Results 31 to 40 of about 16,083,913 (302)

Vibration Identification of Folded-MEMS Comb Drive Resonators

open access: yesMicromachines, 2018
Natural frequency and frequency response are two important indicators for the performances of resonant microelectromechanical systems (MEMS) devices.
Jianxin Han   +6 more
doaj   +1 more source

High Speed Blanking: An Experimental Method to Measure Induced Cutting Forces [PDF]

open access: yes, 2013
Lien vers la version éditeur: http://link.springer.com/article/10.1007/s11340-013-9738-1A new blanking process that involves punch speed up to 10 ms −1 has obvious advantages in increased productivity.
LARUE, Arnaud   +5 more
core   +1 more source

Measurement of the Euler Angles of Wurtzitic ZnO by Raman Spectroscopy

open access: yesJournal of Spectroscopy, 2017
A Raman spectroscopy-based step-by-step measuring method of Euler angles φ,θ,and  ψ was presented for the wurtzitic crystal orientation on a microscopic scale.
Wu Liu, Qiu Li, Gang Jin, Wei Qiu
doaj   +1 more source

Qualitative Identification of the Static Pull-In and Fundamental Frequency of One-Electrode MEMS Resonators

open access: yesMicromachines, 2018
This paper attempts to qualitatively identify the static pull-in position, pull-in voltage, and fundamental frequency of one-electrode microresonators from a physical perspective. During theoretical derivation, a generalized one-degree-of-freedom (1-DOF)
Jianxin Han   +6 more
doaj   +1 more source

Design of an active dynamic balancing head for rotor and its balancing error analysis

open access: yesJournal of Advanced Mechanical Design, Systems, and Manufacturing, 2015
The unbalancing vibration monitoring and control of rotating machinery is an important engineering problem. In order to correct the unbalance of rotor system online, an active dynamic balancing head is designed based on the ratchet-pawl mechanism and ...
Zhang SHIHAI, Zhang ZIMIAO
doaj   +1 more source

The Effect Analysis of Carrier Gas Flow Rate on the Rapid Gas Chromatographic Separation System

open access: yesApplied Bionics and Biomechanics, 2020
Odor pollution did not only disturb the human normal life but also aroused the attention of environmental researchers and environmental protection departments.
Xu Zhang   +3 more
doaj   +1 more source

Research on Roughness and Microhardness of C45 Material Using High-Speed Machining

open access: yesApplied Sciences, 2023
From the point of view of production, it is of fundamental importance to know the cutting parameters at which the new surface of the component was created because only in this way is it possible to understand the nature and properties of the created ...
Jan Duplak   +2 more
doaj   +1 more source

A general torsional stiffness estimating approach for geared transmission employed in rotary table of machine tools

open access: yesJournal of Advanced Mechanical Design, Systems, and Manufacturing, 2016
Torsional stiffness of a rotary feed drive system not only has great influence on the rotary positioning accuracy, but also affects the system dynamic characteristics.
Lin HAN, Fujun WANG
doaj   +1 more source

The Impact of High-Speed and Thermal-Assisted Machining on Tool Wear and Surface Roughness during Milling of SKD11 Steel

open access: yesMetals, 2023
This research investigates the impact of high-speed and thermal-assisted machining (HS-TAM) on tool wear and surface roughness during the milling of SKD11 steel. The goal is to identify high-speed and elevated temperature zones that can improve machining
Thi-Bich Mac   +2 more
doaj   +1 more source

Onset and evolution of discontinuously segmented chip flow in ultra-high-speed cutting Ti-6Al-4V [PDF]

open access: yes, 2017
Increasing the cutting speed to an ultra-high level usually gives rise to a chip flow transition from continuously serrated to discontinuously segmented, which is one of the most fundamental and challenging problems in metal cutting.
Ye GG   +4 more
core   +1 more source

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