Category: Engineering
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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…
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Robust in-vehicle heartbeat detection using multimodal signal fusion
Cardiovascular diseases [Internet]. Genève: World Health Organization [cited 2023 Jul 9]; [about screen 1]. Available from: https://www.euro.who.int/en/health-topics/noncommunicable-diseases/cardiovascular-diseases/cardiovascular-diseases2. Wolf, P., Abbott, R. & Kannel, W. Atrial fibrillation as an independent risk factor for stroke: The Framingham study. Stroke 22(8), 983–988. https://doi.org/10.1161/01.STR.22.8.983 (1991). Article CAS PubMed Google Scholar Middlekauff, H., Stevenson, W. & Stevenson, L. Prognostic significance…
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Reparameterized multiobjective control of BCG immunotherapy
Nonlinear bladder cancer model In this study, a bladder cancer model27,28 is employed, as depicted in Fig. 1. The model considers the impact of BCG vaccines on various populations, including uninfected tumor cells, infected tumor cells, and effector T cells. The administration of BCG vaccines to the tumor site converts uninfected tumor cells into infected tumor…
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Development of a hybrid LSTM with chimp optimization algorithm for the pressure ventilator prediction
Materials The ventilator data used in this work was obtained from the Google Brain public dataset, which is publicly accessible on Kaggle42. An artificial bellows test lung was attached to a custom open-source ventilator using a respiratory circuit to create the dataset. Figure 1 shows the configuration, with the predicted state variable (airway pressure) indicated in…
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Study of noise and structural characteristics of twin-screw air compressor based on multi-physical field coupling
The acoustic-structural coupling analysis of the air compressor shell was done by multi-physical field coupling technique. When the incident frequency is 1300 Hz, the air compressor shell characteristics, such as sound pressure level, deformation, and surface acceleration distribution are analyzed respectively. In order to obtain the distribution law of sound pressure level, deformation and surface acceleration…
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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…