Results 71 to 80 of about 351,312 (306)

Diagnosis and recognition of vibration interference in distributed laser methane detection system

open access: yesGong-kuang zidonghua, 2018
In order to eliminate influences of external vibration on distributed laser methane detection system, based on analysis of frequency characteristics of vibration waveform and influences of vibration on physical properties of fiber and methane detection ...
GUO Qinghua
doaj   +1 more source

Advancing Research on Biomaterials and Biological Materials with Scanning Electron Microscopy under Environmental and Low Vacuum Conditions

open access: yesAdvanced Engineering Materials, EarlyView.
Herein, environmental scanning electron microscopy (ESEM) is discussed as a powerful extension of conventional SEM for life sciences. By combining high‐resolution imaging with variable pressure and humidity, ESEM allows the analysis of untreated biological materials, supports in situ monitoring of hydration‐driven changes, and advances the functional ...
Jendrian Riedel   +6 more
wiley   +1 more source

An Experimental Study on Vibration Signatures for Detecting Incipient Cavitation in Centrifugal Pumps Based on Envelope Spectrum Analysis

open access: yesJournal of Applied Fluid Mechanics, 2019
Vibration signatures have been studied for monitoring the condition of centrifugal pumps by many researchers, however, there is limited published information on the application of vibration analysis to incipient pump cavitation. The paper will review the
A. R. Al-Obaidi, H. Towsyfyan
doaj  

Increment in information and algorithmization of current spectrum tolerance control for rotary machine [PDF]

open access: yes, 2010
This study shows that while diagnostic estimation of shaft movement asynchronous and noise components of vibration signal acts like restrictions decreasing reliability of measuring information.
Shantyr, A., Shantyr, S.
core  

Rheocasting versus Die Casting: An Insight into the Low‐Cycle Fatigue Behavior of AlSi7Mg0.6

open access: yesAdvanced Engineering Materials, EarlyView.
The study compares rheocast lightweight components with high‐pressure die cast materials regarding microstructure and fatigue behavior. Rheocast process offers higher efficiency due to lower casting temperatures. Despite some microstructural differences, both processes show similar strengths (yield strength 125 MPa, tensile strength 240 MPa).
Julia Richter   +4 more
wiley   +1 more source

A novel nonlinear approach to suppress resonant vibrations [PDF]

open access: yes, 2007
A novel approach to suppress resonant vibration is presented by employing a single degree of freedom transmissibility system which utilizes a nonlinear damping element. Studies have shown that the nonlinear damping element can reduce the output energy at
Billings, S.A.   +3 more
core   +1 more source

Background free CARS imaging by phase sensitive heterodyne CARS [PDF]

open access: yes, 2008
In this article we show that heterodyne CARS, based on a controlled and stable phase-preserving chain, can be used to measure amplitude and phase information of molecular vibration modes.
Herek, J.L.   +4 more
core   +3 more sources

Can Ti‐Based MXenes Serve as Solid Lubricants for Brake Applications? A Tribological Study

open access: yesAdvanced Engineering Materials, EarlyView.
This study explores the first implementation of Ti‐based MXenes materials in brake pad friction composite material. The resulting composite material exhibits a 48% reduction in the wear rate; alongside significant improvements are observed for thermal and mechanical properties.
Eslam Mahmoud   +7 more
wiley   +1 more source

A Vibration Analysis Based on Wavelet Entropy Method of a Scroll Compressor

open access: yesEntropy, 2015
Vibration-based condition monitoring and fault diagnosis is an effective approach to maintain the reliable operation of a scroll compressor. Unfortunately, the vibration signal from the scroll compressor always has characteristics of being non-linear and
Tao Liu, Zaixin Wu
doaj   +1 more source

An Experimental Approach on Beating in Vibration Due to Rotational Unbalance

open access: yesApplied Sciences, 2020
This paper proposes a study in theoretical and experimental terms focused on the vibration beating phenomenon produced in particular circumstances: the addition of vibrations generated by two rotating unbalanced shafts placed inside a lathe headstock ...
Dragos-Florin Chitariu   +5 more
doaj   +1 more source

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