Results 71 to 80 of about 2,759 (244)
Analysis of DC voltage oscillation mechanism in AC/DC hybrid distribution system
The Journal of Engineering, 2019 DC voltage oscillation occurs more and more frequently in voltage source converter (VSC)-based AC/DC hybrid distribution system (AC/DC HDS). However, currently, the explanation of the oscillation mechanism is not clear enough.
Luyang Li +4 more
doaj +1 more source
New 5 Kilowatt Free-piston Stirling Space Convertor Developments [PDF]
, 2007 The NASA Vision for Exploration of the moon may someday require a nuclear reactor coupled with a free-piston Stirling convertor at a power level of 30-40 kW. In the 1990s, Mechanical Technology Inc.
Brandhorst, Henry W., Jr. +1 more
core +1 more source
, 2008 We describe an electron spectrometer designed for a precision measurement of the neutron $\beta$-asymmetry with spin-polarized ultracold neutrons. The spectrometer consists of a 1.0-Tesla solenoidal field with two identical multiwire proportional chamber
Abele +29 more
core +1 more source
Molecular Oncology, EarlyView.Meta‐transcriptome analysis identified FGF19 as a peptide enteroendocrine hormone associated with colorectal cancer prognosis. In vivo xenograft models showed release of FGF19 into the blood at levels that correlated with tumor volumes. Tumoral‐FGF19 altered murine liver metabolism through FGFR4, thereby reducing bile acid synthesis and increasing ...
Jordan M. Beardsley +5 more
wiley +1 more source
Parallel current-controlled synchronverters for voltage and frequency regulation in weak grids
The Journal of Engineering, 2019 The emulation of synchronous machines is becoming an attractive solution to provide virtual inertia and voltage support to weak grids and microgrids, representing an alternative to conventional current-injection control strategies.
Javier Roldán-Pérez +2 more
doaj +1 more source
Testing of the Advanced Stirling Radioisotope Generator Engineering Unit at NASA Glenn Research Center [PDF]
The Advanced Stirling Radioisotope Generator (ASRG) is a high-efficiency generator being developed for potential use on a Discovery 12 space mission. Lockheed Martin designed and fabricated the ASRG Engineering Unit (EU) under contract to the Department ...
Lewandowski, Edward J.
core +1 more source
Subtype‐specific enhancer RNAs define transcriptional regulators and prognosis in breast cancers
Molecular Oncology, EarlyView.This study employed machine learning methodologies to perform the subtype‐specific classification of RNA‐seq data sets, which are mapped on enhancers from TCGA‐derived breast cancer patients. Their integration with gene expression (referred to as ProxCReAM eRNAs) and chromatin accessibility profiles has the potential to identify lineage‐specific and ...
Aamena Y. Patel +6 more
wiley +1 more source
Weak Coupling Effects in the PLL Modes of Grid‐Following PMSG Wind Power Systems
IET Renewable Power GenerationSmall‐signal synchronisation stability is a critical issue of grid‐connected permanent magnet synchronous generator (PMSG) wind power systems employing grid‐following voltage source converters (VSCs).
Xumeng Cui +5 more
doaj +1 more source
The Journal of Engineering, 2019 This study presents a switch-mode assisted linear amplifier (SMALA) designed for use as a frequency-domain spectroscopy (FDS) excitation voltage source for the diagnostic testing of oil/paper insulation systems in large power transformers.
Shawn D. Nielsen +2 more
doaj +1 more source
Development of a Power Electronics Controller for the Advanced Stirling Radioisotope Generator [PDF]
Under a U.S. Department of Energy program for radioisotope power systems, Lockheed Martin is developing an Engineering Unit of the Advanced Stirling Radioisotope Generator (ASRG).
Keiter, Douglas E. +3 more
core +1 more source