Results 31 to 40 of about 20,680 (162)

Polylysine complexes and their biomedical applications

open access: yesEngineered Regeneration, 2023
Poly-L-lysine (PLL) is a water-soluble biopolymer consist of repeating unit of L-lysine. It displays intrinsic non-antigenicity, antibacterial property, biocompatibility, and biodegradability, and facile synthesis procedure, therefore has attracted ...
Haofang Zhu   +3 more
doaj   +1 more source

A mode switching based transient ride‐through phase‐locked loop

open access: yesIET Power Electronics, 2023
In the case of grid voltage quality problems, the traditional phase‐locked loop (PLL) is hard to detect the accurate grid frequency and phase during the transient response, which will be detrimental to the transient synchronous stability of grid ...
Yiwen Fan   +4 more
doaj   +1 more source

A system-level method for hardening phase-locked loop to single-event effects

open access: yesMaterials Research Express, 2022
To mitigate the sensitivity of the charge pump in a traditional Phase-Locked Loop(PLL), a single-event-hardened PLL architecture with a proportional and integral path is proposed.
Bin Liang   +6 more
doaj   +1 more source

New Mixer Used in Direct Frequency Synthesizer

open access: yesAdvances in Electrical and Electronic Engineering, 2008
Frequency synthesizers are an essential part of any modern transceiver system. They generate clock and oscillator signals needed for up and down conversion.
Milan Stork
doaj  

A Nonlinear Three-Phase Phase-Locked Loop Based on Linear Active Disturbance Rejection Controller

open access: yesIEEE Access, 2017
Three-phase phase-locked loops (PLLs) are the most widely used synchronization components in power systems. For common PLL algorithms, there is a tradeoff between the filtering capability and dynamic response.
Guangyu Sun   +3 more
doaj   +1 more source

Performance Improvement of Quasi-Type-1 PLL by using a Complex Notch Filter

open access: yesIEEE Access, 2016
The synchronous reference frame phase-locked loop (SRF-PLL) is widely used for synchronization applications. However, it suffers from a poor performance under unbalanced and distorted grid conditions.
Yunlu Li   +4 more
doaj   +1 more source

Recurrence of T-Cell Prolymphocytic Leukemia With a Rare Presentation as Diffuse Generalized Skin Lesion

open access: yesJournal of Investigative Medicine High Impact Case Reports, 2023
T-cell prolymphocytic leukemia (T-PLL) is a rare and aggressive neoplasm that originates from mature post-thymic T-cells. Cutaneous manifestations are a common presentation in T-PLL but rarely are a presentation in the recurrent setting.
Mustafa Wasifuddin MD   +4 more
doaj   +1 more source

Improvement of optimization of the drive design for laser scanners based on the analysis of characteristics of scanning devices in construction industry

open access: yesОмский научный вестник
A laser scanning is a promising method of control in construction, providing high accuracy and speed of measurements. Terrestrial laser scanning is one of the key tools within the framework of Building Information Modeling technology, enabling the ...
A. Yu. Turybrin   +2 more
doaj   +1 more source

Aldehyded Dextran and ε-Poly(L-lysine) Hydrogel as Nonviral Gene Carrier

open access: yesStem Cells International, 2013
Background. The expression term of the gene transfected in cells needs to belong enough inorder to make a gene therapy clinically effective. The controlled release of the transfected gene can be utilized.
Yumiko Togo   +7 more
doaj   +1 more source

Improvement of DSOGI PLL Synchronization Algorithm with Filter on Three-Phase Grid-connected Photovoltaic System

open access: yesJurnal Elektronika dan Telekomunikasi, 2018
Synchronous Reference Frame Phase Locked Loop (SRF PLL) has been widely used for synchronization three-phase grid-connected photovoltaic (PV) system. On the grid fault, SRF PLL distorted by negative sequence component and grid harmonic that caused an ...
Rofiatul Izah   +2 more
doaj   +1 more source

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