Results 41 to 50 of about 5,719 (203)
Spatiotemporal Computational Meta‐Imager for Broadband Dual‐Layer Optical Convolution
Advanced Science, EarlyView.A single‐layer polarization‐multiplexed meta‐imager achieves factorized dual‐layer broadband convolution via spatiotemporal kernel decomposition. Fixed Bessel‐vortex bases and time‐sequential liquid‐crystal modulation deliver tunable signed weights and in‐situ fabrication‐error compensation. Experiments verify improved classification performance across
Mengguang Wang +6 more
wiley +1 more source
Couple on a rotating permeable sphere in a couple stress fluid
Ain Shams Engineering Journal, 2018 In this paper, the flow generated by the slow steady rotation of a permeable sphere with thin surface about its axis of symmetry in an incompressible couple stress fluid which is otherwise at rest is studied.
P. Aparna +2 more
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Transient free convection flow past an accelerated vertical cylinder in a rotating fluid
Ain Shams Engineering Journal, 2014 The flow of a viscous incompressible fluid past an accelerated vertical circular cylinder in a rotating fluid is analyzed in this study. The cylinder starts impulsively from rest with uniform acceleration in its own plane relative to the rotating fluid ...
Rudra Kanta Deka +2 more
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Conformal Reconfigurable Intelligent Surfaces: A Cylindrical Geometry Perspective
Advanced Electronic Materials, EarlyView.Cylindrical reconfigurable intelligent surfaces are explored for low‐complexity beam steering using one‐bit meta‐atoms. A multi‐level modeling approach, including optimization‐based synthesis, demonstrates that even minimal hardware can support directive scattering.
Filippo Pepe +4 more
wiley +1 more source
On Integral Representations for the Generalised Bessel and Neumann Functions
MathematicsThe original Bessel differential equation that describes, among many others cylindrical acoustic or vortical waves, is a particular case of zero degree of the generalised Bessel differential equation that describes coupled acoustic–vortical waves.
Luiz M. B. C. Campos, Manuel J. S. Silva
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Comptes Rendus. Mathématique, 2023 In this paper, we introduce some monotonicity rules for the ratio of integrals. Furthermore, we demonstrate that the function $-T_{\nu ,\alpha ,\beta }(s)$ is completely monotonic in $s$ and absolutely monotonic in $\nu $ if and only if $\beta \ge 1 ...
Mao, Zhong-Xuan, Tian, Jing-Feng
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Recent Advances in Programmable Metasurfaces and Meta‐Devices
Advanced Electronic Materials, EarlyView.Programmable metasurfaces enable various novel functionalities by dynamically tuning electromagnetic wavefronts. This article provides a comprehensive review of recent advances in microwave and terahertz programmable metasurfaces, covering electrical, thermal, optical, and mechanical control mechanisms.
Linda Shao +4 more
wiley +1 more source
On a product of modified Bessel functions [PDF]
Proceedings of the American Mathematical Society, 2008 Summary: Let \(I_{\nu}\) and \( K_{\nu}\) denote the modified Bessel functions of the first and second kinds of order \( \nu.\) In this note we prove that the monotonicity of \( u \mapsto I_{\nu}(u)K_{\nu}(u)\) on \( (0,\infty)\) for all \( \nu\geq -1/2\) is an almost immediate consequence of the corresponding Turán type inequalities for the modified ...
openaire +2 more sources
Designing Wire Mazes for Replicating Natural Echoes to Study Bat Biosonar Function
Advanced Intelligent Systems, EarlyView.A validated framework combining efficient physical modeling (multiple scattering model) and deep learning is presented to guide wire‐maze design for bat biosonar studies. This approach rapidly generates large datasets to test acoustic distinguishability among wire arrangements.
Chunlin Jia +3 more
wiley +1 more source
On the characterization properties of certain hypergeometric functions in the open unit disk
Journal of Inequalities and Applications, 2022 Our purpose in the present investigation is to study certain geometric properties such as the close-to-convexity, convexity, and starlikeness of the hypergeometric function z 1 F 2 ( a ; b , c ; z ) $z{}_{1}F_{2}(a;b,c;z)$ in the open unit disk.
Deepak Bansal +3 more
doaj +1 more source