Results 11 to 20 of about 2,383 (165)
Convergence Rate of the Modified Landweber Method for Solving Inverse Potential Problems
Mathematics, 2020 In this paper, we present the convergence rate analysis of the modified Landweber method under logarithmic source condition for nonlinear ill-posed problems. The regularization parameter is chosen according to the discrepancy principle.
Pornsarp Pornsawad +2 more
doaj +1 more source
Microwave Near-Field Dynamical Tomography of Thorax at Pulmonary and Cardiovascular Activity
Diagnostics, 2023 The developed near-field microwave diagnostics of dynamical lung tomography provide information about variations of air and blood content depth structure in the processes of breathing and heart beating that are unattainable for other available methods ...
Konstantin P. Gaikovich +6 more
doaj +1 more source
Mathematics, 2020 This paper deals with the Tikhonov regularization for nonlinear ill-posed operator equations in Hilbert scales with oversmoothing penalties. One focus is on the application of the discrepancy principle for choosing the regularization parameter and its ...
Bernd Hofmann, Christopher Hofmann
doaj +1 more source
Open Physics, 2021 In this article, a hybrid Haar wavelet collocation method (HWCM) is proposed for the ill-posed inverse problem with unknown source control parameters. Applying numerical techniques to such problems is a challenging task due to the presence of nonlinear ...
Ahsan Muhammad +6 more
doaj +1 more source
Deep preconditioners and their application to seismic wavefield processing
Frontiers in Earth Science, 2022 Seismic data processing heavily relies on the solution of physics-driven inverse problems. In the presence of unfavourable data acquisition conditions (e.g., regular or irregular coarse sampling of sources and/or receivers), the underlying inverse ...
Matteo Ravasi
doaj +1 more source
Numerical simulation of magnetic droplet dynamics in a rotating field
Mathematical Modelling and Analysis, 2013 Dynamics and hysteresis of an elongated droplet under the action of a rotating magnetic field is considered for mathematical modelling. The shape of droplet is found by regularization of the ill-posed initial–boundary value problem for nonlinear partial ...
Andrejs Cebers, Harijs Kalis
doaj +1 more source
IEEE Access, 2020 Electrical Capacitance Tomography (ECT) is a well-established industrial process tomography technique. Image reconstruction for the ECT is a nonlinear problem, and the inverse problem is usually ill-posed and ill-conditioned. Hence, the solutions for the
Wael Deabes, Hesham H. Amin
doaj +1 more source
Recent Trends in EEG-Based Motor Imagery Signal Analysis and Recognition: A Comprehensive Review
IEEE Access, 2023 The electroencephalogram (EEG) motor imagery (MI) signals are the widespread paradigms in the brain-computer interface (BCI). Its significant applications in the gaming, robotics, and medical fields drew our attention to perform a detailed analysis ...
Neha Sharma +6 more
doaj +1 more source
Blow-up of solutions of Cauchy problem for nonlinear Schrödinger equation
Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2013 In this work we study the effect of time finiteness of the existence of Cauchy problem for nonlinear Schrödinger equation solution. Together with the ill-posed Cauchy problem we consider its neighborhood in the space of operators, representing Cauchy ...
Vsevolod Zhanovich Sakbaev
doaj +1 more source
Sensors, 2022 Cyber-physical system security presents unique challenges to conventional measurement science and technology. Anomaly detection in software-assisted physical systems, such as those employed in additive manufacturing or in DNA synthesis, is often hampered
Joseph M. Lukens +4 more
doaj +1 more source