Results 151 to 160 of about 486,148 (228)

An improved robust identification method for position independent geometric errors of the swing axis of the gear grinding machine

International Journal of Advanced Manufacturing Technology
Guolong Li, Li Guolong, Li Zheyu
exaly   +2 more sources

A five-axis geometric errors calibration model based on the common perpendicular line (CPL) transformation using the product of exponentials (POE) formula

International Journal of Machine Tools and Manufacture, 2017
Youping Chen, Jixiang Yang
exaly   +2 more sources

Generalized actual inverse kinematic model for compensating geometric errors in five-axis machine tools

International Journal of Mechanical Sciences, 2018
Geometric errors of five-axis machine tools, i.e. position independent and position dependent geometric errors (PIGEs and PDGEs), should be compensated in order to improve the machining precision of workpieces.
Yang Liu, M. Wan, Wan-Jing Xing, Qun-Bao Xiao, Weihong Zhang   +4 more
semanticscholar   +1 more source

Identification and compensation of geometric errors of rotary axes in five-axis machine tools through constructing equivalent rotary axis (ERA)

International Journal of Mechanical Sciences, 2019
This paper proposes a volumetric accuracy enhancement method of rotary axes in five-axis machine tools through constructing equivalent rotary axis (ERA).
Yang Liu, M. Wan, Qun-Bao Xiao, Weihong Zhang   +3 more
semanticscholar   +1 more source

Identification of position independent geometric errors of rotary axes for five-axis machine tools with structural restrictions

Robotics and Computer-Integrated Manufacturing, 2018
Some of five-axis machine tools, which are widely used for micro-machining, have structural restrictions, such as the center line of tilting rotary axis being close to the surface of worktable or beneath the worktable. In this paper, simultaneous motions
Yang Liu, M. Wan, Wan-Jing Xing, Weihong Zhang   +3 more
semanticscholar   +1 more source

Importance of the pig as a human biomedical model

Science Translational Medicine, 2021
Description Pigs are important biomedical models for studying human development and disease, for xenotransplant organ donors, and for vaccine and drug design. Pigs have substantial potential as biomedical models for studying human developmental processes,
J. Lunney, Angelica Van Goor, Kristen E. Walker, Taylor Hailstock, J. Franklin, Chaohui Dai   +5 more
semanticscholar   +1 more source

Geometric accuracy evaluation during coordinated motion of rotary axes of a five-axis machine tool

Measurement, 2019
This paper presents a novel method to identify Position Independent Geometric Errors (PIGEs) of a five-axis machine tool with a tilting head and a rotary table using a Double Ballbar (DBB).
Xiaogeng Jiang, Liang Wang, Chang Liu
semanticscholar   +1 more source

Applications of pixe-pige in philately

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1990
Abstract Several postage stamps dating back to the 1890's from the Republic of Taiwan were irradiated with an external 4.0 MeV proton beam to simultaneously induce X-ray and gamma ray emission. The paper and printing inks were compared between stamps made from different dies.
Gene S. Hall, Ming L. Lee
openaire   +1 more source

An atlas of the protein-coding genes in the human, pig, and mouse brain

Science, 2020
Mapping the mammalian brain The diverse physiology of the brain is reflected in its complex organization at regional, cellular, and subcellular levels. Sjöstedt et al.
E. Sjöstedt, Wen Zhong, Linn Fagerberg, Max J. Karlsson, N. Mitsios, C. Adori, P. Oksvold, F. Edfors, Agnieszka Limiszewska, F. Hikmet, Jinrong Huang, Yutao Du, Lin Lin, Zhanying Dong, Ling Yang, Xin Liu, Hui Jiang, Xun Xu, Jian Wang, Huanming Yang, L. Bolund, A. Mardinoğlu, Cheng Zhang, K. von Feilitzen, C. Lindskog, F. Pontén, Yonglun Luo, T. Hökfelt, M. Uhlén, J. Mulder   +29 more
semanticscholar   +1 more source

PIGE analysis of magnesium and beryllium

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2010
Abstract In this work, we present an alternative method for PIGE analysis of magnesium and beryllium in thick samples. This method is based on the ERYA – Emitted Radiation Yield Analysis – code, which integrates the nuclear reaction excitation function along the depth of the sample.
M. Fonseca, A.P. Jesus, H. Luís, R. Mateus, J. Cruz, L. Gasques, D. Galaviz, J.P. Ribeiro   +7 more
openaire   +1 more source