Results 51 to 60 of about 790 (217)
Some extensions of right N-semilocal rings
Journal of Scientific Research in ScienceIn this paper, we study the necessary and sufficient conditions for the formal triangular matrix ring, the generalized upper triangular matrix ring, the trivial Morita context, and the Morita context to be right N-semilocal, right N-semiperfect, right N ...
Samah H. El-Bishlawy +2 more
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An inverse matrix of an upper triangular matrix can be lower triangular
Discussiones Mathematicae - General Algebra and Applications, 2002 The definitions of two groups of matrices are discussed. One group consists of \(n\times n\) upper triangular matrices and is usually defined over a commutative ring. The second group is the full general linear group defined over any associative ring.
openaire +2 more sources
Influence of Test Temperature and Test Frequency on Fatigue Life of Aluminum Alloy EN AW‐2618A
Advanced Engineering Materials, EarlyView.The influence of test temperature and test frequency on the fatigue life of EN AW‐2618A is investigated. High‐cycle fatigue tests are performed at different test temperatures and frequencies on the 1000 h/230°C overaged state. Both test parameters reduce fatigue life due to time‐dependent damage mechanisms.
Ying Han +5 more
wiley +1 more source
Optimization of the Production of Rubber Compounds Using Mathematical Models
Advanced Engineering Materials, EarlyView.Rubber compounds were mixed in a batch internal mixer, and symbolic regression was used to derive mathematical models linking recipe and process parameters to ram path, torque, and mixing quality (incorporation, dispersion, distribution). Subsequent optimization with evolutionary algorithms identified operating conditions that reduce specific energy ...
Anke Bardehle +7 more
wiley +1 more source
On Nash Equilibrium Strategy of Two-person Zero-sum Games with Trapezoidal Fuzzy Payoffs
Fuzzy Information and Engineering, 2014 In this paper, we investigate Nash equilibrium strategy of two-person zero-sum games with fuzzy payoffs. Based on fuzzy max order, Maeda and Cunlin constructed several models in symmetric triangular and asymmetric triangular fuzzy environment ...
Bapi Dutta, S.K. Gupta
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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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τ-tilting finite triangular matrix algebras
Journal of Pure and Applied Algebra, 2021 11 pages, major changes: Theorem 3.1(1) and the proof of Theorem 2.1, a new important example: Example 3 ...
Aihara, Takuma, Honma, Takahiro
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Nondestructive Testing of Welded Composite Metal Foams
Advanced Engineering Materials, EarlyView.X‐ray computed tomography (CT) is used to evaluate welded steel–steel composite metal foam (CMF) joints of two density classes. It reports variation in postweld spatial void distribution and correlates it to weld‐induced changes, mechanical performance, and failure within welded CMF panels.
Chinmaya Prerana Inguva +2 more
wiley +1 more source
Triangular matrix representations of ring extensions
Journal of Algebra, 2003 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Birkenmeier, Gary F., Park, Jae Keol
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Advanced Engineering Materials, EarlyView.This work shows that the mechanical performance of multimaterial digital light processing (DLP) printed thermoset composites is governed by resin compatibility and interfacial design rather than spatial patterning alone. Brittle and ductile resin combinations produced premature interfacial failure, while graded interfaces and mechanically compatible ...
Ahmed M. H. Ibrahim +3 more
wiley +1 more source