A5050801650- Vacuum and Plasma Arcs
- Photonic and Optical Devices
- Electrical Fault Detection and Protection
- Advanced Photonic Communication Systems
- HVDC Systems and Fault Protection
- Optical Network Technologies
- High-Voltage Power Transmission Systems
- Semiconductor Lasers and Optical Devices
- Smart Grid and Power Systems
- Lightning and Electromagnetic Phenomena
- Industrial Technology and Control Systems
- Power Systems Fault Detection
- Semiconductor Quantum Structures and Devices
- Photonic Crystals and Applications
- Advanced Fiber Laser Technologies
- Metallurgy and Material Forming
- Optical Wireless Communication Technologies
- Electrostatic Discharge in Electronics
- Civil and Geotechnical Engineering Research
- Advanced Sensor and Control Systems
- Combustion and Detonation Processes
- High voltage insulation and dielectric phenomena
- Manufacturing Process and Optimization
- Hydraulic and Pneumatic Systems
- Geoscience and Mining Technology
Jiangxi Maternal and Child Health Hospital
2024-2025
Zhejiang University
2025
Liaoning Technical University
2024
Dalian University of Technology
2014-2023
Chinese Research Academy of Environmental Sciences
2023
Rensselaer Polytechnic Institute
2011-2022
Wenzhou Medical University
2010-2022
Sun Yat-sen University
2021
Pearl River Hydraulic Research Institute
2020
Dalian University
2019
Background The role of sperm DNA fragmentation index (DFI) in fertility remains controversial. Herein, we analyzed its association with semen parameters, embryonic development, and pregnancy outcomes after vitro fertilization (IVF) treatment. Additionally, assessed whether DFI had a potential impact on long-term maternal neonatal complications. Methods A total 5,271 women who underwent IVF treatment for the first time between October 1, 2020, July 31, 2023, were included from an academic...
From cell phones to biomedical systems, modern life is inexorably dependent on the complex convergence of technologies into stand-alone products designed provide a complete solution in small, highly integrated systems with computing, communication, and consumer functions. The concept system-on-package (SOP) originated mid-1990s at NSF-funded Packaging Research Center Georgia Institute Technology. This can be thought as conceptual paradigm which package, not bulky board, system package...
Abstract Performance evaluation for the lightning location system (LLS) of power grid in Guangdong Province, China, was conducted based on observation data triggered flashes obtained Conghua, Guangzhou, during 2007–11 and natural to tall structures Guangzhou 2009–11. The results show that flash detection efficiency stroke were about 94% (58/62) 60% (97/162), respectively. arithmetic mean median values error estimated be 710 489 m, respectively, when more than two reporting sensors involved...
Although previous studies have shown that sleep can inspire insight, it is still unclear whether meditation promote insight. Meditation differs from other types of passive rest such as relaxation and because requires full consciousness mindfulness targets one’s breathing. Forty-eight university students without experience were recruited to learn a simple technique. They given list 10 insight problems solve (the pre-test session). In this study, we focused on the unsolved examined if they...
Forty‐five unconnected upward leaders (UULs) occurred in 19 downward negative flashes are analyzed. Each observed UUL is initiated by a stepped leader before new strike point struck. For each UUL, several parameters determined when possible mainly using high‐speed images: inception height, time prior to return stroke (RS), horizontal distance from the flash's point, two‐dimensional (2D) between nearest branch tip and UUL's at its time, 2D length, average propagation velocity. Their values...
We have designed a simplified true-time-delay beamforming architecture using integrated photonics for phased-array antennas. This can independently control multiple RF beams simultaneously with only single tuning parameter to steer the beam in each direction beam. made proof-of-the-principle demonstration of an X-band, 30×4-elements, fiber-optics-based beamformer one-dimensional steering transmission mode. The goal is develop semiconductor-based photonic circuit so that 2D array both...
In this letter, we have experimentally demonstrated a Reed-Solomon (RS) coded and multiple symbol interleaved real-time orthogonal frequency-division multiplexing (OFDM) signals transmission over single mode fiber (SMF)-based directdetection optical system. To the best of our knowledge, is first time to realize forward error correction (FEC) in OFDM systems. The bit rate (BER) performances RS-coded are investigated low-cost directly modulated laser-based direct-detection experimental results...
This paper investigates the influence of axial magnetic field (AMF) arc control on voltage distribution (VD) double-break vacuum circuit breakers (VCBs) in order to gain balanced VD, and thus enhance breaking capacity. The interaction plasma, postarc current (PAC), AMF is discussed. We conduct test VCBs with externally applied a different pulsewidth, magnitude, moment. PAC, charge, VD are measured analyze relationship between VD. optimal magnitude unbalanced ratio gained when grading...
Abstract Background and Aims Influenza is one of the most widespread respiratory infections poses a huge burden on health care worldwide. Vaccination key to preventing controlling influenza. vaccine hesitancy an important reason for low vaccination rate. In 2019, Vaccine was identified as top 10 threats global by World Health Organization. However, there remains glaring scarcity bibliometric research in that regard. This study sought identify hotspots future development trends influenza...
A detailed survey of erosion and deposition on plasma-facing components was performed in the TEXTOR tokamak. Co-deposits dust particles were collected from graphite limiters several locations Inconel liner. The total amount (loose material), originating mainly carbon-rich co-deposits detached liner, around 2 g, with sizes 0.1 μm to 1 mm. morphology fuel retention determined using microscopy methods, ion beam analysis thermal desorption spectrometry. study revealed differences structure...
This paper focuses on the vacuum arc commutation between and parallel-connected insulated gate bipolar transistor (IGBTs) of dc microgrid hybrid circuit breakers (HCBs). The principle HCB is analyzed important process in interruption, which arcing time interrupting are depended. test established by simplifying IGBTs to an on-state resistance with large thermal capacity. influence magnitude main current, IGBTs, externally applied transverse magnetic field (TMF) investigated electrical measure...
Hybrid circuit breaker (HCB) technology based on a vacuum interrupter and SF6 in series has become new research direction because of the low-carbon requirements for high voltage switches. The an excellent ability to deal with steep rising part transient recovery (TRV), while can withstand peak easily. An HCB take advantage interrupters current interruption process. In this study, model ion diffusion equations, density equation, modified Cassie-Mayr arc equation is explored. A simulation...
We design and theoretically analyze a heterojunction bipolar transistor (HBT) electro-optic (EO) modulator with composition graded SiGe base. The waveguide has large cross-section of 1 microm for ease fiber alignment. At base-emitter bias V BE = 2.5 V, pi-phase shift requires 74.5 interaction length TM polarization at lambda 1.55 microm. total optical attenuation is 3.9 dB to achieve in this condition. This device expected operate switching speed 2.4 GHz.
In this paper, we compare the power consumption of a "line-of-sight" free space optical (FSO) link and radio frequency (RF) data link. We investigate 2.5 Gbps line-of-sight FSO interconnection, which consists vertical cavity surface emitting laser (VCSEL) driver (MAX3795), VCSEL diode (LD), PIN photodiode (PD), transimpedance amplifier (MAX3864), limiting (MAX3746). It is shown that total about 370.6 mW in simple NRZ on-off keying (OOK) modulation format. Different lens configurations are...
The paper proposes a novel post-arc current measuring equipment (NPACME), which is based on the vacuum arc commutation and magnetic blow. NPACME composed of circuit breaker (VCB), shunt resistor, protective gap, high-precision sensor externally applied transverse field (ETMF). prototype designed controlled by optical fiber communications. between resistor with ETMF investigated. test platform established in synthetic short-circuit observed high speed CMOS camera. mathematic description...
Here, a DC vacuum arc interruption test based on the hybrid high-speed actuator and method of commutation is carried out in synthetic loop system. The safe stroke one basic breaking parameters. minimum directly determines time property mechanical circuit breaker. main breaker switch driven by electromagnetic repulsion actuator. In order to simplify its control system, also adopts switch. current source for verification this system provided LC oscillator with lower frequency. Simulations some...