Results 91 to 100 of about 77,563 (254)

Analysis of Generalized Self-Excited Vibrations

Engineering Transactions, 1994
The asymptotic nonlinear method is applied to salve the generalized equation of the self-excited vibration. In the last several decades, increased interest in the study of asymptotic analysis is observed, based mainly on application of the exact ...
K. Wernerowski
doaj  

Experiences with nonsynchronous forced vibration in centrifugal compressors [PDF]

The high subsynchronous vibrations which are often forced vibrations caused by flow instabilities, such as stage stall were examined. Modifications to improve the rotor stability by changing the bearings or seals have little effects on the subsynchronous
Smith, D. R., Wachel, J. C.
core   +1 more source

Calculation of excited polaron states in the Holstein model

, 2003
An exact diagonalization technique is used to investigate the low-lying excited polaron states in the Holstein model for the infinite one-dimensional lattice.
A.H. Castro Neto, A.H. Romero, A.S. Alexandrov, A.S. Alexandrov, A.S. Alexandrov, A.S. Mishchenko, A.S. Mishchenko, C. Zhang, D. Feinberg, D.W. Brown, E. Dagotto, E.V.L. de Mello, E.V.L. de Mello, G. Kalosakas, G. Wellein, G. Wellein, G. Whitfield, H. Fehske, H. Haken, J. Bonča, J. Ranninger, J.M. Robin, J.M. Robin, L. Proville, L.-C. Ku, L.D. Landau, M. Capone, M. Hoffmann, N.K. Voulgarakis, N.V. Prokof’ev, O. S. Barišić, O.S. Barišić, P.B. Shaw, P.E. Kornilovitch, P.F. Maldague, S. Ciuchi, S. Ciuchi, S. El Shawish, S. Engelsberg, S. Fratini, S.I. Pekar, S.I. Pekar, T. Holstein, T. Holstein, T.D. Holstein, V.I. Mel’nikov, V.V. Kabanov, Y. Zhao   +47 more
core   +1 more source

Molecularly Engineered Highly Stable Memristors with Ultra‐Low Operational Voltage: Integrating Synthetic DNA with Quasi‐2D Perovskites

Advanced Functional Materials, EarlyView.
Molecularly engineered memristors integrating Ag nanoparticle–embedded synthetic DNA with quasi‐2D halide perovskites enable ultra‐low‐operational voltage, forming‐free resistive switching, and record‐low power density. This synergistic integration of customized DNA and 2D OHP in bio‐hybrid architecture enhances charge transport, reduces variability ...
Kavya S. Keremane, Abhinav Gorthy, Luyao Zheng, Chiranth C Ravi, Haodong Wu, Jiamao Zheng, Neela H. Yennawar, Shashank Priya, Rashmi Jha, Bed Poudel   +9 more
wiley   +1 more source

Research on the ditching resistance reduction of self-excited vibrations ditching device based on MBD-DEM coupling simulation

Frontiers in Plant Science
In plant horticulture, furrow fertilizing is a common method to promote plant nutrient absorption and to effectively avoid fertilizer waste. Considering the high resistance caused by soil compaction in southern orchards, an energy-saving ditching device ...
Ye Zeng, Ye Zeng, Jun Li, Jun Li, Jun Li, Hongcai Li, Qianqian Zhang, Can Li, Zhao Li, Runpeng Jiang, Chaodong Mai, Zhe Ma, Hongwei He   +12 more
doaj   +1 more source

Internal hysteresis experienced on a high pressure syn gas compressor [PDF]

A vibration instability phenomenon experienced in operating high pressure syn gas centrifugal compressors in two ammonia plants is described. The compressors were monitored by orbit and spectrum analysis for changes from baseline readings.
Zeidan, F. Y.
core   +1 more source

4D‐Printed Magneto‐Plasmonic Microrobots for Programmable Spatiotemporal De‐Icing

Advanced Functional Materials, EarlyView.
A 4D‐printing strategy is introduced to achieve programmable de‐icing devices. By aligning gold–magnetite nanofillers within a photosensitive resin, the printed structures exhibit dual magnetic and plasmonic functionalities, enabling precise spatio‐temporal ice removal through thermoplasmonic effects.
Amélie Pérot, Andrea Cosola, Eléonore Aïdonidis, Jérôme Fresnais, Clément Sanchez, Philippe Belleville, Giancarlo Rizza, Marco Faustini   +7 more
wiley   +1 more source

Complexation‐Mediated Diffusion‐Limited Crystal Growth: A General Framework for Anisotropic Crystal Growth in Cu‐Based Perovskites

Advanced Functional Materials, EarlyView.
A Complexation‐Mediated Diffusion‐Limited Growth (CMDLG) framework is established to rationalize the anisotropic growth of lead‐free perovskites. Integrating coordination chemistry with mass transport kinetics, this study theoretically derives and experimentally validates that stable iodocuprate complexes induce a diffusion‐limited regime.
Hyunmin Lee, Mu Geun Son, Thanh Van Vu, Hokyeong Jeong, Joonhee Kang, Youngjong Kang   +5 more
wiley   +1 more source

Physical mechanism of ice/structure interaction

Journal of Glaciology, 2018
To obtain the effect of velocity and structural natural frequency (structural stiffness) on ice failure, an extended dynamic Van der Pol-based single degree-of-freedom ice/structure interaction model is developed.
XU JI, ERKAN OTERKUS
doaj   +1 more source

New model for vortex-induced vibration of catenary riser [PDF]

, 2008
This paper presents a new theoretical model capable of predicting the vortex-induced vibration response of a steel catenary riser subject to a steady uniform current.
O'Brien, P., Srinil, N., Wiercigrocha, M.   +2 more
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