A5100725636- Advanced MEMS and NEMS Technologies
- Mechanical and Optical Resonators
- Geophysics and Sensor Technology
- Acoustic Wave Resonator Technologies
- Analytic Number Theory Research
- Inertial Sensor and Navigation
- Seismic Imaging and Inversion Techniques
- Geophysics and Gravity Measurements
- Seismic Waves and Analysis
- Advanced Fiber Optic Sensors
- Algebraic Geometry and Number Theory
- Photonic and Optical Devices
- Elasticity and Material Modeling
- Mathematical Dynamics and Fractals
- Medical Imaging Techniques and Applications
- Finite Group Theory Research
- Advanced Measurement and Metrology Techniques
- Geophysical and Geoelectrical Methods
- Advanced Algebra and Geometry
- Hydraulic Fracturing and Reservoir Analysis
- Planetary Science and Exploration
- Radiation Detection and Scintillator Technologies
- Geophysical Methods and Applications
- High-pressure geophysics and materials
- Advanced Mathematical Identities
Huazhong University of Science and Technology
2012-2025
Zhejiang University
2005-2024
Schlumberger (British Virgin Islands)
2024
Shandong Normal University
2019-2024
State Key Laboratory of Modern Optical Instruments
2007-2024
Chevron (China)
2024
North University of China
2024
Steklov Mathematical Institute
2023
Southwest Petroleum University
2023
Chevron (United States)
2018-2022
SUMMARY We developed an integrated technique for estimating crustal anisotropy with a horizontal axis using radial (R) and transverse (T) receiver functions. The includes computing three individual one joint objective function (JOF) reliability analysis of the estimated anisotropy. functions (IOFs) are designed to: (1) maximize peak energy stacked R after cosine moveout correction in the Ps arrival time; (2) to correlation full or (3) minimize total removal JOF was computed by weighted...
Abstract Precise measurement of variations in the local gravitational acceleration is valuable for natural hazard forecasting, prospecting, and geophysical studies. Common issues present gravimetry technologies include their high cost, mass, large volume, which can potentially be solved by micro-electromechanical-system (MEMS) technology. However, reported MEMS gravimeter does not have a sensitivity dynamic range comparable with those commercial gravimeters, lowering its practicability...
Knowledge of the distribution and dissemination antibiotic resistance genes (ARGs) is essential for understanding anthropogenic impacts on natural ecosystems. The transportation ARGs via aquatic environments significant has received great attention, but whether there been ARG pollution to hadal ocean ecosystem not well explored. For investigating ecological health concerns, we profiled occurrence in sediments Mariana Trench (MT) (10 890 m), deepest region ocean. Metagenomic-based profiles...
Personalized noninvasive imaging of subject-specific cardiac electrical activity can guide and improve preventive diagnosis treatment arrhythmia. Compared to body surface potential (BSP) recordings electrophysiological information reconstructed on heart surfaces, volumetric myocardial transmembrane (TMP) dynamics is greater clinical importance in exhibiting arrhythmic details arrythmogenic substrates inside the myocardium. This paper presents a physiological-model-constrained statistical...
This paper presents an angular-acceleration sensor that works as either angular accelerometer or a gravity gradiometer and is based on the micro electromechanical system (MEMS) technology. The changes in angle of mass are sensed by rotational capacitive array transducer formed electrodes both stator rotor dies flip-chip-bonded MEMS chip (21 mm × 12.5 1 mm). prototype was characterized, demonstrating fundamental frequency 27 Hz, quality factor 230 air, sensitivity 6 mV/(rad/s2). demonstrated...
In positron emission tomography (PET) reconstruction, the integration of time-of-flight (TOF) information, known as TOF-PET, has been a major research focus. Compared to traditional reconstruction methods, introduction TOF enhances signal-to-noise ratio images. Precision in is measured by full width at half maximum (FWHM) and offset from ground truth, referred coincidence time resolution (CTR) bias.
Myocardial infarction (MI) creates electrophysiologically altered substrates that are responsible for ventricular arrhythmias, such as tachycardia and fibrillation. The presence, size, location, composition of infarct scar bear significant prognostic therapeutic implications individual subjects. We have developed a statistical physiological model-constrained framework uses noninvasive body-surface-potential data tomographic images to estimate subject-specific transmembrane-potential (TMP)...
Cost-effective waveform modeling is the key to practical reverse time migration (RTM) and full-waveform inversion (FWI) implementations. We evaluated an explicit evolution (ETE) method efficiently simulate wave propagation in acoustic media with high temporal accuracy. started from constant-density equation obtained analytical time-marching scheme wavenumber domain. then formulated ETE time-space domain by introducing a cosine function approximation. Although operator appears be similar...
This paper describes a novel electrostatically actuated microgripper with freeform geometries designed by genetic algorithm. new semiautomated design methodology is capable of designing near-optimal MEMS devices that are robust to fabrication tolerances. The use algorithm significantly improves the performance microgripper. An experiment shows has large displacement (91.5 μm) low actuation voltage (47.5 V), which agrees well theory. and can handle micro-objects size from 10 100 μm. A...
Many of the computer vision algorithms have been posed in various forms differential equations, derived from minimization specific energy functionals, and finite element representation computation become de facto numerical strategies for solving these problems. However, cases where domain mappings between iterations or image frames involve large geometrical shape changes, such as deformable models object segmentation nonrigid motion tracking, may exhibit considerable loss accuracy when mesh...
We demonstrate a microseismometer with 2ng/rtHz noise floor capable of autonomous operation over wide range tilts. This represents the highest performance yet achieved by silicon-based vibration sensor. The builds on previous development short-period seismometer for NASA's 2016 InSight mission to Mars. deep-reactive-ion-etched sensor element is unique in that it uses spring-mass system proof mass moves laterally. minimizes damping spring systems without need vacuum encapsulation. proof-mass...
This paper presents a micromachined micro-g capacitive accelerometer with silicon-based spring-mass sensing element. The displacement changes of the proof mass are sensed by an area-variation-based transducer that is formed matching electrodes on both movable die and glass cover plate through flip-chip packaging. In order to implement high-performance accelerometer, several technologies applied: through-silicon-wafer-etching process used increase weight for lower thermal noise, connection...
High-precision microelectromechanical inertial sensors based on spring-mass structures are of great interests for a wide range applications, including navigation, disaster warning and resource exploration. Lowering the resonant frequency is essential to further improve sensitivity sensors. However, conventional approaches facing insurmountable difficulties from size reduction machining precision. This paper proposed novel quasi-zero-stiffness mechanism that compatible with MEMS technologies...