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In recent years, high-speed railway represented by LanXinXian is gradually deeper into the desert area. As a result, the sand dust is a potential threat to the railway [1]. Lines in the sand-dust environment will cause friction between grain of sand and the surface of insulator, and then the surface become out of flatness, which will makes the surface of the insulator gathered a large number of charge,...
An artificial neural network for pollution evaluation is introduced in this paper which contributes to design an expert system for flashover predicting. The network measures four parameters (peak impulse current, maximum low-frequency current, humidity and voltage) which reflect the insulating property of an insulator and outputs the pollution level. After enough of training, the outputs of the network...
In this paper, leakage current flowing along contaminated ceramic insulators was separated into low frequency component and pulse component, which were detected respectively by Rogowski coil in artificial contamination tests. The effects of the operating voltage, the equivalent salt deposit density and humidity on the two characteristic components of leakage current were investigated. It is revealed...
Passive UHF (ultra high frequency) RFID (radio frequency identification) is a promising technology for products tracking in logistics. However, the UHF RFID tag is greatly affected by backside goods especially metallic objects. In this paper, we introduce a new technique to insulate the UHF RFID tag from backside objects. An electromagnetic band gap (EBG) material which is a good electromagnetic wave...
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