Results 71 to 80 of about 35,727 (292)
Globally analytic triangularization of a matrix function
Linear Algebra and its Applications, 1992 AbstractA well-known fundamental theorem of Schur guarantees that every constant matrix A is unitarily similar to a triangular matrix. If A(t) is a matrix-valued function analytic on [a, b] with real eigenvalues, it is shown in this paper via a constructive algorithm that there exists a unitary matrix U(t) analytic on [a, b] such that U∗(t)A(t)U(t) is ...
Harry Gingold, Po-Fang Hsieh
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Advanced Engineering Materials, EarlyView.High‐performance nickel‐based superalloys are often not processible in additive manufacturing (AM) due to hot cracking. The findings in this manuscript propose an efficient method to mitigate cracking and enhance mechanical properties of these alloys by producing a metal matrix composite, contributing to the material and process perspective of the AM ...
Klaus Büßenschütt +3 more
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Observability analysis and bad date processing of state estimation using Hachtel's augmented matrix method [PDF]
Modeling, Identification and Control, 1988 The triangular-factorization-based observability analysis and the normalized residual-based bad data processing are extended to state estimation using Hachtel's augmented matrix method.
Felix F. Wu +4 more
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On the Segre characteristic of a block triangular matrix
Linear Algebra and its Applications, 1999 AbstractConsider two complex matrices A and B of sizes n×n and m×m respectively, and let λ be an eigenvalue of both matrices. If α=(n1,n2) and β=(m1,m2) are the Segre characteristics associated with λ of A and B, respectively, and γ=(r1,r2,r3,r4) is a nonincreasing sequence of nonnegative integers, then a method for determining when γ is the Segre ...
Ana M. Urbano, Rafael Cantó
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Advanced Engineering Materials, EarlyView.This work reveals the phase composition and quantitative morphology analysis of precipitation‐hardened Fe32Cu12Ni11Ti16Al29 complex‐concentrated alloy. The precipitates are shown to have a high coherency. Morphology transition between sphere, cuboidal, and elongated morphology is observed. Finally, the overaging behavior is captured using microhardness.
Rostyslav Nizinkovskyi +4 more
wiley +1 more source
Algorithms for triangular decomposition of block Hankel and Toeplitz matrices with application to factoring positive matrix polynomials [PDF]
, 1973 J. Rissanen
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Approximate Joint Matrix Triangularization
, 2016 19 ...
Colombo, Nicolo, Vlassis, Nikos
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Involutions for upper triangular matrix algebras
Advances in Applied Mathematics, 2006 AbstractIn this paper we describe completely the involutions of the first kind of the algebra UTn(F) of n×n upper triangular matrices. Every such involution can be extended uniquely to an involution on the full matrix algebra. We describe the equivalence classes of involutions on the upper triangular matrices.
DI VINCENZO, Onofrio Mario +2 more
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Structurally Colored Physically Unclonable Functions with Ultra‐Rich and Stable Encoding Capacity
Advanced Functional Materials, Volume 35, Issue 12, March 18, 2025.This study reports a design strategy for generating bright‐field resolvable physically unclonable functions with extremely rich encoding capacity coupled with outstanding thermal and chemical stability. The optical response emerges from thickness‐dependent structural color formation in ZnO features, which are fabricated by physical vapor deposition ...
Abidin Esidir +8 more
wiley +1 more source
Advanced Functional Materials, EarlyView.A materials and device design concept that comprises a self‐assembled ultra‐thin epitaxial ion‐transporting layer, an amorphous oxide overcoat oxygen‐blocking layer, and a partial filament formed during an electroforming step is proposed for low‐current multilevel resistive switching devices.
Ming Xiao +17 more
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