Results 11 to 20 of about 10,375 (259)

3D Sensitivity Zone Mapping in a Multi-Static, Microwave Breast Imaging Configuration [PDF]

open access: yesSensors
One of the keys to medical microwave tomography is understanding the sensitivity of transmit–receive signals to changes in the electromagnetic properties to be reconstructed.
Paul Meaney   +2 more
doaj   +2 more sources

Reduced-cost construction of Jacobian matrices for high-resolution inversions of satellite observations of atmospheric composition [PDF]

open access: yesAtmospheric Measurement Techniques, 2021
Global high-resolution observations of atmospheric composition from satellites can greatly improve our understanding of surface emissions through inverse analyses.
H. Nesser   +7 more
doaj   +1 more source

Visual Error Constraint Free Visual Servoing Using Novel Switched Part Jacobian Control

open access: yesIEEE Access, 2022
This research advances the state of the image-based visual servoing (IBVS) of robotic arms to handle very large visual errors without the camera advance/retreat problem.
Zubair Arif   +3 more
doaj   +1 more source

On the Kinematics of Robotic-assisted Minimally Invasive Surgery [PDF]

open access: yesModeling, Identification and Control, 2013
Minimally invasive surgery is characterized by the insertion of the surgical instruments into the human body through small insertion points called trocars, as opposed to open surgery which requires substantial cutting of skin and tissue to give the ...
Pål Johan From
doaj   +1 more source

Expansion of the Nodal-Adjoint Method for Simple and Efficient Computation of the 2D Tomographic Imaging Jacobian Matrix

open access: yesSensors, 2021
This paper focuses on the construction of the Jacobian matrix required in tomographic reconstruction algorithms. In microwave tomography, computing the forward solutions during the iterative reconstruction process impacts the accuracy and computational ...
Samar Hosseinzadegan   +4 more
doaj   +1 more source

Exploring and Exploiting Conditioning of Reinforcement Learning Agents

open access: yesIEEE Access, 2020
The outcome of Jacobian singular values regularization was studied for supervised learning problems. In supervised learning settings for linear and nonlinear networks, Jacobian regularization allows for faster learning.
Arip Asadulaev   +3 more
doaj   +1 more source

Design of inverse kinematics algorithms: extended Jacobian approximation of the dynamically consistent Jacobian inverse

open access: yesArchives of Control Sciences, 2015
The paper presents the approximation problem of the inverse kinematics algorithms for the redundant manipulators. We introduce the approximation of the dynamically consistent Jacobian by the extended Jacobian.
Ratajczak Joanna
doaj   +1 more source

Autoencoders for a manifold learning problem with a jacobian rank constraint

open access: yesPattern Recognition, 2023
We formulate the manifold learning problem as the problem of finding an operator that maps any point to a close neighbor that lies on a ``hidden'' $k$-dimensional manifold. We call this operator the correcting function. Under this formulation, autoencoders can be viewed as a tool to approximate the correcting function.
Rustem Takhanov   +2 more
openaire   +2 more sources

Picard-vessiot theory and the Jacobian problem

open access: yesIsrael Journal of Mathematics, 2011
There are two definitions of Picard-Vessiot extension of partial differential fields, defined respectively in [\textit{E. R. Kolchin}, Proc. Am. Math. Soc. 3, 596--603 (1952; Zbl 0047.33303)] and in [\textit{M. van der Put} and \textit{M. Singer}, Galois theory of linear differential equations. Grundlehren der Mathematischen Wissenschaften 328. Berlin:
Crespo, Teresa, Hajto, Zbigniew
openaire   +3 more sources

A new approach to the stabilization and convergence acceleration in coupled Monte Carlo–CFD calculations: The Newton method via Monte Carlo perturbation theory

open access: yesNuclear Engineering and Technology, 2017
This paper proposes the adoption of Monte Carlo perturbation theory to approximate the Jacobian matrix of coupled neutronics/thermal-hydraulics problems.
Manuele Aufiero, Massimiliano Fratoni
doaj   +1 more source

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