Results 11 to 20 of about 1,373,655 (201)

Δ-excitations and the three-nucleon force [PDF]

Nuclear Physics A, 2008
We study the three-nucleon force in chiral effective field theory with explicit Delta-resonance degrees of freedom. We show that up to next-to-next-to-leading order, the only contribution to the isospin symmetric three-nucleon force involving the spin-3/2 degrees of freedom is given by the two-pion-exchange diagram with an intermediate delta ...
Epelbaum, E., Krebs, H., Meissner, U.G.
openaire   +3 more sources

Research on active control method of rotor blade synchronous vibration based on additional secondary excitation forces

Journal of Low Frequency Noise, Vibration and Active Control, 2021
In this paper, a synchronous vibration control method was proposed to avoid the high-cycle fatigue fracture of aeroengine rotor blade. Firstly. The harmonic force, causing synchronous vibration, was derived by Fourier series expansion by the mean of ...
Sanqun Ren, Xiaorong Xiang, Qingjun Zhao, Weimin Wang, Wei Zhao, Long Hao   +5 more
doaj   +1 more source

Band excitation Kelvin probe force microscopy utilizing photothermal excitation [PDF]

Applied Physics Letters, 2015
A multifrequency open loop Kelvin probe force microscopy (KPFM) approach utilizing photothermal as opposed to electrical excitation is developed. Photothermal band excitation (PthBE)-KPFM is implemented here in a grid mode on a model test sample comprising a metal-insulator junction with local charge-patterned regions.
Liam Collins, Stephen Jesse, Nina Balke, Brian J. Rodriguez, Sergei Kalinin, Qian Li   +5 more
openaire   +3 more sources

DECREASE OF DYNAMIC STRESSES LEVEL IN ROTOR BLADES OF THE TURBINE AT THE EXPENSE OF A OPTIMISATION OF NOZZLE VANES GEOMETRY

Авіаційно-космічна техніка та технологія, 2018
Interacting between the next rows of the turbine creates a circumferential flow non-uniformity, which leads to origination of resonance dynamic stresses on rotor bladings with frequencies z·fn, where fn - a rotor rotation frequency, z - number of stator ...
Юрий Петрович Кухтин, Петр Петрович Варварук, Вячеслав Михайлович Меркулов   +2 more
doaj   +1 more source

2022 Annual Meeting of the Belgian Society of Radiology (BRS) – Young Radiologist Section (YRS)

Journal of the Belgian Society of Radiology, 2022
The annual meeting of the Belgian Society of Radiology (BSR) will take place on the 19th of November in the heart of Brussels at Passage 44. For the 8th time the BSR and the Young Radiologist Section (YRS) of the BSR are joining forces to organize an ...
Michiel Van Elsen, Axel Boyer, Flavien Grandjean, Stijn Marcelis   +3 more
doaj   +1 more source

Forced-self-excited system of iced transmission lines under planar harmonic excitations [PDF]

Nonlinear Dynamics, 2021
Abstract This paper is concerned with the analysis of the self-excited vibrations and forced vibrations of the iced transmission lines. By introducing the external excitation load, the effect of dynamic wind on the nonlinear vibration equations of motion is reflected by vertical aerodynamic force. The approximate analytical solution of the non-
Xiaohui Liu, Shuguang Yang, Guangyun Min, Ceshi Sun, Haobo Liang, Ming Zou, Chuan Wu, Mengqi Cai   +7 more
openaire   +1 more source

Optimal exciting motion for fast robot identification. Application to contact painting tasks with estimated external forces

Robotics Auton. Syst., 2019
Accurate geometric and inertial parameter estimates of a modern manipulator are of crucial importance to obtain good performances during a contact task or for obtaining more and more required realistic simulations.
Takuma Katsumata, B. Navarro, V. Bonnet, P. Fraisse, A. Crosnier, G. Venture   +5 more
semanticscholar   +1 more source

Study on dynamic characteristics of leaf spring system in vibration screen

Journal of Low Frequency Noise, Vibration and Active Control, 2021
By studying dynamic characteristics of the leaf spring system, a new elastic component is designed to reduce the working load and to a certain extent to ensure the linearity as well as increase the amplitude in the vertical and horizontal directions in ...
Jiacheng Zhou, Chao Hu, Ziqiu Wang, Zhengfa Ren, Xiaoyu Wang, Kuanmin Mao   +5 more
doaj   +1 more source

Numerical analysis of unsteady hydrodynamic performance of pump-jet propulsor in oblique flow

International Journal of Naval Architecture and Ocean Engineering, 2020
In this study, the SST k−ω turbulence model and the sliding mesh technology based on RANS method have been adopted to simulate the exciting force and hydrodynamic of a pump-jet propulsor in different oblique inflow angle (0°, 10°, 20°, 30°) and different
Chengcheng Qiu, Guang Pan, Qiaogao Huang, Yao Shi   +3 more
doaj   +1 more source

Numerical Simulation of Section Systems in the Pelamis Wave Energy Converter

Advances in Mechanical Engineering, 2013
The working principle of the Pelamis wave energy converter is described in this paper. The sectional size suitable for the outside sea of Xiamen Bay is redesigned according to the Froude and Strouhal similarity criteria.
Hongzhou He, Quanyou Qu, Juyue Li
doaj   +1 more source