Category: Engineering
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Performance of hybrid Innegra-carbon fiber composites
Tensile testing Figure 2 shows typical debonding of Innegra and carbon interfaces for Innegra-carbon hybrids 2IC and 2IS respectively. The origin and progression of failure was along the Innegra-carbon layer interface. Figure 3 illustrates the onset and progression of failure. Figure 4 illustrates brittle failure of the 3DEP–3D/67 specimen. This failure mode is in contrast to the ductile…
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Fault-tolerant attitude control of the satellite in the presence of simultaneous actuator and sensor faults
In this section, the three-axis attitude control is designed for the spacecraft in two stages. Step 1:: A sliding mode controller without considering the actuator dynamics. Step 2:: A back-stepping sliding mode controller considering the actuator dynamics. Then, the simulation results of these two fault-tolerant controllers using thrusters and reaction wheel alone are presented. Design…
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Practical prototype for energy management system in smart microgrid considering uncertainties and energy theft
Hassan, M., Eladl, A., Sedhom, B. & Saeed, M. A new optimal centralized demand side management for a campus smart microgrid. In 2023 IEEE 32nd International Symposium on Industrial Electronics (ISIE), 19–21 June 2023, Helsinki, Finland. Norouzi, F., Hoppe, T., Elizondo, L. R. & Bauer, P. A review of socio-technical barriers to smart microgrid development.…
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Research on rheological behavior of fresh concrete single-cylinder pumping based on SPH-DEM
SPH method Fresh concrete is a multi-component complex material. The scale can be divided into two phases, namely, large-scale coarse aggregate solid phase and small-scale fluid phase. Smoothed particle hydrodynamics (SPH)25,26,27 is used to solve the fluid phase, which is a computational fluid dynamics method under the Lagrangian framework. In SPH, ‘particles’ represent the fluid…
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Impact of microalgae layer thickness on the treatment performance of drain water
The water scarcity problem in Egypt is widely increasing due to the increasing population, increasing standard of living, urban, and industrial activities. This led to an increase in the gap between water demand and available water resources. Therefore, the need for non-conventional water resources appeared1. Conventional water resources such as the Nile River, Groundwater, and…
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Sliding principal component and dynamic reward reinforcement learning based IIoT attack detection
The architecture of the proposed sliding principal component and dynamic reward reinforcement learning (SPC–DRRL) for detecting various IIoT network attacks method is depicted in Fig. 1, whereby there are three main phases, namely, the pre-processing phase, the feature selection phase, and the classification phases. Figure 1 Block diagram of sliding principal component and dynamic reward reinforcement…
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Azarshahr travertine compression strength prediction based on point-load index (Is) data using multilayer perceptron
Point-load test basics The act of applying an axial load to a precise point or region on the rock’s surface is known as point-loading, forming the fundamental principle of the point-load test. This loading procedure endures until the rock experiences failure or the sample is compromised. By closely monitoring this progression, the compressive strength of…
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A multiscale accuracy assessment of moisture content predictions using time-lapse electrical resistivity tomography in mine tailings
Robinson, D. A. et al. Advancing process-based watershed hydrological research using near-surface geophysics: A vision for, and review of, electrical and magnetic geophysical methods. Hydrol. Process. Int. J. 22(18), 3604–3635 (2008) (ISSN: 0885-6087.). Article ADS Google Scholar Beff, L. et al. Three-dimensional monitoring of soil water content in a maize field using Electrical Resistivity Tomography.…
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Propagation of THz radiation in air over a broad range of atmospheric temperature and humidity conditions
Koch, M. Terahertz communications: A 2020 vision. In Terahertz Frequency Detection and Identification of Materials and Objects (eds Miles, R. E. et al.) 325–338 (Springer, UK, 2007). Chapter Google Scholar Federici, J. & Moeller, L. Review of terahertz and Subterahertz wireless communications. J. Appl. Phys. 107, 111101. https://doi.org/10.1063/1.3386413 (2010). Article ADS CAS Google Scholar Jornet,…
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Exploiting nonlinearities through geometric engineering to enhance the auxetic behaviour in re-entrant honeycomb metamaterials
In this section, the effective elastic properties of the 2D and 3D re-entrant type geometries are presented as a function of applied loads. As emphasised in “Numerical methodology”, the members constituting the auxetic microstructure are assumed to be thin strips and circular tubes. This allows the investigation of the influence of non-classical non-linearities. Simulations also…