A5102731913- GNSS positioning and interference
- Inertial Sensor and Navigation
- Advanced Frequency and Time Standards
- Satellite Communication Systems
- Geophysics and Gravity Measurements
- Study of Mite Species
- Soil Carbon and Nitrogen Dynamics
- Peatlands and Wetlands Ecology
- Coastal wetland ecosystem dynamics
- Freshwater macroinvertebrate diversity and ecology
- Rangeland and Wildlife Management
- Target Tracking and Data Fusion in Sensor Networks
- Maritime Navigation and Safety
- Invertebrate Taxonomy and Ecology
- Species Distribution and Climate Change
- Land Use and Ecosystem Services
- Collembola Taxonomy and Ecology Studies
- Robotics and Sensor-Based Localization
- Power Line Communications and Noise
- Educational Reforms and Innovations
- Ionosphere and magnetosphere dynamics
- Advanced Decision-Making Techniques
- Indoor and Outdoor Localization Technologies
- Climate change and permafrost
- 3D Surveying and Cultural Heritage
Chinese Academy of Sciences
2012-2025
Northeast Institute of Geography and Agroecology
2018-2025
Sichuan University
2024
Peking University
2024
Shanghai Electric (China)
2024
Aerospace Information Research Institute
2021-2023
Suzhou University of Science and Technology
2023
Nanyang Technological University
2022
Beijing Jiaotong University
2022
Academy of Opto-Electronics
2012-2022
As the Global Navigation Satellite System (GNSS) is widely used in all walks of life, signal structure satellite navigation open, and vulnerability to spoofing attacks also becoming increasingly prominent, which will seriously affect credibility navigation, positioning, timing (PNT) services. authentication technology an emerging technical means improving civil anti-spoofing on system side, it important development direction research focus GNSS. China plans carry out design next-generation...
Diversity patterns and community assembly of soil microorganisms are essential for understanding biodiversity ecosystem processes. Investigating the impacts environmental factors on microbial is crucial comprehending functions However, these issues remain insufficiently investigated in related studies despite their fundamental significance. The present study aimed to assess diversity bacterial fungal communities altitude depth variations mountain ecosystems by using 16S ITS rRNA gene...
Peatlands are vital for global carbon storage, but drainage significantly disrupts their natural cycling. Drainage alters peatland soil environments in complex ways, affecting factors such as water table, temperature, organic (SOC), pH, and microbial communities. However, how these interact to influence GHG emissions remains unclear. In this study, we compared properties, community structure, across three zones of a Northeast China undergoing drainage: drained, transition, areas. The average...
ABSTRACT Human‐driven land use changes significantly contribute to habitat loss and fragmentation in temperate forests, prompting the implementation of ecological conservation programs. However, these efforts may be undermined by competing demands economic development. This study assessed forest quality relative contribution decisions (ecological programs, cropland expansion, urbanization) Changbai Mountain region, Northeast China from 1990 2050. Our results revealed a region‐wide decline...
It is a long dream to realize the communication and navigation functionality in satellite system world. This paper introduces how establish system, positioning based on satellites called Chinese Area Positioning System (CAPS). Instead of typical satellites, are configured firstly transfer signals from ground stations, can be used obtain service positioning, velocity time, achieve function positioning. Some key technique issues should first solved; they include accuracy position determination...
Abstract Estimating organisms' responses to environmental variables and taxon associations across broad spatial scales is vital for predicting their climate change. Macroinvertebrates play a major role in wetland processes, but studies simultaneously exploring both community structure trait gradients are still lacking. We compiled global dataset (six continents) from 756 depressional wetlands, including the occurrence of 96 macroinvertebrate families, phylogenetic tree, 19 biological traits....
Satellite atomic clocks are the basis of GPS for control time and frequency navigation signals. In Chinese Area Positioning System (CAPS), a satellite system without onboard is successfully developed. Thus, method synchronization based on in not suitable. virtual used to implement navigation. With clocks, at which signals transmitted from ground can be delayed into that satellites pseudorange measuring fulfilled as GPS. navigation, make difference, remove ephemeris error, improve accuracy...
This work describes the barometric altimetry as virtual constellation applied to Chinese Area Positioning System (CAPS), which uses transponders of communication satellites transfer navigation messages users. Barometric depends on relationship air pressure varying with altitude in Earth’s atmosphere. Once at a location is measured site can be found. method able enhance and improve availability three-dimensional positioning. The difficulty that relation between variable different areas under...
Proper signal structure is very important in the navigation, positioning, and time services of a satellite navigation system. In this paper, carrier wave characteristics, ranging code functions, BOC modulation, data rate, error-correcting methods, channel resource allocation are discussed terms technical characteristics transforming system resources communication satellites. The results show that dual-frequency C band Chinese Area Positioning System (CAPS), compound code, combination coarse...
We report on the Compass global satellite navigation system and its time reference system. China has sent three satellites into geostationary orbit since 2000, Navigation Test System been established. reference, named as BDT, is based atomic time; BDT derived from clock ensemble in ground control centre can be traced to international time, UTC.
Natural wetlands are known to store huge amounts of organic carbon in their soils. Despite the importance this storage, uncertainties remain about molecular characteristics soil matter (SOM), a key factor governing stability (SOC). In study, fingerprints SOM typical freshwater wetland Northeast China were investigated using pyrolysis gas-chromatography/mass-spectrometry technology (Py-GC/MS). Results indicated that SOC, total nitrogen (TN), and sulfur contents cores varied between 16.88%...
Abstract Exotic species invasions have profound effects on native ecosystems, with the ecological of non‐native plants being especially pervasive. We investigated impacts a plant invasion benthic invertebrate assemblages in intertidal wetlands Yellow River Delta, comparing communities associated exotic Spartina alterniflora against those ( Tamarix chinensis , Suaeda salsa and mudflat). Our study surprisingly found that density, diversity, richness invertebrates S. were higher than habitats....
Dissimilatory iron reduction (DIR) coupled with carbon cycling is increasingly being recognized as an influential process in freshwater wetland soils and sediments. The role of DIR organic matter (OM) mineralization, however, still largely unknown lake sediment environments. In this study, we clarified rates pathways OM mineralization two shallow lakes seasonal hydrological connectivity different eutrophic situations. We found that comparison the domination (55%) for Lake Xiaoxingkai,...