Results 111 to 120 of about 41,214 (311)
Five-Level Current-Source Inverters With Buck–Boost and Inductive-Current Balancing Capabilities
, 2010 This paper presents new five-level current-source inverters (CSIs) with voltage/current buck–boost capability, unlike existing five-level CSIs where only voltage–boost operation is supported.
Loh, Poh Chiang +8 more
core +1 more source
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objectives We aimed to determine the frequency of subclinical optic nerve (ON) lesions using MRI, optical coherence tomography (OCT), and visual evoked potentials (VEP) in radiologically isolated syndrome (RIS), and to assess their diagnostic and prognostic significance.
Christine Lebrun‐Frenay +13 more
wiley +1 more source
Asymmetrical Γ-Source Inverters
, 2014 Impedance-source inverters are inverters with voltage-buck-boost capability that cannot be achieved by the traditional inverters. Their boost capability is introduced by shorting their phase legs without causing damages.
Wei, Mo +2 more
core +1 more source
T1 Over Squared Proton Density Ratio to Characterize Multiple Sclerosis Lesions
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective Differentiating remyelinated from demyelinated lesions in MS remains challenging without histological confirmation. This study introduces the T1‐to‐PD2 ratio (TPR) imaging approach and evaluates its ability to characterize MS lesions alongside other quantitative MRI (qMRI) metrics. Methods Thirty individuals with MS (mean age: 47.5 ±
Sarah J. Wright +10 more
wiley +1 more source
A hybrid control strategy for Z-source inverter DG systems
Automatika, 2019 A hybrid control system for Z-source inverter (ZSI) with LC filter which is used in distributed generation (DG) systems is presented in this study. The proposed system has two different controllers, dc-side and ac-side.
Özgun Girgin, Mustafa Hadi Sarul
doaj +1 more source
On invertibility and positive invertibility of matrices
Linear Algebra and its Applications, 2001 Let \(A=[a_{ij}]\) be an \(n\times n\) complex matrix whose diagonal entries are all nonzero. For each \(k\) define \[ \tilde{v}_{k}:=\max\left\{\left|a_{jk}\right|:j=1,\dots ,k-1\right\} \text{ and }\tilde{w}_{k}:=\max\left\{ \left|a_{jk}\right|:j=k+1,\dots ,n-1\right\} \] and put \[ m:=\prod_{k=2}^{n}\left( 1+\frac{\tilde{v}_{k}}{\left|a_{kk}\right|}\
openaire +2 more sources
Analysis of Soft Switching Three Level Inverters
, 2016 This study represents a review of soft-switching three level (S3L) inverters. Inverters are classified two levels, three levels and multilevel inverters basically.
BODUR, Hacı +2 more
core
Survey on fault operation on multilevel inverters
, 2010 This paper is related to faults that can appear in multilevel (ML) inverters, which have a high number of components. This is a subject of increasing importance in high-power inverters.
Pou, Josep +9 more
core +1 more source
Upper Cervical Cord Area as a Biomarker of Conversion to Secondary Progressive Multiple Sclerosis
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective This study assessed whether upper cervical cord area (UCCA) measured on routine brain MRI can serve as a biomarker of conversion to SPMS. Methods This is a single‐center retrospective cohort study of RRMS patients with cross‐sectional and longitudinal analyses of clinical and MRI data. Future SPMS converters were matched by age, sex,
Nabil K. El Ayoubi +8 more
wiley +1 more source
Single-DC-Source Multilevel Inverters [electronic resource] /
The purpose of this book is to distinguish the single-de-source multilevel inverter topologies and to teach their control, switching and voltage balancing. It includes new information on voltage balancing and control of multilevel inverters.
SpringerLink (Online service) +2 more
core +1 more source