A5021686196- Railway Engineering and Dynamics
- Mechanical stress and fatigue analysis
- Gear and Bearing Dynamics Analysis
- Power Systems and Renewable Energy
- Chaos control and synchronization
- Magnetic confinement fusion research
- Microgrid Control and Optimization
- Quantum chaos and dynamical systems
- Civil and Geotechnical Engineering Research
- HVDC Systems and Fault Protection
- Adhesion, Friction, and Surface Interactions
- Control Systems in Engineering
- Metal Forming Simulation Techniques
- High-Voltage Power Transmission Systems
- Geotechnical Engineering and Underground Structures
- Particle accelerators and beam dynamics
- Electromagnetic Compatibility and Noise Suppression
- Sensorless Control of Electric Motors
- Nonlinear Dynamics and Pattern Formation
- Electrostatic Discharge in Electronics
- Rock Mechanics and Modeling
- Wind Turbine Control Systems
- Electrical Contact Performance and Analysis
- Power Systems Fault Detection
- Brake Systems and Friction Analysis
Guangxi University of Science and Technology
2004-2025
Air Force Medical University
2025
China Academy of Railway Sciences
2022-2024
Henan Energy & Chemical Industry Group (China)
2024
Energy Research Institute
2024
Beijing Jishuitan Hospital
2023
Peking University
2023
Chang'an University
2013-2022
Shaanxi Provincial People's Hospital
2022
Southeast University
2021
In this article, a modified maximum power trapezium (MPT) method for global point tracking of photovoltaic (PV) systems under partially shaded conditions (PSCs) is proposed. Compared with the traditional MPT method, proposed introduces variable current range lower bound by utilizing monotonic output characteristics PV array. Moreover, considering influence initial operating array on scanning path dynamic PSCs, judgment mechanism voltage added in method. The guarantees that tracked accurately...
CDK4/6i, the first-line drug for treating ERα-positive breast cancer, significantly improves clinical outcomes. However, CDK4/6i resistance often develops and remains a major hurdle, underlying mechanisms remain challenging to fully investigate. Here, we used Genome-wide CRISPR/Cas9 library screening combined with single-cell sequencing screen molecules mediating identified METTL14 as determinant of sensitivity. Clinical samples datasets were analyzed in vitro vivo experiments performed...
This paper first presents the occurrence of Hopf bifurcation and chaos in a practical synchronous reluctance motor drive system. Based on derived nonlinear system equation, analysis shows that loses stability via when d-axis component its three-phase voltages control. Moreover, corresponding Lyapunov exponent calculation further proves existence chaos. Finally, computer simulations experimental results are used to support theoretical analysis.
To compare the clinical outcomes of performing a closed tibial high osteotomy with an open and changes in posterior tibia slope patellar height. Methods were collected from three hundred forty patients (440 knees) performed January 2019 to 2020. Forty (50 had lateral wedge (LCWHTO), 300 (390 medial (MOWHTO). The follow-up periods 20.5 months 19.9 months, respectively. At final visit, both groups evaluated Lysholm score joint range motion (ROM). Changes preoperative postoperative mechanical...
Dynamic wheel–rail interaction in railway turnouts is more complicated than on ordinary track. In order to evaluate the derailment behaviour of wheelsets turnouts, this paper presents a study dynamic during wheel flange climbs turnout rails, by applying elasticity positioning wheelset model. A numerical model established based coupled finite element method and multi-body dynamics, applied both facing trailing directions turnout, as well wheel–turnout rail climbing rails. The influence attack...
Abstract Broken gap is an extremely dangerous state in the service of high-speed rails, and violent wheel–rail impact forces will be intensified when a vehicle passes at high speeds, which may cause secondary fracture to rail threaten running safety vehicle. To recognize damage tolerance length, implicit–explicit sequential approach adopted simulate high-frequency impact, considers factors such as coupling effect between frictional contact structural vibration, nonlinear material real...
The dynamic effects involved in wheel-rail interactions can be increased by the traction force potentially causing rapid degradation of turnout rails. A precise stress/strain analysis is essential for frictional rolling contact and related degradation. Therefore, an explicit finite element method established considering to contact. Furthermore, solutions with different coefficient are investigated. results indicate that effect asymmetric excitation caused geometric irregularities will lead...
Track stiffness in railway turnouts is variable due to differences structural composition along the longitudinal direction, which will lead severe dynamic interaction between train and turnout. In this paper, a transient analysis model presented investigate characteristics of high-speed based on finite element method applied optimise turnouts. Furthermore, effect variations train-turnout analysed. The calculation results show that track are similar main diverging line turnout, except for...
To improve the understanding of wheel/rail contact behaviour and damage mechanisms in turnouts, 3D explicit finite element model a wheelset rolling over switch is introduced. This takes into account arbitrary geometrical profile wheel-rail system, relative motion between switch/stock rail, nonlinear materials actual moving postures wheelset. Precise frictional solutions dynamic response, including stress, surface shear microslip, roll angle lateral displacement, are all studied to obtain...
Industrial mixers are among the most expensive and ineffective equipment in food, drug, chemical semiconductor industries. Effects of this ineffectiveness not only energy wastage, but also can be disastrous. Instead using complicated mechanical means, This work presents a new way which electrically produce desired chaotic motion for industrial mixing processes. Namely, chaotization DC motor (the agitator) time-delay feedback control is proposed implemented. Theoretical derivation computer...
The doubly fed induction generator (DFIG) is major type of wind turbine used in grid-connected farms. Practical models DFIG have been built to study the influence power generation on system dynamics. However, most existing practical are based rectangular coordinates, which frequency variation neglected. In this paper, a phase–amplitude (P–A) model proposed for phase and amplitude internal voltage. structure much like that synchronous generator, rotor voltage can manipulate both Comparisons...
Frequency stability is vital for the operation of power system. The total equivalent rotational inertia system decreases relatively upon large-scale penetration wind and threaten its frequency further. This paper analyzes support capacity doubly fed induction generator proposes a modified virtual control strategy based on power-frequency response by improving conventional strategy. For each specific case, corresponding scheme chosen. Besides, rotor speed protected module associated with...
Well-designed wheel-rail profiles are not only helpful in achieving expected dynamic vehicle performance but also extending the service lives of wheels and rails. In this paper, a method for designing is presented based on rolling radius difference. This consists three parts, i.e., reverse designs wheel profiles, symmetric rail non-symmetric profiles. A design that can obtain smooth profile formed by quadratic curves established according to mapping relation between difference gradient....
Flange bearing frogs are designed to provide continuous rolling surfaces for trains traveling on the through line, but interaction between wheel and rail in a diverging line is more complex than that common crossing, especially including flange mode multipoint contact during transition. The load will be transited from tread back tread, which intensify wheel‐rail interaction. In this paper, numerical procedure presented analysis of behavior damage prediction frog. three‐dimensional explicit...
This work evaluates the susceptibility of a bandgap voltage reference to high electromagnetic interference superimposed at direct power injection on supply and majority carriers substrate phenomena (typically observed during Bulk Current Injection, BCI). The investigation shows significant impact input pair OTA, isolation connection components in disturbance automotive environment. When layer device is connected increase immunity, DPI performance pin (PSDPI) highly degraded. On other hand,...