Results 11 to 20 of about 28,533,667 (307)

Perturbation theory of transfer function matrices [PDF]

, 2022
Zeros of rational transfer function matrices $R(\lambda)$ are the eigenvalues of associated polynomial system matrices $P(\lambda)$, under minimality conditions. In this paper we define a structured condition number for a simple eigenvalue $\lambda_0$ of
Nyman, Lauri, Noferini, V, Vanni Noferini, Lauri Nyman, María C. Quintana, Pérez, Javier, Quintana, M. C., Noferini, Vanni, Quintana, María C., Javier Pérez, Nyman, L   +10 more
core   +1 more source

Attenuated pulsatile transition to the cerebral vasculature during high‐intensity interval exercise in young healthy men

Experimental Physiology, 2023
High‐intensity interval exercise (HIIE) is recommended because it provides favourable haemodynamic stimulation, but excessive haemodynamic fluctuations may be an adverse impact on the brain. We tested whether the cerebral vasculature is protected against
Jun Sugawara, Takeshi Hashimoto, Hayato Tsukamoto, Niels H. Secher, Shigehiko Ogoh   +4 more
doaj   +1 more source

Coherent Spontaneous Hemodynamics in the Human Brain

IEEE Open Journal of Engineering in Medicine and Biology, 2023
Goal: This work investigates the presence of cerebral hemodynamics (namely Oxy (O) and Deoxy (D) hemoglobin concentrations) that are coherent with spontaneous oscillations in Arterial Blood Pressure (ABP) in 78 healthy subjects during a driving ...
Cristianne Fernandez, Tapan Das, Giles Blaney, Zachary Haga, Thomas McWilliams, Julia Mertens, Angelo Sassaroli, Sergio Fantini   +7 more
doaj   +1 more source

Computation of transfer function matrices of periodic systems [PDF]

, 2002
We present a numerical approach to evaluate the transfer function matrices of a periodic system corresponding to lifted state-space representations as constant systems.
A. Varga, Varga, Andras
core   +1 more source

Cerebral Autoregulation Assessment Using the Near Infrared Spectroscopy ‘NIRS-Only’ High Frequency Methodology in Critically Ill Patients: A Prospective Cross-Sectional Study

Cells, 2022
Impairments in cerebral autoregulation (CA) are related to poor clinical outcome. Near infrared spectroscopy (NIRS) is a non-invasive technique applied to estimate CA.
Jeanette Tas, Nick Eleveld, Melisa Borg, Kirsten D. J. Bos, Anne P. Langermans, Sander M. J. van Kuijk, Iwan C. C. van der Horst, Jan Willem J. Elting, Marcel J. H. Aries   +8 more
doaj   +1 more source

Effect of dynamic cerebral autoregulation on the association between deep medullary vein changes and cerebral small vessel disease

Frontiers in Physiology, 2023
Changes in the deep medullary vein (DMV) are reported to be associated with cerebral small vessel disease (CSVD). While the mechanisms of this association are unclear, dynamic cerebral autoregulation (dCA) has been speculated to participate in this ...
Ling He, Zhen-Ni Guo, Zhen-Ni Guo, Zhen-Ni Guo, Yang Qu, Yang Qu, Yang Qu, Run-Ting Wang, Peng Zhang, Peng Zhang, Peng Zhang, Yi Yang, Yi Yang, Yi Yang, Hang Jin, Hang Jin, Hang Jin   +16 more
doaj   +1 more source

Reliability of cerebral autoregulation using different measures of perfusion pressure in patients with subarachnoid hemorrhage

Physiological Reports, 2022
Dynamic cerebral autoregulation to spontaneous fluctuations in cerebral perfusion pressure (CPP) is often assessed by transcranial Doppler (TCD) in the time domain, yielding primarily the mean flow index (Mx), or in the frequency domain using transfer ...
Markus Harboe Olsen, Tenna Capion, Christian Gunge Riberholt, Søren Bache, Ronan M. G. Berg, Kirsten Møller   +5 more
doaj   +1 more source

The Impact of Serial Remote Ischemic Conditioning on Dynamic Cerebral Autoregulation and Brain Injury Related Biomarkers

Frontiers in Physiology, 2022
ObjectiveRecent studies have demonstrated the positive roles of remote ischemic conditioning (RIC) in patients with cerebrovascular diseases; however, the mechanisms remain unclear. This study aimed to explore the effect of serial RIC on dynamic cerebral
Yang Qu, Yang Qu, Yang Qu, Peng Zhang, Peng Zhang, Peng Zhang, Qian-Yan He, Qian-Yan He, Qian-Yan He, Ying-Ying Sun, Ying-Ying Sun, Ying-Ying Sun, Mei-Qi Wang, Mei-Qi Wang, Mei-Qi Wang, Jia Liu, Pan-Deng Zhang, Yi Yang, Yi Yang, Yi Yang, Zhen-Ni Guo, Zhen-Ni Guo, Zhen-Ni Guo   +22 more
doaj   +1 more source

Linear feedback decoupling--Transfer function analysis

IEEE Transactions on Automatic Control, 1983
The problem of linear system decoupling is examined based on recent results on linear feedback. New insight is obtained, through which resolution of the decoupliug problem is accomplished by calculations, performed directly on the given transfer matrix. Computation of the decoupling compensators follows by easy constructions.
Hautus, M.L.J., Heymann, M.
openaire   +3 more sources

Transfer function analysis of dynamic cerebral autoregulation: A white paper from the International Cerebral Autoregulation Research Network [PDF]

Journal of Cerebral Blood Flow and Metabolism, 2016
Ronney Panerai, David Simpson, Jürgen Claassen   +2 more
exaly   +2 more sources