Results 41 to 50 of about 85,399 (116)

Design Guidelines of Stacked Dual-Band SIW Slot Array With Optimal Aperture Reuse Ratio and High Aperture Efficiency

IEEE Open Journal of Antennas and Propagation
With the advent of Internet of Things (IoT) technology, intelligent devices have greatly enhanced people’s daily lives by providing greater convenience, efficiency, and connectivity.
Yihong Su, Yulei Yang, Xian Qi Lin, Yong Fan   +3 more
doaj   +1 more source

Exploring Wavefront Detection in Imaging Systems with Rectangular Apertures Using Phase Diversity

Sensors
The attainment of a substantial aperture in the rotating synthetic aperture imaging system involves the rotation of a slender rectangular primary mirror. This constitutes a pivotal avenue of exploration in space telescope research.
Yibo Li, Jiang Guo, Rengcong Liu
doaj   +1 more source

Quadrupole shapes

Physical Review Special Topics. Accelerators and Beams, 2012
The usual practice of constructing quadrupoles from truncated cylindrical hyperbolae is put into question. A new shape is proposed. This shape has an analytic potential function.
R. Baartman
doaj   +1 more source

DESIGN OF MULTILAYER APERTURE COUPLED STACKED MICROSTRIP PATCH ANTENNA FOR WLAN APPLICATIONS [PDF]

ICTACT Journal on Communication Technology, 2015
One of the major drawbacks of microstrip patch antenna is its narrow bandwidth. The solution of this problem is to use aperture coupled stacked micro strip patch antenna.
P. Jothilakshmi, J. Bharanitharan, V. Ramkumar   +2 more
doaj  

The Impact of Nonlinear Flow Regime on the Flow Rate in Fractal Fractures

Fluids
Geometric properties of fractures, such as aperture and width, among others, significantly affect the fluid flow behaviors in fractured media. Previous studies have shown that fractures exhibit fractal properties.
Jianting Zhu
doaj   +1 more source

Dual-Reflector Optimization in Parabolic Trough Collectors: A Coupled Optical–CFD Approach for Enhanced Thermal Efficiency [PDF]

Journal of Renewable Energy and Environment
This paper presents a novel investigation into the influence of reflector dimensions, specifically aperture and depth, on the efficiency of parabolic trough collectors enhanced by a secondary reflector.
Tameur Zaitri, Belkacem Bouali, Nadhir Abdelaziz   +2 more
doaj   +1 more source

A permeability model for the fractal tree-like fracture network with self-affine surface roughness in shale gas reservoirs

Geomechanics and Geophysics for Geo-Energy and Geo-Resources
The complex natural fracture network with self-affine rough surface and branching characteristics significantly impacts the gas transport in shale gas reservoirs. However, its effects on the permeability have not been studied so far.
Bowen Hu, J. G. Wang, Rui Sun, Zhiye Zhao   +3 more
doaj   +1 more source

Tracking Characteristics of a Triangular-Aperture Mounted Optical Head Slider to Which a Polarized Violet Laser Source Is Applied

Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2010
In near-field optical recording, the combination of a triangular aperture and a polarized illuminating light is thought to be one of the most promising breakthroughs for improving both spatial resolution and signal-to-noise ratio.
Toshifumi OHKUBO, Majung PARK, Masakazu HIRATA, Manabu OUMI, Kunio NAKAJIMA   +4 more
doaj   +1 more source

Design of aperture radar auxiliary technology based on array mathematical model and statistical characteristic calculation

Discover Applied Sciences
In response to the problem of poor imaging quality caused by amplitude and phase errors in synthetic aperture imaging, this study develops an aperture radar-assisted technology based on an array of mathematical models and statistical characteristic ...
Ji Yang, Ying Fan, Shuqing Yang
doaj   +1 more source

Aperture Ratio Improvement by Optimizing the Voltage Slope and Reverse Pulse in the Driving Waveform for Electrowetting Displays. [PDF]

Micromachines (Basel), 2019
Yi Z, Feng W, Wang L, Liu L, Lin Y, He W, Shui L, Zhang C, Zhang Z, Zhou G.   +9 more
europepmc   +1 more source