A5055379843- Laser-induced spectroscopy and plasma
- Analytical chemistry methods development
- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Natural Language Processing Techniques
- Topic Modeling
- Cultural Heritage Materials Analysis
- Optical Coherence Tomography Applications
- Ion-surface interactions and analysis
- Spectroscopy and Chemometric Analyses
- Robotics and Sensor-Based Localization
- Advanced Photonic Communication Systems
- Optical Network Technologies
- Computational and Text Analysis Methods
- Planetary Science and Exploration
- Spectroscopy Techniques in Biomedical and Chemical Research
- Anomaly Detection Techniques and Applications
- Advanced Neural Network Applications
- Speech Recognition and Synthesis
- Mass Spectrometry Techniques and Applications
- COVID-19 diagnosis using AI
- Software Testing and Debugging Techniques
- Speech and dialogue systems
- Software Engineering Research
Washington University in St. Louis
2025
Shanghai Jiao Tong University
2020-2024
Affiliated Hospital of Nantong University
2024
Nantong University
2024
Anhui University
2024
Wuhan University of Science and Technology
2024
Nanjing University of Information Science and Technology
2021-2023
China Tobacco
2021-2023
Fujian Agriculture and Forestry University
2023
Ministry of Education of the People's Republic of China
2023
The Internet of Vehicles (IoV) plays a crucial role in providing diversified services because its powerful capability collecting real-time information. Generally, collected information is transmitted to centralized resource-intensive cloud platform for service implementation. Edge Computing (EC) that deploys physical resources near road-side units involved IoV support vehicular users. Additionally, many measures are adopted optimize the performance EC-enabled IoV, but they hardly help make...
Phase-sensitive optical time-domain reflectometry (Φ-OTDR) has attracted numerous attention due to its superior performance in detecting the weak perturbations along fiber. Relying on ultra-sensitivity of light phase tiny deformation fiber, Φ-OTDR been treated as a powerful technique with wide range applications. It is fundamental extract scattering wave accurately and methods include coherent detection, I/Q demodulation, 3 by coupler, dual probe pulses, so on. Meanwhile, researchers have...
Early-stage screening and diagnosis of ovarian cancer represent an urgent need in medicine. Usual ultrasound imaging antigen CA-125 test when prescribed to a suspicious population still require reconfirmations. Spectroscopic analyses blood, at the molecular atomic levels, provide useful supplementary tests coupled with effective information extraction methods. Laser-induced breakdown spectroscopy (LIBS) was employed this work record elemental fingerprint human blood plasma. A machine...
Spectra covering the observed wavelength range ≲3800 to ≳9400 Å have been obtained for a complete, flux-limited sample of 64 sources that has studied extensively at radio wavelengths high angular resolution. The is now completely identified—four new finding charts are given, and one source was identified spectroscopically. spectra were with 200 inch Hale telescope, primarily Double Spectrograph, spectral resolution about 9 short 18 long wavelengths. Redshifts known 62 sources; tentative...
With the ChemCam instrument, laser-induced breakdown spectroscopy (LIBS) has successively contributed to Mars exploration by determining elemental compositions of soil, crust and rocks. Two new lunched missions, Chinese Tianwen 1 American Perseverance, will further increase number LIBS instruments on after planned landings in spring 2021. Such unprecedented situation requires a reinforced research effort methods spectral data treatment. Although matrix effects correspond general issue LIBS,...
This paper proposes a real-time multi-class disturbance detection algorithm based on YOLO for distributed fiber vibration sensing. The achieves of event location and classification external intrusions sensed by optical sensing system (DOFS) phase-sensitive time-domain reflectometry (Φ-OTDR). We conducted data collection under perimeter security scenarios acquired five types events with total 5787 samples. is used as spatial-temporal image in the training our proposed YOLO-based model (You...
Phase-sensitive optical time-domain reflectometry (Φ-OTDR) has been proposed for distributed vibration sensing purpose over recent years. Emerging applications, including seismic and hydroacoustic wave detection, demand accurate low-frequency reconstruction capability. We propose to use the direct-detection Φ-OTDR configuration achieve quantitative demodulation of external vibrations by phase-shifted dual-pulse probes. Simultaneous pulsing phase shifting modulation is realized with a single...
The Zhurong rover of the Tianwen-1 mission landed in southern Utopia Planitia, providing a unique window into evolutionary history Martian lowlands. During its first 110 sols, investigated and categorized surface targets igneous rocks, lithified duricrusts, cemented soils sands. analysed by using laser-induced breakdown spectroscopy onboard Zhurong, show elevated water contents distinct compositions from those rocks. duricrusts are likely formed via vapor-frost cycling at atmosphere-soil...
The YOLO series of target detection networks are widely used in transportation targets due to the advantages high accuracy and good real-time performance. However, it also has some limitations, such as poor scenes with large-scale variations, a large number computational resources being consumed, occupation more storage space. To address these issues, this study uses YOLOv8n model benchmark makes following four improvements: (1) embedding BiFormer attention mechanism Neck layer capture...
Entering text is very challenging on smartwatches, especially non-touch smartwatches where virtual keyboards are unavailable. In this paper, we designed and implemented COMPASS, a bezel-based entry technique. COMPASS positions multiple cursors circular keyboard, with the location of each cursor dynamically optimized during typing to minimize rotational distance. To enter text, user rotates bezel select keys any nearby cursors. The design was justified by an iterative process studies. Our...
A fiber-optic Mach Zehnder interferometer (MZI) refractive index (RI) sensor based on a double peanut-shaped structure in Er-doped fiber with section of tapered was fabricated using fusion splicer and experimentally demonstrated. The structures placed at both ends the function as beam splitting/combining. Besides, region works sensing area. With RI changes, optical path difference between core mode cladding modes will change correspondingly, resulting interference spectrum shifting. By...
Curvature measurement plays an important role in structural health monitoring, robot-pose measuring, etc. High-resolution curvature is highly demanded. In this paper, optical sensor with high resolution based on in-fiber Mach-Zehnder interferometer (MZI) and microwave photonic filter (MPF) proposed experimentally demonstrated. The MZI constructed a ring-core fiber (RCF) which fusion spliced between two coreless fibers (CLFs). structure of CLF-RCF-CLF then sandwiched segments single-mode...
Recent breakthroughs in large language modeling have facilitated rigorous exploration of their application diverse tasks related to tabular data modeling, such as prediction, synthesis, question answering, and table understanding. Each task presents unique challenges opportunities. However, there is currently a lack comprehensive review that summarizes compares the key techniques, metrics, datasets, models, optimization approaches this research domain. This survey aims address gap by...
The matrix effects in LIBS analyses have been considered with univariate and machine learning based multivariate regression models for TAS classification of rocks.
This work demonstrates the efficiency of machine learning in correction spectral intensity variations laser-induced breakdown spectroscopy (LIBS) due to changes laser pulse energy, such can occur over a wide range, from 7.9 71.1 mJ our experiment. The developed multivariate model led precise determination concentration minor element (magnesium for instance) samples (aluminum alloys this work) with precision 6.3% (relative standard deviation, RSD) using LIBS spectra affected by energy change....
Phase-sensitive optical time-domain reflectometry (Φ-OTDR) based on heterodyne detection is widely used for its simple structure and high signal-to-noise ratio (SNR). However, the large amount of raw data Φ-OTDR places a heavy burden storage device also limits transferability data. In this Letter, we propose an ultra-low sampling resolution technique to solve problem in Φ-OTDR. Experimental results show that phase variations induced by external vibrations can be successfully demodulated from...
As any spectrochemical analysis method, laser-induced breakdown spectroscopy (LIBS) usually relates characteristic spectral lines of the elements or molecules to be analyzed their concentrations in a material. It is however not always possible for given application scenario, rely on such because various practical limitations as well physical perturbations spectrum excitation and recording process. This actually case determination carbon steel with LIBS operated ambient gas, where intense C I...
Transfer learning allows the effective corrections of both chemical and physical matrix effects in such a way that metals with irregular surfaces can be directly analyzed by LIBS for an accurate elemental determination.
The rapid increase in the parameter counts of Large Language Models (LLMs), reaching billions or even trillions, presents significant challenges for their practical deployment, particularly resource-constrained environments. To ease this issue, we propose PIP (Perturbation-based Iterative Pruning), a novel double-view structured pruning method to optimize LLMs, which combines information from two different views: unperturbed view and perturbed view. With calculation gradient differences,...
Phase transition in parity-time (PT) symmetry is one of the most intriguing discoveries non-Hermitian physics, giving rise to plenty physical phenomena and strategies develop advanced devices systems, such as unconventional lasers, nonreciprocal transmission, enhanced sensitivity. Floquet PT-symmetric systems are characterized by time-periodic Hamiltonians, which gain or loss modulated steer PT phase, providing an additional dimension for realizing phase transitions. In this study, we...
500 GHz video transmission over 1.2 km is achieved using an astronomical telescope equipped with a quantum-limited superconducting SIS receiver.
H<sub>2</sub>O and KCl concentrations in potash have been precisely determined using LIBS online detection coupled with machine learning data processing.