Zhengzhou University of Science and Technology

Machine Learning Prediction Models for Compressive Strength of Concrete with Industrial Waste Materials at Elevated Temperatures

Background: Concretes utilized in very high temperature zones, for example, furnaces in chimneys, refineries, and nuclear facilities for the disposal of waste, are exposed not only to temperature changes but also to variations in humidity, all of which drastically impact their Co...

Scaled-down model test research on effective ratio of transverse bending stiffness for large-diameter shield tunnel

the effective ratio of transverse bending stiffness ( η ) is a key parameter in the modified conventional method for segments of large-diameter shield tunnel, and it significantly influences the internal forces of these segments. Based on similarity theory (with the tunnel joint...

Photogenerated Radical-Based Dual-Wavelength Responsive Photochromic Ionic Hydrogen-Bonded Organic Frameworks for Multiform Advanced Information Storage and Encryption

Dual-wavelength response photochromic materials have attracted considerable attention due to their unique responsive characteristics and the synergistic enhancement of information security enabled by dual-dimensional (time-wavelength) control. We report a pair of chiral ionic hyd...

Dynamic obstacle avoidance method for 3D animation group based on multi-agent reinforcement learning

At the forefront of 3D animation, virtual reality and robotics, it is difficult to realistically and efficiently simulate the group behavior of a large number of people and objects. Previously, traditional rule-based or optimization-based methods often encountered critical proble...

Application and research of image watermark based on free visual size optimization JND algorithm

To address the problems of perceptual redundancy estimation in digital image watermarking, which are poor adaptability to fixed-size inputs and insufficient coordination between local and global visual features, a perceptual redundancy estimation based on perceptually sensitive s...

Network analysis of smartphone addiction, attentional control, and learning adaptation among nursing undergraduates

In the digital learning environment, learning adaptation and attentional control have been shown to be important factors associated with academic success among nursing undergraduates. Smartphone addiction has been associated with impaired attentional control and poorer learning o...

Motivational orientation and influencing factors of older adults with chronic obstructive pulmonary disease in community dwellings: a latent profile analysis

Chronic obstructive pulmonary disease (COPD) poses a serious threat to older adults’ health. Promoting the adoption of health behaviors among community-dwelling patients is essential for improving prognosis, with motivational orientation serving as a key determinant of health beh...

Entertainment Sedentary Time and Subjective Well-Being in College Students: A Moderation Model of Perceived Time Poverty

This study examined the association between entertainment sedentary time (EST) and subjective well-being (SWB) among Chinese college students and further explored the moderating role of perceived time poverty (PTP). A total of 1582 college students completed questionnaires assess...

Breathing ferroelectricity, flat-bands and multiple chiral phonons in van der Waals breathing kagome Nb3Cl8

Van der Waals layered Nb3X8 (X=Cl, Br, I) are predicted to integrate multiple intriguing physical properties, notably multiferroicity and flat-bands that are highly promising for novel-principle memories and superconductors. However, direct experimental validations such as the pr...

Joint effects and mediating mechanisms of body roundness index and biological aging on the risk of incident cardiovascular disease: a nationally representative prospective cohort study

Body roundness index (BRI) and biological aging are critical drivers of cardiovascular disease (CVD). However, their joint pathogenic effects and underlying mechanisms in the development of CVD remain elusive. This study aims to investigate the independent and joint effects of BR...

The influence of MoS 2 lubricity on the secondary cutting performance of PCD micro-groove textured tools

Micro-textured cutting tools possess unique advantages in reducing cutting forces, lowering chip temperatures, minimizing tool wear, and improving machined surface quality. Nevertheless, the secondary cutting effect induced by micro-textures impairs texture integrity and aggravat...