Results 1 to 10 of about 43,001 (116)

Geometric moment-based spectral descriptors for robust non-rigid 3D shape analysis [PDF]

open access: yesScientific Reports
Numerous 3D shape descriptors have been proposed in recent years, among which spectral descriptors have gained significant prominence. However, widely used spectral signatures, such as the Heat Kernel Signature (HKS), Scale-Invariant HKS (SIHKS), and ...
Dan Zhang   +4 more
doaj   +2 more sources

Enhancing beam structural damage detection using spectral moment values and spectral moment cumulative function models

open access: yesJournal of Low Frequency Noise, Vibration and Active Control
Evaluation and identification of structural damage play a crucial role in ensuring the safety and reliability of structures. This study explores the application of spectral moment value analysis as a robust tool to assess and detect structural damage ...
Thanh Q Nguyen   +2 more
doaj   +2 more sources

A Moment-Fitted Extended Spectral Cell Method for Structural Health Monitoring Applications

open access: yesApplied Sciences, 2023
The spectral cell method has been shown as an efficient tool for performing dynamic analyses over complex domains. Its good performance can be attributed to the combination of the spectral element method with mesh-independent geometrical descriptions and
Sergio Nicoli   +3 more
doaj   +3 more sources

On the Estrada Indices of Unicyclic Graphs with Fixed Diameters

open access: yesMathematics, 2021
The Estrada index of a graph G is defined as EE(G)=∑i=1neλi, where λ1,λ2,…,λn are the eigenvalues of the adjacency matrix of G. A unicyclic graph is a connected graph with a unique cycle.
Wenjie Ning, Kun Wang
doaj   +1 more source

Moment-based analysis of pinning synchronization in complex networks with sign inner-coupling configurations

open access: yesFrontiers in Physics, 2023
In this paper, pinning synchronization of complex networks with sign inner-coupling configurations is investigated from a moment-based analysis approach.
Yanying Yu   +3 more
doaj   +1 more source

Limiting Spectral Distribution of Large-Dimensional Sample Covariance Matrices Generated by the Periodic Autoregressive Model

open access: yesJournal of Mathematics, 2021
The explicit representation for the limiting spectral moments of sample covariance matrices generated by the periodic autoregressive model (PAR) is established.
Jin Zou, Dong Han
doaj   +1 more source

SIGNED GENERALIZED PETERSEN GRAPH AND ITS CHARACTERISTIC POLYNOMIAL [PDF]

open access: yesJournal of Algebraic Systems, 2018
Let G^s be a signed graph, where G = (V;E) is the underlying simple graph and s : E(G) to {+, -} is the sign function on E(G). In this paper, we obtain k-th signed spectral moment and k-th signed Laplacian spectral moment of Gs together with coefficients ...
E. Ghasemian, Gh. H. Fath-Tabar
doaj   +1 more source

Synthesis and Characterization of Mn(II), Co(II), Ni(II) and Cu(II) complexes with 4'-azachalcone and their adducts with 1,10-phenanthroline [PDF]

open access: yesمجلة التربية والعلم, 2006
New complexes of general formula [M(L)2C12] , [M2(L)2C14] and adducts [M(L)2(phen)Cl2] ,where L=4'-azachalcone ,phen - 1,10-phenanthrolin, M=Mn(II),Co(Il),Ni(II) and Cu(II) have been prepared.
N. H. Buttrus, R. Y. Dawod, I. A. Hassan
doaj   +1 more source

Development of Empirical Formulas for Approximate Spectral Moment Based on Rain-Flow Counting Stress-Range Distribution

open access: yes한국해양공학회지, 2021
Many studies have been performed to predict a reliable and accurate stress-range distribution and fatigue damage regarding the Gaussian wide-band stress response due to multi-peak waves and multiple dynamic loads. So far, most of the approximation models
Seockhee Jun, Jun-Bum Park
doaj   +1 more source

Theoretical and experimental studies on electronic structure and photophysical properties of biological active substituted hydroxyquinolin-2(1H)-one fluorophore

open access: yesChemical Physics Impact, 2023
In this study, the solvents effects on the photophysical characteristics of compound 1-(((4-bromophenyl)amino)(4-methoxyphenyl)methyl)-6-hydroxyquinolin-2(1H)-one (4BMHQ) was investigated using several polarity functions such as Kamlet's and Catalan's ...
N. Sunil Kumar   +3 more
doaj   +1 more source

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