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For multi-phase flow in pipelines, the distributions of the individual phases are of significant importance. For this reason a low-energy gamma-ray tomography system has been designed. The set-up uses a 241Am source along with a CdZnTe array to acquire gamma ray attenuation data in different positions of a cross-section plane around a test pipe. A charge sensitive amplifier (CSA) and a fourth-order...
This paper presents a versatile hardware architecture that implements six variant of the CFAR detector based on linear and non-linear operations. Since some implemented CFAR detectors require sorting, a linear sorter based on a first in first out (FIFO) schema is used. The proposed architecture can be used as a specialized module or co-processor for software defined radar (SDR) applications. The results...
In the paper we describe a method to extract the topography of an impressed current for our bounded electrical impedance tomography (bEIT) studies. The frequency of the impressed current is low (up to a few hundred Hz), and is buried in background EEG and other noise. For the development of the extraction method, special consideration is given to maximize the signal-to-noise ratio. The standard lock-in...
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