Results 21 to 30 of about 37,684 (309)

Various Dereplication Strategies Using LC-MS for Rapid Natural Product Lead Identification and Drug Discovery

open access: yesNatural Product Communications, 2007
Natural products are the most consistently successful source of drug leads. The rapid identification of known compounds from natural product extracts, or ‘dereplication’, is an important step in an efficiently run drug discovery program.
Koneni V Sashidhara   +1 more
doaj   +1 more source

Ensemble-Based Semi-Supervised Learning for Milling Chatter Detection

open access: yesMachines, 2022
Chatter is one of the most deleterious phenomena during the machining process, and leads to a low quality of workpiece surface, a noisy workplace, and decreases in tool and machine life.
Weichao Liu, Pengyu Wang, Youpeng You
doaj   +1 more source

Improving generalisation and accuracy of on-line milling chatter detection via a novel hybrid deep convolutional neural network [PDF]

open access: yes, 2023
Unstable chatter seriously reduces the quality of machined workpiece and machining efficiency. In order to improve productivity, on-line chatter detection has attracted much interest in the past decades.
Liao, Zhirong   +13 more
core   +2 more sources

On the stability of high-speed milling with spindle speed variation [PDF]

open access: yes, 2010
Spindle speed variation is a well-known technique to suppress regenerative machine tool vibrations, but it is usually considered to be effective only for low spindle speeds.
Arnaud, Lionel   +4 more
core   +1 more source

The Bivariate Empirical Mode Decomposition and Its Contribution to Grinding Chatter Detection

open access: yesApplied Sciences, 2017
Grinding chatter reduces the long-term reliability of grinding machines. Detecting the negative effects of chatter requires improved chatter detection techniques.
Huanguo Chen   +6 more
doaj   +1 more source

Chatter milling modeling of active magnetic bearing spindle in high-speed domain [PDF]

open access: yes, 2011
A new dynamical modeling of Active Magnetic Bearing Spindle (AMBS) to identify machining stability of High Speed Milling (HSM) is presented. This original modeling includes all the minimum required parameters for stability analysis of AMBS machining. The
Arnaud, Lionel   +5 more
core   +1 more source

Hardware-in-the-loop simulator for emulation and active control of chatter

open access: yesHardwareX, 2022
Machine tool cutting performance is limited by the onset of regenerative chatter vibrations. Chatter damages the machine tool system and must be avoided. Efficacy of models guiding circumvention of chatter in actual industrial contexts remains restricted
Govind N. Sahu, Mohit Law
doaj   +1 more source

Vibration Control Using Multilayer Piezoelectric Actuators: Towards Chatter Supression in Turning Operations [PDF]

open access: yesMaterials Research, 2020
Chatter causes poor surface quality and damage to tools in machining. Therefore, strategies for chatter monitoring and reduction are constantly under investigation.
Giuliana Sardi Venter   +1 more
doaj   +1 more source

Chatter Identification of Face Milling Operation via Time-Frequency and Fourier Analysis

open access: yesInternational Journal of Automation and Smart Technology, 2016
Chatter is generally defined as self-generated vibrations from the interaction between tool and workpiece.  It is the most critical vibration in machining operations and can decrease the surface quality and cause the premature tool wear.
Ching-Chih Wei   +2 more
doaj   +1 more source

In-Process Chatter Detection in Surface Grinding

open access: yesMATEC Web of Conferences, 2015
The chatter causes the poor surface finish during the surface grinding. It is therefore necessary to monitor the chatter during the process. Hence, this research has proposed the in-process chatter detection in the surface grinding process by utilizing ...
Tangjitsitcharoen Somkiat   +1 more
doaj   +1 more source

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