Results 81 to 90 of about 28,415 (248)

The analysis of influence the parameters of rolling process in three high skew rolling mill of AZ31 magnesium alloy bars on temperature distribution

Metalurgija, 2016
The work presents the results of numerical investigations of AZ31 magnesium alloy bars obtaining by the rolling process in a three high skew rolling mill.
A. Gryc, T. Bajor, H. Dyja
doaj  

Mechanism of integrated forming of shape and inner hole of hollow axle

Metalurgija, 2022
The paper introduces a new technology of the integrated forming of shape and inner hole of hollow axle. Firstly, the design of the process is described. Secondly, the range of feed angle of two sets of rolls and the principle to be followed are explained.
C. Q. Ye, X. D. Shu, Y. X. Xia, J. T. Wang, S. Zhang   +4 more
doaj  

Numerical Prediction of Microstructure Evolution of Small-Diameter Stainless Steel Balls during Cold Skew Rolling. [PDF]

Materials (Basel), 2023
Zhou J, Liu S, Wang B, Xu H.
europepmc   +1 more source

Unordered Error-Correcting Codes and their Applications [PDF]

, 1993
We give efficient constructions for error correcting unordered {ECU) codes, i.e., codes such that any pair of codewords are at a certain minimal distance apart and at the same time they are unordered.
Blaum, Mario, Bruck, Jehoshua
core  

A Fuzzy Framework for Realized Volatility Prediction: Empirical Evidence From Equity Markets

Journal of Forecasting, EarlyView.
ABSTRACT This study introduces a realized volatility fuzzy time series (RV‐FTS) model that applies a fuzzy c‐means clustering algorithm to estimate time‐varying c$$ c $$ latent volatility states and their corresponding membership degrees. These memberships are used to construct a fuzzified volatility estimate as a weighted average of cluster centroids.
Shafqat Iqbal, Štefan Lyócsa
wiley   +1 more source

Kinematic stability of roller pairs in free rolling contact [PDF]

A set of generalized stability equations was developed for roller pairs in free rolling contact. A symmetric, dual contact model was used. Four possible external contact profiles that possess continuous contacting surfaces were studied. It was found that
Loewenthal, S. H., Savage, M.
core   +1 more source

A Comparison of Realized Measures of Integrated Volatility: Price Duration‐ vs. Return‐Based Approaches

Journal of Forecasting, EarlyView.
ABSTRACT We study the accuracy of a variety of parametric price duration‐based realized variance estimators constructed via various financial duration models and compare their forecasting performance with the performance of various nonparametric return‐based realized variance estimators.
Björn Schulte‐Tillmann, Mawuli Segnon, Timo Wiedemann   +2 more
wiley   +1 more source

Effect of process parameters on average grain size and microscopic uniformity of the three-roll skew rolling forming of the railway hollow shaft

Metalurgija, 2020
The average grain size and microstructure uniformity are the key factors determining the mechanical properties of the hollow shaft. In order to obtain a fine and uniform microstructure, a finite element model of threeroll skew rolling hollow shaft for ...
J. T. Wang, X. D. Shu, S. Zhang
doaj  

Study on the variation law of temperature field in three-roll skew rolling of variable diameter specimen

Metalurgija, 2022
This paper takes the simplified high-speed train hollow axle variable diameter section sample as the research object, uses Simufact.Forming simulation software for simulation, analyze the rolling piece inner variable diameter section, equal diameter ...
X. G. Chen, X. D. Shu, J. N. Shi
doaj  

Forming Quality Research on the Variable-Diameter Section of the Hollow Axle in Three-Roll Skew Rolling. [PDF]

Materials (Basel), 2022
Xia Y, Shu X, Shi J, Wang Y, Pater Z, Wang J.   +5 more
europepmc   +1 more source