Results 91 to 100 of about 137,800 (236)
Multiplex Cellular Microenvironment Detection Based on Surface‐Enhanced Raman Scattering Patch
Chemistry–Methods, EarlyView.A multiplex patch is proposed based on surface‐enhanced Raman scattering (SERS) measurement and multivariate curve resolution (MCR) analysis. The gold nanorods (AuNRs) assembly modified on the polydimethylsiloxane (PDMS) film provides the patch with high sensitivity of SERS detection, and the MCR decomposition realizes the quantification of H2O2 and pH
Xiaoyu Wu +7 more
wiley +1 more source
Spectra universally realizable by doubly stochastic matrices
Special Matrices, 2018 A list of complex numbers Λ = { λ1, . . . , λn} is said to be realizable if it is the spectrum of an entrywise nonnegative matrix, and universally realizable if there exists a nonnegative matrix with spectrum Λ for each Jordan canonical form associated ...
Collao Macarena +2 more
doaj +1 more source
Bounds for the spectral radius of nonnegative matrices and generalized Fibonacci matrices
Special Matrices, 2022 In this article, we determine upper and lower bounds for the spectral radius of nonnegative matrices. Introducing the notion of average 4-row sum of a nonnegative matrix, we extend various existing formulas for spectral radius bounds.
Adam Maria, Aretaki Aikaterini
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Communications on Pure and Applied Mathematics, EarlyView.Abstract Let (Mn,g)$(M^n,g)$ be a complete Riemannian manifold which is not isometric to Rn$\mathbb {R}^n$, has nonnegative Ricci curvature, Euclidean volume growth, and quadratic Riemann curvature decay. We prove that there exists a set G⊂(0,∞)$\mathcal {G}\subset (0,\infty)$ with density 1 at infinity such that for every V∈G$V\in \mathcal {G}$ there ...
Gioacchino Antonelli +2 more
wiley +1 more source
Distance Matrix of a Class of Completely Positive Graphs: Determinant and Inverse
Special Matrices, 2020 A real symmetric matrix A is said to be completely positive if it can be written as BBt for some (not necessarily square) nonnegative matrix B. A simple graph G is called a completely positive graph if every matrix realization of G that is both ...
Das Joyentanuj +2 more
doaj +1 more source
Communications on Pure and Applied Mathematics, EarlyView.Abstract We analyse and clarify the finite‐size scaling of the weakly‐coupled hierarchical n$n$‐component |φ|4$|\varphi |^4$ model for all integers n≥1$n \ge 1$ in all dimensions d≥4$d\ge 4$, for both free and periodic boundary conditions. For d>4$d>4$, we prove that for a volume of size Rd$R^{d}$ with periodic boundary conditions the infinite‐volume ...
Emmanuel Michta +2 more
wiley +1 more source
Monotonicity of the number of positive entries in nonnegative matrix powers
Journal of Inequalities and Applications, 2018 Let A be a nonnegative matrix of order n and f(A) $f(A)$ denote the number of positive entries in A. We prove that if f(A)≤3 $f(A)\leq3$ or f(A)≥n2−2n+2 $f(A)\geq n^{2}-2n+2$, then the sequence {f(Ak)}k=1∞ $\{f(A^{k})\}_{k=1}^{\infty}$ is monotonic for ...
Qimiao Xie
doaj +1 more source
The spectral norm of a nonnegative matrix
Linear Algebra and its Applications, 1990 AbstractGiven a matrix A=[aij], define ‖A‖=[‖aij‖]. Let ⦀ · ⦀2 denote the spectral norm. We show that for any matrix A ⦀‖A‖⦀2=min{r1(B)c1(C):B∘C=A} and show that under mild conditions the minimizers in (1) are essentially unique and are related to the left and right singular vectors of A in a simple way.
openaire +2 more sources
Review of artificial intelligence applications in geothermal energy extraction from hot dry rock
Deep Underground Science and Engineering, EarlyView.This paper systematically summarized the applications of artificial intelligence (AI) in hot dry rock (HDR) geothermal exploitation and discussed the limitations and opportunities. A novel intelligent HDR exploitation system was proposed to promote the development of HDR toward more efficiency, economy, and intelligence.
Kun Ji +5 more
wiley +1 more source
Systemic Credit Risk Premium: Insights From Credit Derivatives Markets
Journal of Futures Markets, EarlyView.ABSTRACT This study examines the market‐implied premiums for bearing systemic credit risk by analyzing credit derivatives on the CDX North American Investment Grade portfolio from September 2005 to March 2021. We construct systemic credit risk premium (SCRP) as the difference between the observed prices of multiname super‐senior tranches and their ...
Kiwoong Byun, Baeho Kim, Dong Hwan Oh
wiley +1 more source