3+ hour, 34+ min ago   (591+ words) During the frequent charging, discharging, and storage processes of underground compressed air energy storage systems, the damage and degradation of sealing plugs directly affect the long-term stability of gas storage caverns. Using a self-developed cyclic charging–storage–discharging–restorage gas…...

1+ day, 3+ hour ago   (428+ words) The growing penetration of variable renewable energy (VRE) is increasing the frequency of very low and negative prices, although these events also depend on demand, transmission capacity, price-regime persistence and flexibility resources. This study examines which pre-auction and diagnostic variables…...

1+ day, 4+ hour ago   (432+ words) Ensuring reliable and sustainable energy supply in healthcare facilities is essential due to the critical nature of healthcare services. This study presents a comprehensive techno-economic, environmental, reliability, and operational assessment of biomass-supported hybrid renewable energy systems across five climatically distinct…...

3+ day, 4+ hour ago   (524+ words) A piezoelectric cantilever with a longitudinal slit splits one bending resonance into two closely spaced peaks. This is attractive for two-frequency sources. However, existing models fit, rather than predict, the resonances. We develop a predictive branched-beam model where the harvester…...

3+ day, 22+ hour ago   (331+ words) Shale gas reservoirs can develop extensive fracture networks via hydraulic fracturing. Nevertheless, gas stored in matrix pores remains hard to produce efficiently. Thermal stimulation helps trigger secondary fracture growth inside the matrix and forms multiscale gas-water flow channels to improve…...

4+ day, 4+ hour ago   (527+ words) Safety monitoring and visual surveillance in underground coal mines must cope with extreme low light and pervasive coal dust, yet the most accurate low-light image enhancement models rely on self-attention, whose quadratic cost precludes real-time use on the edge-computing platforms…...

4+ day, 22+ hour ago   (488+ words) Two-box edge girders are widely employed in bridge engineering owing to their superior mechanical properties. However, these girders are susceptible to vortex-induced vibrations (VIVs) due to their blunt configuration. Therefore, it is of great significance to study their VIV performance…...

6+ day, 7+ min ago   (437+ words) Reliable electricity supply is essential for healthcare institutions, particularly where grid instability can disrupt service continuity, compromise patient safety, and affect the operation of critical medical equipment. In this context, selecting an appropriate photovoltaic (PV) proposal is a complex decision…...

6+ day, 4+ hour ago   (493+ words) Transmission congestion has become a major challenge in deregulated power systems (DPS). Although flexible AC transmission system (FACTS) devices are effective for congestion management, their high installation cost and complex control requirements limit widespread deployment. This paper proposes a battery…...

6+ day, 7+ hour ago   (519+ words) The increasing demand for lithium-ion batteries (LIBs) highlights the need for efficient recycling strategies to recover critical materials and reduce environmental impact. This study presents an optimized hydrometallurgical process for the recovery of lithium (Li) and iron (Fe) from spent lithium…...