Results 51 to 60 of about 2,043,803 (299)

Evaluation of a GaN HEMT transistor for load- and supply-modulation applications using intrinsic waveform measurements

, 2010
In this paper, the efficiency of a GaN HEMT transistor and its intrinsic waveforms are measured at 0.9 GHz and investigated for load- and supply-modulation applications.
Tasker, Paul J., Benedikt., Johannes, Fager, Christian, Clarke, Alan L., Cripps, Stephen Charles, Mashad Nemati, Hossein, Steve C. Cripps, Jan Grahn, Herbert Zirath, Johannes Benedikt, S. C. Cripps, A. L. Clarke, H. Zirath, H. Mashad Nemati, Grahn, Jan, Zirath, Herbert, Christian Fager, Paul J. Tasker, J. Grahn, Cripps, Steve C., Clarke, Alan Leslie, Benedikt, Johannes, C. Fager, Alan L. Clarke, J. Benedikt, Hossein Mashad Nemati, P. J. Tasker, Fager, Christian,, Cripps, Steve C.,, Clarke, Alan L.,, Zirath, Herbert,, Benedikt., Johannes,, Tasker, Paul J.,, Grahn, Jan,, Mashad Nemati, Hossein,   +34 more
core   +1 more source

Load modulation for damping of electro-mechanical oscillations

, 2001
Today it is feasible for utilities to control selected customer loads in a nondisturbing fashion. This is comparable to load shedding, but has a wider area of application.
O. Samuelsson, Lund University., Samuelsson, Olof,   +2 more
core   +2 more sources

Optimization and Improvement of Frequency Modulation Auxiliary Service Control System for the 700 MW Unit

南方能源建设, 2021
[Introduction] The DCS system of two 700 MW units adopting "constant-sliding-constant" variable pressure operation mode in Zhuhai Power Plant adopts DIASYS Netmation distributed control system, which is provided by Mitsubishi company of Japan. At present,
LI Qiang
doaj   +1 more source

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 hybrid multilevel converter for medium and high voltage applications [PDF]

, 2010
This paper investigates the suitability of the hybrid multilevel converter for medium and high voltage application. The converter operation, modulation, and capacitor voltage balancing method are described in detail.
Ahmed, Khaled, Adam, Grain Philip, Finney, Stephen, Singh, N.K., Williams, Barry   +4 more
core   +2 more sources

Extension of Quasi-Load Insensitive Generalized Class-E Doherty Operation with Complex Load Trajectories

Chips
This paper extends the quasi-load insensitive (QLI) Class-E Doherty power amplifier (PA) design methodology to address Doherty PA combiners with complex load impedance trajectories.
Mehdi Otmani, Ayssar Serhan, Jean-Daniel Arnould, Estelle Lauga-Larroze, Pascal Reynier, Alexandre Giry   +5 more
doaj   +1 more source

Frequency Modulation Control of Hydraulic Wind Turbines Based on Ocean Used Wind Turbines and Energy Storage

Energies, 2022
Based on the energy storage type of hydraulic wind turbines (HWTs) and in view of the unit frequency drop problem under high wind power proportion conditions, this paper proposes a method of primary frequency control under maximum power point tracking ...
Lijuan Chen, Pengfei Zheng, Wei Gao, Jishang Jiang, Jiafei Chang, Rukang Wu, Chao Ai   +6 more
doaj   +1 more source

Nutrient/TOR signaling controls adipose mitochondrial transcription factor A (TFAM) to regulate organismal growth in Drosophila

FEBS Letters, EarlyView.
Animals must match their growth rate to available nutrients. We show that in Drosophila larvae, the nutrient‐sensing TOR kinase controls growth by regulating levels of TFAM, a key regulator of mitochondrial function, in the adipose tissue. When nutrients are abundant, high TOR activity suppresses TFAM, lowering mitochondrial bioenergetic activity and ...
Shrivani Sriskanthadevan‐Pirahas, Shahoon Khan, Abhishek Sharma, Byoungchun Lee, Savraj S. Grewal   +4 more
wiley   +1 more source

Characterizing chip's behavior of HF RFID cards during load modulation

, 2017
The chip (Integrated circuit) is the most complex element on an HF RFID card which is composed of multiple stages and transistors. The communication between the card and reader is achieved through load modulation.
Ralph Prestros, Prestros, Ralph, Shrief Rizkalla, Rizkalla, Shrief, Mecklenbräuker, Christoph, Christoph F. Mecklenbrauker   +5 more
core   +1 more source

Analytical Design Space of Power Amplifiers Including the Class-A/B/J Continuum for Dynamic Load Modulation

IEEE Access, 2019
In this paper, an analytical design space of power amplifiers (PAs) including the Class-A/B/J continuum for dynamic load modulation (DLM) at the current generator plane (CGP) is proposed based on the theory of load modulated (LM) continuous Class-B/J PAs.
Xuekun Du, Mohamed Helaoui, Chang Jiang You, Xiang Li, Yulong Zhao, Jingye Cai, Fadhel M. Ghannouchi   +6 more
doaj   +1 more source