A5036012090- Neuroscience and Neural Engineering
- Advanced Sensor and Energy Harvesting Materials
- Advancements in Transdermal Drug Delivery
- Hydraulic Fracturing and Reservoir Analysis
- Neural dynamics and brain function
- Dermatology and Skin Diseases
- Hydrocarbon exploration and reservoir analysis
- Superconducting Materials and Applications
- Conducting polymers and applications
- Physics of Superconductivity and Magnetism
- Drilling and Well Engineering
- EEG and Brain-Computer Interfaces
- Ultrasonics and Acoustic Wave Propagation
- Ocular Surface and Contact Lens
- Welding Techniques and Residual Stresses
- Non-Destructive Testing Techniques
- Enhanced Oil Recovery Techniques
- HVDC Systems and Fault Protection
- Muscle activation and electromyography studies
- Microbial Inactivation Methods
- Grouting, Rheology, and Soil Mechanics
- Rock Mechanics and Modeling
- Structural Behavior of Reinforced Concrete
- Hydraulic and Pneumatic Systems
- Rheology and Fluid Dynamics Studies
Peking University
2019-2025
University of Manchester
2020-2024
Tianma Microelectronics (China)
2023-2024
Beijing Advanced Sciences and Innovation Center
2023-2024
National Center for Nanoscience and Technology
2022-2023
China National Petroleum Corporation (China)
2022
Institute of Microelectronics
2020-2021
Beijing Institute of Petrochemical Technology
2021
Tongji University
2003-2020
University of Northampton
2020
Highlights Polyimide-based flexible microneedle array (PI-MNA) electrodes realize high electrical/mechanical performance and are compatible with wearable wireless recording systems. The normalized electrode–skin interface impedance (EII) of the PI-MNA reaches 0.98 kΩ cm 2 at 1 kHz 1.50 10 Hz, approximately 1/250 clinical standard electrodes. This is first report on study applied to long-term continuous monitoring for polysomnography. Abstract Microneedle (MNA) an effective solution achieve...
Microneedles, especially hollow microneedles (HMNs), play an important role in drug delivery, but most of the current HMNs are manufactured based on silicon microfabrication (lithography, etching, etc.), which slightly conservative due to lack low-cost, batch-scale and customized preparation approach, for with flexible substrate. For first time, we propose use a high-precision 3D printed master mold followed by dual-molding process different shapes, heights, inner outer diameters satisfy...
Microneedles are able to penetrate into the skin and offer great chances in various biomedical applications including transdermal drug delivery, stable bio-signal monitoring, sampling bio-sensing. Owing micro-scale feature size, microneedles have advantages of minimal invasiveness, pain, high biosafety simple operation. However, it is still challenging fabricate solid on a flexible substrate. This review primarily introduces recent studies about substrate, fabrication methods micromolding,...
Electromagnetic sensors have been used for inspecting small surface defects of metals. Based on the eddy-current (EC) thin-skin regime, a revised algorithm is proposed triple-coil drive-pickup EC sensor scanning over long crack slots (10 mm) with different rotary angles. The method validated by voltage measurement designed benchmark (ferromagnetic) steel depths and With an additional sensing coil sensor, defect angle (or orientation) can be measured without spatially coaxially rotating...
Abstract Cardiovascular diseases are a leading cause of death globally, often diagnosed using electrocardiography(ECG). However, traditional ECG methods lack the spatial resolution needed for detecting heart conditions. Recently advancements in flexible, on-skin electrode technologies have improved signal acquisition quality. In this work, flexible 64-channel microneedle array dry based on micro-molding method is introduced easily, high-density and long-term acquisition. At most 768 channels...
Pulsed eddy current is based on the electromagnetic induction principle, which widely used in metal industry for non-destructive testing due to its unique advantages, such as fast response, great penetration depth, and lift-off tolerance. Eddy diffuses a complex manner with diffusion velocity uneven space time. A full picture of field enhances physical insights into pulsed detection. This paper proposes novel point tracing method calculation. The process divided three stages their fields are...
Control point image locating accuracy of calibration plate is one the major factors which determine camera calibration. Thus we can improve by control plate. And an improved Harris sub-pixel corner detection algorithm put forward to accuracy. Initial location using implemented at first, and then used realize Corner points' coordinate values are gotten means initial fine location. The result examine show that precision greatly through chessboard image, detection.
Monitoring sleep conditions is of importance for quality evaluation and disease diagnosis. Accurate respiration detection provides key information about conditions. Here, we propose a perforated temperature sensor that can be worn below the nasal cavity to monitor breath. The sensing system consists two sensors, signal conditioning circuits, transmission module, supporting analysis algorithm. structure effectively enhances sensitivity shortens response time. sensor’s time 0.07 s in air...
Superconducting Conductor on Round Core (CORC) cables fabricated by several high temperature superconducting (HTS) tapes are able to carry enormous electrical current density, be widely used in a variety of applications such as power transmission, fusion, and magnetic resonance imaging (MRI). However, the AC losses induced under alternating or field generate heat dissipation which can reduce electric efficiency. Therefore, it is essential analyze loss behavior CORC well consider methods it....
Most energy-saving testing methods for plunger pumps use hydraulic motors. The loading test of coal mine emulsion generally uses an overflow valve as the unit, which is characterized by high energy consumption. pump transmission medium, and viscosity lubricity are much lower than those oil, creates great difficulties in development water-based products. nominal flow rate motor smaller that pump, there no mature reliable control valve. Based on above reasons, traditional cannot be utilized...
Water has the disadvantages of low viscosity, poor lubrication, and easy leakage, which leads to many problems in water hydraulic flow control valves, such as working pressure large fluctuations. To address these issues, this paper proposes a novel digital valve. The valve uses linear stepper motor driving device. Compared proportional electromagnets, thrust stroke are larger, making more suitable for high-pressure conditions. Simultaneously, innovatively incorporates set pilot spool strings...
In this work, we propose a minimally invasive dry flexible electrode device containing micro-needle array entirely based on polyimide (PI-MNA) for surface bio-potential sensing and monitoring. Owing to the spiky tips, extensibility biocompatibility, gold-coated PI needles are able penetrate high resistivity stratum corneum realize low-impedance nontoxic skin-electrode contact without tedious skin-preparation severe invasiveness. The PI-MNA was mainly fabricated via twice of conformal...
To explore the methodology for improving ultralow permeability reservoir recovery, cores of reservoirs in China’s Ordos Basin were selected to study dynamic imbibition micromechanism crude oil nanopore throat through core-flooding laboratory experiment and nuclear magnetic resonance (NMR) observation. In meantime, microimbibition characteristics discharge between matrix fracture partially closed boundary simulated utmostly reflect actual conditions. Our findings suggest that serves core...
The High Temperature Superconducting (HTS) Conductor on Round Core (CORC) cables have been widely utilized to fabricate various superconducting applications for power transmission, fusion, and magnets with high current density. Understanding the AC loss behavior of CORC during cable design process is essential analyzing its electromagnetic performance evaluating future industry potential. aim our research investigate dependence caused by magnitude frequency applied external variations...
In this paper, we proposed a flexible and wearable sensor integrating an annular interdigital electrode carbon black-PDMS sensitive film with micro-pyramid array. The device has two shielding layers sensing layer, which are fabricated by the PCB process to realize low-cost rapid manufacturing. structure layer significantly improves capacitance value sensitivity compared conventional rectangular structure. using black (CB)-PDMS hybrid material greatly increases of as well, resulting from...
This paper reports a novel intracortical neural interface comprising 10×10 metal-based micro-needle electrode array (M-MNEA) with the pitch of 500 μm, and height ranging from hundreds microns to millimeters. The diameters body tip end needle are 200 μm ~10 respectively. low-cost fabrication process device contains simple techniques without any step lithography or complex etching. Meanwhile, owing Au coating sites Parylene insulating layer on bodies, M-MNEA ensures biocompatibility safety...
The advancements in technology have made it possible to automatically record and store large amount of data, which has resulted a need for development application efficient data analysis techniques. Unsupervised clustering methods proven be capable extracting useful information from various types sizes datasets. This paper investigates the performance standard agglomerative hierarchical algorithm using two time series datasets electric power system neuroscience area. main steps procedure are...
Electromagnetic sensors have been used for inspecting small surface defects of metals. Based on the eddy-current thin-skin regime, a revised algorithm is proposed triple-coil drive-pickup sensor scanning over long crack slots (10 mm) with different rotary angles. The method validated by voltage measurement designed EC benchmark (ferromagnetic) steel depths and With an additional sensing coil sensor, defect angle (or orientation) can be measured without spatially coaxially rotating excitation...