Results 51 to 60 of about 2,415 (165)

Optimization Method for Decoupled Dual‐Platform Parallel Mechanism Integrating Radial Basis Function Neural Networks and Multobjective Particle Swarm Optimization

Journal of Robotics, Volume 2025, Issue 1, 2025.
With growing demands for machining large‐scale complex components in aerospace and marine engineering, conventional processing methods face bottlenecks, including insufficient rigidity, error accumulation, and limited flexibility. Parallel mechanisms (PMs), with their high stiffness and dynamic pose reconfiguration capability, provide critical ...
Yang Qi, Hong Wang, Jinhan Yang, Sreeja Dattachoudhury   +3 more
wiley   +1 more source

Stability for Inference with Persistent Homology Rank Functions

Computer Graphics Forum, Volume 43, Issue 5, August 2024.
Abstract Persistent homology barcodes and diagrams are a cornerstone of topological data analysis that capture the “shape” of a wide range of complex data structures, such as point clouds, networks, and functions. However, their use in statistical settings is challenging due to their complex geometric structure. In this paper, we revisit the persistent
Qiquan Wang, Inés García‐Redondo, Pierre Faugère, Gregory Henselman‐Petrusek, Anthea Monod   +4 more
wiley   +1 more source

Investigating apparent differences between standard DKI and axisymmetric DKI and its consequences for biophysical parameter estimates

Magnetic Resonance in Medicine, Volume 92, Issue 1, Page 69-81, July 2024.
Abstract Purpose The purpose of the study is to identify differences between axisymmetric diffusion kurtosis imaging (DKI) and standard DKI, their consequences for biophysical parameter estimates, and the protocol choice influence on parameter estimation. Methods Noise‐free and noisy, synthetic diffusion MRI human brain data is simulated using standard
Jan Malte Oeschger, Karsten Tabelow, Siawoosh Mohammadi   +2 more
wiley   +1 more source

Quasi-exactly solvable quartic: real algebraic spectral locus

, 2011
We describe the real quasi-exactly solvable spectral locus of the PT-symmetric quartic using the Nevanlinna parametrization.Comment: 17 pages, 11 ...
Alexandersson P, Alexandre Eremenko, Andrei Gabrielov, Bender C, Eremenko A, Eremenko A, Eremenko A, Shin K C, Sibuya Y, Volkovyski L   +9 more
core   +4 more sources

Perturbation theory of multiparameter eigenvalue problems

Journal of Mathematical Analysis and Applications, 1988
Let \(T_ r\) and \(V_{rs}\) be linear selfadjoint operators in Hilbert spaces \({\mathfrak H}_ r\). Let \(\lambda_ s\) be complex parameters. Then it is considered the multiparameter system \[ (T_ r+\sum^{k}_{s=1}\lambda_ sV_{rs})u_ r=0,\quad r=1,...,k. \] The main objective is to study the influence of perturbations for the operators \(T_ r\).
openaire   +2 more sources

Potentially Toxic Elements (PTEs) Distribution in Drainage Canal Sediments of a Low‐Lying Coastal Area

Earth and Space Science, Volume 11, Issue 7, July 2024.
Abstract This study examines the accumulation, distribution, and mobility of Potentially Toxic Elements (PTEs) in the sediments of a low‐lying coastal drainage network (Ravenna, Italy). The aim is to understand the geochemical processes occurring between drainage water and canal bed sediments and assess factors affecting and driving PTE distribution ...
B. M. S. Giambastiani, N. Greggio, G. Carloni, M. Molducci, M. Antonellini   +4 more
wiley   +1 more source

Interval analysis of the small‐signal stability of grid‐connected voltage‐source converter system considering multiparameter uncertainty

IET Energy Systems Integration, Volume 6, Issue 2, Page 144-161, June 2024.
Abstract Grid‐connected voltage source converters (VSCs) have been broadly applied in modern power system. However, instability issues may be triggered by the integration of grid‐connected VSCs, jeopardising the operation of the power grid. Conventional stability analysis methods can be utilised to derive system stability margins under nominal ...
Fuxin Ouyang, Zhenguo Shao, Changxu Jiang, Yan Zhang, Feixiong Chen   +4 more
wiley   +1 more source

Non-degenerate umbilics, the path formulation and gradient bifurcation problems [PDF]

, 2004
Parametrised contact-equivalence is successful for the understanding and classification of the qualitative local behaviour of bifurcation diagrams and their perturbations. Path formulation is an alternative point of view.
Furter, JE, Sitta, AM
core  

Adaptive Detection of Instabilities: An Experimental Feasibility Study

, 2002
We present an example of the practical implementation of a protocol for experimental bifurcation detection based on on-line identification and feedback control ideas.
Anderson, Doedel, Eaton, G Flätgen, I.G Kevrekidis, J.S Anderson, K Krischer, Kim, Makeev, Omberg, R Rico-Martı́nez, Rössler, Theodoropoulos, Wang, Wiesenfeld, Wiesenfeld, Ziegler   +16 more
core   +1 more source

Around multivariate Schmidt-Spitzer theorem

, 2013
Given an arbitrary complex-valued infinite matrix A and a positive integer n we introduce a naturally associated polynomial basis B_A of C[x0...xn]. We discuss some properties of the locus of common zeros of all polynomials in B_A having a given degree m;
Alexandersson, Per, Shapiro, Boris
core   +1 more source