A5100331917- Earthquake Detection and Analysis
- earthquake and tectonic studies
- Seismology and Earthquake Studies
- Seismic Waves and Analysis
- Geomagnetism and Paleomagnetism Studies
- Ionosphere and magnetosphere dynamics
- Adaptive optics and wavefront sensing
- Complex Systems and Time Series Analysis
- Geochemistry and Geologic Mapping
- Optical Systems and Laser Technology
- High-pressure geophysics and materials
- Stellar, planetary, and galactic studies
- Geophysics and Sensor Technology
- Knowledge Management and Technology
- Data Management and Algorithms
- Seismic Imaging and Inversion Techniques
- Geological and Geophysical Studies
- Rough Sets and Fuzzy Logic
- Radioactivity and Radon Measurements
- Sleep and related disorders
- Ultrasonics and Acoustic Wave Propagation
- Circadian rhythm and melatonin
- Optical Wireless Communication Technologies
- Solar and Space Plasma Dynamics
- Geophysical and Geoelectrical Methods
China Earthquake Administration
2016-2025
Institute of Optics and Electronics, Chinese Academy of Sciences
2010-2024
Research Institute of Petroleum Exploration and Development
2024
State Key Laboratory of Pollution Control and Resource Reuse
2019
Nanjing University
2019
China University of Geosciences (Beijing)
2013-2017
Anhui Medical University
2015
Université d'Orléans
2013
Centre National de la Recherche Scientifique
2013
Laboratoire de Physique et Chimie de l’Environnement et de l’Espace
2013
This paper is related to the use of ionospheric density variations tentatively predict earthquakes. The results this statistical analysis are presented as a function various parameters. ion was recorded by low‐altitude satellite DEMETER during more than 6 years, and search for anomalies automatically conducted with complete data set. In second time, software checked if each anomaly could correspond an earthquake. at less 1500 km from positions, until 15 days after time. earthquakes have been...
Abstract Oppositely to a previous statistical work using single time resolution of the total ion density measured onboard Detection Electro‐Magnetic Emissions Transmitted from Earthquake Regions (DEMETER) satellite, this deals with seismo‐ionospheric influences by comparing different parameters and various resolutions. The O + electron recorded China Seismo‐Electromagnetic Satellite (CSES) for more than one year DEMETER satellite about 6.5 years have been utilized globally search ionospheric...
<title>Abstract</title> Electromagnetic precursor anomalies are an important indicator for earthquake prediction, with numerous observations, simulations, and theoretical studies available. However, the generation process of electromagnetic waves, particularly their frequency characteristics, before has not been thoroughly studied. This issue is crucial in determining whether signal can penetrate stratum, significantly impacting research on prediction. paper explores waves generated...
A large number of various precursors have been reported since the Wenchuan MS 8.0 earthquake (EQ) took place on 12 May 2008 in China. In this work, previous investigations both ground-based electromagnetic (EM) parameters and spatial ionospheric were first examined. The statistical results showed that anomalies presented different time-scale variations but tended to be characterized by a common feature – reaching their climax 9 May, three days before event, which indicates...
Two large earthquakes, the Maduo MS 7.4 earthquake and Menyuan 6.9 earthquake, have been successfully recorded on Chinese mainland, since data of CSES satellite were put into service for prediction work mainland at end April 2020. Obvious variations in O+ density electron found during our weekly processing 5–11 May 2021 28 December 2021–2 January 2022, respectively. warnings impending events around anomalous areas within two weeks had reported immediately after anomaly appearance. The...
This research aims to statistically investigate seismo-ionospheric influence related strong earthquakes with different focal mechanisms. The nighttime O+ density and electron density, measured by the CSES satellite for about 3 years DEMETER 6 years, were utilized globally search ionospheric perturbations datasets. Data on M ≥ 6.0 mechanism information within a ±45° geographic latitude collected during periods considered. A comparison was automatically performed using software correlate these...
Abstract. A three-layer (Earth–air–ionosphere) physical model, as well a two-layer (Earth–air) is employed in this paper to investigate the ionospheric effect on wave fields for finite length dipole current source co-located at hypocenter depth and along main fault of an earthquake when distance between epicenter observing station up 1000 km or even more. The results show that all electrical are free effects different frequencies relative short range, e.g., ∼ 300 f = 1 Hz, implying influence...
Insomnia is a serious worldwide health problem that often comorbid with anxiety. The purpose of the present study was to evaluate efficacy Chinese formula containing Suan Zao Ren Tang (SZRT) and Zhi Zi Chi (ZZCT; SZR-ZZC) for improving sleep quality anxiety states four indices Polysomnography (PSG), Severity Index (ISI), Pittsburgh Sleep Quality (PSQI), Self Rating Anxiety Scale (SAS). Methods. A randomized, parallel-controlled trial compared SZR-ZZC lorazepam tablet in insomniacs Patients...
Upon obtaining a relatively low false discovery rate (FDR) of alarms and negative (FNR) earthquakes, several previous long-term statistical researches concluded that ionospheric perturbations recorded by satellites are statistically related to earthquakes. However, overly large time-space windows for correlating with earthquakes will also contribute FDR FNR. In this study, new score - the number non-randomly successful is used quantitatively describe sensitivity Electron Density...
In this study, 117,718 ionospheric perturbations, with a space size (t) of 20–300 s but no amplitude (A) limit, were automatically globally searched via software utilizing ion density data measured by the DEMETER satellite for over 6 years. The influence geomagnetic storms on ionosphere was first examined. results demonstrated that can enhance positive irregularities rarely induce plasma variations more than 100%. probability PERs falling in 200–300 (1400–2100 km if velocity 7 km/s is...
The 127-element adaptive optical system, which consists of a tracking loop with tip-tilt mirror, system and processor, wavefront correction deformable Hartmann-Shack sensor, had been developed integrated into the 1.8m astronomical telescope in September 2009. First observations on high resolution imaging for stars done from 23 2009 first light to March 2010. In this paper, is described briefly star observation results run are reported. show angular can attain or approach diffraction limit at...
Data uncertainty is widespread in real-word applications. It has captured a lot of attention, but little job been paid to the research cost sensitive algorithm on uncertain data. The paper proposes novel cost-sensitive Naive Bayes CS-DTU for classifying and predicting datasets. In paper, we apply probability statistics theory data model, define utility attribute total cost, propose new test strategy selection algorithm. Experimental results UCI Datasets demonstrate proposed can effectively...
The hourly data of the vertical <italic>Z</italic> and horizontal <italic>H</italic> components 37 ground–based DC–ULF geomagnetic stations are examined during 20 April–12 May 2008. On 9 2008, three days before Wenchuan <italic>M</italic><sub>S</sub> 8.0 shock, anomalies — a double low-point decreased amplitude registered on curves component at 25 in large-scale area surrounding epicentral area. H shows none phenomenon but does exhibit reduced magnitude same time. index <italic>Kp</italic>...
For better understanding and forecasting of the solar activity corresponding impacts human technologies life on earth, high resolution observations for Sun are needed. The Chinese Large Solar Telescope (CLST) with 1.8 m aperture is being built. CLST a classic Gregorian configuration telescope open structure, alt-azimuth mount, retractable dome, large mechanical de-rotator. optical system all reflective design has field view larger than 3 arc-minute. primary mirror honeycomb sandwiches fused...
In this paper, electromagnetic emissions recorded by a borehole TOA installment with three observing channels of CH1 (0.01 - 0.1 Hz), CH2 (0.1 1.0 Hz) and CH3 (1 9 kHz) before four large earthquakes magnitudes more than 8.0 have been depicted. These abnormities present different fluctuating processes from one another. For the Wenchuan MS earthquake on 12 May 2008, nearest among these events only 660 km station, information appeared at least 5 months ago in two low frequency bands it was...
Abstract. Taylor's power law (TPL) describes the scaling relationship between temporal or spatial variance and mean of population densities by a simple law. TPL is widely testified across space time in biomedical sciences, botany, ecology, economics, epidemiology, other fields. In this paper, analytically reconfirmed testifying as function released energy earthquakes with different magnitudes on varying timescales during Wenchuan earthquake sequence. Estimates exponent are approximately 2,...
Abstract. Taylor's power law (TPL) describes the scaling relationship between temporal or spatial variance and mean of population densities by a simple law. TPL has been widely testified across space time in biomedical sciences, botany, ecology, economics, epidemiology, other fields. In this paper, is analytically reconfirmed testifying as function released energy earthquakes with different magnitudes on varying timescales during Wenchuan earthquake sequence. Estimates exponent are...
Abstract. Continuously to a previous work on qualitatively investigating the probable electromagnetic interacting process among lithosphere, atmosphere and ionosphere, this aims quantitatively establish an coupling model these three spheres prior Wenchuan earthquake. Firstly, underground finite length electrical dipole in half-space has been employed estimate possible “energy source” for observable 1.3 mV m-1 field registered at 1440 km Gaobeidian station during event. The result shows that...
The wide field adaptive optics system for solar observations had been developed and put in routine operation at the 1-meter New Vacuum Solar Telescope (NVST) Fuxian Lake, Yunnan Observatory. This adopts configuration based on high order ground layer correction loop low altitude loop. Three modes, namely conventional (CAO), (GLAO), multi-conjugate (MCAO) with three layers correction, can be chosen science requirement. DM is inherited from 151-element AO system, two new DMs are added...
The AO progresses for astronomy in the Key Laboratory of Adaptive Optics, Chinese Academy Sciences are reported this presentation. For night-time astronomical observations, recent technological developments, such as Laser Guide Star, Pyramid Sensor and Deformable Secondary Mirror, introduced. solar researches also presented day-time observations. Furthermore, we will show on-sky high resolution observational results 1.8m telescope at Gaomeigu site, Yunnan Observatory 1-m New Vacuum Solar...