Results 21 to 30 of about 803,393 (302)

Correction to “An Investigation of the Novel Testing Setup for the Dynamic Characterization of Super High-Pressure High-Speed Switch Valves”

open access: yesIEEE Access, 2021
In the above article [1], the funding information is incorrect and, thus, is modified as in the following paragraph:
Chuan Ding   +4 more
doaj   +1 more source

Shear thickening polishing of the concave surface of high-temperature nickel-based alloy turbine blade

open access: yesJournal of Materials Research and Technology, 2021
High-temperature nickel-based alloy, which is a valuable crucial material for fabricating functional components, is commonly used to fabricate turbine blades. However, the concave surface of the turbine blade is much difficult to be polished.
Qi Shao   +5 more
doaj   +1 more source

Effect of fluid motion on the impact erosion by a micro-particle on quartz crystals

open access: yesAIP Advances, 2016
Abrasive slurry jet (ASJ) is a promising technology to process a variety of materials with advantages of high flexibility, no heat affected zone and high cutting efficiency.
D. H. Cai   +5 more
doaj   +1 more source

The Consensus on Citizenship Education Purposes in Teacher Education [PDF]

open access: yesSocial Sciences, 2021
Although education for democratic citizenship has long been a powerful rationale for social studies education, researchers still report a significant gap between this purpose and what is really taught in classrooms. Explanations of this phenomenon vary, but literature on citizenship education (CE) research has largely interpreted this gap as a result ...
Estelles Frade, Marta   +2 more
openaire   +3 more sources

The Optimal Processing Parameters of Radial Ultrasonic Rolling Electrochemical Micromachining—RSM Approach

open access: yesMicromachines, 2020
Radial ultrasonic rolling electrochemical micromachining (RUR-EMM) is a new method of electrochemical machining (ECM). By feeding small and rotating electrodes aided by ultrasonic rolling, an array of pits can be manufactured, which is called ...
Kailei He, Xia Chen, Minghuan Wang
doaj   +1 more source

Research on the promotion mechanism of surface burnishing process by two-dimensional ultrasonic vibration

open access: yesJournal of Materials Research and Technology, 2021
Tangential ultrasonic vibration and vertical ultrasonic vibration are applied in the surface burnishing process (SBP) to study the improvement mechanism of both on the machining performance.
Zhou Zhen-yu   +5 more
doaj   +1 more source

Jonathan Edwards and a reformational view of the purpose of education

open access: yes, 2016
The contemporary quest for spirituality (or spiritual ‘connection’) in formal education can be linked to the question what education is for. The present article is concerned with contributing to a reformational approach to the question of the purpose of ...
Esmari Potgieter
core   +4 more sources

Optimization of Lapping and Polishing of Steel Samples for Nanoindentation Based on SVM-GA

open access: yesFrontiers in Materials, 2022
The nanoindentation test is extensively used to obtain the mechanics performance of different kinds of materials. In this study, the general process in the lapping and polishing of Q235 steel samples for nanoindentation has been analyzed by considering ...
Zhichao Cheng   +5 more
doaj   +1 more source

Control Mechanism of Particle Flow in the Weak Liquid Metal Flow Field on Non-Uniform Curvature Surface Based on Lippmann Model

open access: yesFrontiers in Materials, 2022
In order to realize the uniform distribution in the abrasive flow polishing of the titanium alloy workpiece with curved surface, a novel method based on the liquid metal-abrasive flow machining technology is proposed in this study.
Li Zhang   +11 more
doaj   +1 more source

Matching Boundary Conditions for the Euler–Bernoulli Beam

open access: yesShock and Vibration, 2021
Artificial boundary conditions play a crucial role in the dynamic simulation of infinite Euler–Bernoulli beams. In this paper, a class of artificial boundary conditions, matching boundary conditions (MBCs), is presented to provide effective absorption of
Yaoqi Feng, Xianming Wang
doaj   +1 more source

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