A5071899440- High voltage insulation and dielectric phenomena
- Power Transformer Diagnostics and Insulation
- Thermal Analysis in Power Transmission
- Lightning and Electromagnetic Phenomena
- Power Systems Fault Detection
- Machine Fault Diagnosis Techniques
- Power Line Inspection Robots
- Topic Modeling
- Aerosol Filtration and Electrostatic Precipitation
- Magnetic Properties and Applications
- Power System Reliability and Maintenance
- Natural Language Processing Techniques
- Energy Load and Power Forecasting
- Diabetic Foot Ulcer Assessment and Management
- Breast Lesions and Carcinomas
- Applied Advanced Technologies
- High-Temperature Coating Behaviors
- Advancements in Materials Engineering
- High-Voltage Power Transmission Systems
- Chinese history and philosophy
- Mechanical stress and fatigue analysis
- Smart Grid and Power Systems
- Pressure Ulcer Prevention and Management
- Geotechnical Engineering and Underground Structures
- Evaluation Methods in Various Fields
Wuhan University
2018-2024
State Grid Corporation of China (China)
2023
The People's Hospital of Guangxi Zhuang Autonomous Region
2022-2023
Guilin University of Electronic Technology
2021-2022
This paper proposed a prediction method to predict 10-kV oil-immersed transformer hot spot temperature (HST). A set of feature points on the iron shell is based fluid-thermal field calculation. These points, as well load rate, are taken input parameters machine learning model established by support vector regression (SVR), thus describe their relationships with HST. trained nine samples selected L9(34) orthogonal array and applied HST 20 test samples. The training all obtained simulation,...
Transformer winding hot‐spot temperature (HST) is one of the important factors affecting transformer oil–paper insulation deterioration. This study presents a three‐dimensional coupled electromagnetic‐fluid‐thermal analysis method for HST calculation in 10 kV oil‐immersed distribution transformer, influence internal metal structure parts on considered simulation. Combining electromagnetic‐field with no‐load test and load provides more accurate to determine losses transformer. Taking those...
This study aimed to explore the risk factors for foot ulcer recurrence in patients with comorbid diabetic osteomyelitis (DFO) and nephropathy (DN). is a prospective cohort study. Between May 2018 2021, we selected 120 inpatients severe infection (PEDIS Grade 3 or above) DN inclusion our All cases were followed up 36 months. The outcomes whether recurred time recurrence. of analysed by comparing data three groups. According ulcer, participants divided into groups: Group A (no recurrence, n =...
Abstract Transformer overheating faults have an important impact on the transformer safe and stable operation. Taking 10 kV oil‐immersed as research object, using indirect coupling analysis method of electromagnetic thermal fluid multi‐physical field, heating characteristics under faults, such winding inter‐turn short circuit core multi‐point grounding, are analysed, abnormal state identification is proposed based inversion top oil temperature rise. By inverting normal rise different load...
This paper proposes an inversion method to estimate a 10 kV oil-immersed transformer transient hot spot temperature (HST). A set of feature quantities which can reflect the load change are proposed, those as well real time rate and points on iron shell taken input parameters machine learning model established by support vector regression (SVR), thus describe their relationships with HST. K-fold cross-validation training grid search (GS) optimization used find optimal SVR model, HST results...
Age is a significant determinant of susceptibility to breast cancer. Currently, the available evidence regarding non-linear correlation between age diagnosis and prognosis cancer patients contradictory. Insufficient data currently exist influence at on The objective our investigation was examine relationship overall survival (OS), cancer-specific (BCSS), disease-free (DFS).This retrospective cohort study included 1054 diagnosed with March 7, 2013 December 31, 2019. hazard ratios (HRs) 95%...
Abstract The trip mechanism is a weakness in circuit breakers. Traditional fault identification based on the coil current difficult to report early mechanical defects such as coil‐plunger jam. Here, vibration signal during process was extracted. Based and signal, characteristics of are analyzed. phase space reconstruction (PSR) method used extract features from signal. Combined with waveform, feature set representing health condition proposed. simulation tests carried out variation under...
Abstract In this article, the dynamic thermal rating assessment method of oil‐immersed power transformer with multiple operating conditions is proposed, considering constraints hot spot temperature (HST), top oil temperature, losses life and maximum allowable current on‐load tap changer (OLTC) or bushing, which can determine load curves under different give most sensitive to limit capacity. To improve accuracy HST estimation, estimation model also improved parameters are optimised using...
Abstract Background A connection between lymphovascular invasion and axillary lymph node metastases in breast cancer has been observed, but the findings are inconsistent primarily based on research Western populations. We investigated association non-sentinel (non-SLN) metastasis patients with sentinel (SLN) western China. Methods This study comprised 280 who tested positive for SLN through biopsy subsequently underwent dissection (ALND) at The People’s Hospital of Guangxi Zhuang Autonomous...
Ocean underwater vertical sensor structure is a kind of modern marine observation platform. But most the current ocean sensors work independently, and it lacks suitable method to assemble them in control system. Having good expansibility convenient structure, buoy platform with contactless data transmission technology possible organise long-term, real-time autonomous working network. The model two-stage electromagnetic coupler investigated. A prototype communication system using differential...
The aging of the transformer oil-paper insulation distributes spatially, which results in changes paper resistivity different regions. This establishes an iterative inversion algorithm using finite element method to calculate oil-immersed regions a transformer. sets dielectric loss factor tan δ at low frequency, parameters oil as inputs and output. obtained from can be used reference access state insulation. aims achieving nondestructive detection partial
To address the difficulty in characterizing early mechanical faults trip mechanism of circuit breakers, a data mining method based on variational mode decomposition (VMD) and phase space reconstruction (PSR) was proposed. First, vibration signal stage separated from whole according to current features. Then, it decomposed using VMD algorithm obtain intrinsic functions (IMFs) these sub signals were mapped high-dimensional PSR algorithm. features attractor trail shape recurrence plot matrixes...
Bird activities including the defecation, nesting, and flight are easy to cause electrical faults of overhead transmission lines, study on prevention measures bird damage lines is great significance ensure stable reliable operation power system. With establishment finite element simulation model, effects box guard with different material electric field potential distribution line insulators studied. Besides, combined theory air discharge results simulation, influence rainwater gap around...
A large amount of CaSO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> is contained in the transmission line insulator contamination under natural conditions, and has an influence on pollution flashover characteristics leakage current insulator. The tests were carried out a fog chamber using XWP2-160 double-shed suspended porcelain insulators laws content polluted string's withstand voltage studied. results indicate that with increase...
Bird activities are easy to cause electrical faults of overhead transmission lines. As one the main anti bird device, baffle guard has been widely used in China. The performance 220 kV line analyzed this paper, with establishment finite element simulation model, effects different materials on insulator electric field and potential distributions studied. Besides, considering that some birds may build nests practical applications, part material bird's nest fall off, which lead discharge...
The accurate calculation of the electric field under various working conditions is great significance to safe operation converter station. In order improve accuracy simulation, in this paper, a static equivalence method was studied for fittings' surface simulation station, adopting equivalent transient different voltages presented: can be electrostatic switching overvoltage; typical direct current (DC) voltage waveform analysis constant field. Two-dimensional (2D) axisymmetric finite element...
Obtaining high-quality embeddings of out-of-vocabularies (OOVs) and low-frequency words is a challenge in natural language processing (NLP). To efficiently estimate the OOVs words, we propose new method that uses dictionary to words. More specifically, explanatory note an entry dictionaries accurately describes semantics corresponding word. Naturally, adopt sentence representation model extract regard as embedding We design encode sentences from notes entries more efficiently. Based on...
Strain online monitoring has become an important means of transmission tower safety assessment, and the prediction strain time series great significance to early warning failure. This paper proposed system based on fiber Bragg grating monitoring, installation method sensor been explored. The test results show that using designed “L” shaped fixture good measurement accuracy. installed actual 500kV tower, measured data weak components obtained. A medium-short term model ARIMA a ultra-short...