Results 71 to 80 of about 14,176,106 (302)

Pitch System Input Contribution on Wind Turbine Main Shaft Bearing Currents

IEEE Access
Drivetrain reliability is a critical challenge for modern large-scale wind turbines, with electrically induced main shaft bearing currents acting as a major threat to bearing longevity.
Jian Zhao, Xuliang Zhu, Kefei Zhu, Ola Carlson   +3 more
doaj   +1 more source

Diffractive model of the high-frequency impedance [PDF]

Physical Review D, 1989
High-frequency diffraction can be described by iterations based on an approximate formulation of the boundary conditions. The method formulated is analogous to the Born series of scattering theory. It is used to study the interaction of short bunches with the beam environment in terms of the impedances.
openaire   +2 more sources

Reconstructing enzyme evolution by protein engineering

FEBS Letters, EarlyView.
Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler, Markus R. Busch, Reinhard Sterner   +2 more
wiley   +1 more source

A new estimator to minimize the error due to breathing in the measurement of respiratory impedance [PDF]

, 1988
This paper presents a new respiratory impedance estimator to minimize the error due to breathing. Its practical reliability was evaluated in a simulation using realistic signals.
Farré Ventura, Ramon, Peslin, René, Navajas Navarro, Daniel, Rotger i Estapé, Maria del Mar   +3 more
core   +1 more source

Hybrid Impedance-Based Controller Design of Grid-Connected Converter for Whole-System Stabilization of Grid-Connected DC Microgrids

IEEE Access
The grid-connected converter (GCC) in a grid-connected DC microgrid performs an important role in stabilising the interaction of the AC and DC sections.
Yuxin Zhu, Fei Wang, Zhengyu Lin, James Fleming   +3 more
doaj   +1 more source

Robot Variable Impedance Skill Transfer and Learning Framework Based on a Simplified Human Arm Impedance Model

IEEE Access, 2020
A variable impedance skill transfer framework is introduced and experimentally evaluated in this article. This framework mainly includes the following: 1.
Rui Wu, He Zhang, Jie Zhao
doaj   +1 more source

Impedance Theory and Modeling

, 2018
CERN Yellow Reports: Conference Proceedings, Vol 1 (2018): Proceedings of the ICFA Mini-Workshop "Impedances and Beam Instabilities in Particle Accelerators"
openaire   +1 more source

Investigating transcription factor dynamics in health and disease using FRAP

FEBS Letters, EarlyView.
FRAP analysis of GFP‐tagged transcription factors reveals how molecular mobility and target engagement change in response to drug treatment. By combining live‐cell imaging, quantitative model fitting, and statistical analysis, this approach uncovers transcription factor dynamics linked to disease mechanisms, providing a powerful framework for ...
Kannan Govindaraj, Carolina Vazquez Garzon, Jose Joaquin Velasco, Janine N. Post   +3 more
wiley   +1 more source

High-frequency Resonance Analysis and Impedance Reshaping Control of MMC-HVDC System Based on Frequency Coupling Impedance Model

Journal of Modern Power Systems and Clean Energy
In recent years, high-frequency resonance (HFR) events occurred in several modular multilevel converter based high-voltage direct current (MMC-HVDC) projects. The time delay of an MMC-HVDC system is the critical factor that induces HFR.
Juanjuan Wang, Wei Chen, Yuekun Liu, Chuang Fu, Yunming Ye, Junjie Feng   +5 more
doaj   +1 more source

Impedance Aggregation Method of Multiple Wind Turbines and Accuracy Analysis

Energies, 2019
The sequence domain impedance modeling of wind turbines (WTs) has been widely used in the stability analysis between WTs and weak grids with high line impedance.
Liang Chen, Heng Nian, Yunyang Xu
doaj   +1 more source