Results 41 to 50 of about 445,081 (268)
Liquid‐Crystal‐Based Reconfigurable Intelligent Surface for 7 GHz Mobile Communication
Advanced Materials Technologies, EarlyView.The glass‐based liquid‐crystal reconfigurable intelligent surface (LC‐RIS) integrates active‐matrix driving and blind‐greedy phase optimization within a 5G‐NR OFDM framework. This enables continuously tunable and autonomous enhancement of wireless coverage. Leveraging the transparency and manufacturability of liquid crystal panels, it is ideally suited
Tien‐Lun Ting +5 more
wiley +1 more source
Efficient Adsorption‐Based Direct Air Capture Via Triply Periodic Minimal Surface Architectures
Advanced Science, EarlyView.Architected triply periodic minimal surface (TPMS) contactors reshape direct air capture by replacing straight‐channel diffusion limits with convection‐enhanced CO2 transport. Chaotic advection thins boundary layers and exposes fast adsorption sites, enabling 70%–75% more fast sites, 114% higher productivity, and 51.8% lower energy consumption than ...
Qingyang Shao +6 more
wiley +1 more source
Approximation of integral operators by Green quadrature and nested cross approximation [PDF]
Numerische Mathematik, 2015 We present a fast algorithm that constructs a data-sparse approximation of matrices arising in the context of integral equation methods for elliptic partial differential equations. The new algorithm uses Green's representation formula in combination with quadrature to obtain a first approximation of the kernel function and then applies nested cross ...
Steffen Börm, Sven Christophersen
openaire +3 more sources
Analysis of stochastic Lanczos quadrature for spectrum approximation
CoRR, 2021 The cumulative empirical spectral measure (CESM) $Φ[\mathbf{A}] : \mathbb{R} \to [0,1]$ of a $n\times n$ symmetric matrix $\mathbf{A}$ is defined as the fraction of eigenvalues of $\mathbf{A}$ less than a given threshold, i.e., $Φ[\mathbf{A}](x) := \sum_{i=1}^{n} \frac{1}{n} {\large\unicode{x1D7D9}}[ λ_i[\mathbf{A}]\leq x]$.
Tyler Chen +2 more
openaire +4 more sources
Gaussian process quadratures in nonlinear sigma-point filtering and smoothing [PDF]
, 2014 This paper is concerned with the use of Gaussian process regression based quadrature rules in the context of sigma-point-based nonlinear Kalman filtering and smoothing.
Svensson, Lennart +5 more
core
Sur les quadratures mécaniques
, 1901 Seares Frederick Hanley. Sur les quadratures mécaniques. In: Bulletin astronomique, tome 18, 1901. pp.
Seares, Frederick Hanley
core +1 more source
Advanced Science, EarlyView.A self‐powered phase‐encoding sensing paradigm enables direct motion‐to‐time information conversion, providing a compact and autonomous strategy for high resolution angular displacement measurement. ABSTRACT In modern manufacturing and engineering, angular displacement sensors are crucial for motion control and feedback systems in Electromechanical ...
Shuxian Wang +3 more
wiley +1 more source
H^(-1) Galerkin-collocation method with quadratures for two point boundary value problems [PDF]
, 1989 .In the paper, the H^(-1)Galerkin-collocation method with quadratures (instead of integrals) for two point boundary value problems is considered. Approximate solution is a piecewise polynomial of degree r.
Leyk, Zbigniew
core +1 more source
Advanced Science, EarlyView.The concept of high‐dimensional EM modulation using the STMA for physical layer secure communication is illustrated in figure. The STMA consists of a series of programmable unit cells, with 1‐bit reconfigurable phase states (0/π). The STMA is excited by a monochromatic continuous wave (CW) at frequency fc and controlled by a field‐programmable gate ...
Xinyu Fang +6 more
wiley +1 more source
Numerical approximation of one phase quadrature domains [PDF]
Numerical Methods for Partial Differential Equations, 2013 AbstractIn this work, we present two numerical schemes for a free boundary problem that is called one phase quadrature domain. In the first method, using the properties of a given free boundary problem, we derive a method that leads us to a fast iterative solver. The iteration procedure is adapted to work in the case when topology changes.
Bazarganzadeh, Mahmoudreza +1 more
openaire +4 more sources