A5103165268- Ionosphere and magnetosphere dynamics
- GNSS positioning and interference
- Earthquake Detection and Analysis
- Radar Systems and Signal Processing
- Underwater Acoustics Research
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Geophysical Methods and Applications
- Ocean Waves and Remote Sensing
- Structural Analysis and Optimization
- Spectroscopy Techniques in Biomedical and Chemical Research
- Geological and Geophysical Studies
- Land Rights and Reforms
- Electrical and Bioimpedance Tomography
- Acoustic Wave Phenomena Research
- Indoor and Outdoor Localization Technologies
- Noise Effects and Management
- Advanced Optical Sensing Technologies
- Precipitation Measurement and Analysis
- Vibration Control and Rheological Fluids
- Advancements in PLL and VCO Technologies
- Environmental Changes in China
- Flow Measurement and Analysis
- Seismology and Earthquake Studies
- Atmospheric and Environmental Gas Dynamics
- Radio Wave Propagation Studies
Chongqing University of Education
2025
China University of Geosciences (Beijing)
2024
Institute of Electronics
2020
Beijing Municipal Engineering Design and Research Institute (China)
2019
Wuhan University
2014-2017
Sanofi (China)
2014
Zhejiang Normal University
2013
Institute of Oceanographic Instrumentation
2012
Shandong Academy of Sciences
2012
Beijing Institute of Technology
2011
The Hainan coherent scatter phased array radar (HCOPAR) is one of the most important radio systems Chinese Meridian Space Weather Monitoring Project (Meridian Project). located at Fuke station (19.5°N, 109.1°E, dip latitude 8.1°N), island, China, to observe field-aligned irregularities in ionospheric E- and F-regions. It operated with a peak power 54 kW uses Barker codes for good sensitivity. Its antenna composed 18×4 five-element Yagi antennas used both transmitting receiving. are arranged...
Based on the construction of Chinese Meridian Project, two mesosphere, stratosphere, and troposphere (MST) radars were designed located in Beijing Chongyang, Hubei province, China, to investigate atmospheric dynamics troposphere, mesosphere. The official names radio systems are MST radar Wuhan radar. They monostatic with an active phased antenna array consisting 576 Yagi antennas operated by a 53.8-MHz frequency. three-element arranged square grid 96-m side length form aperture 9216 m <sup...
Existing music sequence generation methods often struggle with long-range dependencies, leading to gradient vanishing or exploding, which compromises their ability capture intricate musical structures. This study integrates the Transformer model, leveraging its self-attention mechanism and position encoding incorporate global information at each time step. approach enables flexible modeling of resulting in more natural harmonically coherent sequences. First, serialized is employed transform...
In this letter, an ultrawideband ionospheric sounding system was designed for research and communication channel management. The frequency band of ionosonde ranges from high to very frequency. It can be flexibly used at both monostatic bistatic stations as a GPS receiver module integrated. design includes three major components: control system, transmitting system. operational parameters, such frequency, waveform, modulation type, manually reset. Correlation Fourier algorithms are obtain...
To combine the advantages of long detection range and small antenna array, newly designed Wuhan Ionospheric Oblique Backscattering Sounding System (WIOBSS) transmits radio waves by ionospheric reflection receives oceanic backscattered ground waves. functions operating frequency selection sea-state detection, WIOBSS can transmit interpulse coding wave frequency-modulated continuous waveforms in one hardware platform. The software system are introduced. A sky-wave over-the-horizon experiment...
The ionospheric sounding system is a type of high-frequency over-the-horizon skywave radar developed for research and HF channel management. hardware portable low-power multifunctional presented in this paper. device can be used typical spectrum monitoring at monostatic bistatic station. structure the primary module are depicted detail. Typical experimental results demonstrate that design successful researching.
Unlike the present single‐site location systems, background ionospheric parameters of which are obtained by vertical‐incident sounding or oblique‐incident sounding, a system based on technique backscatter is able to monitor large region ionosphere at single site introduced in this study. The obtains quasi‐real‐time data auto‐scaled ionograms and parametric inversion. A numeric ray‐tracing method, taking into consideration gradients electron density, has been improved calculate ground range...
A multifunctional ionosonde was designed for ionospheric scientific research and monitoring applications by the Ionospheric Laboratory of Wuhan University during 2012–2014. This is a high-frequency (HF) radar using inter-pulse phase codes linear frequency modulation with high sensitivity. The two basic sounding modes radio system are fixed mode swept mode. Both waveform optional, based on practical considerations. can be applied to study space environment, such as observe disturbance...
The Wuhan Ionospheric Oblique Backscattering Sounding System with the addition of an antenna array (WIOBSS-AA) is newest member WIOBSS family. It a multi-channel radio system using phased-array technology. transmitting part this applies composed five log-periodic antennas to form beams that span area northwest radar site. hardware and first ionosonde in family are introduced detail paper. An ionospheric detection experiment was carried out Chongyang, Hubei province, China on 16 March 2015...
A new water level measuring system, using laser rangefinder sensor with phase method as without cooperative target is presented. The laboratory and field experiments have been done to confirm the application accuracy of system. results show that could reach ±1.5 mm in calm case turbidity value greater than 300 NTU. Furthermore, can ±3mm for period taking 5 minute surface sloshing. maximum distance system 12m.
A new digital ionosonde based on direct digitization has been developed in the Electronic Information School of Wuhan University. There is no stage frequency translation between baseband and radio frequency, realization greatly simplifies architecture to achieve optimized design. It compared with traditional superheterodyne various aspects, such as hardware structure, signal processing, system parameters, experimental results. In end, there a summary comparison envisagement ionosonde.
The ionospheric disturbances during the total solar eclipse of 22 July 2009 were observed by two ground-based high-frequency radio systems in Wuhan, China. An ionosonde recorded ionogram every 5 min; Wuhan Ionospheric Oblique Backscattering Sounding System detected echo range and Doppler variations with 1-min period. We found that periodic fluctuation top penetration frequency Es (fEs) irregularities spread appeared disappeared simultaneously after maximum. Moreover, wavelet analysis results...
Digital data acquisition system is a key part of the whole lidar system, which plays an important role in ensuring detecting accuracy and emphasis this paper. Lidar could detect both Raman Mie backscattering signal simultaneously. A digital designed to capture FPGA chip used as essential control time sequence process capturing data. Then transmitted into computer through USB interface, displayed real-time by dedicated software. Three channels can be programmed separately measure scattering...
According to the interpretation of 2 Ximen Island high-resolution remote sensing images in 2007 and 2010, combined with its wetland land cover use status, set up landscape classification system.Used software calculate pattern index transition matrix, analyzed dynamic past 4 years.The results show that number patches study area decreased four years, patch density is on decline, inlaid increased heterogeneity decreased, dominance porosity distribution types gradually concentrated.The...
Raman spectrometer has been widely used as an identification tool for analyzing material structure and composition in many fields. However, scattering echo signal is very weak, about dozens of photons at most one laser plus signal. Therefore, it a great challenge to design spectrum data acquisition system which could accurately receive the weak The designed this paper receives optical signals with principle photon counter detect single photon. whole consists photoelectric conversion module...
This paper presents a novel dual-channel HF radar system for ionospheric sounding, which is called Wuhan Multifunctional Ionosonde with dual channels (WMI-DC). Based on the Universal Serial Bus (USB), and high performance FPGA, this newly designed WMI-DC has complete digital structure, makes it portable flexible. And due to application of m sequence waveform, can achieve good results low power. The primary modules data processing are illustrated in detail paper. experimental indicate that...