Results 31 to 40 of about 6,211,757 (240)

Performance analysis of pulse analog control schemes for LLC resonant DC/DC converters suitable in portable applications

Journal of Electrical Systems and Information Technology, 2016
Performance Analysis of Pulse Analog Control Schemes, predominantly Pulse-Width Modulation (PWM) and Pulse-Position Modulation (PPM) for LLC resonant DC/DC converter suitable in portable applications is addressed in this paper.
P. Kowstubha, K. Krishnaveni, K. Ramesh Reddy   +2 more
doaj   +1 more source

Performance Analysis of Hybrid Radio Frequency and Free Space Optical Communication Networks with Cooperative Spectrum Sharing

Photonics, 2021
This paper investigates the impact of cooperative spectrum sharing policy on the performance of hybrid radio frequency and free space optical wireless communication networks, where primary users and secondary users develop a band of the same spectrum ...
Dong Qin, Yuhao Wang, Tianqing Zhou
doaj   +1 more source

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

FEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

Adaptive secondary frequency regulation strategy with coordinated virtual power plants

Zhongguo dianli
Virtual power plant (VPP) can effectively enhance the frequency resilience of the power systems by collaboratively scheduling energy storage resources through communication networks to participate in secondary frequency regulation (SFR).
Zesen WANG, Xuanyuan WANG, Shuaihao KONG, Bohao SUN, Zhen JI, Wei SUN, Yajian ZHANG, Jiafang ZHANG, Chen PENG   +8 more
doaj   +1 more source

The human gut microbiome across the life course

FEBS Letters, EarlyView.
Despite significant individual variation and continuous change throughout life, the human gut microbiome follows some life stage‐specific trends. This article provides a brief overview of how gut microbiome composition shifts across different phases of life. Created in BioRender. Özkurt, E. (2026) https://BioRender.com/8q4nrnc.
Alise J. Ponsero, Basak Bahcivanci, Antonietta Hayhoe, Animesh Acharjee, Ezgi Özkurt   +4 more
wiley   +1 more source

Improvement of CPS in High-Proportion New-Energy Power System and Practical Application

Energies
With the integration of high-penetration new energy, the increasing disparities in power source structures across interconnected power system control areas have become prominent.
Zhen Huang, Wenbo Yang, Lei Chen, Kaiyuan Hou, Deming Xia, Fei Xu, Yong Min, Ziye Zhou   +7 more
doaj   +1 more source

Periodical Ultra-Modulation of Broadened Laser Spectra in Dielectrics at Variable Ultrashort Laser Pulsewidths: Ultrafast Plasma, Plasmonic and Nanoscale Structural Effects

Photonics, 2023
Self-phase modulation (SPM) broadening of prompt laser spectra was studied in a transmission mode in natural and synthetic diamonds at variable laser wavelengths (515 and 1030 nm), pulse energies and widths (0.3–12 ps, positively chirped pulses ...
Sergey Kudryashov, Pavel Danilov, Alexey Gorevoy, Volodymyr Kovalov, Mikhail Kosobokov, Andrey Akhmatkhanov, Boris Lisjikh, Anton Turygin, Evgeny Greshnyakov, Vladimir Shur   +9 more
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

RGB generation by four-wave mixing in small-core holey fibers [PDF]

, 2007
We report the generation of white light comprising red, green, and blue spectral bands from a frequency-doubled fiber laser by an efficient four-wave mixing process in submicron-sized cores of microstructured holey fibers.
Horak, P., David J. Richardson, Nilsson, J., Dupriez, P., Richardson, D.J., Poletti, F., Johan Nilsson, David N. Payne, Marco N. Petrovich, Pascal Dupriez, Payne, D.N., Petrovich, M.N., Jeong, Y., Yoonchan Jeong, Peter Horak, Francesco Poletti   +15 more
core   +1 more source

Secondary Frequency Modulation Strategy for Hybrid Energy Storage Systems Considering the Response Characteristics of Thermal Power and Compressed Air Energy Storage

分布式能源
With the large-scale integration of high-penetration renewable energy into the power grid, there are increasing demands for frequency regulation. To address the issues of high regulation losses and poor economic performance resulting from the frequent ...
Zhuo CHEN, Laijun CHEN, Sen CUI, Hanchen LIU, Xinyu WANG   +4 more
doaj   +1 more source