Results 21 to 30 of about 6,788 (257)
IEEE Open Journal of Antennas and Propagation, 2023 An accurate and fast prediction technique is necessary for the radiation pattern of the reconfigurable intelligent surface (RIS) to quantitatively and efficiently evaluate the performance of RIS.
Xin Du, Chechia Kang, Jun-Ichi Takada
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Development of an Elevation–Fresnel Linked Mini-Heliostat Array
Energies, 2020 Heliostats are critical components of solar tower technology and different strategies have been proposed to reduce their costs; among them diminishing their size to reduce wind loads or linking nearby heliostats mechanically, to reduce the overall number
Isaías Moreno-Cruz +6 more
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International Journal of Antennas and Propagation, 2008 This paper presented a theoretical and numerical assessment for nonidentical segmented exponential- (NISE-) convex and NISE-concave serrated plane CATRs by changing number of serrations.
T. Venkata Rama Krishna +2 more
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Photon filamentation in resonant media with high Fresnel numbers [PDF]
Optics and Spectroscopy, 2001 The phenomenon of turbulent photon filamentation occurs in lasers and other active optical media at high Fresnel numbers. A description of this phenomenon is suggested. The solutions to evolution equations are presented in the form of a bunch of filaments chaotically distributed in space and having different radii.
openaire +2 more sources
Optical performance assessment of a small experimental prototype of linear Fresnel reflector
Case Studies in Thermal Engineering, 2019 This paper aims to examine the optical behavior of a small experimental setup for linear Fresnel reflector. The setup was built and tested as a water heater at University of Blida located in Algeria.
Zafar Said +3 more
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Compact Camera Fluorescence Detector for Parallel-Light Lens-Based Real-Time PCR System
Sensors, 2022 The polymerase chain reaction is an important technique in biological research. However, it is time consuming and has a number of disadvantages. Therefore, real-time PCR technology that can be used in real-time monitoring has emerged, and many studies ...
Seul-Bit-Na Koo +3 more
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Optical Tests on a Curve Fresnel Lens as Secondary Optics for Solar Troughs
International Journal of Photoenergy, 2017 A curve Fresnel lens is developed as secondary concentrator for solar parabolic troughs to reduce the number of photovoltaic cells. Specific measurements and optical tests are used to evaluate the optical features of manufactured samples. The cylindrical
D. Fontani +5 more
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The Fresnel Approximation and Diffraction of Focused Waves
PhotonicsIn this paper, diffraction of scalar waves by a screen with a circular aperture is explored, considering the incidence of either a collimated beam or a focused wave, a historical review of the development of the theory is presented, and the introduction ...
Colin J. R. Sheppard
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EPJ Web of Conferences, 2018 We present a reliable image reconstruction algorithm suitable for a microwave holographic vision system with several sensors coupled to the spin-diode based microwave detector and a single emission source.
Leshchiner Dmitry +4 more
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IEEE Access, 2023 This paper aims to present a robust algorithm developed that aims to minimize the number of sensor nodes in a WSN using three quantum-behaved swarm optimization techniques based on Lorentz (QPSO-LR), Rosen–Morse (QPSO-RM), and Coulomb-like Square ...
Washington Velasquez +2 more
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