A5101738087- Advanced Sensor and Control Systems
- Advanced Algorithms and Applications
- Smart Grid and Power Systems
- Geoscience and Mining Technology
- Advanced Computational Techniques and Applications
- Power Systems and Technologies
- Advanced DC-DC Converters
- Industrial Technology and Control Systems
- Electromagnetic Compatibility and Noise Suppression
- Power Transformer Diagnostics and Insulation
- Power Systems and Renewable Energy
- Adaptive Control of Nonlinear Systems
- 3D Shape Modeling and Analysis
- Hydrocarbon exploration and reservoir analysis
- Stability and Control of Uncertain Systems
- Geomechanics and Mining Engineering
- Multilevel Inverters and Converters
- High-Voltage Power Transmission Systems
- Hydraulic and Pneumatic Systems
- Microgrid Control and Optimization
- Vibration and Dynamic Analysis
- Inertial Sensor and Navigation
- Advanced Battery Technologies Research
- Advanced Numerical Analysis Techniques
- Space Satellite Systems and Control
China National Offshore Oil Corporation (China)
2021-2024
Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)
2024
University of Hagen
2002-2024
Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)
2024
Southwest Petroleum University
2020-2024
Shandong University of Science and Technology
2024
Sun Yat-sen University
2024
North China Electric Power University
2008-2023
Chinese Academy of Sciences
2009-2023
Institute of Process Engineering
2009-2023
State of health (SOH) estimation and remaining useful life (RUL) prediction can ensure reliable safe system operation reduce unnecessary maintenance costs. In this paper, to improve the accuracy reliability SOH RUL prediction, a novel method based on second-order central difference particle filter (SCDPF) is proposed. By optimizing importance probability density function, degeneracy phenomenon (PF) be solved. Experiments from National Aeronautics Space Administration (NASA) Center for...
Instantaneous flow dynamics induced by rotor-stator interaction are detrimental to the stable operation of centrifugal pumps.In this study, unsteady and structures within a low specific-speed pump analysed using Large Eddy Simulation (LES) method.For that purpose, pressure pulsations evolution processes vortical combined investigate in order clarify inherent correlation between amplitude vorticity distribution.The results show distinct peaks at blade passing frequency (f BPF ) closely...
Organic matter is the material basis for shales to generate hydrocarbon, as well main reservoir space and seepage channel shale gas. When thermal evolution degree consistent, organic carbon content in present subject abundance of primitive sedimentary matter. Deep geofluids significantly influence matter’s enrichment, but mechanism remains unclear. This paper aimed at determining how hydrothermal volcanic activities affected enrichment by studying lower Cambrian Yangtze region upper...
Mo-doped TiO2 nanotube arrays are prepared successfully by a combined method of direct current (DC) magnetron sputtering and anodic oxidation. The doping amount Mo can be modified changing the number molybdenum blocks on Ti target while Ti–Mo alloy film is metal substrate, following array grown anodization. Morphology test shows that could inhibit phase transition growth crystal TiO2. X-ray photoelectron spectroscopy (XPS) results show has been embedded in lattice mainly exists valence...
When dc-dc converters operate in chaotic modes, they can generate spread spectra, which are useful for reducing the electromagnetic interference (EMI). Conventionally, Fast Fourier Transform (FFT) is used to analyze spectra. However, it not applicable inner-harmonics, nonintegral multiples of fundamental frequency, a prominent feature signals. In this brief, Prony method suggested spectral estimation converters. Numerical simulations show its advantages over traditional FFT
Abstract A novel chaotic pulse‐width‐modulation (PWM) boost converter has been previously proposed to reduce electromagnetic interference (EMI) in DC–DC converters, where the circuit design and simulations have conducted, but problems such as mean value estimation of state variables for parameter design, ripple input current stability analysis remained be addressed this paper. Here, a method is first proposed, which used estimate values PWM converters facilitating selection components....
In this paper, an adaptive fuzzy PD+ controller is proposed for the attitude maneuver of rigid spacecraft. The novel adjusts gains online according to errors and angular velocity during procedure. Therefore, quick response avoidance actuator saturation can be achieved simultaneously. Furthermore, adaptation mechanism designed, based on Lyapunov theory, guarantee stability closed-loop system. To achieve good performance system under constraint saturation, parameter optimization developed...
Abstract This paper proposes a composite non-singular fast terminal sliding mode attitude control scheme based on reduced-order extended state observer for the stratospheric airship’s system affected by multiple disturbances. First, feedback linearisation method is applied to address nonlinearity of motion model and achieve decoupling in three channels. Second, overall disturbances, encompassing airship parameter perturbations external are treated as an aggregate. A designed each channel...
This paper presents a method for moving least square curve and surface fitting with interpolation conditions. The is firstly proposed solving the problem of It has more advantages including that degree function low computation convenient. Then, extended to solve problem. We use approximation experimental results show it obtains satisfactory effect.
We demonstrate herein a novel strategy that combines both strain engineering and geometrical confinement in one system to realize controlled wrinkling. The location, shape size of air bubbles entrapped poly(dimethylsiloxane) (PDMS) devices are precisely via soft lithography technique. During the Au sputtering process, thin PDMS covers first stretched due bubble inflation under negative pressure. subsequent coating results Au–PDMS bilayer structure. When returned atmospheric pressure,...
With the rapid increase in proportion of wind power, frequency stability problem power system is becoming increasingly serious. Based on MATLAB/Simulink simulation, role and effect secondary modulation assisted by Flywheel Energy Storage System (FESS) regional grid with certain penetration rates are studied. First, linear control used to establish primary model FESS assisting characteristics participating analyzed according transfer function. Then, case step disturbance continuous load a...
In this work, we report a facile and effective strategy to generate patterned wrinkles. This includes first adhering thin poly(dimethylsiloxane) (PDMS) film (<82 µm) on porous conductive adhesive tape (CAT), followed by sputter coating of Au onto PDMS under vacuum condition, which results in formation wrinkles the Au-PDMS bilayer. CAT was found induce local stretching film, key for controlled wrinkle formation. Compared with previous wrinkling methods, our is simpler gives smaller feature...
The use of passive shutdown systems to enhance safety is one element next-generation reactor design. Freeze-Valve has been proposed as a key device in the system stop chain reaction Molten Salt Reactor (MSR), which chosen by Generation IV International Forum (GIF) six concepts. During normal operation, molten salt valve cooled solid plug. In event that overheats under accident conditions when all other active control fail, plug will melt. liquid fuel be pulled out from core gravity into dump...
The 3D clothing fitting on a body model is an important research topic in the garment computer aided design (GCAD). During process, match between and models still problem for researchers. In this paper, we provide method based feature point match. We firstly use new cubic-order weighted patch to estimate geometric properties of each vertex two mesh models. Feature points are then extracted from matching function constructed them according curvature torsion. interactively select several key...
The paleokarst reservoirs of the Ordovician Yingshan formation, rich in oil and gas, are deeply buried central Tarim Basin, northwest China. Dozens imaging well-logs this region reveal five typical features, including solution vugs, solution-enlarged fractures, filled caves, unfilled caves collapsed as well two structures located different paleotopographic sites, vadose phreatic zones. For seismic data, large wave impedance contrast between paleocave system surrounding rocks leads to a...
The basic equation of steady gradually varied flow describes the variation water depth with process. Because it's difficult to be solved directly, standard step method becomes general way calculate surface profile, which will entail many problems when iteration must used. Thus paper does a research on Runge-Kutta solve differential directly avoiding these problems. Two calculation models for profile are derived, both prismatic channel, and also non-prismatic channel. They can from upstream...