Specifications

fractional-order systems (Lu¨-Lu¨) and two different fractional-order systems (Lu¨-Liu¨).
Numerical simulations illustrate the effectiveness of the proposed method. © 2013 IEEE.
Number of references: 15
Main heading: Chaotic systems
Controlled terms: Sliding mode control
Uncontrolled terms: Active sliding mode controls - Error systems - Fractional
order - Fractional-order chaotic systems - Fractional-order systems - Modified projective
synchronization - Stability theorems
Classification code: 731.1 Control Systems - 921 Mathematics - 931 Classical Physics;
Quantum Theory; Relativity - 961 Systems Science
DOI: 10.1109/CCDC.2013.6561621
Database: Compendex
Compilation and indexing terms, © 2013 Elsevier Inc.
15.
Accession number: 20133516670650
Title: Microstructure numerical simulation of weld pool in rapid solidification
Authors: Zhang, Min1 ; Wang, Qiang1 ; Li, Jihong1 ; Li, Lin1 ; Zhi, Jinhua1 ; Luo, Hailong1/张
敏;汪强;李继红;李琳;支金花;;
Author affiliation:
1 School of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048,
China
Corresponding author: Zhang, M. ([e-mail])
Source title: Hanjie Xuebao/Transactions of the China Welding Institution
Abbreviated source title: Hanjie Xuebao
Volume: 34
Issue: 7
Issue date: July 2013
Publication year: 2013
Pages: 1-4+28
Language: Chinese
ISSN: 0253360X
CODEN: HHPAD2
Document type: Journal article (JA)
Publisher: Harbin Research Institute of Welding, No. 111 He-Xing Lu, Harbin, China
Abstract: Based on grain formation principle and kinetics characteristics of dendrite growth,
two-dimensional mathematical and physical model of nucleation, dendrite growth, redistribution
and diffusion of the solute were established to simulate the columnar-to-equiaxed transition in
rapid solidification process of welding molten pool and the influence of different cooling rate on
this transition process was also studied. The results show that, the solute redistribution and
diffusion are evident in the process of rapid cooling. When the columnar grains transform into
equiaxed grains, the discharged solute makes concentration sharply increased at the tip of
columnar grain, which inhibits the growth of columnar crystals. Moreover, the change will be
more likely to occur at higher cooling rate, and the required time will be also shorter.