Results 51 to 60 of about 473,597 (273)
Calculation method for natural frequency of rotors considering load distribution in stepped parts
Nihon Kikai Gakkai ronbunshu, 2022 To improve the product performance of turbomachinery and ensure vibration reliability, we propose a method for predicting natural frequencies that considers the decrease in the stiffness of the rotor stepped part.
Kazuyuki YAMAGUCHI +2 more
doaj +1 more source
Spectral properties of the hierarchical product of graphs [PDF]
, 2016 The hierarchical product of two graphs represents a natural way to build a larger graph out of two smaller graphs with less regular and therefore more heterogeneous structure than the Cartesian product.
Skardal, Per Sebastian, Wash, Kirsti
core +3 more sources
Advanced Functional Materials, EarlyView.From a database of 170 pentagonal 2D materials, 4 candidates exhibiting altermagnetic ordering are screened. Furthermore, the spin‐splitting and unconventional boundary states in the pentagonal 2D altermagnetic monolayer MnS2 are investigated. A MnS2‐based altermagnetic tunneling junction is designed and, through ab initio quantum transport simulations,
Jianhua Wang +8 more
wiley +1 more source
IEEE Open Journal of Power ElectronicsBack-to-Back (B2B) HVDC systems can enhance cross-regional transmission capacity and overall power system stability. However, their use in interconnecting two extremely weak grids can compromise system stability.
Hassanien Ramadan A. Mohamed +1 more
doaj +1 more source
Analysis of Eigenvalue Correction Applied to Biometrics [PDF]
, 2009 Eigenvalue estimation plays an important role in biometrics. However, if the number of samples is limited, estimates are significantly biased. In this article we analyse the influence of this bias on the error rates of PCA/LDA based verification systems, using both synthetic data with realistic parameters and real biometric data.
Hendrikse, Anne +3 more
openaire +1 more source
Transient analysis using conical shell elements [PDF]
, 1973 The use of the NASTRAN conical shell element in static, eigenvalue, and direct transient analyses is demonstrated. The results of a NASTRAN static solution of an externally pressurized ring-stiffened cylinder agree well with a theoretical discontinuity ...
Goeller, J. E. +2 more
core +1 more source
Gerschgorin's theorem for generalized eigenvalue problems in the Euclidean metric
, 2010 We present Gerschgorin-type eigenvalue inclusion sets applicable to generalized eigenvalue problems.Our sets are defined by circles in the complex plane in the standard Euclidean metric, and are easier to compute than known similar results.As one ...
Nakatsukasa, Yuji
core +1 more source
Advanced Functional Materials, EarlyView.This study examines how pore shape and manufacturing‐induced deviations affect the mechanical properties of 3D‐printed lattice materials with constant porosity. Combining µ‐CT analysis, FEM, and compression testing, the authors show that structural imperfections reduce stiffness and strength, while bulk material inhomogeneities probably enhance ...
Oliver Walker +5 more
wiley +1 more source
Classification of Converter-Driven Stability and Suitable Modeling and Analysis Methods
IEEE AccessThe significant increase of converter interfaced generation, consumption, storage, and transmission in power systems, results in the need to consider converter-driven stability in detail, as well as to study modelling and analysis methods with which such
Christina Eckel +2 more
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Mathematics, 2022 In this study, a Monte Carlo simulation (MCs)-based isogeometric stochastic Finite Element Method (FEM) is proposed for uncertainty quantification in the vibration analysis of piezoelectric materials.
Yanming Xu +4 more
doaj +1 more source