A5101811146- Climate change and permafrost
- Cryospheric studies and observations
- Landslides and related hazards
- Soil Moisture and Remote Sensing
- Remote Sensing and Land Use
- High-Voltage Power Transmission Systems
- Smart Grid and Power Systems
- Metallurgy and Material Forming
- Fire effects on ecosystems
- Urban Heat Island Mitigation
- Advanced Decision-Making Techniques
- HVDC Systems and Fault Protection
- Atmospheric and Environmental Gas Dynamics
- Remote Sensing in Agriculture
- Aluminum Alloys Composites Properties
- Seismology and Earthquake Studies
- Geophysical Methods and Applications
- Environmental Changes in China
- Digital Media and Visual Art
- Soil and Land Suitability Analysis
- Geoscience and Mining Technology
- Optical measurement and interference techniques
- Thermal Analysis in Power Transmission
- Smart Materials for Construction
- Photovoltaic Systems and Sustainability
Northwest Institute of Eco-Environment and Resources
2020-2024
Chinese Academy of Sciences
2010-2024
Ningbo Institute of Industrial Technology
2024
University of Chinese Academy of Sciences
2020-2024
Suzhou Research Institute
2018
Tsinghua University
2018
China Southern Power Grid (China)
2013-2015
Hunan First Normal University
2013
Electric Power Research Institute
2013
Shanghai Electric (China)
2013
Abstract Unfrozen water content significantly affects the thermal‐hydro‐mechanical characteristics of frozen soil. Currently, theoretical explanations for presence unfrozen include capillary action, surface effects, adsorption forces, and electrical double layer. However, relationships between these actions are not well explained, except forces. In addition, although frost heave experiments indicate that double‐layer solution on a clay particle contains main portion water, theory which...
Vegetation is closely related to groundwater depth in the arid inland areas. In this study we investigate relationship between vegetation and of table June 2000 Ejina area, northwestern China, by combining remote sensing with in-situ observations. Our results demonstrate that suitable for region ranges from 2 5 m, depending on species composition. Hardly any occurs when below 5.5 m because rooting present limited therefore cannot maintain adequate water supplies their canopies.
To advance our understanding of land–atmosphere exchanges water, energy and carbon dioxide (CO2) in space time over heterogeneous land surfaces, two intensive field campaigns were carried out at the Barrax agricultural test site Spain during 12–21 July 2004 (SPARC 2004) 8–14 2005 (SEN2FLEX 2005) involving multiple field, satellite airborne instruments for characterizing state atmosphere, vegetation soil from visible to microwave range spectrum. Part experimental area is a core 25 km2, within...
Complex dielectric constant (CDC) of bound water determines the accuracy complex wet soil. According to electrical double-layer structure and properties, on clay particle surface is divided into strongly weakly water. Based this classification, models for constants soil are established taking consideration factors such as temperature, moisture, texture, microwave frequency. The results show that fundamental reason why between ice free adsorption force which forms particles. Low-concentration...
Soil salt content and its relationships with crops water table depth were investigated in this study by using remote sensing techniques field measurements the Yinchuan plain of China. Moderate Resolution Imaging Spectroradiometer-Normalized Difference Vegetation Index (MODIS NDVI) was used as an indicator crop development, samples analyzed for soil content, observation wells provided data. Comparison development defined from NDVI to values indicated that may develop well when surface is...
Abstract Shallow soil refers to the layer within 50 cm depth. temperature (ST) directly or indirectly affects many processes in soil, such as seed germination, plant growth, and water evaporation. Therefore, study of shallow ST is great significance understanding surface energy, cycle, ecology climate change. This work collected observational data from 141 meteorological stations on Qinghai-Tibet Plateau 1981 2020 ERA5 reanalysis data, used “Moving Surface Spline Interpolation Algorithm...
In this paper, a method for wind speed forecasting based on Empirical Mode Decomposition and Support Vector machine is proposed. Compared with the approach only, in paper use EMD to decompose data of power into several independent intrinsic mode functions (IMF),then model each component SVM get final value overall prediction. Experiments show efficiency higher accuracy.
Abstract. Taiyuan basin is enclosed by hills and mountains, located in the middle of Shanxi province, standing between longitudes 111°40'–113°00'E latitude 37°00'–38&deg00'N. With various types wide distribution, mineral resources are very abundant this area. However, there a great shortage water resources. Due to continual fall groundwater level caused excessive extraction ground water, some severe environmental problems induced area, such as subsidence, etc. The goal paper estimate...
A method to compute the numerical derivative of eigenvalues parameterized crystal field Hamiltonian matrix is given, based on derivatives general iteration methods such as Levenberg–Marquardt, Newton method, and so on, can be used solve parameters by fitting experimental energy levels. With eigenvalue derivative, a detailed algorithm levels has also been described. This Yb3+ in Sc2O3 crystal, which prepared co-precipitation whose structure was refined Rietveld method. By simple overlap model...
Nd3+ :GSAG, a laser crystal of 942 nm with good performance, was grown by Czochralski method successfully, and its transmission spectra at room temperature were studied. Sixty-eight field splitting levels the maximum up to 29967 cm-1 identified, which Hamiltonian parameters free-ion fitted, root-mean-square deviation energy level fitting is 16.7 cm-1, indicated that experimental calculated are well consistent. The obtained can be used calculate wavefunctions in GSAG, predict splitting, study...
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The glacial phase can be formed from supercooled liquid (SCL) in certain systems, which is called liquid–liquid transition (LLT). Revealing the nature of especially a single-component system crucial for understanding LLT process. Here, by using flash differential scanning calorimetry and cold-field transmission electron microscopy, structure d-mannitol kinetics between SCL were studied. We found that fluctuating spinodal-like structure. And displays first-order melting characteristic when it...
Abstract Shallow soil refers to the layer within 50 cm underground. temperature (ST) directly or indirectly affects many processes in soil, such as seed germination, plant growth, water evaporation. ST is also affected by solar radiation, atmospheric circulation, air and precipitation changes. Therefore, study of shallow great significance understanding surface energy, cycle, ecology climate change. This work collected observational data from 141 meteorological stations on Qinghai-Tibet...
This paper presents the selection methods of typical substations based on grey correlation analysis method, and proposes classification principles load characteristics. The actual example shows that using this method in process statistical synthesis modelling, selected could be more representative, popularization application modelling results are accurate effective.
The cumalant-based RLS algorithm with variable forgetting factor is introduced in this paper as effective approach for tracking the voltage flicker envelope. improved uses fourth-order cumulant-based mean-squared-error (MSE) criterion place of correlation-based MSE criterion, order to suppress Gaussian noise. For nonstationary waveform, (VFF) can be applied adjust performance and convergence algorithm. Two cases constant amplitude frequency varying are used verify
Demand Side Energy Management System (DSEMS) manages energy demand by controlling end-use appliances in a refined, energy-saving, cost-efficient and user-friendly way. The DSEMS runs on an Android tablet computer, which serves as gateway to communicate with two types of controllers via ZigBee network. Smart sockets connected the network will monitor control plug-in loads IR remote controller (IRRC) for air-conditioner temperature setting. proposed system has been installed apartment over 24...
Based on the introduction of station power using system, this paper used fault tree analysis method to model reliability which had been always ignored in traditional HVDC system evaluation but actually an important impact result evaluation. Whats more, it assessed whole (included system) by means frequency and duration method. Finally, example was given prove correctness validity proposed theory.
The effective strain size and distribution of Al-5Ti-1B alloy deformed by equal channel angular pressing (ECAP) were investigated through the finite element simulation die with outer corner ψ =0°, 20°, 30° friction coefficient f =0, 0.2, 0.3. results show that strains decrease increase from 0° to a constant ; more uniform deformation obtained under conditions large than small friction. was produced once path ECAP at room temperature angle φ =90° =20°. optical microscope compressing test...
According to the structure and characteristics of HVDC system, this paper used FTA (fault tree analysis) method divide fault results DC system into five transmission capacities: 0%, 25%, 50%, 75% 100%, calculated by incorporating AC Monte Carlo simulation evaluate reliability AC/DC hybrid system. Whats more, established model, algorithm index for risk assessment power developed corresponding software. Finally, an example was given prove correctness validity proposed