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The traffic demand is increasing drastically, and millimeter wave (mmWave) bands have the potential to offer much higher throughput due to broad spectrum. We have two main contribution under urban NLOS mmWave cellular system. First, an orthogonality concept is used in spatial-time domain resource allocation to perform the scheduling, which gives consideration to throughput and fairness. Second, we...
Signal process method is very important in welding automation and arc sensor is a kind of welding-sensor which works on the relationship between welding current and arc length. The using of Wavelet transform (WT) for detecting of welding gun slop with arc sensor is discussed in this paper. Sensor structure is introduced at first, and then Wavelet transform (WT) is induced into its signal processing...
In order to control and reduce city gas accidents, it's very important to identify and analyze the relative risk factors existed in the city gas pipeline network comprehensively. Through the fault tree analysis, ??gas leakage?? was taken as the top event and four main reasons that led to gas leakage were found. According to above four reasons, the comprehensive fault trees were drew, which reflected...
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