Results 41 to 50 of about 678,734 (304)

A Systematic Review of Evidence on the Clinical Effectiveness of Surveillance Imaging in Children With Medulloblastoma and Ependymoma

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Surveillance imaging aims to detect tumour relapse before symptoms develop, but it's unclear whether earlier detection of relapse leads to better outcomes in children and young people (CYP) with medulloblastoma and ependymoma. This systematic review aims to identify relevant literature to determine the efficacy of surveillance magnetic ...
Lucy Shepherd, Melissa Taylor, Helen Fulbright, Bob Phillips   +3 more
wiley   +1 more source

Patient‐Level Barriers and Facilitators to Inpatient Physical Therapy in Adolescents and Young Adults With a Hematological Malignancy: A Qualitative Study

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Despite their increased risk for functional impairment resulting from cancer and its treatments, few adolescents and young adults (AYAs) with a hematological malignancy receive the recommended or therapeutic dose of exercise per week during inpatient hospitalizations.
Jennifer A. Kelleher, Jennifer L. Bernstein, Katia M. Crisler, Julia K. Herriott, Kimberly L. Klages, Robin E. Norris, Mariann L. Strenk, Sarah E. Bills, Meghan E. McGrady   +8 more
wiley   +1 more source

A strategy of neutral-point potential balance control and common-mode voltage suppressio

Gong-kuang zidonghua, 2014
For problems that there are common-mode voltage, over voltage and neutral-point potential imbalance simultaneously in power supply of inverter to motor through long cable, generation mechanisms of common-mode voltage and over voltage were analyzed as ...
WANG Kezhi, ZHAO Wenhan, WANG Tao, YANG Gang, CHENG Guodong, GENG Yiwen   +5 more
doaj   +1 more source

Legislative History of the Fair Labor Standards Act [PDF]

, 1939
With recent advances in power electronic technology, High-Voltage Direct Current (HVDC) transmission system has become an alternative for transmitting power especially over long distances.
Forsythe, John S.
core   +1 more source

Modelling and regulation of dual-output LCLC resonant converters [PDF]

, 2007
The analysis, design and control of 4th-order LCLC voltage-output series-parallel resonant converters (SPRCs) for the provision of multiple regulated outputs, is described.
Ang, Y, Bingham, Chris, Foster, M P, Stone, D A   +3 more
core   +1 more source

INSTABILITIES IN DIGITALLY CONTROLLED VOLTAGE-MODE SYNCHRONOUS BUCK CONVERTER

International Journal of Bifurcation and Chaos, 2012
In this paper, instabilities and bifurcation behavior in a DC–DC digitally controlled voltage-mode synchronous buck converter (SBC) are studied. The bifurcation diagram of the system under a proportional-integral (PI) compensation is presented. Following the system mathematical description in the continuous time domain, the z-domain pulse transfer ...
Dongsheng, Yu, Herbert, H. C. Iu, Hao, Chen, Rodriguez, E., Alarcón Cot, Eduardo José, El Aroudi, Abdelali   +5 more
openaire   +3 more sources

A Mode-switching Strategy of Droop Control for VSC-MTDC Systems Considering Maximum DC Voltage Regulation Capability

CSEE Journal of Power and Energy Systems
To achieve the goal of carbon neutrality, renewable energy integration through a voltage source converter based multi-terminal direct current (VSC-MTDC) system has been identified as a promising solution.
Yizhen Wang, Fengliang Qiu, Zhongguan Wang, Yirun Ji, Zhengguang Chen, Chengshan Wang   +5 more
doaj   +1 more source

Seamless Grid Synchronization of a Proportional+Resonant Control-Based Voltage Controller Considering Non-Linear Loads under Islanded Mode

Energies, 2017
This paper proposes the grid synchronization method of inverter using a quasi Proportional+Multi Resonant (P+MR) control-based voltage controller a stationary reference frame. The inverter supplies a non-linear load under the islanded mode.
Kyungbae Lim, Jaeho Choi
doaj   +1 more source

The Design and Processor-In-The-Loop Implementation of a Super-Twisting Control Algorithm Based on a Luenberger Observer for a Seamless Transition between Grid-Connected and Stand-Alone Modes in Microgrids

Energies, 2023
The abrupt transfer from grid-connected (GC) to stand-alone (SA) operation modes is one of the major issues that may threaten the stability of a distributed generation (DG) system.
Ali Aillane, Karim Dahech, Larbi Chrifi-Alaoui, Aissa Chouder, Tarak Damak, Abdelhak Hadjkaddour, Pascal Bussy   +6 more
doaj   +1 more source

DC-DC Boost Converter with Constant Output Voltage for Grid Connected Photovoltaic Application System [PDF]

, 2010
The main purpose of this paper is to introduce an approach to design a DC-DC boost converter with constant output voltage for grid connected photovoltaic application system.
Chan, Pui Weng
core