Results 121 to 130 of about 122,361 (215)

Some (Hopf) algebraic properties of circulant matrices [PDF]

arXiv, 2011
We study some (Hopf) algebraic properties of circulant matrices, inspired by the fact that the algebra of circulant $n\times n$ matrices is isomorphic to the group algebra of the cyclic group with $n$ elements. We introduce also a class of matrices that generalize both circulant and skew circulant matrices, and for which the eigenvalues and ...
arxiv  

Vector-Circulant Matrices over Finite Fields and Related Codes [PDF]

arXiv, 2014
A vector-circulant matrix is a natural generalization of the classical circulant matrix and has applications in constructing additive codes. This article formulates the concept of a vector-circulant matrix over finite fields and gives an algebraic characterization for this kind of matrix.
arxiv  

Efficient Epistemic Uncertainty Estimation in Cerebrovascular Segmentation [PDF]

arXiv
Brain vessel segmentation of MR scans is a critical step in the diagnosis of cerebrovascular diseases. Due to the fine vessel structure, manual vessel segmentation is time consuming. Therefore, automatic deep learning (DL) based segmentation techniques are intensively investigated.
arxiv  

Research Progress in Pharmacological Effects and Mechanisms of Angelica sinensis against Cardiovascular and Cerebrovascular Diseases

Molecules
Angelica sinensis (Oliv.) Diels (A. sinensis) is a medicinal and edible values substance, which could promote blood circulation and enrich blood.
Linlin Chen, Bei Fan, Fengzhong Wang, Yang Song, Xizhi Wang, Ying Meng, Yumin Chen, Qing Xia, Jing Sun   +8 more
doaj   +1 more source

Association of Obstructive Sleep Apnea With Cardiovascular Outcomes in Patients With Acute Coronary Syndrome. [PDF]

, 2019
Background The prognostic significance of obstructive sleep apnea ( OSA ) in patients with acute coronary syndrome ( ACS ) in the contemporary era is unclear.
Fan, Jingyao, Ma, Xin-Liang, Nie, Shaoping, Somers, Virend K., Wang, Xiao, Wei, Yongxiang   +5 more
core   +1 more source

FlowMRI-Net: A Generalizable Self-Supervised 4D Flow MRI Reconstruction network [PDF]

arXiv
Background: Image reconstruction from highly undersampled 4D flow MRI data can be very time consuming and may result in significant underestimation of velocities depending on regularization, thereby limiting the applicability of the method. The objective of the present work was to develop a generalizable self-supervised deep learning-based framework ...
arxiv  

Hemostazni sistem i ishemijska bolest mozga (specifičnosti vezane za moždanu cirkulaciju I kliničke implikacije) [PDF]

Vojnosanitetski Pregled, 2002
Raičević Ranko, Jovičić Aco, Mandić-Radić Slavka, Đorđević Dragana   +3 more
doaj   +1 more source

Hyperperfusion Syndrome Following Tissue Plasminogen Activator Administration: A Case Report with Radiological Evidence

Journal of the Korean Society of Radiology
Cerebral hyperperfusion syndrome is a rare complication that can occur following carotid artery revascularization procedures in patients with chronic carotid artery stenosis.
Nam Hee Koh, Sam Soo Kim, Ha Yeun Oh, Seongheon Kim, Jae-Won Jang   +4 more
doaj   +1 more source

Cerebrovascular Autoregulation in Preterm Infants Using Heart Rate or Blood Pressure: A Pilot Study

Children
Background: Cerebrovascular autoregulation (CAR) is often impaired in preterm infants but requires invasive mean arterial blood pressure (MABP) measurements for continuous assessment.
Bineta E. Lahr, Celina L. Brunsch, Riksta Dikkers, Arend F. Bos, Elisabeth M. W. Kooi   +4 more
doaj   +1 more source

Graph Neural Network for Cerebral Blood Flow Prediction With Clinical Datasets [PDF]

arXiv
Accurate prediction of cerebral blood flow is essential for the diagnosis and treatment of cerebrovascular diseases. Traditional computational methods, however, often incur significant computational costs, limiting their practicality in real-time clinical applications.
arxiv