Results 61 to 70 of about 46,345 (342)

The Hitchin-Witten Connection and Complex Quantum Chern-Simons Theory [PDF]

open access: yes, 2014
We give a direct calculation of the curvature of the Hitchin connection, in geometric quantization on a symplectic manifold, using only differential geometric techniques.
Andersen, Jørgen Ellegaard   +1 more
core  

In-domain control of a heat equation: an approach combining zero-dynamics inverse and differential flatness [PDF]

open access: yes, 2015
This paper addresses the set-point control problem of a heat equation with in-domain actuation. The proposed scheme is based on the framework of zero dynamics inverse combined with flat system control.
Zheng, Jun, Zhu, Guchuan
core   +4 more sources

AAA+ protein unfoldases—the Moirai of the proteome

open access: yesFEBS Letters, EarlyView.
AAA+ unfoldases are essential molecular motors that power protein degradation and disaggregation. This review integrates recent cryo‐electron microscopy (cryo‐EM) structures and single‐molecule biophysical data to reconcile competing models of substrate translocation.
Stavros Azinas, Marta Carroni
wiley   +1 more source

Derivative-Free Nonlinear Kalman Filtering for MIMO Dynamical Systems: Application to Multi-DOF Robotic Manipulators

open access: yesInternational Journal of Advanced Robotic Systems, 2011
The paper proposes derivative-free nonlinear Kalman Filtering for MIMO nonlinear dynamical systems. The considered nonlinear filtering scheme which is based on differential flatness theory extends the class of systems to which Kalman Filtering can be ...
Gerasimos G. Rigatos
doaj   +1 more source

Geometry and flatness of m-crane systems [PDF]

open access: yesBulletin of the Polish Academy of Sciences: Technical Sciences, 2019
We propose a class of m-crane control systems, that generalizes two- and three-dimensional crane systems. We prove that each representant of the described class is feedback equivalent to the second order chained form with drift.
M. Nowicki   +3 more
doaj   +1 more source

Modeling of Cerebral Blood Flow Autoregulation Using Mathematical Control Theory

open access: yesMathematics, 2022
A mathematical model of cerebral blood flow in the form of a dynamical system is studied. The cerebral blood flow autoregulation modeling problem is treated as a nonlinear control problem and the potential and applicability of the nonlinear control ...
Alexey Golubev   +2 more
doaj   +1 more source

The nonholonomic Riemann and Weyl tensors for flag manifolds [PDF]

open access: yes, 2005
On any manifold, any non-degenerate symmetric 2-form (metric) and any skew-symmetric (differential) form W can be reduced to a canonical form at any point, but not in any neighborhood: the respective obstructions being the Riemannian tensor and dW.
Dimitry A. Leites   +5 more
core   +1 more source

Null controllability of one-dimensional parabolic equations by the flatness approach [PDF]

open access: yes, 2015
We consider linear one-dimensional parabolic equations with space dependent coefficients that are only measurable and that may be degenerate or singular.Considering generalized Robin-Neumann boundary conditions at both extremities, we prove the null ...
Martin, Philippe   +2 more
core   +2 more sources

Epigenetic blind spots – the role of DNA methylation dynamics in stem cell‐based models of embryogenesis

open access: yesFEBS Letters, EarlyView.
Embryo‐like structures (stembryos) are an innovative tool, but they are hindered by experimental variability and limited developmental potential. DNA methylation is crucial for mammalian development, but its status in stembryo models is poorly characterized.
Sara Canil   +4 more
wiley   +1 more source

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