The paper presents a digital color image watermarking scheme using a hypercomplex numbers representation and the quaternion Fourier transform (QFT). Previous color image watermarking methods are first presented and the quaternion representation is then described. In this framework, RGB pixel values are associated with a unique quaternion number having three imaginary parts. The QFT is presented; this transform depends on an arbitrary unit pure quaternion, μ. The value of μ is selected to provide embedding spaces having robustness and/o...
A sliding mode controller for the photovoltaic pumping system has been proposed in this paper. This system is composed of a photovoltaic generator supplying a three-phase permanent magnet synchronous motor coupled to a centrifugal pump through a three-phase voltage inverter. The objective of this study is to minimise the number of regulators ...
Solar-powered quadcopters have the potential to revolutionize the way we think about aerial transportation and surveillance. These aircraft can potentially fly for extended periods of time without the need for external fuel, making them ideal for a wide range of applications. In this paper, we present a modeling and simulation approach for a solar-powered quadcopter using MATLAB. The model includes the quadcopter’s dynamics, solar panel power generation, and energy storage system. A PID control system for the solar-powered quadcopter s...
While traditional methods for modelling the thermal and electrical behaviour of photovoltaic (PV) modules rely on analytical and empirical techniques, machine learning is gaining interest as a way to reduce the time, expertise, and tools required by designers or experts while maintaining high accuracy and reliability. This research presents a data-driven machine learning tool based on artificial neural networks (ANNs) that can forecast yearly PV electricity directly at the optimal PV inclination angle without geographic restrictions and is v...
Power distribution grids (PDGs) are one of the main parts of electrical logistic chains with the task of transferring electricity to the consumers continually. Adverse weather conditions, equipment failure, and human disruption can bring about the PDGs to faulty situations leading to the inevitable interrupting power consumption which results in financial losses. Therefore, it is vital to locate the faulty spot accurately and quickly. In this paper, an automatic deep learning framework is implemented to locate faults in the PDGs with limited...
This paper presents ? numerical solution of a non-similar two-dimensional boundary-layer flow over a cylinder. The assumptions and related two-dimensiona...
The opaque photovoltaic thermal (PVT) produces both thermal and electrical energy. In order to increase thermal energy, we have considered flexible (Al-based) photovoltaic (PV) module for the present study. Further, we have considered thermo-electric cooler (TEC) integrated with flexible PV module to enhance electrical power. As a result, an overall power can be increased in flexible PVT-TEC collector. A concept of series and parallel combination of flexible PVT-TEC collectors is proposed to optimize series (n) and parallel (m) combinations ...
We investigate the tanh-coth method's usefulness in understanding space-time fractional nonlinear evolution problems. To use this method and then examine their plots, we take into consideration three significant equations: the space-time fractional Burgers equation, the space-time fractional regularized long wave equation, and the space-time fractional Boussinesq equation. The modified Riemann-Liouville derivatives are used to define the fractional derivative. The approach provides a linearization-or small perturbation-free analytical soluti...
Based on the previous web tool, I developed a Matlab software, netVisual, for generating a HTML file from which the user-interface interactive network can be visualized in the web browsers. In the network, the user can mouse-press any node to drag the network, to examine network topology, and to evaluate node centrality, etc. It can be freely used and run on popular web browsers as Chrome, etc. Both netVisual and demonstration data files are given. ...
Questionnaires for blending teaching e?ect evaluation from the perspective of science, tech- nology, engineering, arts, and mathematics (STEAM) were reviewed in this study, and mea- surement problems for the questionnaire were designed. E?ects of online and o?ine teaching ...
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