Results 241 to 250 of about 306,024 (298)

Emergence of large-scale patterns in soft quasicrystals. [PDF]

Nat Commun
Chen D, Arora N, Xiang Y, Yao Q, Zhang Q, Rudykh S.   +5 more
europepmc   +1 more source

Guidelines on diagnosis and management of gastroesophageal reflux disease in infants, children and adolescents: a joint consensus from Italian pediatric societies (SIP and SIGENP) -part I. diagnosis. [PDF]

Ital J Pediatr
Salvatore S, Strisciuglio C, Bozzola E, Cappa S, Corsello A, Nardo GD, Fuoti M, Gulino A, Mameli C, Orso M, Pensabene L, Polistena B, Tambucci R, Vassallo F, Romano C, Staiano A, Italian Society of Pediatrics (SIP) and of The Italian Society of Pediatric Gastroenterology Hepatology and Nutrition (SIGENP).   +16 more
europepmc   +1 more source

A Comprehensive Investigation of Infill Geometry Effects on the Mechanical Performance of Polymer 3D Printed Components. [PDF]

Polymers (Basel)
Alzahrani FJ, Alzahrani YS, Alamoudi MT, Alkhateeb M.   +3 more
europepmc   +1 more source

Guidelines for Neuroprognostication in Critically ill Adults with Acute Ischemic Stroke. [PDF]

Neurocrit Care
Mainali S, Fontaine GV, Rajajee V, Montellano FA, Muehlschlegel S, Wartenberg KE, Alexander SA, Busl KM, Hocker SE, Hwang DY, Kim KS, Madzar D, Mahanes D, Meixensberger J, Sakowitz OW, Varelas PN, Weimar C, Westermaier T, Creutzfeldt CJ.   +18 more
europepmc   +1 more source

Interfacial Engineering for High-Output, Mechanically Robust Fully Stretchable Moisture-Electric Generators. [PDF]

Nanomicro Lett
Meng Q, Zhang H, Feng J, Yu M, Sun Y, Wang S, Sun Y, Sun M, Xu J, Xie H, Sun Q, Tian Y.   +11 more
europepmc   +1 more source

Control of a grid connected converter during weak grid conditions

2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG), 2016
The focus on renewable energy sources have been increasing since the late 80s in Denmark. Especially focus on wind power has been increasing, with implementation of big on- and offshore wind farms. However, when installing the wind farms, these are often placed distant from the utility grid, like the case for offshore wind turbines.
Soren Lund Lorenzen, Alex Buus Nielsen, Lorand Bede   +2 more
core   +3 more sources

Frequency and Voltage Stability Analysis of Grid-Forming Virtual Synchronous Generator Attached to Weak Grid [PDF]

IEEE Journal of Emerging and Selected Topics in Power Electronics, 2022
Virtual synchronous generator (VSG) control technique is widely used for the grid-friendly integration of renewable energy. However, when VSG is attached to a weak grid, it is prone to voltage and frequency instability, which aggravates the voltage ...
Chang Li, Yaqian Yang, Yijia Cao
exaly   +2 more sources

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Grid Impedance Impact Analysis of the Weak Grid-Tied VSC

2021 IEEE Green Technologies Conference (GreenTech), 2021
The grid impedance is widely recognized as the key factor to the stability of the grid-tied power electronic devices. However, the influence of the grid impedance ratio is always neglected due to the assumption that grid reactance is much large than grid resistance.
Hong Hu, Rui Yin, Shanshan Wang, Yuanyuan Sun, Guanglu Wu, Bing Zhao, Jianhua Li, Haoyin Ding, Lu Cao, Lin Yu   +9 more
openaire   +1 more source

Connection of inverters to a weak grid

2000 IEEE 31st Annual Power Electronics Specialists Conference. Conference Proceedings (Cat. No.00CH37018), 2002
Connection of an inverter to export power to the mains for a stiff supply is well understood. This paper examines the dynamics of power export to a weak grid. In this case the local bus angle changes for changes in export power which interferes with the process of synthesizing the inverter voltage.
G. Ledwich, H. Sharma
openaire   +1 more source

Structural Weaknesses in the Open Smart Grid Protocol

2015 10th International Conference on Availability, Reliability and Security, 2015
The Open Smart Grid Protocol (OSGP) is currently deployed in various countries in large-scale Smart Metering projects. The protocol was developed by the OSGP Alliance and published as a standard by the European Telecommunications Standards Institute (ETSI).
Klaus Kursawe, Christiane Peters
openaire   +2 more sources