Yunfeng Liu

ORCID: 0000-0003-4199-0605
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About
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Research Areas
  • Electric and Hybrid Vehicle Technologies
  • Hydraulic and Pneumatic Systems
  • Medical Research and Treatments
  • Regional Development and Environment
  • Educational Reforms and Innovations
  • Electric Power Systems and Control
  • Advanced Battery Technologies Research
  • Electric Vehicles and Infrastructure
  • Accounting and Organizational Management
  • Control and Dynamics of Mobile Robots
  • Anomaly Detection Techniques and Applications
  • Civil and Geotechnical Engineering Research
  • Elevator Systems and Control
  • Scientific Measurement and Uncertainty Evaluation
  • Mechanical Failure Analysis and Simulation
  • Radar Systems and Signal Processing
  • Belt Conveyor Systems Engineering
  • Library Collection Development and Digital Resources
  • Industrial Automation and Control Systems
  • Digital Media Forensic Detection
  • Auditing, Earnings Management, Governance
  • Engineering Structural Analysis Methods
  • Advanced Sensor Technologies Research
  • Technology and Human Factors in Education and Health
  • Electric Motor Design and Analysis

Hunan University
2019-2025

Hunan Institute of Engineering
2023-2025

Bohai University
2008-2024

Jiangxi University of Traditional Chinese Medicine
2019

Chinese Academy of Sciences
2016

Shanghai University of Engineering Science
2014

Taiyuan University of Science and Technology
2013

Taiyuan Heavy Industry (China)
2004

Appropriate energy management strategy can further improve the fuel economy of plug-in hybrid electric vehicles (PHEV). Rule-based control strategies are dominant in actual because their fast calculation and easy implementation. However, incorrect parameter settings suboptimal may lead to substantial performance variations, preventing optimal efficiency emissions reduction. In this paper, dynamic programming algorithm is implemented design for a dual-motor PHEV. The MATLAB/Simulink...

10.3390/electronics14071450 article EN Electronics 2025-04-03

In order to develop continuously variable transmission (CVT) suited for electric vehicle (EV), a comparative analysis of the used on EV is introduced in this paper. To solve problems traditional CVT EV, newly designed (ECVT) proposed. The final drive ratio, speed ratio range variator and hydraulic system ECVT are redesigned improving efficiency. Considering that permanent magnet synchronization traction motor (PMSTM) has an ideal driving characteristic (Constant torque at low speed, constant...

10.1109/access.2023.3318323 article EN cc-by-nc-nd IEEE Access 2023-01-01

An electric oil pump (EOP) for the hydraulic system of a continuously variable transmission (CVT) based hybrid vehicle is developed by considering arrangement structures and realization an drive mode (EDM). The basic parameters required EOP motor are obtained analyzing flow rate pressure CVT. Then, designed developed. Current-pressure characteristics different solenoid valves measured analyzed designing CVT speed ratio controller. controller, control strategy in detail with use as power...

10.1109/tvt.2018.2868360 article EN IEEE Transactions on Vehicular Technology 2018-09-03

10.1007/s00521-022-07120-9 article EN Neural Computing and Applications 2022-03-14

An electric oil pump (EOP) must be used to supply for actuators in the hybrid continuously variable transmission (CVT) on launch state of vehicle. To develop this EOP, current CVT‐based schemes and use EOP traditional automatic transmissions are analysed. Permanent magnet synchronous motor (PMSM) type is chosen as power source developed its advantages high efficiency long‐life cycle. The PMSM designed simulated by ANSYS EM. Based parameters simulation results, sensor‐less speed controller...

10.1049/iet-epa.2018.5962 article EN IET Electric Power Applications 2019-03-19

A new dual-motor plug-in hybrid system has been developed in this paper. The a variety of operating modes such as "pure electric drive", "series "parallel and oil which can maximize fuel efficiency according to the driving conditions vehicle needs driver. By adding high-power on-board chargers high-capacity lithium-ion battery packs system, more be achieved. This paper introduces parameters performance indexes main components establishes simulation model powertrain, formulates control...

10.1109/access.2024.3406541 article EN cc-by IEEE Access 2024-01-01

10.1109/yac63405.2024.10598463 article EN 2022 37th Youth Academic Annual Conference of Chinese Association of Automation (YAC) 2024-06-07

So as to improve the detectability of small targets on sea clutter, method based variable forgetting factor linear prediction is proposed. First, recursive least square used dynamically adjust parameters model. Secondly, value given by adjustable formula. Finally, error calculated and target results are obtained threshold comparison. The experiments show that detect performance proposed superior conventional method. overcomes limitation fixed model improves detection capability.

10.1109/iccss.2017.8091389 article EN 2020 7th International Conference on Information, Cybernetics, and Computational Social Systems (ICCSS) 2017-07-01

Citibank is a leading multinational bank. In its development history of nearly 200 years, has developed from an unknown small bank to world-leading financial predator. This period contains lot Citibank's secret methods. paper starts recruitment strategy and introduces basic standards requirements for employees. also summarizes way choosing employing persons, attributes the quality which successful people need discusses diverse characteristics persons. I hope this can bring some...

10.5430/rwe.v5n1p99 article EN Research in World Economy 2014-03-04

Force tests were conducted at the long-duration-test shock tunnel JF12, which has been designed and built in Institute of Mechanics, Chinese Academy Sciences. The performance demonstrated that this facility is capable reproducing a flow dry air Mach numbers from 5–9 more than 100 ms test duration. Therefore, traditional internal strain-gauge balance was considered for force use large impulse facility. However, when are tunnel, inertial forces lead to low-frequency vibrations model its motion...

10.2514/6.2016-3427 article EN 35th AIAA Applied Aerodynamics Conference 2016-06-10

In order to enhance the patriotism, national pride, and social responsibility of college students, fully leverage role main channel classroom education, ideological political elements are integrated into course "Computer Organization Principles". Taking knowledge po

10.4108/eai.8-9-2023.2339955 article EN 2023-01-01

In this study, 202 students from Jiangxi University of Traditional Chinese Medicine were selected as subjects.The subjects divided into two groups: the Shuangwei group and non-Shuangwei group.A one-year follow-up survey was conducted on their leadership level.The results showed that: (1) After intervention practice mode, level significantly higher than one; (2) There no significant difference in before after intervention; (3) The social responsibility scores behavior those one, but there...

10.2991/assehr.k.191221.079 article EN cc-by-nc Proceedings of the 2019 3rd International Conference on Education, Economics and Management Research (ICEEMR 2019) 2019-01-01
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