Results 61 to 70 of about 23,280,557 (293)

On periodic orbits in discrete-time cascade systems

open access: yesDiscrete Dynamics in Nature and Society, 2006
We present some results on existence, minimum period, number of periodic orbits, and stability of periodic orbits in discrete-time cascade systems. Some examples are presented to illustrate these results.
Huimin Li, Xiao-Song Yang
doaj   +1 more source

A new flow chip in combination with multiphoton microscopy as a protocol for longitudinal 3D imaging of tissue calcification under shear stress

open access: yesFEBS Open Bio, EarlyView.
Miniaturized flow chip platform enabling continuous perfusion and longitudinal multiphoton 3D imaging of vascular smooth muscle cell constructs under physiological flow. Brightfield imaging guides region selection, while CellTracker Green and mRuby‐labeled fetuin‐A visualize cells and mineral deposition, respectively. Magnesium supplementation markedly
Vytautas Kučikas   +6 more
wiley   +1 more source

Generalized observer forms for discrete-time nonlinear systems [PDF]

open access: yesProceedings of the Estonian Academy of Sciences
The paper addresses the problem of transforming single-output discrete-time state equations into the generalized observer form, which comprises a linear observable component and a nonlinear injection term, depending on the inputs, output, and a finite ...
Arvo Kaldmäe   +5 more
doaj   +1 more source

Evolution‐guided yeast complementation reveals functional differences in human PSPH variants

open access: yesFEBS Open Bio, EarlyView.
Ancient genomes can help guide which human genetic variants are tested experimentally. This study applies that idea to PSPH, a gene involved in serine biosynthesis, and uses high‐throughput yeast complementation to compare variant function. The findings reveal measurable differences among selected alleles and illustrate the value of evolution‐guided ...
Mauricio Campa‐Álvarez   +6 more
wiley   +1 more source

The Use of Language Projection for Compositional Verification of Discrete Event Systems [PDF]

open access: yes, 2008
This paper proposes the use of abstraction by language projection to improve the performance of compositional verification to prove or disprove that a large system of composed finite-state machines satisfies a given safety property.
Simon Ware   +3 more
core   +1 more source

Decentralized Discrete-Time Formation Control for Multirobot Systems

open access: yesDiscrete Dynamics in Nature and Society, 2013
Inspired from the collective behavior of biological entities for the group motion coordination, this paper analyzes the formation control of mobile robots in discrete time where each robot can sense only the position of certain team members and the group
E. G. Hernandez-Martinez   +2 more
doaj   +1 more source

An improved stability criterion for discrete-time time-delayed Lur'e system with sector-bounded nonlinearities

open access: yesAutomatika, 2022
The absolute stability problem of discrete-time time-delayed Lur'e systems with sector bounded nonlinearities is investigated in this paper. Firstly, a modified Lyapunov-Krasovskii functional (LKF) is designed with augmenting additional double summation ...
Lijuan Zhu, Chengyun Zhu
doaj   +1 more source

Structural studies and functional engineering of NanX: an anhydro‐sialic acid transporter from Escherichia coli

open access: yesFEBS Open Bio, EarlyView.
Biophysical characterisation shows that NanX, a membrane transport protein from the major facilitator superfamily (MFS), forms both monomers and dimers after purification. AlphaFold modelling and substrate docking provide information on residues likely involved in substrate recognition for NanX and another MFS member, NanT.
Michael C. Newton‐Vesty   +13 more
wiley   +1 more source

A new framework for consensus for discrete-time directed networks of multi-agents with distributed delays [PDF]

open access: yes, 2012
Copyright @ 2012 Taylor & FrancisIn this article, the distributed consensus problem is considered for discrete-time delayed networks of dynamic agents with fixed topologies, where the networks under investigation are directed and the time-delays involved
Wang, Z, Ho, DWC
core   +1 more source

H∞ Control for Linear Positive Discrete-Time Systems

open access: yesJournal of Applied Mathematics, 2013
This paper is concerned with H∞ control for linear positive discrete-time systems. Positive systems are characterized by nonnegative restriction on systems’ variables.
Youmei Zhang   +2 more
doaj   +1 more source

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