Results 11 to 20 of about 1,697,500 (308)

Vibration Characteristics of Rotor System with Loose Disc Caused by the Insufficient Interference Force

open access: yesChinese Journal of Mechanical Engineering, 2022
The rotating parts looseness is one of the common failures in rotating machinery. The current researches of looseness fault mainly focus on non-rotating components.
Zhinong Li   +5 more
doaj   +1 more source

Testing Nonassociative Quantum Mechanics

open access: yesPhysical Review Letters, 2015
The familiar concepts of state vectors and operators in quantum mechanics rely on associative products of observables. However, these notions do not apply to some exotic systems such as magnetic monopoles, which have long been known to lead to non-associative algebras. Their quantum physics has remained obscure.
Bojowald, Martin   +2 more
openaire   +4 more sources

Sensing Enhancement of Electromagnetically Induced Transparency Effect in Terahertz Metamaterial by Substrate Etching

open access: yesFrontiers in Physics, 2021
A broad range of terahertz (THz) metamaterials have been developed for refractive index sensing. However, most of these metamaterials barely make sufficient use of the excited electric field which is crucial to achieve high sensitivity. Here, we proposed
Tingling Lin   +7 more
doaj   +1 more source

Precision Extrusion Deposition of Polycaprolactone/Hydroxyapatite Tissue Scaffolds [PDF]

open access: yes, 2006
Freeform fabrication provides an effective process tool to manufacture advanced tissue scaffolds with specific designed properties. Our research focuses on using a novel Precision Extrusion Deposition (PED) process technique to directly fabricate ...
Güçeri, S., Shor, L., Sun, W.
core   +1 more source

Non-Destructive Evaluation of Hidden Defects Beneath the Multilayer Organic Protective Coatings Based on Terahertz Technology

open access: yesFrontiers in Physics, 2021
An organic protective coating system plays an important role for the corrosion protection of offshore metallic structures. It is of practical importance to detect possible coating defects and evaluate coating performance for corrosion degradation ...
Wanli Tu   +3 more
doaj   +1 more source

Bioactive composites for bone tissue engineering [PDF]

open access: yes, 2010
One of the major challenges of bone tissue engineering is the production of a suitable scaffold material. In this review the current composite materials options available are considered covering both the methods of both production and assessing the ...
Tanner, K.E.
core   +1 more source

The thermo-mechanical performance of glass-fibre reinforced Polyamide 66 during glycol-water hydrolysis conditioning [PDF]

open access: yes, 2010
Injection moulded glass-fibre reinforced polyamide 66 composites based on two glass fibre products with different sizing formulations and unreinforced polymer samples have been characterised by dynamic mechanical analysis and unnotched Charpy impact ...
Ali, J.Z., Anderson, J., Thomason, J.L.
core   +1 more source

Surface Texture Measurement on Complex Geometry Using Dual-Scan Positioning Strategy

open access: yesApplied Sciences, 2020
In this paper, a surface measurement method based on dual-scan positioning strategy is presented to address the challenges of irregular surface patterns and complex geometries. A confocal sensor with an internal scanning mechanism was used in this study.
Fang Cheng, Shaowei Fu, Ziran Chen
doaj   +1 more source

Characterization and Evaluation of Rotation Accuracy of Hydrostatic Spindle under the Influence of Unbalance

open access: yesShock and Vibration, 2020
The paper studies the characterization and evaluation technology of rotation accuracy of hydrostatic spindle under the influence of unbalance. The dynamic model of the motion error of the hydrostatic spindle is established based on the dynamic parameters.
Dongju Chen, You Zhao, Jingfang Liu
doaj   +1 more source

Effect of altitude on the emission characteristics of a DI diesel engine [PDF]

open access: yesE3S Web of Conferences, 2021
To evaluate the effects of altitude on common rail electronic-controlled diesel engine, an experiment was carried out on a test bench with the simulated altitude system.
Zhao Wei   +4 more
doaj   +1 more source

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