Results 41 to 50 of about 251,319 (312)
On the Performance of Spectrum Sensing Algorithms using Multiple Antennas [PDF]
, 2010 In recent years, some spectrum sensing algorithms using multiple antennas, such as the eigenvalue based detection (EBD), have attracted a lot of attention.
Liang, Ying-Chang +2 more
core +2 more sources
Signal Bandwidth Impact on Maximum-Minimum Eigenvalue Detection
IEEE Communications Letters, 2015 The impact of the signal bandwidth and observation bandwidth on the detection performance of the maximum-minimum eigenvalue detector is studied in this letter. The considered signals are the Gaussian signals. The optimum ratio between the signal and the observation bandwidth is analytically proven to be 0.5 when reasonable values of the system ...
Hamid, Mohamed +2 more
openaire +2 more sources
Analytical results for entanglement in the five-qubit anisotropic Heisenberg model
, 2004 We solve the eigenvalue problem of the five-qubit anisotropic Heisenberg model, without use of Bethe's Ansatz, and give analytical results for entanglement and mixedness of two nearest-neighbor qubits.
Arnesen +43 more
core +1 more source
International Journal of Adaptive Control and Signal Processing, EarlyView.This paper proposes two projector‐based Hopfield neural network (HNN) estimators for online, constrained parameter estimation under time‐varying data, additive disturbances, and slowly drifting physical parameters. The first is a constraint‐aware HNN that enforces linear equalities and inequalities (via slack neurons) and continuously tracks the ...
Miguel Pedro Silva
wiley +1 more source
Strongly Regular Graphs as Laplacian Extremal Graphs [PDF]
, 2014 The Laplacian spread of a graph is the difference between the largest eigenvalue and the second-smallest eigenvalue of the Laplacian matrix of the graph.
Lin, Fan-Hsuan, Weng, Chih-wen
core
Fabrication‐Directed Entanglement for Designing Chiral and Anisotropic Metamaterial Foams
Advanced Engineering Materials, EarlyView.This work introduces fabrication‐directed entanglement (FDE), combining viscous thread printing and topology optimization to program entangled foams with spatially patterned stiffness. By tuning coil density, FDE enables anisotropy, programmable Poisson's ratio, and chirality in foams.
Daniel Revier +3 more
wiley +1 more source
Inequalities for the minimum eigenvalue of M-matrices
The Electronic Journal of Linear Algebra, 2010 Let A be a nonsingular M-matrix, and τ(A) denote its minimum eigenvalue. Shivakumar et al. [SIAM J. Matrix Anal. Appl., 17(2):298-312, 1996] presented some bounds of τ(A) when A is a weakly chained diagonally dominant M-matrix. The present paper establishes some new bounds of τ(A) for a general nonsingular M-matrix A.
Gui-Xian Tian, Ting-Zhu Huang
openaire +1 more source
The domination number and the least $Q$-eigenvalue [PDF]
, 2013 A vertex set $D$ of a graph $G$ is said to be a dominating set if every vertex of $V(G)\setminus D$ is adjacent to at least a vertex in $D$, and the domination number $\gamma(G)$ ($\gamma$, for short) is the minimum cardinality of all dominating sets of $
Guo, Shu-Guang +3 more
core
Advanced Engineering Materials, EarlyView.This article presents a solver‐agnostic domain‐specific language (DSL) for computational structural mechanics that strengthens interoperability in virtual product development. Using a hierarchical data model, the DSL enables seamless exchange between diverse simulation tools and numerical methods.
Martin Rädel +3 more
wiley +1 more source
Machine Learning Methods for Inferring the Number of UAV Emitters via Massive MIMO Receive Array
Drones, 2023 To provide important prior knowledge for the direction of arrival (DOA) estimation of UAV emitters in future wireless networks, we present a complete DOA preprocessing system for inferring the number of emitters via a massive multiple-input multiple ...
Yifan Li +8 more
doaj +1 more source