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Apr 4, 2024 · Online monitoring of Partial Discharges (PDs) for high-voltage power transformers is vital as it continuously tracks PD activities within a power transformer and warns about possible insulation failures at an early stage. Wall-mounted UHF PD sensors are convenient for non-contact online PD monitoring inside power transformers. Conventionally used wall-mounted UHF PD sensors offer limited ...
Sub-harmonic frequencies are attenuated by operating the transformer at relatively high flux density, which is effective in reducing or eliminating them. Above the fundamental frequency, noise is reduced by introducing as much leakage inductance as possible, consistent with good power transfer to the secondary.
5 days ago · Tokamak. The reaction chamber of the DIII-D, an experimental tokamak fusion reactor operated by General Atomics in San Diego, which has been used in research since it was completed in the late 1980s. The characteristic torus-shaped chamber is clad with graphite to help withstand the extreme heat. A tokamak ( / ˈtoʊkəmæk /; Russian ...
2 days ago · In radio astronomy, a fast radio burst ( FRB) is a transient radio pulse of length ranging from a fraction of a millisecond, for an ultra-fast radio burst, [2] [3] to 3 seconds, [4] caused by some high-energy astrophysical process not yet understood. Astronomers estimate the average FRB releases as much energy in a millisecond as the Sun puts ...
Apr 10, 2024 · 2019. Abstract: The design of a High-Frequency Transformer for High Current DC power supply has great significance and importance. This report will include a research concept of DC-DC converter working principle, and the research of transformer core selections, the selection of transformer specifications, material selections, high-frequency ...
Apr 18, 2024 · Medical ultrasound includes diagnostic techniques (mainly imaging techniques) using ultrasound, as well as therapeutic applications of ultrasound. In diagnosis, it is used to create an image of internal body structures such as tendons, muscles, joints, blood vessels, and internal organs, to measure some characteristics (e.g. distances and velocities) or to generate an informative audible sound.
Apr 9, 2024 · Haplogroup O-M122. Haplogroup O-M122 (also known as Haplogroup O2 (formerly Haplogroup O3 )) is an Eastern Eurasian Y-chromosome haplogroup. The lineage ranges across Southeast Asia and East Asia, where it dominates the paternal lineages with extremely high frequencies.
