Results 31 to 40 of about 1,206,578 (296)

Are giant resonances harmonic vibrations? [PDF]

Nuclear Physics A, 1996
Abstract We investigate the non-linear response of a quantum anharmonic oscillator as a model for the excitation of giant resonances in heavy ion collisions. We show that the introduction of small anharmonicities and non-linearities can double the predicted cross section for the excitation of the two-phonon states.
Volpe, C., Chomaz, P., Andrés, M.V., Catara, F., Lanza, E.G.   +4 more
openaire   +2 more sources

Optimization Configuration of Grid-Connected Inverters to Suppress Harmonic Amplification in a Microgrid

Energies, 2022
This paper provides insight into the optimal configuration scheme of the grid-connected inverters based on harmonic amplification suppression. The connection of the inverters changes the natural resonance frequencies of the grid.
Xing Sun, Wanjun Lei, Yuqi Dai, Yilin Yin, Qian Liu   +4 more
doaj   +1 more source

Vibrational Amplitude Frequency Characteristics Analysis of a Controlled Nonlinear Meso-Scale Beam

Actuators, 2021
Vibration response and amplitude frequency characteristics of a controlled nonlinear meso-scale beam under periodic loading are studied. A method including a general analytical expression for harmonic balance solution to periodic vibration and an updated
Zu-Guang Ying, Yi-Qing Ni
doaj   +1 more source

Microwave Generation of Harmonics in Plasma Resonance

Kakuyūgō kenkyū, 1962
By taking account of plasma oscillations and a spatial variation of electron density and solving the nonlinear Boltzmann and the Poisson equations by the perturbation method, the harmonic components of the distribution function of electrons, the intensity of inner electric field of plasma and the discharge current density are found in the case of ...
Moriyama, M., Sumi, M
openaire   +3 more sources

Design and application of a single‐tuned passive harmonic filter to suppress harmonic distortion and resonance for railway traction power systems—A case study

IET Electrical Systems in Transportation, 2022
The railway traction loads produce massive harmonics that are injected directly into the traction power system. This causes serious waveform distortion in the supply voltage and even invokes a harmonic parallel resonance, which may lead to significant ...
Wei‐Hsiang Ko, Martti Tuomainen
doaj   +1 more source

Imaging in population science: cardiovascular magnetic resonance in 100,000 participants of UK Biobank - rationale, challenges and approaches. [PDF]

, 2013
UK Biobank is a prospective cohort study with 500,000 participants aged 40 to 69. Recently an enhanced imaging study received funding. Cardiovascular magnetic resonance (CMR) will be part of a multi-organ, multi-modality imaging visit in 3-4 dedicated UK
Frank E Rademakers, Steffen E Petersen, Petersen, SE, Rademakers, Frank E., Neubauer, Stefan, Nagel, E, Peakman, T, Sellors, J, Peakman, Tim, Petersen, Steffen E., Rademakers, Frank E, Rademakers, FE, Paul Leeson, Nagel, Eike, Matthews, PM, Young, AA, Tim Peakman, Fabian Bamberg, Plein, S, Friedrich, MG, Young, Alistair A, Young, Alistair, Steve Garratt, Jane M Francis, Sven Plein, Francis, Jane M., Rory Collins, Friedrich, Matthias G, Plein, Sven, Bluemke, David A., Young, Alistair A., Alistair A Young, Jonathan Sellors, Collins, Rory, Leeson, Paul, Francis, JM, Bamberg, F, David A Bluemke, Collins, R, Francis, Jane M, Garratt, Steve, Paul M Matthews, Bluemke, David A, Matthews, Paul M, Matthias G Friedrich, Friedrich, Matthias G., Sellors, Jonathan, Bluemke, DA, Garratt, S, Matthews, Paul M., Neubauer, S, Bamberg, Fabian, Petersen, Steffen E, Eike Nagel, Stefan Neubauer, Leeson, P   +55 more
core   +1 more source

A system-level harmonic mitigation method for HVDC systems – A practical case study

International Journal of Electrical Power & Energy Systems
In recent years, non-characteristic harmonic resonance was observed in several high-voltage direct current (HVDC) systems in China. Intuitively, additional filters can be installed to mitigate the resonance.
Yang Wang, Kun Song, Jinshuai Zhao, Xianyong Xiao, Ying Wang   +4 more
doaj   +1 more source

European Standard Clinical Practice Guideline and EXPeRT Recommendations for the Diagnosis and Management of Gastroenteropancreatic Neuroendocrine Neoplasms in Children and Adolescents

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen, Calogero Virgone, Antje Redlich, Michael Abele, Ricardo Lopez‐Almaraz, Tal Ben‐Ami, Ewa Bien, Gianni Bisogno, Maja Mazic Cesen, Andrea Ferrari, Malgorzata A. Krawczyk, Yves Reguerre, Dominik T. Schneider, Ines B. Brecht, Charlotte Rigaud, Bilgehan Yalcin, Rainer Claus, Christian Vokuhl, Constantin Lapa, Jörg Fuchs, Segolene Hescot, Thomas Walter, Julien Hadoux, Daniel Orbach   +23 more
wiley   +1 more source

Harmonic impedance optimization scheme for multi‐resonance systems to suppress resonance

IET Generation, Transmission & Distribution
Harmonic resonance is caused by harmonic source matching resonance frequency and presents the characteristics of decentralization and whole network in modern grids.
Xing Sun, Wanjun Lei, Yuqi Dai, Lizi Deng, Xiaotong Zhang, Linqiang Hu, Qian Liu   +6 more
doaj   +1 more source

Investigation of the Influence of Splitter Blades on the Resonance Conditions of Impellers

Applied Sciences, 2019
The conventional resonance conditions are derived based on the conventionally designed impellers without splitter blades. This paper proposes the resonance conditions for impellers under the excitation from the impeller−diffuser interaction with ...
Kaicheng Liu, Cheng Yan
doaj   +1 more source