A5018831415- Coal Properties and Utilization
- Geoscience and Mining Technology
- Geomechanics and Mining Engineering
- Coal and Its By-products
- Safety and Risk Management
- Combustion and Detonation Processes
- Hydrocarbon exploration and reservoir analysis
- Thermochemical Biomass Conversion Processes
- Fire dynamics and safety research
- Fire Detection and Safety Systems
- Environmental and Industrial Safety
- Heme Oxygenase-1 and Carbon Monoxide
- Flame retardant materials and properties
- Risk and Safety Analysis
- Urban Transport and Accessibility
- Advanced Decision-Making Techniques
- Occupational Health and Safety Research
- Educational Technology and Assessment
- Particle Dynamics in Fluid Flows
- Evacuation and Crowd Dynamics
- Mesoporous Materials and Catalysis
- Digital Transformation in Industry
- Flood Risk Assessment and Management
- Granular flow and fluidized beds
- High-Voltage Power Transmission Systems
University of Science and Technology Beijing
2015-2024
East China Normal University
2021-2023
Huazhong University of Science and Technology
2023
Beihang University
2022
Peking University
2022
Hunan University of Science and Technology
2018
State Administration of Work Safety
2016
Tongji University
2012
Macro Fiber Composite (MFC) is extensively utilized in aviation, aerospace, civilian, and military domains owing to its high piezoelectricity, flexibility, minimal loss. Nevertheless, contemporary research on MFC sensors has predominantly focused material applications, with a conspicuous lack of systematic investigation into the simulation modeling sensor devices. In this study, three models—namely, Representative Volume Element (RVE) model, Direct Hybrid model—have been introduced analyze...
The current reaction kinetics of coal–oxygen compound in water-soaked coal has not been accurately explained. Therefore, thermal behavior and microscopic characteristics during spontaneous combustion samples were analyzed. Five kinds selected with moisture contents 5%, 10%, 15%, 20% the raw coal. Fourier transform infrared (FTIR), thermogravimetric (TG), diffuse reflectance spectroscopy (DRIFTS) adopted. results showed that hydroxyl (–OH) group is greatly affected by content samples. area...
Simultaneous thermal analysis and Fourier transform infrared spectroscopy in situ diffuse reflection technology were used to quantitatively study the quality functional groups of lignite during oxidation process according temperature. The Kubelka-Munk equation Starink method calculate kinetics for first time. results show that heating varies stages, including a water evaporation desorption stage, an oxygen absorption weight gain stage decomposition stage. main coal include -OH, C = O,...
This research work is based on a digital twin model, emphasizing the integration of models within comprehensive five-dimensional framework. It introduces breakthrough evaluation standard for models, addressing challenges related to construction, performance evaluation, adaptability, and value. The study specifically focuses use Convolutional Neural Networks (CNN) gesture recognition in Virtual Reality (VR) systems, importance reliability analysis aviation maintenance scenarios. presents VR...
In order to reveal the reaction mechanism responsible for spontaneous combustion of water-immersed coal, this study researched changes in physical and chemical structures coal samples before after water immersion. The results specific surface pore size analyzer test showed that compared with original sample, microporous (<10 nm) ratio decreased, but proportion macropores (>50 increased obviously sample. Also, as immersion time increased, micropores decreased from 78.5% 74.2%, while 8.5%...
As coal and gas outburst is one of the most serious mine disasters, it very important to at least control if not prevent from occurring. Injecting cement slurry or grouting into seam can strengthen seam, increase its rigidity coefficient (f), reduce volumetric expansion due energy release. This paper reports results laboratory experiments on cement-based high water content having different water-cement ratios (W/C) be used for injection. The show that as W/C increases, mobility setting time...
The catalytic partial oxidation of methane (CPOM) to methanol has been regarded as a promising approach for utilization, despite that the conversion remains formidable challenge in perspective catalysts. A novel catalyst system multi-wall carbon nanotubes (MWCNTs) supported Fe2O3 with existing I2, consisting non-noble metal and working weak acid at an ambient temperature, was investigated CPOM. MWCNTs catalyst, which prepared by impregnation method characterized via HRTEM, XRD, XPS, FT-IR,...
Both the macroscopic reaction and microscopic characterization of water-immersed coal have been studied. The methods thermogravimetric analysis via Fourier transform infrared spectroscopy (TG-FTIR) diffuse reflectance (DRIFTS) are used. apparent activation energy was significantly lower than that raw coal. For same sample, production CO in is higher shows after water immersion, content hydroxyl aromatic hydrocarbons increases temperature at which fat-based oxygen-containing functional groups...
This study investigates changes in the concentration and types of free radicals process coal heating, first rising then falling. Hailar lignite, Panjiang bituminous coal, Yangquan anthracite were selected as test samples. The results show that lignite's radical during heating is greater than or anthracite. It clearly shows lignite more prone to spontaneous combustion. In cooling portion experiment, was much at same temperature process. These obtained from this research can provide a...
Coal spontaneous combustion can cause serious coal mine fire and gas explosion. In order to overcome the problem that effect of existing materials inhibit is reduced at high temperature some environmental protection problems materials, this study developed an effective, green antioxidant foamed gel (AFG). Modified sodium polyacrylate, konjac glucomannan, dodecyl sulfate, alpha-olefin sulfonate, modified silicone polyether microemulsion, montmorillonite, tert-butyl hydroquinone were selected...
Considering disadvantages such as the low thermal stability and environmental pollution of existing gel inhibitors, a green stable intumescent nanoinhibitor (INI) was prepared tested. First, polyacrylamide (PAM), nano-silica, flame retardant (IFR) were selected raw materials. The INI by nanoparticle modification cross-linking polymerization. Then, structure physical properties tested Fourier transform infrared spectroscopy, scanning electron microscopy, rheological experiments. Meanwhile,...
In order to study the change laws of free radicals and functional groups during low-temperature coal oxidation, three samples with different metamorphic degrees were selected for ESR FTIR analysis. The results showed that concentration increased as temperature increased; meanwhile, types changed constantly, radical variation range decreased increase in metamorphism. side chains aliphatic hydrocarbons a low degree by varying amounts initial heating stage. -OH content bituminous lignite first...
In order to improve efficiency when preventing and controlling spontaneous combustion of coal, a type compound inhibitor with tea polyphenol vitamin E as the chemical inhibitor, grafted on copolymer hydrogel, was prepared. The oxidation resistance coal analyzed by thermogravimetric test, Fourier infrared spectroscopy, quantum chemistry theory. experiment results showed that: optimum ratio polyphenols 1:0.05; inhibited capturing decomposition products hydroperoxides finally forming stable...
The teaching buildings in colleges and universities are crowded prone to accidents. emergency evacuation capability of these is evaluated by applying the methods fault tree, entropy weight-logarithmic fuzzy multiobjective programming (E-LFMP) comprehensive evaluation. An index system was constructed using basic event structure importance accident influencing factors were more systematic. In order improve objectivity rationality evaluation process results, this study combines weight method...