Liu Yan-chun

ORCID: 0009-0007-6012-2332
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About
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Research Areas
  • Industrial Technology and Control Systems
  • Metallurgy and Material Forming
  • X-ray Diffraction in Crystallography
  • Fire effects on concrete materials
  • Higher Education and Teaching Methods
  • Crystallization and Solubility Studies
  • Advanced Computational Techniques and Applications
  • Iron and Steelmaking Processes
  • Structural Behavior of Reinforced Concrete
  • Microstructure and Mechanical Properties of Steels
  • Structural Load-Bearing Analysis
  • Geoscience and Mining Technology
  • Education and Work Dynamics
  • Aluminum Alloys Composites Properties
  • Concrete Corrosion and Durability
  • Advanced Algorithms and Applications
  • Advanced Measurement and Detection Methods
  • Metallic Glasses and Amorphous Alloys
  • Machine Fault Diagnosis Techniques
  • Underwater Acoustics Research
  • Concrete Properties and Behavior
  • Discourse Analysis and Cultural Communication
  • EFL/ESL Teaching and Learning
  • Simulation and Modeling Applications
  • Subtitles and Audiovisual Media

Qingdao University of Technology
2020-2025

Anhui University of Technology
2001-2024

Qingdao University of Science and Technology
2023

Changchun Institute of Applied Chemistry
2022

Chinese Academy of Sciences
2022

Northeast Normal University
2022

Naval University of Engineering
2019

Communication University of China
2018

Drexel University
2015

Harbin Engineering University
2007-2012

Creative teaching represents a novel approach that can be used to enhance higher education students' Self-Regulated Learning (SRL). At present, research on how creative affects SRL is relatively limited. Based the Hierarchy of Effects (HoE) model and commitment-involvement theory, study aims investigate comprehensive influence SRL. Data were collected in China. Four findings identified. First, significantly influences cognitive involvement, subsequently impacting emotional involvement....

10.4018/ijdet.368144 article EN International Journal of Distance Education Technologies 2025-02-01

This paper describes a novel dual-band patch antenna on organic magnetic substrate for wireless local area networks (WLAN) communication (at 2.4 and 5GHz). The operation is obtained by embedding pair of L-shaped slots. material adopted because the can reduce size 40%, comparing with rectangular microstrip antennas normal dielectric substrate, have wider bandwidths both bands. Details proposed design are presented discussed, which be candidate requirement WLAN, operating in 5GHz.

10.2528/pierc09010704 article EN Progress In Electromagnetics Research C 2009-01-01

Abstract This paper introduces an enhanced you only look once (YOLO) v5s‐D network customized for detecting various categories of damage to post‐fire reinforced concrete (RC) components. These types encompass surface soot, cracks, spalling, and rebar exposure. A dataset containing 1536 images depicting damaged RC components was compiled. By integrating ShuffleNet, adaptive attention mechanisms, a feature enhancement module, the capability multi‐scale extraction in complex backgrounds...

10.1111/mice.13314 article EN Computer-Aided Civil and Infrastructure Engineering 2024-07-24

The fire resistance of corroded reinforced concrete has attracted extensive attention, mainly due to the frequent occurrence fires in old structures. However, using postfire bond strength predict structural capacity during leads inaccurate results. Thus, this study, an accelerated corrosion test and eccentric pullout were performed under steady-state conditions from 20°C 800°C. results indicated that compared with at 20°C, 200°C decreased by 6% for specimen (corrosion level below 4.3%)...

10.1061/jsendh.steng-11967 article EN Journal of Structural Engineering 2023-07-25

Thermal mechanical control processing (TMCP), which includes combination of controlled rolling and cooling, provides a powerful means developing high-strength low alloy (HSLA) steels by intensive microstructural control. In the present investigation, effects TMCP parameters, consisting finish cooling temperature start in non-recrystallization region, on final microstructure properties an Nb-Ti microalloyed steel has been studied tensile, Charpy impact tests, optical microscopy scanning...

10.2355/isijinternational.45.851 article EN ISIJ International 2005-01-01

The bond performance of corroded reinforced concrete (RC) subjected to fire has a significant influence on evaluating the structural load-bearing capacity and early warning for structure collapse. However, deterioration mechanism RC not been sufficiently studied. Therefore, in this study, behavior between reinforcement at elevated temperatures was systematically investigated by testing 76 specimens obtained accelerated corrosion method. Eccentric pull-out tests were performed immediately...

10.1061/jmcee7.mteng-15206 article EN Journal of Materials in Civil Engineering 2023-06-02

Based on the shield-cutting existing station supporting piles project of Zhengzhou metro line 6, process and mechanism concrete in pile cutting were analyzed by establishing a three-dimensional model with cutter. The magnitude variation rules force, penetration tangential force explored. four factors speed, depth, cutter width, tool rake angle correctness numerical results verified theoretical analysis method. Finally, significance influencing was studied means range variance using...

10.3390/su151511699 article EN Sustainability 2023-07-28

A new type of online accelerated cooling equipment for seamless steel pipe and its application experiments were introduced in the present work. The can simultaneously cool inner outer surface pipes. By using process, mechanical properties test made Q345B composition meet requirements Q460E grade index, with yield strength 460~475MPa, tensile 601~603MPa, elongation 21.5~26.5%, -40°Cimpact energy 136J.

10.2355/isijinternational.isijint-2024-038 article EN cc-by-nc-nd ISIJ International 2024-04-02

Downward continuation of magnetic field allows to enhance the resolution. Among available techniques, iteration method for downward anomaly has better accuracy and a larger depth. Firstly, principle is presented, characteristic analyzed. The computation model practical data with noise different variance performed by means method. accuracy, reliability stability are evaluated based on comparison analysis results real data. Practicability enhanced.

10.3969/j.issn.0001-5733.2009.08.029 article EN Chinese Journal of Geophysics 2009-08-01

Лю Яньчунь МОТИВАЦИОННАЯ СТРУКТУРА СУБПОЛЯ «СГЛАЗ, ПОРЧА» ЛЕКСИКО-СЕМАНТИЧЕСКОГО ПОЛЯ «ВРЕД» В ДИАЛЕКТАХ РУССКОГО ЯЗЫКАПроанализирована диалектная лексика со значением 'сглаз, порча' с точки зрения ее семантико-мотивационной структуры.Анализ показывает, что в большинстве своем диалектные единицы отражают веру носителей традиционной культуры действенную, магическую силу / взгляда, речи слова, мысленного посыла, некоторых действий, истолкованных как могущие принести вред адресату, являющиеся...

10.17223/15617793/427/6 article RU Vestnik Tomskogo gosudarstvennogo universiteta 2018-02-01

A support service system is an important condition for guaranteeing teaching and learning effects. Based on theories concepts concerning new mixed modes, the concept of “MOOC+SPOC”-based mode analyzed defined, coupled with MOOC+SPOC-based computer course practice H university in China, a model constructed. questionnaire survey method adopted to learn about students’ various demands services view their demands, measures improving are put forward.

10.12783/dtssehs/icaem2016/4233 article EN DEStech Transactions on Social Science Education and Human Science 2016-12-08

Acoustic Emission signal reflecting the tool wear state is made by phase space reconstruction that uses mutual information method and Cao to determine time delay embedding dimension for constructing matrix. After reconstruction, calculating singular spectral of matrix, based on which characteristic vector constructed. These vectors are combined with Support Vector Machine training, supports classifier model predict new data. Compared gotten AE being directly put into after signals KC9125...

10.1109/icdma.2011.286 article EN 2011-08-01
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