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Classification of common electrical faults of CNC machine tools
Introduction
The CNC machine is a kind of automation equipment which is widely used in modern machinery manufacturing. Its working principle is to use a computer to process a program, use the numerical control controller to read the program signals, realize the corresponding mechanical actions, an......
1053 
Sophia
Unsteady Flow Field and Influencing Factors in Friction Stir Welding Process
Abstract
This article aims to explore the unsteady flow field and influencing factors of mixing, friction, and welding process. Firstly, the measured unsteady pressure signal and the turbulence kinetic energy data were compared with the existing theoretical models and then discussed. Finally, thi......
Irradiation-Induced Dimensional Changes in Graphite
Graphene is a monolayer of graphite, and its atoms are arranged in hexagonal lattices. With its excellent electrical, optical, mechanical and thermal properties, graphene has attracted much attention. Thus, the mechanism of graphene size changing under irradiation has become one of the hotspots of......
Raman Spectroscopy of Carbon Materials
Raman spectroscopy is one of the most powerful tools for the characterization of carbon materials. This technique is based on the excitation of Raman-active molecular vibrations within the material, allowing for the identification of organic and inorganic species, as well as the characterization o......
Wiedemann-Franz law
Weisman-Franz Law
The Weisman-Franz law, formulated by Rudolph Weisman and Julius Franz in the 19th century, states that the electric conductivity of metals increases linearly with absolute temperature. This phenomenon was first observed and formulated in 1841 by the famous English scientist, Will......
mineral luminescence
Fluorescence of Minerals
Minerals are organic materials found in the earth’s crust which can have a range of properties. Some of these properties, such as color or hardness, are well known, but many are not. One of the lesser known properties of minerals is their tendency to fluoresce when expos......
Midea Group
Midea Group
Midea Group is a Chinese enterprise group that specializes in production and sales of home appliances and consumer goods. Established in 1968 and headquartered in Beijiao Town, Shunde District, Foshan, Guangdong, it has grown into a Fortune Global 500 enterprise.
Midea Group has thre......
Karin Koopmans
The Life of Kalijin Kupmans
Kalijin Kupmans is a man of many talents, having achieved success in both music and film. Born in South Africa, Kupmans moved to the United States at the age of 15. Since then, he has released three studio albums and established himself as a respected producer and acto......
Lange model
The St. Petersburg Paradox
The St. Petersburg Paradox is a famous problem in economics and game theory that has fascinated numerous economists, philosophers and mathematicians since it was first presented in the late 18th century. The paradox is based on a simple game, in which a coin is flipped ......
Cournot model
Gunnarsson-Sheath model
The Gunnarsson-Sheath (GS) model is a phenomenological quantum many-body theory (QM) used to describe the emergence of collective properties in quantum dynamic systems. The model was developed by the Swedish physicist Ove Gunnarsson and his colleague Jürgen Sheath to desc......
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