Lei Zhou

ORCID: 0000-0001-9998-430X
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About
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Research Areas
  • Electric Motor Design and Analysis
  • Magnetic Bearings and Levitation Dynamics
  • Drilling and Well Engineering
  • Magnetic Properties and Applications
  • Iterative Learning Control Systems
  • Sensorless Control of Electric Motors
  • Hydraulic Fracturing and Reservoir Analysis
  • Spacecraft and Cryogenic Technologies
  • Advanced Thermodynamic Systems and Engines
  • Microgrid Control and Optimization
  • Reservoir Engineering and Simulation Methods
  • Smart Grid and Power Systems
  • Piezoelectric Actuators and Control
  • Advanced Sensor and Control Systems
  • Tunneling and Rock Mechanics
  • Adaptive Control of Nonlinear Systems
  • Wind and Air Flow Studies
  • Civil and Geotechnical Engineering Research
  • Power Systems and Renewable Energy
  • Electromagnetic Launch and Propulsion Technology
  • Smart Grid Security and Resilience
  • Fatigue and fracture mechanics
  • Oil and Gas Production Techniques
  • Soft Robotics and Applications
  • Advanced Computational Techniques and Applications

Chongqing Normal University
2024

Tianjin University
2024

Zhengzhou Institute of Emerging Industrial Technology
2024

University of Wisconsin–Madison
2023-2024

Ningxia Water Conservancy
2023-2024

National University of Singapore
2024

China Academy of Transportation Sciences
2022-2024

The University of Texas at Austin
2020-2023

Hong Kong University of Science and Technology
2023

University of Hong Kong
2023

Abstract In recent years, the growing environmental awareness has prompted increased attention towards substitution of nonrecyclable thermosetting epoxy resin composite materials with recyclable thermoplastic materials. The objective this study is to utilize a laboratory‐made polymethyl methacrylate (PMMA)/methyl (MMA) binary liquid (PMBLR) prepare resin/glass fiber (GF) using vacuum‐assisted perfusion method. These composites are then compared GF‐reinforced composites. investigation reveals...

10.1002/pc.28245 article EN Polymer Composites 2024-02-23

With high energy/power density, flexible and lightweight design, low self-discharge rates long cycle life, lithium-ion (Li <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">+</sup> ) batteries have experienced a surging growth since being commercialized in the early 1990s [1]. They are dominant today consumer electronics sector. Due to continually declining manufacturing costs, they also rapidly penetrating sectors such as power grid, renewable...

10.1109/mcs.2017.2696761 article EN IEEE Control Systems 2017-07-17

As the span and width of continuous rigid bridges increase, complexity spatial forces acting on these structures also grows, challenging traditional design methods. Primary beam theory often fails to accurately predict stresses in bridge girder, leading potential overestimation ultimate capacity bridges. This study addresses this gap by developing a detailed finite element (FE) model using ABAQUS, which accounts for complex 3D geometry, construction procedures, nonlinear material...

10.48550/arxiv.2501.03093 preprint EN arXiv (Cornell University) 2025-01-06

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10.2139/ssrn.5089417 preprint EN 2025-01-01

Abstract A comprehensive analysis of the bullheading process in Pressurized Mud Cap Drilling (PMCD) operations under various drilling parameters and flow conditions is presented this study, with a specific focus on role gas dissolution oil-based mud (OBM) - topic not thoroughly explored existing literature. Using commercial multiphase simulator, interactions between formation fluids (specifically or oil kicks) different types muds, such as water-based (WBM) OBM, during PMCD are investigated....

10.2118/223739-ms article EN SPE/IADC International Drilling Conference and Exhibition 2025-02-25

Abstract It is challenging to optimize operation procedures that safely remove riser gas without causing equipment, personnel, or unnecessary environmental issues. This paper presents results from studies of various scenarios using a fixed-choke constant outflow (FCCO) method will keep the choke opening measure fluid while circulating out through booster line. A commercial dynamic multiphase flow software program was used study extreme up 300 bbl influx in bottom deepwater rig equipped with...

10.2118/217706-ms article EN IADC/SPE International Drilling Conference and Exhibition 2024-02-27

Abstract Recently, thermosetting epoxy resin is expected to be substituted by thermoplastic featured from green circular economy. Poly(methyl methacrylate) (PMMA) has been well known as one promising resin, although its mechanical property needs further investigated. In this paper, the free radical polymerization of methyl methacrylate (MMA) was initiated lauroyl peroxide/ N,N ‐dimethylaniline (LPO/DMA) and ‐dimethyl‐p‐toluidine (LPO/DMT) redox system at room temperature, respectively. The...

10.1002/pc.29151 article EN Polymer Composites 2024-10-19

This article presents a unique multiphysical analytical modeling framework and solution algorithm to provide an effective tool for design of magnetically steerable robotic catheters (MSRCs) experiencing external interaction loads. Particularly, in this study, we are interested fabrication MSRC with flexural patterns treatment peripheral artery disease (PAD). Aside from the parameters involved magnetic actuation system loads acting on MSRC, considered have critical role deformation behavior...

10.1109/tmech.2022.3174520 article EN IEEE/ASME Transactions on Mechatronics 2022-05-27

This article presents the design, construction, modeling, and testing of a novel magnetically levitated linear stage using bearingless slice motor targeting in-vacuum transportation tasks in precision manufacturing systems. The is driven by hysteresis motors, where secondaries are made semihard material exhibiting magnetic hysteresis. suspension three degrees freedom, including vertical, pitch, roll, achieved passively through permanent magnet bias flux. lateral yaw directions actively...

10.1109/tmech.2020.3017435 article EN IEEE/ASME Transactions on Mechatronics 2020-08-18

This paper presents the design and simulation of a superhigh-speed permanent magnet synchronous motor (PMSM) that operates in cryogenic temperature 77 K. The designed PMSM is used to drive two-stage cryocooler for zero boil-off long duration storage liquid hydrogen systems. addresses electromagnetic thermal finite-element analysis, selection materials applications, stress rotor dynamic some tradeoffs design. A prototype was built verify methodology.

10.1109/tmag.2005.854983 article EN IEEE Transactions on Magnetics 2005-10-01

This paper investigates the speed sensorless state estimation problem for induction motors. Aiming at developing new means to improve bandwidth, this proposes various moving horizon (MHE)-based estimators. Applying MHE motors is not straightforward due fast convergence requirement, external torque disturbances, parametric model errors, etc. To transient performance, we propose an based on full motor and assumed load dynamics. We further formulate adaptive jointly estimate parameters states...

10.1109/acc.2016.7525249 article EN 2022 American Control Conference (ACC) 2016-07-01
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