نتایج جستجو برای: svd

تعداد نتایج: 4424  

2013
Andy Lassiter Serkan Gugercin

Singular Value Decomposition (SVD) is considered to be the holy grail of matrix factorizations. Here an SVD method is used to classify handwritten digits and to aid in the recovery of marred facial images from an ensemble of similar images.

Journal: :Electronics 2023

Aiming at rolling bearing fault diagnosis, the collected vibration signal contains complex noise interference, and one-dimensional information cannot be used to fully mine data features of problem. This paper proposes a diagnosis method based on SVD-GST combined with Vision Transformer. Firstly, is preprocessed reduce using singular value decomposition (SVD) obtain more accurate useful signal. ...

In this paper, experimental responses of the clamped mild steel, copper, and aluminium circular plates are presented subjected to blast loading. The GMDH-type neural networks (Group Method of Data Handling) are then used for the modelling of the mid-point deflection thickness ratio of the circular plates using those experimental results. The aim of such modelling is to show how the mid-point de...

Journal: :Environmental Modelling and Software 2021

In this study, a spatiotemporal estimation method based on Funk singular value decomposition (F-SVD) that considers the correlation of rainfall is proposed to improve estimations from gauge observations. Hourly data several flood events are selected verify by comparing with Inverse Distance Weighting (IDW) and Ordinary Kriging (OK) in Hanjiang basin, China. The results show (1) F-SVD has best p...

Journal: :Brain pathology 2017
Maiko T Uemura Masafumi Ihara Takakuni Maki Takayuki Nakagomi Seiji Kaji Kengo Uemura Tomohiro Matsuyama Raj N Kalaria Ayae Kinoshita Ryosuke Takahashi

Subcortical small vessel disease (SVD) is characterized by white matter damage resulting from arteriolosclerosis and chronic hypoperfusion. Transforming growth factor beta 1 (TGFB1) is dysregulated in the hereditary SVD, CARASIL (cerebral autosomal recessive arteriopathy with subcortical infarcts and leukoencephalopathy). However, very little is known about the role of the largest group in the ...

Journal: :Circulation 2012
Siamak Mohammadi Vincent Tchana-Sato Dimitri Kalavrouziotis Pierre Voisine Daniel Doyle Richard Baillot Sandro Sponga Jacques Metras Jean Perron François Dagenais

BACKGROUND Stentless aortic bioprostheses were designed to provide enhanced hemodynamic performance and potentially greater longevity. The present report describes the outcomes of patients with the Freestyle stentless bioprosthesis followed for ≤18 years. METHODS AND RESULTS Between 1993 and 2011, 430 patients underwent primary aortic valve replacement with a Freestyle bioprosthesis in the su...

Journal: :Srpski arhiv za celokupno lekarstvo 2016
Denisa Salihović Hajdarević Aleksandra M Pavlović Dzevdet Smajlović Ana Podgorac Zagorka Jovanović Tamara Svabić Medjedović Nadezda Covicković Sternić

INTRODUCTION Cerebral ischemic small-vessel disease (SVD), causing lacunar infarcts and white matter hyperintensities on brain magnetic resonance imaging (MRI), is a progressive disease associated with an increased risk of stroke, dementia and death. Increased arterial stiffness has been associated with ischemic stroke and cerebral SVD independently of common vascular risk factors. OBJECTIVE ...

2017
Cheng Xia Hui-Sheng Chen Shi-Wen Wu Wei-Hai Xu

BACKGROUND In this retrospective study, we investigated the main pathogenesis of the two types of isolated pontine infarction: paramedian pontine infarcts (PPIs) and small deep pontine infarcts (SDPIs). METHODS Acute ischemic stroke patients, comprising 117 PPI patients and 40 SDPI patients, were enrolled. High-resolution magnetic resonance imaging (HR-MRI) and routine MRI sequences were perf...

2016
Hyung-Suk Lee Hye Lim Lee Ho-seong Han Minju Yeo Ji Seon Kim Sung-Hyun Lee Sang-Soo Lee Dong-Ick Shin

Ankle brachial index (ABI) and brachial-ankle pulse wave velocity (baPWV) are widely used noninvasive modalities to evaluate atherosclerosis. Recently, evidence has increased supporting the use of ABI and baPWV as markers of cerebrovascular disease. This study sought to examine the relationship between ABI and baPWV with ischemic stroke. This study also aimed to determine which pathogenic mecha...

Journal: :Stroke 2003
Masahiko Hiroki Kotaro Miyashita Hiroshi Yoshida Shunsaku Hirai Hidenao Fukuyama

BACKGROUND AND PURPOSE We investigated the usefulness of central retinal artery (CRA) Doppler flowmetry in patients with cerebral small-vessel disease (SVD). METHODS CRA Doppler flowmetry was performed in 103 SVD patients who underwent MRI. Sixty-four adjusted control subjects were also registered. We assessed average CRA flow parameter values for both eyes with the clinical and MRI findings....

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