A5103265108- Metal and Thin Film Mechanics
- Diamond and Carbon-based Materials Research
- High-Voltage Power Transmission Systems
- Physics of Superconductivity and Magnetism
- HVDC Systems and Fault Protection
- Advanced materials and composites
- Quantum and electron transport phenomena
- Hydraulic Fracturing and Reservoir Analysis
- Electric Motor Design and Analysis
- Hydrocarbon exploration and reservoir analysis
- Enhanced Oil Recovery Techniques
- Microgrid Control and Optimization
- Superconductivity in MgB2 and Alloys
- Drilling and Well Engineering
- Advanced ceramic materials synthesis
- Magnetic Bearings and Levitation Dynamics
- Power Systems and Renewable Energy
- Magnetic Properties and Applications
- Aluminum Alloys Composites Properties
- Particle Accelerators and Free-Electron Lasers
- Wind Turbine Control Systems
- Satellite Communication Systems
- Particle accelerators and beam dynamics
- Microbial Fuel Cells and Bioremediation
- NMR spectroscopy and applications
Jilin Electric Power Research Institute (China)
2022-2024
Shandong University
2016-2023
Sinopec (China)
2023
Nanjing University of Science and Technology
2023
Huazhong University of Science and Technology
2020-2022
China University of Petroleum, East China
2021-2022
Shanghai Institute of Microsystem and Information Technology
2018-2021
University of Chinese Academy of Sciences
2018-2021
Guangdong University of Technology
2018
State Key Laboratory of Metal Matrix Composites
2015
Abstract The spontaneous imbibition (SI) process in shale oil reservoirs is not only influenced by capillary force, but also the osmotic pressure between fracturing fluid and formation water nanopores media. In this study, experimental methods are used to investigate mechanisms of osmosis SI, taking into account presence initial reservoirs. To effect osmosis, SI experiments were performed on fine-grained felsic Qikou sag Dagang oilfield. Low-field NMR testers high-precision electronic...
In shale reservoirs, spontaneous imbibition is an important mechanism of fracturing fluid loss, which has impact on enhanced oil recovery and water resource demand. However, behaviors are more complicated to characterize clarify due the nanoscale effects boundary slip, oil-water interfacial heterogeneous properties caused by intermolecular interactions. A multi-relaxation-time multicomponent multiphase lattice Boltzmann method was applied investigate into oil-saturated space. The pore size,...
Short-circuit current calculation and its characteristic analysis are the foundation of selecting circuit breakers designing protection systems. First, a companion circuit-based method is presented to fast calculate short-circuit asymmetric bipolar modular multilevel converter-based multiterminal direct (MMC-MTDC) grids. With reduction whole MTDC grid into an equivalent RLC circuit, efficiently accurately solved by instead numerical integration. In addition efficiency, proposed can readily...
Existing research on high-frequency oscillation indicates that the during no-load charging of modular multilevel converter (MMC) station is primarily linked to time delay and ground capacitance AC lines. Nevertheless, a around 2000 Hz has been observed in Rudong high voltage direct current project even when lines are not connected. Except delay, there still exists another key factor oscillation, i.e., transformer stray capacitance. This paper delves into interaction among dynamics MMC...
Nb/Al-AlOx/Nb Josephson junctions are widely used in superconducting quantum interference devices and rapid single flux (RSFQ) circuits. Very large-scale RSFQ integration often has a strict requirement on wafer-scale junction qualities. In particular, Nb film stress trilayer based is critical factor affecting their this work, we develop multi-step sputtering process to prepare films with different combinations of roughness investigate the correlation between quality. method allows us almost...
Line-start permanent magnet synchronous motor has many advantages, but it two important defects are poor starting torque and synchronization capability. This paper presents a pole-changing of line-start which 6/8 stator winding. A new structure winding is designed to realize pole-changing. can eliminate braking pulsating at start-up effectively improve the motor's capability significantly. The two-dimensional (2D) finite element method (FEM) implemented design analyze motor. results show...
Shale reservoirs are characterized by low porosity and permeability, volume fracturing of horizontal wells is a key technology for the benefits development shale oil resources. The results from laboratory field tests show that backflow rate fluid less than 50%, storage amount after large-scale hydraulic positively correlated with output single well. recovery crude greatly improved means shut-in imbibition, therefore attracting increasing attention researchers. In this review, we summarize...
Superconducting single flux quantum (SFQ) circuits have been shown to offer huge advantages that are ideal for high performance computing applications. These can operate at very frequencies (tens of GHz) but consume low power (from nanowatts microwatts per gate). Energy-efficient SFQ (ERSFQ) circuits, evolved from traditional rapid (RSFQ) were invented with the goal elimination static dissipation. When compared RSFQ ERSFQ require a new biasing network includes Josephson junction(s),...
When the line-start permanent magnet synchronous motor (LSPMSM) operates stably, sudden change of load torque may result in out-of-step and supersynchronous faults. The currents stator windings rotor bars will increase under two faults, so strength demagnetization field, which is likely to cause irreversible magnets LSPMSM. This paper adopts two-dimensional finite-element method (2-D FEM) analyze characteristics LSPMSM operating points all positions are not exactly same, variation magnets'...
In this study, we investigate different technologies to measure the specific capacitances C <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">8</sub> of Nb/Al-AlO xmlns:xlink="http://www.w3.org/1999/xlink">x</sub> /Nb Josephson junctions. They involve measuring Fiske mode resonance in long junctions, superconducting quantum interference device (SQUID) resonance, and plasma resonance. We find a logarithmic relationship between junction its critical...
Superconducting quantum interference devices (SQUIDs) with 3D nano-bridge junctions can be miniaturized into nano-SQUIDs that are able to sense a few spins in large magnetic field. Among all device parameters, the inductance is key performance of SQUIDs junctions. Here, we measured critical-current flux modulation curves 12 three design types using current strip-line directly coupled SQUID loop. A best depth 71% was achieved for our Nb SQUID. From curves, extracted values stripe-line each...