Chongqing University of Science and Technology

Research on the Whirling and Vibration Characteristics of Steel–Titanium Alloy Composite Drill Strings for Ultra-Deep Wells

To address whirling- and vibration-induced failures in ultra-deep well drill strings caused by high slenderness ratios and complex loading conditions, this study establishes a nonlinear dynamic finite element model for a steel–titanium alloy composite drill string. The model is d...

Rigid polymer matrix enables direct red afterglow from rhodamine dyes without energy transfer

Abstract Room‐temperature phosphorescence (RTP) materials have garnered significant attention for their unique optical properties in information encryption and bioimaging. While triplet‐singlet Förster resonance energy transfer strategies have been employed to endow traditional f...

The key factors controlling the microstructural damage and its quantitative characterization in mudstone caprocks

Abstract Previous studies on mudstone caprock damage in underground gas storage (UGS) have largely focused on the macroscopic sealing failure, while the microstructural damage mechanism and the key controlling factors remain unclear. In particular, the microstructural damage has...

Assessing the toxicological effects of synthetic musk ketone using the Caenorhabditis elegans model

Synthetic musk ketone (MK) is extensively used in perfumes, cosmetics, and detergents. Due to its high lipophilicity, persistence, and limited removal efficiency in wastewater treatment, MK has been detected in various environmental matrices and human tissues. However, the ecotox...

Temporal and spatial distribution characteristics of nighttime air exchange rate and indoor air pollutants in university dormitories

Indoor air quality of dormitories is significantly associated with physical health and learning efficiency among college students, but few studies have evaluated the long-term ventilation and indoor air pollutants in university dormitories. In this study, continuous monitoring of...

On the Periodic Cauchy Problem for the μ‐Modified Camassa‐Holm‐Novikov Type Equation

ABSTRACT This paper delves into the intricate periodic Cauchy problem associated with the ‐modified Camassa‐Holm‐Novikov equation. We first rigorously demonstrate that the occurrence of blow‐up phenomena in this equation is exclusively manifested through the formation of breaking...

Thermoresponsive mineral grout for autonomous oxygen isolation in underground coal pillars

A thermo-responsive mineral-based grout composite (GC) was developed for rapid sealing of fracture networks in underground coal pillars, aiming to eliminate oxygen ingress and prevent spontaneous combustion in goaf areas. Coal spontaneous combustion triggered by air leakage poses...

Study on Stability of Equal-Leg Angle-Steel Members in Transmission Towers at Uniform Elevated Temperature

Equal-leg angle-steel members are widely used as main load-bearing and bracing members in transmission towers. Under elevated-temperature environments such as mountain fires and forest fires, the elastic modulus and strength of steel degrade significantly, which may reduce the ov...

MOIR-Net: A Lightweight Crop Disease and Pest Recognition Network Based onMulti-Scale Reparameterization and Energy Attention

Accurate crop pest recognition is critical for intelligent agriculture, yet it remains constrained by the inherent trade-off between complex field variability and the stringent resource limitations of edge devices. In this study, MOIR-Net, a lightweight framework, is proposed to...

Design and evaluation of magnesium phosphate cement mortar protective layer for concrete structure protection in salt lake environment

Magnesium phosphate cement (MPC) is recognized as an ideal material for concrete protection in salt lakes due to its rapid hardening, high early strength, good bonding, and volume stability. In this study, the MPC mortar was modified with mineral admixtures and polymers and its p...

Discrimination of Tight Sandstone Reservoir Effectiveness Based on Pore-Throat Functional Fractal Characterization and Three-Dimensional Pore-Network Connectivity Constraints

Tight sandstone reservoir effectiveness is governed not by pore volume alone, but by the storage and flow contributions of different pore-throat scales, their structural complexity, and their three-dimensional connectivity. This study investigates tight sandstones of the Benxi Fo...

Research Progresson Rapid Dissolution Technologyof Polymers for Offshore Oilfields

Abstract As global onshore oil and gas resources gradually become depleted, offshore oilfields are playing an increasingly critical role in energy supply. Polymer flooding represents a highly efficient chemical enhanced oil recovery technique in an offshore oil field, yet its off...

An SPCL-Stacking ensemble learning framework for landslide susceptibility assessment

Abstract Background Machine learning has been increasingly applied to data driven landslide susceptibility assessment. However, false negative label noise introduced during negative sample selection and the limited predictive capability of single models remain unresolved issues....

A Physics-Guided Dehazing Method Based on Polarization Imaging

Haze conditions degrade image quality via atmospheric scattering and absorption, posing challenges for optical imaging applications. In recent years, deep learning has emerged as an effective method for dehazing images. However, data-driven deep learning dehazing methods typicall...

Precise Management of n‐Value Distribution at the 2D/3D Interface Enabling Efficient Wide‐Bandgap Perovskite Solar Cells

Introducing a 2D perovskite layer on the surface of 3D perovskite has been broadly recognized as an effective strategy to enhance the performance of perovskite solar cells (PSCs). However, the mechanism governing the 2D phase formation remains uncertain. In this work, the phase t...

Supply chain resilience in China’s construction industry: spatiotemporal trends and forecast

Construction industrialisation is regarded as a core pathway to improve construction efficiency and reduce resource consumption amid the global urbanisation. However, existing research has verified that the instability of its supply chain system hinders the sustainable developmen...

An Enhanced YOLOv8 Algorithm with C2f_Parnet for Vehicle and Pedestrian Detection

This paper proposes enhancements to the YOLOv8s model for autonomous driving object detection tasks. Firstly, a C2f Parnet module is designed based on the Parnet parallel network architecture to reduce network depth and computational latency. Secondly, GSConv is modified by emplo...

A Caputo Fractional SLBS Computer Virus Model with Stage-Specific Holling Type-II Incidence

Computer virus propagation (CVP) models translate malware movement in a network into analyzable dynamical systems. Two features are especially important for modern networks: infected hosts may remain latent before a damaging burst, and infection efficiency is usually saturated by...

Effect of baking temperature on an organic-inorganic hybrid coating for magnesium alloy AZ31B

Purpose The purpose of this paper is to systematically investigate the effect of baking temperature on the morphology, thickness, adhesion and corrosion resistance of an organic-inorganic hybrid coating applied to magnesium alloy AZ31B, trying to elucidate the intrinsic curing-te...