Results 41 to 50 of about 20,680 (162)

Poly-L-Lysine Induces Fibrosis on Alginate Microcapsules via the Induction of Cytokines

Cell Transplantation, 2001
Alginate – poly-l-lysine (PLL) microcapsules can be used for transplantation of insulin-producing cells for treatment of type I diabetes. In this work we wanted to study the inflammatory reactions against implanted microcapsules due to PLL.
Berit L. Strand, Liv Ryan, Peter In't Veld, Bård Kulseng, Anne Mari Rokstad, Gudmund Skjåk-Bræk, Terje Espevik   +6 more
doaj   +1 more source

A Simple Approach to Reject DC Offset for Single-Phase Synchronous Reference Frame PLL in Grid-Tied Converters

IEEE Access, 2020
Synchronous reference frame phase-locked loop (SRF-PLL) is widely used for grid voltage synchronization in single-phase grid-connected power converters. However, in the actual situation, dc offset component may be introduced in the input of the PLL, due ...
Bin Liu, Mengjun An, Hui Wang, Yanming Chen, Zhigang Zhang, Chenhua Xu, Shaojian Song, Zhilin Lv   +7 more
doaj   +1 more source

Parallel PLL on DAGs

CoRR
1 ...
openaire   +2 more sources

Oscillation suppression strategy for direct drive wind power system based on voltage feedforward compensation for phase locked loop

CSEE Journal of Power and Energy Systems
Due to the fact that the impedance of grid interacts with that of direct-drive wind turbines under weak grid, the direct-drive wind power system (DDWPS) possesses the risk of power oscillation.
Haining Wang, Zhiwei Xie, Yandong Chen, Wenhua Wu, Zili Wang   +4 more
doaj   +1 more source

RF SYNTHESIZER WITH DIRECT DIGITAL SYNTHESIZ

Приборы и методы измерений, 2015
A synthesizer of frequencies with direct digital synthesis and a frequency multiplier on PLL are developed. Phase noises of an output signal of the synthesizer, noise of a loop of PLL, level of collateral radiations on outputs of the digital synthesizer (
V. V. Murav’iov, S. A. Korenevsky, N. M. Naumovich, A. A. Stanul   +3 more
doaj  

An Enhanced Type 3 Phase-Locked Loop with Improved Frequency Estimation Capability Under Grid Distortion

Eng
This paper proposes an enhanced Type 3 phase-locked loop (ET3-PLL) to improve the frequency estimation performance of the conventional Type 3 synchronous reference frame PLL (SRF-PLL) under harmonic distortion.
Youfeng Zhou, Xuetong Wang, Chao Luo, Jiawei Yu, Yihua Zhu, Guangqi Li, Zhiyong Dai   +6 more
doaj   +1 more source

An Efficient Hybrid Filter-Based Phase-Locked Loop under Adverse Grid Conditions

Energies, 2018
Synchronous-reference-frame phase-locked loop (SRF-PLL) is widely used in grid synchronization applications. However, under unbalanced, distorted and DC offset mixed grid conditions, its performance tends to worsen.
Nanmu Hui, Dazhi Wang, Yunlu Li
doaj   +1 more source

Alcohol Dehydrogenase Immobilized at Cerium Hexacyanoferrate (II) Nanoparticles Incorporated Poly-L-Lysine Film for Voltammetric Ethanol Determination

International Journal of Electrochemical Science, 2011
We report a voltammetric ethanol sensor based on alcohol dehydrogenase immobilized at cerium hexacyanoferrate (II) (CeHCF(II)) nanoparticles incorporated poly-L-lysine (PLL) film modified glassy carbon electrode (GCE).
Arun Prakash Periasamy, Jia–Xuan Wei, Shen-Ming Chen   +2 more
doaj   +1 more source

Adaptive Gain Control Method of a Phase-Locked Loop for GNSS Carrier Signal Tracking

International Journal of Antennas and Propagation, 2018
The global navigation satellite system (GNSS) has been widely used in both military and civil fields. This study focuses on enhancing the carrier tracking ability of the phase-locked loop (PLL) in GNSS receivers for high-dynamic application. The PLL is a
Zhibin Luo, Jicheng Ding, Lin Zhao
doaj   +1 more source

FPGA implementation of impedance-compensated phase-locked loop for HVDC converters

The Journal of Engineering, 2018
The phase-locked loop (PLL) plays a key role in HVDC systems. Recently, a new type of PLL called the impedance-compensated phase-locked loop (IC-PLL) was introduced to compensate for the voltage drop across the AC network's Thevenin impedance, making the
Yue Yi, Ajinai Ajinai, Aniruddha M.. Gole   +2 more
doaj   +1 more source