Results 61 to 70 of about 175,360,748 (298)

Investigation on the Dynamic Characteristics of a New High-Pressure Water Hydraulic Flow Control Valve

Machines
Water has the disadvantages of low viscosity, poor lubrication, and easy leakage, which leads to many problems in water hydraulic flow control valves, such as low working pressure and large flow fluctuations.
Wenchao Liu, Jie Tian, Hongyao Wang, Junshi Li, Rulin Zhou, Yu Cao   +5 more
doaj   +1 more source

An alternative solution for patient with high risk of coronary obstruction underwent TAVI procedure using a novel second-generation device – a case series

Journal of Cardiothoracic Surgery, 2019
Background Obstruction of the left or right coronary artery is a rare but lethal complication during transcatheter aortic valve implantation (TAVI). The new J-Valve™ prosthesis is a new second generation TAVI device which has several features to avoid ...
Hong Qian, Yucheng Chen, Zhaoyun Cheng, Yingqiang Guo   +3 more
doaj   +1 more source

Stabilization of Strongly Reduced Fe(I) Single Atom Species Coordinated in a 2D Self‐Assembled Metal–Organic Network

Advanced Functional Materials, EarlyView.
A graphene‐supported 2D metal–organic network stabilizes highly reactive Fe(I)‐N4 single sites through Co‐induced charge redistribution. Combined experiments and theory reveal Fe(I) formation, oxygen‐driven oxidation, and O2 activation mechanisms, offering a strategy to access low‐valent iron centers relevant to catalytic and biological processes ...
Alessandro Namar, Basant Roondhe, Michela De Col, Stefania Baronio, Matteo Jugovac, Mattia Scardamaglia, Eleanor Frampton, Nikolay Vinogradov, Paolo Giannozzi, Erik Vesselli   +9 more
wiley   +1 more source

Experimental Study and Simulation Analysis on Electromagnetic Characteristics and Dynamic Response of a New Miniature Digital Valve

Advances in Materials Science and Engineering, 2018
In order to get the better electromagnetic characteristics of the micro digital valve, the larger electromagnetic force should be obtained in the smaller electromagnetic structure.
Meisheng Yang, Junhui Zhang, Bing Xu
doaj   +1 more source

Lone‐Pair‐Induced Lattice Distortion in Lead‐Free Hybrid Perovskites for High‐Performance Nanogenerators

Advanced Functional Materials, EarlyView.
A lead‐free tin‐based hybrid perovskite is designed in which stereochemically active lone‐pair electrons on tin distort the crystal lattice and break its symmetry. Blended into a flexible polymer, the material converts pressure into electricity at milliwatt‐scale power density and continues working far below freezing, powering a commercial wristwatch ...
Majid Haji Bagheri, Asif Abdullah Khan, Md Fahim Al Fattah, Mahmoud Almadhoun, Shamaila Shahzadi, Aixi Pan, Md Soyaeb Hasan, Henry Wu, Arash Aghigh, Bhawna Bhawna, François Légaré, Vivek Maheshwari, Dayan Ban   +12 more
wiley   +1 more source

MODIFICATION OF HAND HOLE VALVE IN 10 KG CAPACITY MINI GASIFIER MACHINE

Jurnal Teknik Mesin, 2020
Coal is one of the fossil fuels generally is that sedimentary rocks can ignite, formed from organic deposits. Along with the depletion of reserves of fossil energy sources, there is a coal energy conversion technology that is the gasification process ...
Fachri Koeshardono
doaj   +1 more source

Tantalum–Palladium Ultrathin Resistance Hydrogen Sensor

Advanced Functional Materials, EarlyView.
Nanoconfined Ta‐alloy thin films enable fast, reversible hydrogen sensing by suppressing unwanted phase transitions. A Ta0.88${\rm Ta}_{0.88}$Pd0.12${\rm Pd}_{0.12}$ sensing layer delivers hysteresis‐free detection from ppb to 100% H2${\rm H}_2$ at room temperature.
Folkert Isaäc Bernhard Straus, Herman Schreuders, Lars Johannes Bannenberg   +2 more
wiley   +1 more source

Idle Operation with Low Intake Valve Lift in a Port Fuel Injected Engine [PDF]

, 2013
Reducing fuel consumption is a prime objective in the automotive industry in order to meet regulatory and customer demands. Variable valve actuation offers many opportunities for improving the spark ignition engine’s performance in areas such as fuel ...
CLENCI, Adrian, Georges Descombes, Michael Deligant, PODEVIN, Pierre, NICULESCU, Rodica, DELIGANT, Michael, BIZIAC, Adrian, Rodica Niculescu, Pierre Podevin, DESCOMBES, Georges, Bîzîiac, Adrian, Adrian Bîzîiac, Adrian Clenci   +12 more
core   +1 more source

Analysis on the Performance Improvement of Reciprocating Pump with Variable Stiffness Valve using CFD

Journal of Applied Fluid Mechanics, 2020
As a key component of reciprocating pump, the valve has a significant influence on its performance. However, it is difficult for the existing valve to simultaneously solve the problems such as fatigue, erosion and cavitation in engineering application ...
G. Zhu, S. M. Dong
doaj  

Microfluidic Engineering of Microgels: A Review of Emerging Technologies, Materials, Fabrication Strategies, and Applications

Advanced Healthcare Materials, EarlyView.
Recent advances in microfluidic technologies for microgel fabrication are critically reviewed, highlighting the capabilities and limitations of major microfluidic platforms and discussing how platform design, material selection, and crosslinking strategies influence microgel architecture and functionality. Current challenges and future opportunities in
Afshin Abrishamkar, Laura Neely, Cynthia Pham, Nada Ibrahim, Alexis Larios‐Cervantes, Ben A. Kertesz, Todd Hoare   +6 more
wiley   +1 more source