North China University of Water Resources and Electric Power

Research on the impact mechanical response characteristics of gas containing coal and rock based on RSM

To investigate the dynamic mechanical behavior of gas-containing coal in deep coal mines, dynamic compression tests were conducted on gas-containing coal using a 50 mm diameter split Hopkinson pressure bar (SHPB) system. The central composite design (CCD) method within response s...

Diagnosis of abnormal voltage in individual cells and fault trend prediction in energy storage power stations

Abstract During the operation of energy storage power stations, individual cells are prone to voltage inconsistency and abnormal voltage fluctuations due to manufacturing variations, inconsistent aging degrees, and changes in operating conditions. To address this issue, this stud...

Observations of groundwater-surface water exchange effects on emerging pollutants in a subtropical catchment

The occurrence of emerging pollutants (EPs) in aquatic environments is a major threat to natural ecosystems and human health, but the connections between EPs in surface water and groundwater have been largely unexplored. Here, a total of 38 EPs, including antibiotics, per- and po...

Mineral Chemistry and Genetic Constraints on Yiyuan Jade, Eastern Qinling Orogen, China

Yiyuan jade, a specific gem-quality jade variety in the East Qinling Orogen, occurs as lenticular and vein-shaped bodies hosted within the dolomite and biotite-quartz marble of the Neoproterozoic Meiyaogou Formation. Based on detailed petrological and mineralogical characterizati...

Effectiveness of Joint Liability Mechanism in Controlling Unsafe Behaviour of Coal Miners: A Stochastic Evolutionary Game Model

ABSTRACT The joint liability mechanism is widely used to control unsafe behaviour of coal miners. However, existing research on its effectiveness remains controversial, partly because most studies regard the number of members subject to joint liability constraints as a fixed valu...

The contagion effect: time-varying volatility spillovers between cryptocurrencies and commodities during systemic shocks

This study examines the dynamic volatility spillovers between 10 prominent cryptocurrencies and commodities (Brent oil, WTI, and gold), along with the US Dollar Index (USDX), to understand their roles as hedges and safe-haven assets in turbulent market conditions. We examine dail...

Study on mechanical properties and damage evolution of mortar reinforced by mixing basalt, carbon and polyester fibres in pairs

Fibre-reinforced mortar (FRM) has attracted much attention owing to its excellent mechanical properties. To further explore the influence of blended fibres on the mechanical properties and damage evolution of internal cracks in FRM, the effects of blended additions of basalt fibr...

Effect of Maternal Genotype on Chromosomal Introgression in Lilium (Liliaceae) Hybrids from Parents Producing Aneuploid Female and Male Gametes (AAA × LAAA and LAA × LAAA)

Interspecific hybridization is a key strategy for germplasm innovation in lilies (Lilium spp., Liliaceae). However, successful hybridization between aneuploid female and aneuploid male gametes has not been reported in this genus. We used two triploid female parents—autotriploid (...

Effects of dosage, inorganic salts and polymers on the high-temperature rheological characteristics of bentonite, attapulgite and sepiolite suspensions

Understanding the high-temperature rheological behavior of mud-forming clays is critical for designing drilling fluids suitable for deep wells. The rheological properties of bentonite (BET), sepiolite (SEP), and attapulgite (ATP) are systematically investigated from 40 to 220 °C...

Numerical Assessment of the Stamping Formability of SS304 Metallic Bipolar Plates with Side-Boss Parallel Flow Channels

Side-boss parallel channels can enhance reactant transport and water removal in proton exchange membrane fuel cells, but their local protrusions increase the forming difficulty of ultra-thin metallic bipolar plates. This study numerically investigates the single-step stamping for...

A physics-informed PointNet + + for hand gesture recognition using radar point cloud

Hand gesture recognition based on mmWave radar point clouds has excellent potential in the human-computer interaction field. However, conventional approaches often underutilise raw data and fail to incorporate the underlying physical properties of radar echoes, resulting in a poo...

Response of Mechanical Properties in PVC-P GMB to Tensile Rate and Low Temperature

Plasticized polyvinyl chloride (PVC-P) geomembranes (GMBs) are widely used in cold regions as impervious barriers, facing combined low-temperature and variable loading effects. However, design specifications rely on room-temperature tests at fixed rates, not reflecting actual con...

Dual-Spatial-Scale Assessment of Watershed Water Yield Responses to Land-Use Change in the Upper Yangtze River Basin

Understanding how land change affects water yield is essential for sustainable land management and water security. However, previous studies often rely on a single model or spatial scale, limiting their ability to capture fine-scale land-surface heterogeneity and basin-integrated...

Spatiotemporal Evolution and Driving Mechanisms of Soil Drought in the Haihe River Basin (2000–2022) Based on the Standardized Soil Moisture Index

Accurately depicting the spatiotemporal evolution patterns and driving mechanisms of soil drought is of great significance for regional agricultural drought warning and adaptive management of water resources. There are still shortcomings in the existing research in terms of indic...