A5100417646- Air Quality and Health Impacts
- Power Systems and Renewable Energy
- COVID-19 impact on air quality
- Advanced Photocatalysis Techniques
- VLSI and Analog Circuit Testing
- Photovoltaic System Optimization Techniques
- Real-time simulation and control systems
- Image Enhancement Techniques
- Face and Expression Recognition
- High-Voltage Power Transmission Systems
- Air Quality Monitoring and Forecasting
- Advanced Steganography and Watermarking Techniques
- Digital Media Forensic Detection
- Educational Systems and Policies
- Hand Gesture Recognition Systems
- Cryptographic Implementations and Security
- Integrated Circuits and Semiconductor Failure Analysis
- HVDC Systems and Fault Protection
- Remote Sensing and Land Use
- Advanced Image Fusion Techniques
- Solar Radiation and Photovoltaics
- Advanced Image Processing Techniques
- Face recognition and analysis
- Ideological and Political Education
- Urban Heat Island Mitigation
Hefei University of Technology
2018-2024
Hebei Meteorological Bureau
2024
Harbin Institute of Technology
2024
Xidian University
2023
Guangxi Normal University
2023
Dalian Maritime University
2021
Southeast University
2020
University of Science and Technology of China
2020
Northwestern Polytechnical University
2019
Xiangtan University
2008
In early 2020, the COVID-19 epidemic spread globally. This study investigated air quality of three cities in Hubei Province, Wuhan, Jingmen, and Enshi, central China, from January to March 2017–2020 analyze impact prevention control actions on quality. The results indicated that cities, during February when were taken, average concentrations atmospheric PM2.5, PM10, SO2, CO, NO2 46.1 µg m–3, 50.8 2.56 ppb, 0.60 ppm, 6.70 30.1%, 40.5%, 33.4%, 27.9%, 61.4% lower than levels 2017–2019,...
Both the air quality index (AQI) and indicatory pollutants of Anqing, Hefei, Suzhou near central China from 2017 to 2019, impact COVID-19 epidemic prevention control actions on were investigated. The combined data for three cities 2019 indicated that lowest AQI (averaged 78.1) occurred in summer season, which proportions classes I, II, III, IV, V, VI 25.6%, 49.9%, 21.9%, 2.7%, 0%, respectively. highest (AQI average 112.6) was winter, 7.4%, 39.5%, 33.3%, 12.5%, 7.2%, 0.1%, PM2.5, PM10, NO2...
This study investigated the AQI (air quality index) and atmospheric pollutants including PM2.5, PM10, CO, SO2, NO2 O3 in Chongqing, Luzhou Chengdu from 2017 to 2019. In addition, impacts of COVID-19 event on air three cities 2020 were compared discussed. For combined AQIs for cities, spring, daily ranged between 25 182 averaged 72.1. summer, 24 206 77.5. autumn, 22 170 61.1, winter, 28 375 99.6. The distributions six classes spring 3%, 94%, 0%, 0%; they 11%, 74%, 15%, 0% 29%, 70%, 1%, 52%,...
Grid-connected photovoltaic power generation has become an effective way to utilize solar energy. In order accurately analyze the dynamic characteristics of a grid-connected station, equivalent modeling method based on Canopy-FCM clustering algorithm is proposed. Considering lack theoretical basis for selection traditional index, this paper deduces transfer function inverter control system detailed model and proposes new which takes zero-pole expression closed-loop as prototype. improve...
Performance failure has become a major threat for various memory and analog circuits. It is challenging to estimate the extremely small probability when failed samples are distributed in multiple disjoint regions. In this article, we propose an adaptive importance sampling (AIS) algorithm. AIS several iterations of region adjustments, while existing methods predecide static distribution. We design two frameworks based on resampling population Metropolis-Hastings (MH) iteratively search The...
Automatic head posture recognition is essential in the human-centered AI applications such as counting watching people a bus or lift advertising system. A partially-occluded estimation algorithm based on histogram of gradient orientation (HoG) pyramid setting proposed. We first apply face detection to 2D image, and then divide detected region into two sub-regions, mouth eye areas, predict whether there an occlusion these sub-regions individually. According predicted status, HoG features are...
With the change of observation demands, traditional monostatic synthetic aperture radar(SAR) can no longer meet requirements such as passive reception and cooperative multimode imaging. Spaceborne/Airborne hybrid bistatic SAR(SA-BSAR) emerges times require, has been widely concerned with its flexibility, concealment. However, receiver transmitter do not share same frequency oscillation source, impact time error on imaging cannot be ignored satellite operates for a long time. At time, SA-BSAR...
ABSTRACT The high concentration of ammonia nitrogen (NH4+) and chemical oxygen demand (COD) in biogas slurry pose great challenges to the efficiency traditional wastewater treatment systems. Collophanite tailings are solid waste, characterized by significant concentrations phosphorus (PO43-) magnesium (Mg2+), represent a potential resource for reduction recovery NH4+ via struvite precipitation. This study systematically explored optimal leaching parameters employing sulfuric acid extraction...
The large-scale utilization of clean energy represented by photovoltaic(PV) is an inevitable trend future development. To analyze the impact grid-connected PV on transient characteristics power grid, this paper first establishes electromagnetic simulation model system. Then and electromechanical hybrid system established Matlab/Simulink PSCAD platform. key problems such as equivalence side side, interface processing timing are described. Finally, correctness algorithm verified in a simple...
In order to provide large capacity of hidden secret data and imperceptibility stego-image, in this paper, a novel image steganographic method based on self-organizing map HVS was presented. According contrast texture sensitivity, competitive learning is trained. So NNs trained the key embedded extracted data. The exploits neighboring pixels(upper, left, right, bottom) estimate degree sensitivity pixels with so that less sensitive areas can potentially carry more From experimental results,...
Although the traditional dehazing algorithm can improve clarity of hazy weather images, it may lead to loss many details and distortion color saturation in process processing. In order overcome this defect enhance image, a single image based on non-subsampling contourlet transform was proposed. First, captured fog images are mapped from RGB space HSI space, luminance channel map processed separately. The is decomposed by contourlet. obtained high-frequency components filtered guided filter,...
Batch computing services have the characteristics of providing required by users on demand. Furthermore, failure factors such as resource constraints and scheduling can lead to service violations. The accountability mechanism is essential be established, which integrates analysis, Network generation, Determination, Tracing. There are functional modules that done some research parts mechanism. However, in order integrate them into mechanism, framework for batch services. Therefore, this...
In this paper, we study an ordered problem of objects with multi-attributes based on granulation computing (GrC) for information system (OIS) and develops a novel multi-granulation rough set (MGRS) named the compromise (CMGRS). The CMGRS is generalized model classical MGRS. This new tool has good weak transitivity can be used to address problems in OIS. Based MGRS, construct approach research introduces method discusses its characteristics. results from example investment project 2007...