve working efficiency by increasing the network density of the team. According to the members' position within the network,...
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