Liu Yun

ORCID: 0000-0002-5517-3908
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About
Contact & Profiles
Research Areas
  • Higher Education and Teaching Methods
  • Advanced Banach Space Theory
  • Educational Technology and Pedagogy
  • EFL/ESL Teaching and Learning
  • Advanced Harmonic Analysis Research
  • Text and Document Classification Technologies
  • Advanced Image and Video Retrieval Techniques
  • Advanced Algebra and Logic
  • Educational Robotics and Engineering
  • Digital Media and Visual Art
  • Advanced Measurement and Metrology Techniques
  • Optical measurement and interference techniques
  • Second Language Learning and Teaching
  • Image Processing Techniques and Applications
  • semigroups and automata theory
  • Physical Education and Pedagogy
  • Translation Studies and Practices
  • Differential Equations and Boundary Problems
  • Cognitive Abilities and Testing
  • Educational Technology and Assessment
  • Video Analysis and Summarization
  • Advanced Topics in Algebra
  • Higher Education Learning Practices
  • Korean Peninsula Historical and Political Studies
  • Winter Sports Injuries and Performance

Liaoning University
2024

Xi'an University of Technology
2024

Baltimore City Community College
2020

Yuxi Normal University
2008-2018

North University of China
2012

China Earthquake Administration
2012

University of Electronic Science and Technology of China
2011

Yunnan Normal University
2011

Henan University of Engineering
2010

Southwest University
2010

Phase unwrapping in regions of abnormal fringes remains an unresolved issue. In this paper, we present approach that combines image-inpainting strategy based on adaptive window which is obtained according to the density and orientation fringe patterns a quality-guided algorithm for phase unwrapping. First, threshold set quality map detect target region. Second, region filled with new values by method. Then, applied newly generated wrapped map. Finally, postprocessing unwrapped result...

10.1364/oe.395453 article EN cc-by Optics Express 2020-05-20

A language is left cancellative if from AB=AC, it follows that B=C, for any two languages B and C. Semi-singular inf-singular are disjoint sub-sets of introduced by Hsieh Shyr [Left elements in the monoid languages, Soochow J. Math. 4 (1978), pp. 7–15]. In this paper, we further study them. It shown all non-dense maximal semi-singular while right dense inf-singular. Finally, a theorem shows there which neither nor

10.1080/00207160.2010.526705 article EN International Journal of Computer Mathematics 2011-03-30

10.1007/s40840-016-0399-y article EN Bulletin of the Malaysian Mathematical Sciences Society 2016-07-08

10.1007/s11425-008-0109-9 article EN Science in China Series A Mathematics 2008-11-07

10.3866/pku.dxhx201611028 article EN University Chemistry 2017-01-01

Microteaching has gained considerable attention for its effectiveness in training teachers. Based on social-anthropological theory, a microteaching workshop Warwick SJTU ETD Programme 22 English teachers was investigated. Observation and interview, as the main basic methods, were applied to collect data. The results showed that offered participants an opportunity practice teaching receive useful feedback from peers professional supervisors. Moreover, it indicated improvement of largely...

10.3968/10586 article EN Canadian social science 2018-09-26

The continuous development of educational technology and the enrichment network digital resources provide a good environment opportunity for three-dimensional teaching materials in era "Internet +". After three dimensional development, are not only simple carriers content, but also carry many links teaching, such as design, methods, assessment evaluation. article makes comparative analysis traditional materials, multimedia materials. Focusing on new requirements +" this paper puts forward...

10.12783/dtem/ssemr2019/30908 article EN DEStech Transactions on Economics Business and Management 2019-09-11
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