Results 31 to 40 of about 153,861 (268)

Research on Micro-CL Geometric Errors [PDF]

IEEE Access
Computed laminography (CL) is a nondestructive testing technique for planar objects. It has been applied in applications like printed circuit board inspection and paleontological fossils research. However, the CL system calibration is a challenging task for complex mechanical structure and many degrees of freedom.
Jiajun Zhang, Liu Shi, Cunfeng Wei, Baodong Liu, Biao Wei   +4 more
openaire   +1 more source

Investigation of the Contact Characteristics of a Single-Nut Ball Screw Considering Geometric Errors

Lubricants
As the critical performance index of ball screws, the contact characteristics have a significant influence on the lubricant properties, tribological properties, and wear properties of ball screws, which further directly affect the service life of ball ...
Jun Liu, Huaxi Zhou, Xiaoyi Wang, Changguang Zhou   +3 more
doaj   +1 more source

A mapping model between the workpiece geometric tolerance and the end pose error of CNC machine tool considering structure distortion of cutting process system

Advances in Mechanical Engineering, 2021
Aiming at the problem that the geometric accuracy design index of machine tools is difficult to be determined reasonably in the geometric precision design process of CNC machine tools, this paper presents a mapping model between geometric tolerance of ...
Zixin Lin, Wenjie Tian, Dawei Zhang, Weiguo Gao, Lina Wang   +4 more
doaj   +1 more source

Selective polishing method to increase precision in large format lightweight machine tools working with petrous material

Revista Facultad de Ingeniería Universidad de Antioquia, 2019
In this article two complementary methods are developed. Firstly, a method to add precision in large machine tools with modular lightweight structures (APLM), which performs the compensation of geometrics and dynamics errors using embedded intelligence,
Orlando de Jesús Copete-Murillo, Iván Darío Arango-López   +1 more
doaj   +1 more source

Modeling of CNC machine tools’ spatial geometric error based on two-dimensional angle error

SN Applied Sciences, 2022
A modeling method of CNC machine tools’ spatial geometric error is proposed based on two-dimensional angle error in this paper. Different from traditional modeling method, this method takes into account the effect of additional angle errors because the ...
Xiuqin Zhang, Guohua Chen, Lin Zhang, Yongwen Hu, Jie Mao, Zhiyang Zhang   +5 more
doaj   +1 more source

Transferrin receptor 1‐mediated iron uptake supports thermogenic activation in human cervical‐derived adipocytes

FEBS Letters, EarlyView.
In this study, we found that human cervical‐derived adipocytes maintain intracellular iron level by regulating the expression of iron transport‐related proteins during adrenergic stimulation. Melanotransferrin is predicted to interact with transferrin receptor 1 based on in silico analysis.
Rahaf Alrifai, Mizuki Seo, Gyath Karadsheh, Fachrur Rizal Mahendra, Máté Á Demény, Ferenc Győry, János András Mótyán, László Fésüs, Endre Kristóf, Rini Arianti   +9 more
wiley   +1 more source

Calpain small subunit homodimerization is robust and calcium‐independent

FEBS Letters, EarlyView.
Calpains dimerize via penta‐EF‐hand (PEF) domains. Using single‐molecule force spectroscopy, we measured the strength and kinetics of PEF–PEF homodimer binding. The interaction is robust, shows a transient conformational step before dissociation, and remains largely insensitive to Ca2+.
Nesha May O. Andoy, Trina Dykstra‐MacPherson, Mathias A. Bell, Peter L. Davies, Ruby May A. Sullan   +4 more
wiley   +1 more source

Measurement Method of Geometric Error of Coordinate Measuring Machine Using Laser Tracer

工程科学与技术, 2021
Geometric error is an important error source of coordinate measuring machine (CMM). The geometric error measurement methods currently used have the problems of low efficiency and low accuracy, which seriously deteriorate the further improvement of the ...
Lin HAN, Liang MI, Xingbao LIU, Qiang TENG, Qiang TANG, Yangqiu XIA   +5 more
doaj  

Prediction of the Comprehensive Error Field in the Machining Space of the Five-Axis Machine Tool Based on the “S”-Shaped Specimen Family

Machines, 2022
In order to quickly and accurately predict the spatial geometric error field of the five-axis machine tool processing, a method for predicting the comprehensive error field of the five-axis machine tool processing space based on the “S”-shaped specimen ...
Shi Wu, Zeyu Dong, Fei Qi, Zhendong Fan
doaj   +1 more source

An unexpected alternative viologen electron mediator site in tungsten‐containing formate dehydrogenase

FEBS Letters, EarlyView.
An unexpected alternative interaction site for ethyl viologen was identified in formate dehydrogenase 1 from Methylorubrum extorquens. Combined mutagenesis, kinetic analysis, and docking revealed that aromatic residues near an iron–sulfur cluster enable flavin mononucleotide‐independent electron transfer, offering a framework for engineering improved ...
Eleni G. Poloniataki, Yong Hwan Kim
wiley   +1 more source