Results 11 to 20 of about 132,712 (265)

Characterization and Defect Analysis of Machined Regions in Al-SiC Metal Matrix Composites Using an Abrasive Water Jet Machining Process

open access: yesApplied Sciences, 2020
Metal matrix composite (MMC) materials are increasingly used in industrial sectors such as energy, structural, aerospace, and automotive. This is due to the improvement of properties by the addition of reinforcements.
Pedro F. Mayuet Ares   +3 more
doaj   +1 more source

Active power losses distribution methods for the modular multilevel converter [PDF]

open access: yes, 2016
Modular Converters such as the MMC have become the new standard in VSC-HVDC applications. Their modularity has brought many industrial advantages but also increased the complexity of their operation.
Merlin, MMC, Mitcheson, PD
core   +1 more source

Multi-terminal dc grid overall control with modular multilevel converters

open access: yesЗаписки Горного института, 2020
This paper presents a control philosophy for multiterminal DC grids, which are embedded in the main AC grid. DC transmission lines maintain higher power flow at longer distances compared with AC lines. The voltage losses are also much lower.
Miguel Jiménez Carrizosa   +4 more
doaj   +1 more source

Product Development And Performance of Reinforced Metal Matrix Composite Brake Disc: Modelling, Simulation And Multi-Criteria Decision Making Technique

open access: yesSpektrum Industri: Jurnal Ilmiah Pengetahuan dan Penerapan Teknik Industri, 2021
Demand for lightweight and durable components for automotive applications is increasing, such as brake discs. This paper presents an investigation on new material for brake discs which is metal matrix composite (MMC).
Nanang Fatchurrohman   +2 more
doaj   +1 more source

Influence of Ceramic Particles Reinforcement on some Mechanical Properties of AA 6061 Aluminium Alloy [PDF]

open access: yesEngineering and Technology Journal, 2013
This paper is to investigate the influence of adding 5,10 and 15 weight percentage silicon carbide particles on some mechanical properties of 6061 Aluminium alloy. The composites Al6061/SiC were prepared by stir casting technique.
Jameel Habeeb Ghazi
doaj   +1 more source

Impedance Modeling Method of Offshore Wind Farm Integration Through MMC-HVDC With MMC Circulation Control

open access: yesZhongguo dianli, 2023
Based on impedance analysis, this paper focuses on the circulation control of a modular multilevel converter (MMC) and conducts in-depth research on the stability impact of offshore wind farm integration based on a permanent magnetic synchronous ...
Shuting YANG   +3 more
doaj   +1 more source

Generalized Voltage-based State-Space Modelling of Modular Multilevel Converters with Constant Equilibrium in Steady-State [PDF]

open access: yes, 2017
This paper demonstrates that the sum and difference of the upper and lower arm voltages are suitable variables for deriving a generalized state-space model of an MMC which settles at a constant equilibrium in steady-state operation, while including the ...
Bergna-Diaz, Gilbert   +4 more
core   +3 more sources

PROFILE OF NEURAL TUBE DEFECT IN RSUD Dr. SOETOMO, 2013-2018

open access: yesJurnal Berkala Epidemiologi, 2022
Background: Congenital abnormalities are structural growth abnormalities that have arisen since the intrauterine life caused by many factors, including genetics, pregnancy nutrition, infection, and social status.
Mohammad Nata Ardiansyah   +3 more
doaj   +1 more source

Prevalence of Obesity among School Going Adolescents in Urban and Rural Areas of District Meerut, Uttar Pradesh, India [PDF]

open access: yesHealthline, 2020
Introduction : The present century had noticed a rapid transition from undernourished to overweight and obesity. This transition was initially reported in developed countries but now this phenomenon has been noticed in developing countries. Objective:
S. K. Raghav   +5 more
doaj  

A Case Series of Cutaneous Lupus Erythematosus Progressing to Systemic Lupus Erythematosus in a Lightning Phase [PDF]

open access: yesJournal of Clinical and Diagnostic Research, 2023
Discoid Lupus Erythematosus (DLE) is a chronic, disfiguring, inflammatory skin disease characterised by erythematous, indurated, well-defined scaly plaques of varying sizes that resolve with atrophy, scarring, and pigmentary changes.
Rajkumar Kannan   +3 more
doaj   +1 more source

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