Results 31 to 40 of about 1,075,155 (309)

Overcurrent Protection Control Design for DC-DC Buck Converter With Disturbances [PDF]

open access: yesIEEE Access, 2019
This paper deals with the output voltage regulation problem for dc-dc buck converters. Overcurrent protection and disturbances are both taken into consideration. The main challenge of control design is how to ensure that the current constraints are not violated at any time in the presence of disturbances.
Tian Liang Guo   +2 more
openaire   +2 more sources

Using Milk Urea Nitrogen to Evaluate Diet Formulation and Environmental Impact on Dairy Farms

open access: yesThe Scientific World Journal, 2001
Reducing nitrogen (N) excretion by dairy cattle is the most effective means to reduce N losses (runoff, volatilization, and leaching) from dairy farms.
J.S. Jonker, R.A. Kohn
doaj   +1 more source

Analysis and hardware testing of cell capacitor discharge currents during DC faults in half-bridge modular multilevel converters [PDF]

open access: yes, 2015
This paper focuses on the behaviour of the cell capacitor discharge currents during DC faults in half-bridge modular multilevel converters. Active switches, not designed for fault conditions, are tripped to minimize discharge currents effect on the ...
Aboushady, A.A., Ahmed, K.H., Jovcic, D.
core   +2 more sources

Protection of large partitioned MTDC networks using DC-DC converters and circuit breakers [PDF]

open access: yes, 2016
This paper proposes a DC fault protection strategy for large multi-terminal HVDC (MTDC) network where MMC based DC-DC converter is configured at strategic locations to allow the large MTDC network to be operated interconnected but partitioned into ...
Rahman, Md Habibur   +2 more
core   +1 more source

IMPACT OF AGRICULTURAL MANAGEMENT ON COMMUNITIES OF ORIBATIDA, GAMASINA AND COLLEMBOLA IN ITALIAN AND FRENCH VINEYARDS

open access: yesEQA, 2018
Quantitative and qualitative analyses among the soil microarthropods can be used in biomonitoring as tools in multi-disciplinary approach to characterize soil quality.
Sauro Simoni   +6 more
doaj   +1 more source

A Local Protection and Local Action Strategy of DC Grid Fault Protection

open access: yesEnergies, 2020
Fast detection and isolation of direct current (DC) faults are key issues for DC grids. Therefore, it is very necessary to study the fault protection principle for DC grids. This paper firstly presents the main difficulties in DC fault protection.
Jingqiu Yu, Zheren Zhang, Zheng Xu
doaj   +1 more source

Ordinal dose-response modeling approach for the phthalate syndrome

open access: yesEnvironment International, 2020
Background: The phthalate syndrome (PS) is a collection of related male reproductive developmental effects, ranging in severity, that have been observed in rats after gestational exposure to developmentally-toxic phthalates. For statistical purposes, the
Todd D. Blessinger   +6 more
doaj   +1 more source

An optimal protection scheme for spatially distributed UHVDC transmission systems

open access: yesZhejiang dianli
Spatially distributed UHVDC transmission systems eliminate the need for AC transmission lines converging at a converter station by enabling DC power transmission at remote locations.
HU Yunpeng   +5 more
doaj   +1 more source

Design and Development of a Class EF2 Inverter and Rectifier for Multi-megahertz Wireless Power Transfer Systems [PDF]

open access: yes, 2016
This paper presents the design and implementation of a Class EF2 inverter and Class EF2 rectifier for two -W wireless power transfer (WPT) systems, one operating at 6.78 MHz and the other at 27.12 MHz.
Aldhaher, S, Mitcheson, PD, Yates, DC
core   +1 more source

Peace, Prosperity and Safety Nets in Timor‐Leste: Competing Priorities or Complementary Investments?

open access: yesAsia & the Pacific Policy Studies, 2014
Social protection cash transfers are a vital policy instrument in tackling poverty, and provide an affordable, broad‐based foundation for inclusive growth and social stability.
Pamela Dale   +2 more
doaj   +1 more source

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