A5016592844- Fuel Cells and Related Materials
- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Electric Motor Design and Analysis
- Semiconductor materials and devices
- Advancements in Battery Materials
- Advancements in Solid Oxide Fuel Cells
- Radiation Effects in Electronics
- Sensorless Control of Electric Motors
- Advancements in Semiconductor Devices and Circuit Design
- Supercapacitor Materials and Fabrication
- Multilevel Inverters and Converters
- Advanced Sensor Technologies Research
- Non-Destructive Testing Techniques
- Magnetic Bearings and Levitation Dynamics
- Low-power high-performance VLSI design
- Ammonia Synthesis and Nitrogen Reduction
- Flow Measurement and Analysis
- Integrated Circuits and Semiconductor Failure Analysis
- Hydrogen Storage and Materials
- Conducting polymers and applications
- Membrane Separation Technologies
- Analytical Chemistry and Sensors
- Membrane Separation and Gas Transport
- Soft tissue tumor case studies
Hebei University
2022-2024
Tianjin University
2024
Peking University Third Hospital
2024
China National Petroleum Corporation (China)
2024
Hebei Normal University
2024
Peking University
2024
Chinese Academy of Sciences
2017-2018
University of Chinese Academy of Sciences
2017-2018
Xinjiang Technical Institute of Physics & Chemistry
2017-2018
Beijing Institute of Technology
2014-2017
It is a great challenge to construct green catalytic system for the reduction of nitro compounds corresponding amines under mild conditions. Due low energy red light, it challenging develop photocatalytic selective nitroaromatics aromatic driven by light. A bimetallic porphyrin metal–organic framework (Bi-P(Co)MOF) was characterized Fourier transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy, scanning and energy-dispersive techniques. The constructed...
Finite-state model predictive control (FS-MPC) is computationally expensive, as it uses all voltage vectors available for prediction and estimation. This paper proposes a novel finite-state model-based current (MPCC) scheme to overcome the drawbacks of FS-MPC. A reference frame based on locus when zero-voltage vector employed established reduce computational requirements; specifically, only one must be predicted compared with seven required in conventional The selection optimal direction...
Effect of total ionizing dose (TID) on single-event upset (SEU) hardness 130 nm partially depleted (PD) silicon-on-insulator (SOI) static random access memories (SRAMs) is investigated in this paper. The measurable synergistic effect TID SEU sensitivity 130-nm PD SOI SRAM was observed our experiment, even though that far less than micrometer and submicrometer devices. Moreover, cross section after irradiation has no dependence the data pattern applied during exposure: sections are...
This paper proposes an improved continuous-time model predictive control (CTMPC) of permanent magnetic synchronous motors (PMSMs) for a wide-speed range, including the constant torque region and flux-weakening (FW) region. In region, mathematic models PMSMs in dq-axes are decoupled without limitation DC-link voltage. However, FW cross-coupled together with A nonlinear is presented based on voltage angle. The solving will lead to heavy computation load digital signal processing (DSP). To...
The composites of Mg20Pr1Sm3Y1Ni10 as-quenched alloy and 3 wt.% M (M = CoS, CoS2, MoS2) catalyst were prepared by high-speed vibration ball mill. effects metal sulfides on the hydrogenation dehydrogenation dynamics alloys compared. results show that as-milled contain a large number amorphous embedded small amount nanocrystals, there are many point defects. After milling, crystal grain size in containing CoS is relatively larger, followed CoS2 MoS2 again. hydrogenation, phase crystallized to...
With the continuous development of society, demand for treating oily wastewater in oil fields to achieve resource recovery and reuse is becoming increasingly urgent. Membrane materials have become one most promising due their high separation efficiency low energy consumption.Graphene its derivatives characteristics ultra-high water flux, special physical, chemical properties, adjustable layered structure, gradually a new generation membrane that can be used sewage treatment. The interlayer...
Nowadays, the researches on permanent magnetic synchronous motors (PMSMs) as power source of electric vehicles (EVs) have obtained more and attention. Torque control technology which is one popular strategies applied in EVs raises higher standards for torque response speed accuracy PMSMs system. To tract reference quickly, a sliding mode controller can decouple q-axis d-axis currents proposed this paper. eliminate chattering phenomenon an exponential reaching law adopted. The method also...
Flow field optimization plays a vital role in improving the output performance of proton exchange membrane fuel cells (PEMFCs), especially at high current density. A streamline dot flow is proposed this study to enhance mass transfer reactant gas and compared it with parallel, rectangular dot, rhombic fields. The influence tail length block on further analyzed. results show that uniform distributions pressure oxygen molar fraction are significantly increased fields parallel field. In fields,...
Developing state-of-the-art bipolar plate (BP) structures, to optimize fluid distribution, is essential achieve better cell performance. In this study, the three-dimensional proton exchange membrane fuel (PEMFC) numerical model developed, present effects of different flow field structures at cathode side on performance, including parallel, serpentine, point, metal foam, fine-mesh, and wire-mesh fields. The distribution characteristics gas velocity, oxygen molar fraction, water content,...
Optimizing flow field structures plays a crucial role in enhancing the mass transfer of reactant gas and improving output power density proton exchange membrane fuel cells (PEMFCs). Herein, PEMFC model with three-dimensional (3D) fine-mesh is developed investigated detail using 3D computational fluid dynamics (CFD) model. The velocity, oxygen partial pressure molar fraction distribution are analyzed compared parallel field. numerical simulation results show that as porosity structure...
ABSTRACTAn enhanced flow field significantly improves reactant transfer and proton exchange membrane fuel cells (PEMFCs) performance. Metal foams with high porosity electrical conductivity are promising structures. This study aims to investigate the effect of metal foam pore density on PEMFC A three-dimensional multi-physics model holomorphic microscopic (HMMF) as a cathode was established using computational fluid dynamics (CFD). The HMMF can enhance accelerate electrochemical reaction...
AgNbO3-based materials have attracted extensive attention in energy storage due to their double hysteresis loops, but they suffer from low breakdown strength (Eb). AgNbO3 films with few defects and small thickness exhibit high Eb, which helps improve the performance. In this work, we successfully prepared thin on (110) SrTiO3 substrate using pulsed laser deposition technology. The film shows good crystalline relaxor ferroelectric behavior. A Eb up 1200 kV/cm is obtained film, contributes...