A5078759105- Marine and coastal ecosystems
- Water Quality Monitoring and Analysis
- Dark Matter and Cosmic Phenomena
- Water Quality Monitoring Technologies
- Particle physics theoretical and experimental studies
- Remote-Sensing Image Classification
- Aquatic Ecosystems and Phytoplankton Dynamics
- Neutrino Physics Research
- Water Quality and Pollution Assessment
- Fish Ecology and Management Studies
- Environmental Changes in China
- Astrophysics and Cosmic Phenomena
- Remote Sensing in Agriculture
- Seaweed-derived Bioactive Compounds
- Methane Hydrates and Related Phenomena
- Atomic and Subatomic Physics Research
- Adipose Tissue and Metabolism
- Adipokines, Inflammation, and Metabolic Diseases
- Mercury impact and mitigation studies
- Polysaccharides and Plant Cell Walls
- Geophysics and Gravity Measurements
- Remote Sensing and LiDAR Applications
- Hydrology and Watershed Management Studies
- Climate change and permafrost
- Particle Detector Development and Performance
National Health and Family Planning Commission
2024-2025
Nanjing Hydraulic Research Institute
2015-2022
State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering
2019-2021
Chinese Academy of Sciences
2019
Nanjing Institute of Geography and Limnology
2019
University of Chinese Academy of Sciences
2019
Nanjing Normal University
2011-2012
Assessing the impacts of environmental change and anthropogenic activities on historical current total suspended matter (TSM) pattern in Dongting Lake, China, is a large challenge. We addressed this challenge by using more than three decades Landsat data. Based situ measurements, we developed an algorithm based near-infrared (NIR) band to estimate TSM Lake. The was applied images derive distribution maps from 1978 2013 wet season, revealing significant inter-annual spatial variability....
Oxidative stress is closely associated with sarcopenia obesity (SO). As the primary active component of Polygonatum sibiricum, sibiricum polysaccharide (PsP) recognized as a potent antioxidant and has become focus research for potential therapeutic strategies against SO. Our previous study demonstrated that ultrasound-assisted deep eutectic solvents (UAE-DESs) significantly improve extraction efficiency PsP; however, effect PsP extracted using UAE-DESs was unexplored. This investigated...
The PandaX-4T liquid xenon detector at the China Jinping Underground Laboratory is used to measure solar $^8$B neutrino flux by detecting neutrinos through coherent scattering with nuclei. Data samples requiring coincidence of scintillation and ionization signals (paired), as well unpaired ionization-only (US2), are selected energy threshold approximately 1.1 keV (0.33 keV) nuclear recoil energy. Combining commissioning run first science PandaX-4T, a total exposure 1.25 1.04 tonne$\cdot$year...
The main active component of Polygonatum sibiricum (P. sibiricum) rhizome is Polysaccharide (PsP) with antioxidant function. At present, only the mature P. used to extract PsP, while young by-product discarded directly as waste, resulting in significant wastage resources. We ultrasound-assisted extraction-deep eutectic solvents (UAE-DESs) method PsP and rhizomes, respectively. extraction rate, structure composition ability between rhizomes were compared, so provide references for...
The Tiaoxi River is the main source of water for Lake Taihu and can result in plumes lake after heavy precipitation events. These have played a crucial role quality changes within lake. High temporal resolution GOCI (Geostationary Ocean Color Imager) data were used to study spatial distribution total suspended matter concentration events Basin via an empirical model. analyzed two 2011 2013 using 16 images, which indicated that had great influence on distributions algal blooms. It was...
The chlorophyll-a (Chl-a) concentration of eutrophic lakes fluctuates significantly due to the disturbance wind and anthropogenic activities on water body. Consequently, estimation Chl-a has become an immense challenge. Due urgent demand rapid development in high-resolution earth observation systems, it crucial assess hyperspectral satellite imagery capabilities inland monitoring. Orbita (OHS) is latest sensor with both high spectral spatial resolution (2.5 nm 10 m, respectively), which...
Data-driven models are widely used in the field of water level prediction due to their generalizability and predictive abilities. In long-series prediction, however, data-driven degrade rapidly uncertainty constraints model data parameters. To address problem inaccurate continuous this study introduced a assimilation technique, unscented Kalman filter (UKF), embedded support vector regression (SVR) into framework applied it Dongting Lake, second largest freshwater lake China. The results...
In this letter, we report the dark matter search results from commissioning run and first science of PandaX-4T experiment. A blind analysis is carried out on entire data set. The processing improved compared to previous work, unifying low-level signal reconstruction in a wide energy range up 120 keV. With total exposure 1.54 tonne$\cdot$year, no significant excess nuclear recoil events found. lowest 90% confidence level exclusion spin-independent cross section $1.6 \times 10^{-47}...
Axion-like particles (ALPs) and dark photons (DPs) are viable matter particle candidates. We have searched for possible ALP/DP signals in the PandaX-4T liquid xenon detector using 94.8 days of data. A binned likelihood fit is constructed to search mono-energetic peaks induced by absorption processes between ALPs/DPs atomic electrons xenon. detailed temporal model decays associated with isotopes introduced constrain number background events. No signal excess over expectations observed, we...
Detailed studies of two-neutrino double electron capture (2$\nu$DEC) is a crucial step towards searching for the neutrino-less mode to explore Majorana nature neutrinos. We have measured precisely half-life 2$\nu$DEC process in $^{124}$Xe, utilizing total exposure 1.73 tonne$\cdot$year from commissioning run and first science PandaX-4T experiment. A time-dependent background model $\mathcal{O}$(10 keV) energy constructed time data. With an unbinned maximum likelihood fit, we determine be...
We report the search for neutrinoless double-beta decay of $^{136}$Xe from PandaX-4T experiment with a 3.7-tonne natural xenon target. The data reconstruction and background modeling are optimized in MeV energy region. A blind analysis is performed commissioning run first science run. No significant excess signal over observed. lower limit on half-life established to be $2.1 \times 10^{24}$~yr at 90\% confidence level, exposure 44.6~kg$\cdot$year. Our result represents most stringent...
We present a novel constraint on light dark matter utilizing $1.54$ tonne$\cdot$year of data acquired from the PandaX-4T dual-phase xenon time projection chamber. This is derived through detecting electronic recoil signals resulting interaction with solar-enhanced flux. Low-mass particles, lighter than few MeV/$c^2$, can scatter thermal electrons in Sun. Consequently, higher kinetic energy, boosted component becomes detectable via contact scattering electrons, keV energy deposition that...
根据2009年8月22-24日实测的三峡水库水体的光谱数据以及水质参数, 对三峡水库漫衰减系数的光学特性及影响因子进行分析研究, 构建了490nm处漫衰减系数的K<sub>d</sub>(490)反演模型, 并利用环境一号卫星CCD数据对2009年7月21日的三峡水库K<sub>d</sub>(490)进行反演.结果表明:由于水体中非色素颗粒物的含量较高, 使得研究区大部分点位的K<sub>d</sub>值在440nm和675nm处的衰减峰值不明显, 对K<sub>d</sub>占主导地位的影响因子是颗粒物的吸收作用以及水体的总散射作用, 在所选的四个特征波段(440、550、613和675nm)处, 其贡献率的均值分别为45.48%和38.21%;在400-700nm波段范围, K<sub>d</sub>与非色素颗粒物浓度具有很好的幂函数关系.利用地面实测遥感反射率模拟环境卫星第三波段构建K<sub>d</sub>(490)反演模型, 其平均相对误差为17.89%,...
根据2009年6月巢湖32个样点的实测数据, 分析巢湖水体漫衰减系数光谱特征、主导因子、空间分布规律以及400-700nm各波段K<sub>d</sub>与K<sub>d</sub>(490)之间的关系, 并在此基础上, 建立了K<sub>d</sub>的遥感反演模型.结果表明:巢湖水体K<sub>d</sub>具有一致的光谱特征, 400-600nm之间K<sub>d</sub>随波长的增加呈指数衰减趋势, 在600-700nm之间的变化较小, 部分点位在波长675nm附近出现峰值, 700-900nm之间K<sub>d</sub>呈现出类似于纯水的吸收光谱特征;巢湖中无机颗粒物是水体漫衰减的主导因子, 有机悬浮物影响次之, CDOM的影响最小;巢湖东半湖区K<sub>d</sub>(490)普遍高于西半湖区, 巢湖中部K<sub>d</sub>(490)等值线分布较密集,...