Results 111 to 120 of about 55,529 (261)

Analysis on Downhole High-Frequency Torsional Oscillation of Bottom Hole Assembly

Shiyou jixie, 2022
High-frequency torsional oscillation(HFTO)has seriously affects the safety and reliability of drilling tools.In order to clarify the mechanism of HFTO and formulate a reasonable and reliable vibration reduction strategy,the data collected from the new ...
Xie Xue, Zhang Tao, Lin Zili, Xu Chaohui, Li Yumei, Guo He   +5 more
doaj  

Toward Fast Proton Shuttling in Acidic Oxygen Evolution Reaction

Advanced Functional Materials, EarlyView.
This review establishes proton transfer dynamics as a descriptor governing acidic OER activity, moving beyond the kinetic constraints derived from the proton coupled electron transfer. We discuss how deprotonation governs classical mechanisms, including adsorbate evolution mechanism (AEM), lattice oxygen mechanism (LOM) and oxide path mechanism (OPM ...
Ashish Gaur, Jaeyeong Kim, Sungwook Mhin, HyukSu Han   +3 more
wiley   +1 more source

Volume delivery during high frequency oscillation

, 1998
AIM: To examine the delivered volume during "high volume strategy" high frequency oscillation, used as rescue treatment in preterm infants; and to identify factors, other than frequency and oscillatory amplitude, influencing the magnitude of volume ...
Milner, A. D., Laubscher, B., Kavvadia, V., Dimitriou, G., Greenough, A.   +4 more
core   +1 more source

Bacterial‐Electrochemical Platform Utilizing a MXene‐Peptide Hydrogel

Advanced Functional Materials, EarlyView.
A peptide‐based fibrillar hydrogel incorporating MXene facilitates efficient electron delivery to intracellular recombinant [FeFe]‐hydrogenase enzyme in E. coli, enabling sustained bioelectrochemical H2 production without engineered exoelectrogenicity pathways.
Oren Ben‐Zvi, Itzhak Grinberg, Or Messer, Dana Cohen‐Gerassi, Maxim Sokol, Iftach Yacoby, Lihi Adler‐Abramovich   +6 more
wiley   +1 more source

Cascaded-Filter-Based Reverberation Suppression Method of Short-Pulse Continuous Wave for Active Sonar

Remote Sensing
Reverberation is the main background interference in active sonar and seriously interferes with the extraction of the target echo. Active sonar systems can use short-pulse continuous wave (CW) signals to reduce the reverberation intensity.
Yonglin Cui, Shuhan Liao, Juncheng Gao, Haidong Zhu, Nengtong Zhao, An Luo   +5 more
doaj   +1 more source

Stability Mechanism Analysis of Traction Power System and Traction Drive System

机车电传动, 2021
In view of the frequent occurrence of tripping in a domestic passenger dedicated line traction substation, which brought safety hazards to the normal operation of the power supply system and the high-speed trains.
Huazhi ZHANG, Jun HUANG, Bo ZHAN, Jie WU, Wensheng SONG   +4 more
doaj  

Electrocapillary Modulated Interfacial Tension Amplifies Liquid Metal Transduction

Advanced Functional Materials, EarlyView.
This study presented an electrocapillary‐enhanced magnetohydrodynamic pumping strategy that harnesses the Lorentz force and interfacial tension modulation of liquid metal droplets to achieve amplified fluidic power. The system enabled low‐voltage, self‐oscillating fluidic transduction with enhanced pressure and flow generation, supporting compact ...
Saba Firouznia, Ciqun Xu, Michael D. Dickey, Jonathan Rossiter   +3 more
wiley   +1 more source

On the magnetospheric beat-frequency and lense-thirring interpretations of the horizontal-branch oscillation in the Z sources

, 1999
Three types of quasi-periodic oscillations (QPOs) have been discovered so far in the persistent emission of the most luminous neutron star low-mass X-ray binaries, the Z sources: similar to 10-60 Hz horizontal-branch and similar to 6-20 Hz normal/flaring-
van Paradijs, J, van Paradijs, J.A., Psaltis, D., Lewin, WHG, Lamb, FK, Jonker, PG, Jonker, P.G., Miller, MC, van der Klis, M., Homan, J, Psaltis, D, Kuulkers, E, Miller, C., Wijnands, Rudy Adam Dirk, van der Klis, M, Lewin, W.H.G., Homan, J., Kuulkers, E., Wijnands, R.A.D., Lamb, F.K.   +19 more
core   +1 more source

Microstructure and properties of steel/aluminum laser welded joints based on 8-shaped oscillation

Hanjie xuebao
The laser lap welding experiment of steel on aluminum alloys was carried out by using the 8-shaped oscillation mode. Metallographic microscope, scanning electron microscope and electronic universal testing machine were used to analyze the influence of ...
Tian LI, Youruiling YAN, Mingjun ZHANG, Yuemin ZHANG   +3 more
doaj   +1 more source

High-Frequency Oscillations

Abstract This chapter focuses on high frequency oscillations (HFOs), which are also known as transient oscillations in the broad 80 to 6000 Hz frequency range. HFOs typically represent a normal physiological activity and pathological phenomenon found in epileptic tissue.
Liset Menendez de la Prida, Jean Gotman
openaire   +1 more source