Results 101 to 110 of about 6,504,090 (283)

Mitigating flow induced vibration in heater radiant coil

Oil & Gas Science and Technology, 2018
Vibration of process heater tubes in a fired heater can cause fretting-wear damage of the tubes at the locations of contact points with the supports.
Firmansyah Tommy, Rakib Mohammad Abdur, Karakaya Mustafa, Al Musharfy Mohamed, Suleiman Mabruk Issa   +4 more
doaj   +1 more source

Electrically Induced Phase Transition and Synaptic Functionality in MoTe2/Graphene Memristors

Advanced Functional Materials, EarlyView.
An electrically induced reversible 2H ↔ 1T′ phase transition is demonstrated in a vertical Au/Ti/MoTe2/graphene memristor with a laterally contacted graphene electrode. Resistive switching proceeds through a compositionally invariant amorphous/2H ↔ amorphous/1T′ transformation, in which a self‐formed amorphous MoTe2 interfacial region is proposed to ...
Chien‐Hua Wang, Mu‐Pai Lee, Jhen‐Dong Tsai, Liang‐Ying Hsieh, Jui‐Yuan Chen, Chun‐Wei Huang, Yen‐Fu Lin, Wen‐Wei Wu   +7 more
wiley   +1 more source

An Experimental Study on Vortex-Induced Vibration Suppression of a Long Flexible Catenary Cable by Using Vibration Dampers

Journal of Marine Science and Engineering
In this paper, an experimental study is conducted to investigate the effectiveness of vibration dampers in suppressing vortex-induced vibration in a long, flexible catenary cable with a low mass ratio.
Li Ruan, Hongzhong Zhu, Changhong Hu
doaj   +1 more source

Designing Vanadium‐Based Oxide Electrocatalysts for Water Splitting: Experimental and Mechanistic Insights with Machine Learning

Advanced Functional Materials, EarlyView.
This review establishes structure‐property‐mechanism relationships across six modification strategies for V‐based oxide water‐splitting electrocatalysts: lattice engineering, heteroatom doping, interface engineering, carbon‐based hybridization, morphology engineering, and surface reconstruction and pre‐catalyst design, where dissolution is reframed as ...
Youness El Issmaeli, Amina Lahrichi, Hoje Chun, Rafael Gómez‐Bombarelli, Bruno G. Pollet   +4 more
wiley   +1 more source

Electron‐Deficient Linkers Enhance H2O2 Electrosynthesis in Covalent Organic Frameworks

Advanced Functional Materials, EarlyView.
Linker π‐conjugation modulates the electronic state of the Ni–N4 centers and their interaction with the key *OOH intermediate while preserving the primary coordination motif. NiPc‐PTDA delivers an H2O2 selectivity of 92% and a production rate of 34.8 mol gcat−1 h−1, highlighting linker electronic properties as a molecular design parameter for NiPc ...
Houting Xie, Rui Guo, Zhen Liu, Yang Hu, Laichun Zhao, Omid Mazaheri, Bufeng Zhang, Shuaijun Pan   +7 more
wiley   +1 more source

Modal Characteristics of a Wedge Throttle Valve System for Ultra-Deep Well Control

Shiyou jixie
Wedge throttle valve is a key component of choke manifold in modern drilling engineering. Its vibration characteristics are affected by the solid structure itself and also by the coupling of flow-field factors such as fluid pressure and flow rate.
Zhao Mifeng, Feng Shaobo, Xie Junfeng, Zhao Zaipeng, Gao Fumin   +4 more
doaj  

Decoupling the Size and Loading Effects in Silver Nanoparticles for Efficient Paired Carbon Dioxide and Formaldehyde Electrolysis

Advanced Functional Materials, EarlyView.
We investigate size‐dependent CO selectivity on Ag nanoparticles, where optimized Ag loading achieves nearly 100% Faradaic Efficiency for CO at −100 mA·cm−2. In situ SERS and XPS reveal the crucial role of optimized loading in catalytic performance. The Ag/C catalyst further exhibits bifunctional activity, enabling efficient electrolysis of CO2 and ...
Venkata S. R. K. Tandava, Clara Große, Debabrata Bagchi, Zhenye Zhu, Suptish Ghosh, J. Niklas Hausmann, Carsten Walter, Rosario Suarez Anzorena, Catalina Elena Jimenez, Yasmin Lucero Cobos‐Becerra, Jack C. Q. Fletcher, Tobias Sontheimer, Michael Schwarze, Holger Dau, Matthias Driess, Marcus Bär, Prashanth W. Menezes   +16 more
wiley   +1 more source

Stereometric Molecular Engineering for Ultra‐Stable Aqueous Zinc‐Ion Batteries

Advanced Functional Materials, EarlyView.
Stereochemical configuration of molecular additives greatly influences interfacial adsorption at the Zn surface. The optimal tilted dual‐anchored adsorption geometry of myo‐inositol constructs a water‐deficient interface and regulates the solvation structure.
Cunxin Liu, Peng Yang, Mohamed H. Helal, Jiang Zhou, Eero Kontturi   +4 more
wiley   +1 more source

Study of the oscillation process and the wake resulting from the accelerated flow over two free-to-rotate tandem cylinders and the effect of a perturbation applied on the flow

, 2022
Habowski, Patrick Batista, Fiorot, Guilherme Henrique, Moller, Sergio Vicosa, Neumeister, Roberta Fátima   +3 more
core   +1 more source

Flow-Induced Vibration Stability in Pilot-Operated Control Valves with Nonlinear Fluid–Structure Interaction Analysis

Actuators
Control valves in nuclear systems operate under high-pressure differentials generating intense transient fluid forces that induce destructive structural vibrations, risking resonance and the valve stem fracture.
Lingxia Yang, Shuxun Li, Jianjun Hou
doaj   +1 more source