Results 61 to 70 of about 1,521,192 (154)

Calculation of the optical response of C60 and Na8 using time-dependent density functional theory and local orbitals [PDF]

, 2001
We report on a general method for the calculation of the frequency-dependent optical response of clusters based upon time-dependent density functional theory (TDDFT).
Martin, Richard M., Sanchez-Portal, Daniel, Tsolakidis, Argyrios   +2 more
core   +1 more source

Fast Frequency Sweep Technique Based on Segmentation for the Acceleration of the Electromagnetic Analysis of Microwave Devices

Applied Sciences, 2019
The characterization of communication devices in a certain frequency band can be accelerated if a fast frequency sweep technique is used instead of a discrete frequency sweep.
Juan A. Martinez, Angel Belenguer, Héctor Esteban   +2 more
doaj   +1 more source

On the fundamental resonant mode of inhomogeneous soil deposits [PDF]

, 2020
The problem of estimating seismic ground deformation is central to state-of-practice procedures of designing and maintaining infrastructure in earthquake-prone areas.
Asimaki, Domniki, Garcia-Suarez, Joaquin
core  

Market-based Control of Air-Conditioning Loads with Switching Constraints for Providing Ancillary Services

, 2018
Air-conditioning loads (ACLs) are among the most promising demand side resources for their thermal storage capacity and fast response potential. This paper adopts the principle of market-based control (MBC) for the ACLs to participate in the ancillary ...
Cheng, Yizhi, Yao, Yao, Zhang, Peichao
core   +1 more source

Characterization of a Fast Battery Energy Storage System for Primary Frequency Response

Energies, 2018
In response to increasing integration of renewable energy sources on electric grid systems, battery energy storage systems (BESSs) are being deployed world-wide to provide grid services, including fast frequency regulation.
Karl Stein, Moe Tun, Marc Matsuura, Richard Rocheleau   +3 more
doaj   +1 more source

Transient energy storage systems for fast frequency response: Power‐train considerations

IET Renewable Power Generation
Renewable energy sources generate power intermittently, which poses challenges in meeting power demand. The use of transient energy storage systems (TESSs) has proven to be an effective solution to this issue.
Yiheng Hu, Nigel Schofield, Nan Zhao
doaj   +1 more source

Third-order nonlinear optical properties of bismuth-borate glasses measured by conventional and thermally managed eclipse Z scan

, 2007
Third-order nonlinearity one order of magnitude larger than silica is measured in bismuth-borate glasses presenting a fast response (<200 fs). The results for the sign and magnitude of the nonlinearity were obtained using a combination of the eclipse ...
Carvalho, Isabel C.S., de Araújo, C.B., de Araújo, R.E., Falcão Filho, E.L., Gomes, A.S.L., Kazansky, Peter G., Mezzapesa, Francesco P., Rativa, Diego, Sakaguchi, Koichi   +8 more
core   +1 more source

Techno-Economic Feasibility of Fuel Cell Vehicle-to-Grid Fast Frequency Control in Non-Interconnected Islands

Hydrogen
This paper presents an innovative approach to fast frequency control in electric grids by leveraging parked fuel cell electric vehicles (FCEVs), especially heavy-duty vehicles such as trucks.
Tziotas Christos, Evangelos E. Pompodakis, Georgios I. Orfanoudakis   +2 more
doaj   +1 more source

Rapid adaptation of a polygenic trait after a sudden environmental shift

, 2017
Although a number of studies have shown that natural and laboratory populations initially well-adapted to their environment can evolve rapidly when conditions suddenly change, the dynamics of rapid adaptation are not well understood.
Jain, Kavita, Stephan, Wolfgang
core   +1 more source

Machine learning-based fast frequency response control for a VSC-HVDC system

CSEE Journal of Power and Energy Systems, 2021
Kaiqi Sun, Huangqing Xiao, Shengyuan Liu, Yilu Liu   +3 more
doaj   +1 more source