Lujun Wang
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View article: Strength Deterioration and Sensitivity Analysis of Coal Samples Under Different Immersion Times for Underground Water Reservoirs
Strength Deterioration and Sensitivity Analysis of Coal Samples Under Different Immersion Times for Underground Water Reservoirs Open
In the coal pillar dam of underground water reservoirs, groundwater exerts a certain degree of dissolution and erosion on the coal body, inducing the development of internal cracks and the deterioration of its mechanical properties. To thi…
View article: Reactive Power Equalization Strategy for Islanded Microgrids Based on Improved Adaptive Droop Factor
Reactive Power Equalization Strategy for Islanded Microgrids Based on Improved Adaptive Droop Factor Open
Due to the mismatch of line impedance, the traditional droop control of parallel inverters in microgrids has limitations. It is difficult to achieve uniform distribution of reactive power and reduce voltage deviation. This paper proposes a…
View article: A Novel SOH Estimation Method for Lithium-Ion Batteries Based on the PSO–GWO–LSSVM Prediction Model with Multi-Dimensional Health Features Extraction
A Novel SOH Estimation Method for Lithium-Ion Batteries Based on the PSO–GWO–LSSVM Prediction Model with Multi-Dimensional Health Features Extraction Open
Accurate State of Health (SOH) estimation of lithium-ion batteries (LIBs) is critical for ensuring the safety of electric vehicles and improving the reliability of battery management systems (BMS). However, the use of individual health fea…
View article: Stability Analysis of High Slopes in Open‐Pit Mines Under Groundwater Seepage in a Tropical Rainforest Climate
Stability Analysis of High Slopes in Open‐Pit Mines Under Groundwater Seepage in a Tropical Rainforest Climate Open
Groundwater significantly influences slope stability by increasing pore water pressure and reducing the mechanical strength of rock and soil masses. To ensure the safety of open‐pit mining operations, it is crucial to understand the mechan…
View article: A Critical State Constitutive Model for Methane Hydrate‐Bearing Sediments Considering Hydrate Pore‐Filling and Cementing Effects
A Critical State Constitutive Model for Methane Hydrate‐Bearing Sediments Considering Hydrate Pore‐Filling and Cementing Effects Open
To safely and effectively explore the natural methane hydrate, it is crucial to examine the mechanical behavior of methane hydrate‐bearing sediments (MHBSs). Natural methane hydrate unevenly distributes in pores or bonds with soil particle…
View article: Detection of Impedance Inhomogeneity in Lithium-Ion Battery Packs Based on Local Outlier Factor
Detection of Impedance Inhomogeneity in Lithium-Ion Battery Packs Based on Local Outlier Factor Open
The inhomogeneity between cells is the main cause of failure and thermal runaway in Lithium-ion battery packs. Electrochemical Impedance Spectroscopy (EIS) is a non-destructive testing technique that can map the complex reaction processes …
View article: Influence of spatial structure migration of overlying strata on water storage of underground reservoir in coal mine
Influence of spatial structure migration of overlying strata on water storage of underground reservoir in coal mine Open
Underground reservoir technology for coal mines can realize the coordinated development of coal exploitation and water protection in water-shortage-prone areas. The seepage effect of the floor seriously affects the safety of underground re…
View article: Seismic Safety Analysis of Interlaminar Rock Mass in the Distributed Underground Reservoir of a Coal Mine
Seismic Safety Analysis of Interlaminar Rock Mass in the Distributed Underground Reservoir of a Coal Mine Open
This study focuses on the seismic safety of distributed underground reservoirs in coal mines, especially in scenarios involving the establishment of multiple reservoirs within the same mining area, spanning different coal seams. Dynamic si…
View article: Strength Damage and Acoustic Emission Characteristics of Water-Bearing Coal Pillar Dam Samples from Shangwan Mine, China
Strength Damage and Acoustic Emission Characteristics of Water-Bearing Coal Pillar Dam Samples from Shangwan Mine, China Open
Long-term erosion and repeated scouring of water significantly affect the technical properties of coals, which are the essential elements that must be considered in evaluating an underground reservoir coal column dam’s standing sustainabil…
View article: Fault Diagnosis Method for Lithium-Ion Battery Packs in Real-World Electric Vehicles Based on K-Means and the Fréchet Algorithm
Fault Diagnosis Method for Lithium-Ion Battery Packs in Real-World Electric Vehicles Based on K-Means and the Fréchet Algorithm Open
Battery failure has traditionally been a major concern for electric vehicle (EV) safety, and early fault diagnosis will reduce many EV safety accidents. However, the short-circuit signal is generally very weak, so it is still a challenge t…
View article: Energy transfer from tunneling electrons to excitons
Energy transfer from tunneling electrons to excitons Open
Excitons in optoelectronic devices have been generated through optical excitation, external carrier injection, or employing pre-existing charges. Here, we reveal a new way to electrically generate excitons in transition metal dichalcogenid…
View article: Dewatering-Induced Stratified Settlement around Deep Excavation: Physical Model Study
Dewatering-Induced Stratified Settlement around Deep Excavation: Physical Model Study Open
The multi-aquifer and multi-aquitard system (MAMA) is a typical geological structure in deltas. Thus, the risks and challenges to settlement control and environmental protection are increased when demand for underground space extends to de…
View article: DC Microgrid Protection System Based on Positive Channel Metal Oxide Semiconductor
DC Microgrid Protection System Based on Positive Channel Metal Oxide Semiconductor Open
DC microgrid has received extensive attention and research because of its natural advantages of improving the consumption efficiency of distributed power sources, and in line with the development trend of clean environment and intelligent …
View article: Modal analysis of subway tunnel in soft soil during operation
Modal analysis of subway tunnel in soft soil during operation Open
Modal parameters are of great significance in civil engineering because they can characterize the properties of structures and be used for vibration control and structural health monitoring. Subway tunnels are long linear truss structures …
View article: A simplified method for evaluating temperature effect on the behavior of layered soil with a time-varying cylindrical heat source
A simplified method for evaluating temperature effect on the behavior of layered soil with a time-varying cylindrical heat source Open
The engineering application of cylindrical heat source usually influences the characteristics of the surrounding soil and induces significant coupling responses of temperature, seepage and stress fields. This paper presents a numerical inv…
View article: A model on assessing effects of gas diffusion in multifield coupled process for unsaturated soils
A model on assessing effects of gas diffusion in multifield coupled process for unsaturated soils Open
Gas diffusion is an important process in thermo-hydro-mechanical coupled problems of unsaturated soils, e . g ., nuclear waste repositories or heated pipeline engineering, which usually strongly affects process of liquid water evaporation …
View article: Prediction of water source and water volume of underground reservoir in coal mine under multiple aquifers
Prediction of water source and water volume of underground reservoir in coal mine under multiple aquifers Open
The role of coal mine underground reservoirs (CMUR) in ‘guide storage and use’ greatly solves the problem of mine water waste. Replenishment and prediction of reservoir water sources provide an important support for the successful developm…
View article: Molecular simulation in surface hydration of clay minerals: a review of theory and applications
Molecular simulation in surface hydration of clay minerals: a review of theory and applications Open
Clay minerals, which are prevalent gangue minerals, are found in tailings and beneficiation effluent after the extraction of valuable minerals. The surface of clay mineral particles is easy to hydrate, which makes it the main factor restri…
View article: Short-Term Effects of Spent Mushroom Substrate Mulching Thickness on the Soil Environment, Weed Suppression, Leaf Nutrients, and Nut Characteristics in a Hazelnut Orchard
Short-Term Effects of Spent Mushroom Substrate Mulching Thickness on the Soil Environment, Weed Suppression, Leaf Nutrients, and Nut Characteristics in a Hazelnut Orchard Open
Worldwide, a huge amount of solid fermented waste is produced every year during mushroom production. The rational utilization of spent mushroom substrate (SMS) is conducive to environmental protection and the sustainable development of agr…
View article: Bidirectional Short-Circuit Current Blocker for DC Microgrid Based on Solid-State Circuit Breaker
Bidirectional Short-Circuit Current Blocker for DC Microgrid Based on Solid-State Circuit Breaker Open
In order to solve the imminent problem in that the traditional protection strategy cannot meet time requirements, together with the fact that the rotational inertia of a DC microgrid is small and short-circuit fault develops rapidly, a bid…
View article: Power Distribution Strategy of Microgrid Hybrid Energy Storage System Based on Improved Hierarchical Control
Power Distribution Strategy of Microgrid Hybrid Energy Storage System Based on Improved Hierarchical Control Open
Traditional hierarchical control of the microgrid does not consider the energy storage status of a distributed hybrid energy storage system. This leads to the inconsistency of the remaining capacity of the energy storage system in the proc…
View article: Performance analysis of direct-sequence spread-spectrum underwater acoustic communications based on at-sea data
Performance analysis of direct-sequence spread-spectrum underwater acoustic communications based on at-sea data Open
Direct sequence spread spectrum (DSSS) signal uses phase coherent signals where the information symbols are multiplied with a code sequence, commonly known as chips. The signals are processed at the receiver using the code sequence as a ma…