Spectrum analysis of radiotracer residence time distribution for industrial and environmental applications

Kasban, H.; Hamid, Ashraf

doi:10.1007/s10967-014-2924-5

Cited by 11 publications

(2 citation statements)

References 10 publications

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“…The fundamental basis of cross Bi-spectrum is a Fourier transform of the third-order cumulant series [36]. Therefore, the cross bi-spectrum was previously defined [54]. An algorithm describing the extraction of characteristics from statistics of a high order is therefore investigated as shown in Fig.…”

Section: Statistical Power Of Ofdma Signal Recognitionmentioning

confidence: 99%

Development of Signal Recovery Algorithm for Overcoming PAPR in OFDMA Communication System

Emarah

Tokhy

Kasban

2021

Arab Journal of Nuclear Sciences and Applications

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This paper focuses on overcoming the high Peak to Average Power Ratio challenging within Orthogonal Frequency Division Multiplexing Asynchronous (OFDMA) communication system. This signal is modulated using differential phase-shift keying and quadrature amplitude modulation techniques. It is degraded under different noise attacks. Signal recovery algorithms are supposed for overcoming the high peak power problem. This issue is resolved through the detection of maximum peaks within threshold peak values of the power amplifier output signal. Additionally, these peaks are identified depending on the extracted power density and order statistics features. This system is trained using an artificial neural network under different channel impairments. Besides, the error rate of this network is computed in presence of different channel fadings. Rayleigh fading imposes the best performance for the transmitted OFDMA signal. Moreover, recognition of 100% is attained using the high order statistics compared to the power density features in presence of noise attacks.

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Section: Statistical Power Of Ofdma Signal Recognitionmentioning

confidence: 99%

Development of Signal Recovery Algorithm for Overcoming PAPR in OFDMA Communication System

Emarah

Tokhy

Kasban

2021

Arab Journal of Nuclear Sciences and Applications

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“…They cannot be applied to pilot-scale and large-scale industrial systems because of their many disadvantages [5][6][7], such as low detection sensitivity, required physical-chemical compatibility and unsuitability for online detection for most of the phases in industrial processes. These disadvantages of the conventional tracer techniques are overcome by radiotracers [8][9][10]. Furthermore, multiple radiotracers can be simultaneously used for tracing different phases because emission of characteristic gamma radiations can be detected by spectroscopic measurements [11].…”

Section: Introductionmentioning

confidence: 99%

Optimization of injected radiotracer volume for flow rate measurement in closed conduits

Pavlović

Bartl

et al. 2020

Hem Ind

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In chemical processes it is essential that the flow in the process is accurately defined. Fluid velocity measurements are important for fluid flow quality performance in flow systems. This study focuses on determination of the volumetric flow rate and its standard (relative) deviation for calibration of conventional flow meters by using a radiotracer approach. The measurements for flow meter calibration were performed at a pilot-scale flow rig using Technetium-99 m (99m Tc) as a radiotracer in the form of pertechnetate ion (99m TcO4-). The measured data were analyzed, and precision of the experimental setup was investigated under two different approaches-IAEA's RTD software and sum approximation of raw data. For the first time, the variation of standard deviation of calculated flow rate with the injection volume and activity of the radiotracer was determined. Plug flow with axial dispersion was used to simulate the measured RTD curves and investigate the flow dynamics of the flowing water. The results of the study have shown the possibility of in situ calibration of flow meters with a relative error lower than 1 %. They also revealed a slight dependency of the precision of output results on the injection volume as well as similar results for manual and specialized RTD software data processing.

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Efficient fault detection and diagnosis of distillation column using gamma scanning

Elsharkawy

Hammad

2018

J Radioanal Nucl Chem

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Spectrum analysis of radiotracer residence time distribution for industrial and environmental applications

Cited by 11 publications

References 10 publications

Development of Signal Recovery Algorithm for Overcoming PAPR in OFDMA Communication System

Development of Signal Recovery Algorithm for Overcoming PAPR in OFDMA Communication System

Optimization of injected radiotracer volume for flow rate measurement in closed conduits

Efficient fault detection and diagnosis of distillation column using gamma scanning

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