Results 61 to 70 of about 366,764 (206)

Hepatitis C lipo-Viro-particle from chronically infected patients interferes with TLR4 signaling in dendritic cell. [PDF]

open access: yesPLoS ONE, 2007
BACKGROUND: Hepatitis C virus (HCV) can be purified from serum of chronically-infected patients in the form of Lipo-Viro-Particles (LVP), which are triglycerid-rich lipoprotein-like particles containing viral RNA and proteins.
Sophie Agaugué   +3 more
doaj   +1 more source

Proportion and failure analysis of full-bridge sub-modules in a hybrid MMC

open access: yesThe Journal of Engineering, 2019
Isolating DC bipolar short-circuit fault is one of the difficulties faced by the flexible DC distribution system. This study aims to the hybrid modular multi-level converter (MMC).
Yonghui Song   +3 more
doaj   +1 more source

Antiferromagnetism at the YBa2Cu3O7 / La2/3Ca1/3MnO3 interface

open access: yes, 2004
The magnetic properties of a series of YBa2Cu3O7-x/La2/3Ca1/3MnO3 (YBCO/LC1/3MO) superlattices grown by dc sputtering at high oxygen pressures (3.5 mbar) show the expected ferromagnetic behaviour. However, field cooled hysteresis loops at low temperature
E. Baca   +7 more
core   +1 more source

Analysis and design of DC blocks

open access: yesElectronics Letters, 1981
Four types of microstrip coupled line DC blocks are analysed and expressions for the theoretically possible maximum bandwidth for a given ripple are derived. A procedure for designing a DC block to meet a given set of ripple and bandwidth specifications is indicated.
Borgaonkar, SR, Rao, SN
openaire   +1 more source

Neutral-point-clamped hybrid multilevel converter with DC fault blocking capability for medium-voltage DC transmission

open access: yesJournal of Modern Power Systems and Clean Energy, 2017
This paper proposes a novel hybrid multilevel converter with DC fault-blocking capability, i.e., the neutral-point clamped hybrid multilevel converter (NHMC).
Xinyu YU   +5 more
doaj   +1 more source

Operation analysis of thyristor based front-to-front active-forced-commutated bridge DC transformer in LCC and VSC hybrid HVDC networks [PDF]

open access: yes, 2017
The active-forced-commutated (AFC) bridge employs a symmetrical thyristor-bridge with auxiliary self-commutated full-bridge chain-link (FB-CL) circuit to assist its soft transition and forced commutation.
Adam, Grain P.   +3 more
core   +2 more sources

Excess phase in microstrip DC blocks

open access: yesElectronics Letters, 1984
The letter gives details of excess phase calculations and measurements on microstrip DC breaks. Published microstrip discontinuity data has been used to develop an equivalent circuit which yields very good agreement between experimental and theoretical phase results over the frequency range 8 to 12 GHz.
C.E. Free, C.S. Aitchison
openaire   +1 more source

Transient overvoltage suppression measures for new energy high penetration system at the sending end under bipolar blocking fault

open access: yes电力工程技术
Aiming at the transient overvoltage problem in the new energy high-penetration area of the feeder due to DC bipolar blocking fault, a converter bus reactive power allocation capacity optimization scheme is proposed with the constraint that the transient ...
Xinyue LI   +4 more
doaj   +1 more source

A novel protection scheme for an LVDC distribution network with reduced fault levels [PDF]

open access: yes, 2017
Low Voltage Direct Current (LVDC) distribution is one of the new promising technologies that have the potential to accelerate the wider integration of distributed renewables.
Burt, Graeme   +2 more
core   +1 more source

Study on Emergency Load Shedding of Hybrid AC/DC Receiving-End Power Grid with Stochastic, Static Characteristics-Dependent Load Model

open access: yesEnergies, 2019
When large-capacity HVDC (high voltage direct current) transmission line blocking occurs in a hybrid AC/DC (alternating current/direct current) power grid, the receiving-end system will encounter a huge power imbalance, which will lead to a frequency ...
Yingying Jiang   +6 more
doaj   +1 more source

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