Article
Engineering, Geological
Ke Ma, Guoyang Liu, Nuwen Xu, Zhenghu Zhang, Bo Feng
Summary: Through field experiments and three-dimensional discontinuous deformation analysis (3D DDA) method, this study investigated the motion characteristics of rockfalls under different conditions, revealing the laws of rockfall movements and quantitatively obtaining the evolution of motion characteristics under different conditions.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2021)
Article
Environmental Sciences
Jiewei Zhan, Zhaoyue Yu, Yan Lv, Jianbing Peng, Shengyuan Song, Zhaowei Yao
Summary: This study aims to establish an early identification framework for potential rockfall sources and assess rockfall hazards in the Taihang Grand Canyon Scenic Area in China using unmanned aerial vehicle (UAV) photogrammetry. The study combines high-precision topographic information and geotechnical properties for static identification of potential rockfall sources, and uses SBAS-InSAR technology to describe their activity. The results show that potential rockfall sources mainly distributed on the cliffs of the canyon, and the proposed UAV-based real scene modeling technology proved to be able to construct a 3D high-precision model of the area accurately and quickly.
Article
Engineering, Geological
Guoyang Liu, Junjie Li, Zhuangzhuang Wang
Summary: This study focused on the movement characteristics and disaster processes of rockfalls using 3D-DDA, verifying its effectiveness through outdoor experiments. The results showed that by analyzing the trajectories and kinetic energies of rockfalls, prediction of disasters and design of protective measures could be achieved. The 3D-DDA method was able to effectively simulate the entire rockfall process in time and space, contributing to a comprehensive understanding of rockfall phenomena and behaviors.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Geosciences, Multidisciplinary
Shao-Zhen Duan, Guang-Li Li, Xin Yang, Xin-Rong Wei
Summary: The study aims to establish a statistical model of random rockfall-slope collision considering the movement of the impacted stones using the impulse moment theorem. The means and standard deviations of rebound velocity are calculated based on probability theory. The probability distribution functions of the horizontal and vertical distances are analyzed.
Article
Geosciences, Multidisciplinary
Yuanyuan He, Lei Nie, Yan Lv, Hong Wang, Senfeng Jiang, Xiaohan Zhao
Summary: This paper investigates rockfall hazards on a slope in Dalian, China using field experiments, software simulation, and discrete element method (DEM) simulation. Comparing the results, DEM simulation is found to be more accurate. The study provides insights into rockfall movement and can help in designing safety engineering measures.
Article
Multidisciplinary Sciences
Xiaomei Li, Francisco Bodziony, Mariana Yin, Holger Marschall, Ruediger Berger, Hans-Juergen Butt
Summary: Liquid drops sliding on tilted surfaces is a common phenomenon with significant industrial applications. Despite its importance, predicting the sliding velocity of the drops is currently impossible. In this study, we measured various parameters of sliding liquid drops on inclined flat surfaces made of different materials, and found that the friction force can be described empirically by a specific equation for a certain velocity range. The dimensionless friction coefficient, which varies between 20 to 200, is a material-specific parameter that is necessary for understanding dynamic wetting.
NATURE COMMUNICATIONS
(2023)
Article
Engineering, Geological
Wen Zhang, Xiaohan Zhao, Xiaojuan Pan, Ming Wei, Jianhua Yan, Jianping Chen
Summary: This study reconstructs a clear 3D geological model using nap-of-the-object photogrammetry to identify rockfall geological hazards in mountainous areas. It also proposes a new methodology for 3D rockfall risk statistical analysis, allowing for targeted rockfall simulations and risk analysis on tunnel portals.
ENGINEERING GEOLOGY
(2022)
Article
Engineering, Geological
Guangqi Chen, Mingyao Xia, Dao Thanh Thuy, Yingbin Zhang
Summary: This paper investigates the mechanism of earthquake-induced landslides and identifies the characteristics of landslides under different seismic conditions. It suggests that pulse-like ground motion may be a major triggering factor for co-seismic landslides in the near-fault region, emphasizing the initiation mechanism of earthquake-induced landslides.
Article
Chemistry, Multidisciplinary
Xueliang Jiang, Wenjie Liu, Hui Yang, Zhenyu Li, Wenchen Fan, Feifei Wang
Summary: Although current ecological engineering technology can reinforce shallow landslides, it cannot reinforce deep landslides. A new type of ecological engineering technology called living tree stump slope protection was developed to address this issue. The mechanical properties of the living stump slope and root system were analyzed using a finite element method and the Mohr-Coulomb failure criterion was used to consider the mechanical plasticity of the soil. The simulations showed that long taproots increased the stability of the slope by moving the soil shear stress area to deeper layers and the root system in the middle and lower part of the slope played a positive role in stability.
APPLIED SCIENCES-BASEL
(2023)
Article
Construction & Building Technology
Mahnaz Bahremandi-Tolou, Maziar Asefi, Sajjad Sharib, Nazanin Vaseei, Ahmadreza Haji Vosough
Summary: An essential step in designing kinetic structures in architecture is how to cover them. This study aims to provide a solution for creating a real-scale kinetic rigid cover for spherical scissor-like element structures (SLEs) by using parametric simulation and analytic geometry to prove its feasibility. The dynamic mechanism, geometric behavior of covering panels, and the type of material and joints are identified as the main factors influencing the design.
AUTOMATION IN CONSTRUCTION
(2022)
Article
Computer Science, Artificial Intelligence
Xin Zhang, Zhongqiu Xu, Hongbo Liao
Summary: This paper investigates methods for human motion detection and demonstrates the advantages of using image features and machine learning in human tracking through experiments. The final test results show that the proposed method achieves 5% higher accuracy compared to previous methods and achieves a recognition rate of 95% in human motion tracking.
NEURAL COMPUTING & APPLICATIONS
(2022)
Article
Engineering, Civil
Cansen Jiang, Danda Pani Paudel, David Fofi, Yohan Fougerolle, Cedric Demonceaux
Summary: In this study, a framework is proposed to detect and extract moving objects from a sequence of unordered point clouds for building high-quality static maps. The accurate detection and segmentation of moving objects are achieved through 3D flow field analysis and sparse flow clustering algorithm.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2021)
Article
Chemistry, Analytical
Masato Tsuru, Adrien Escande, Iori Kumagai, Masaki Murooka, Kensuke Harada
Summary: This study presents a rapid motion-replanning technique driven by a semantic 3D voxel mapping system, which is crucial for humanoid robots to autonomously navigate unknown territories through online environmental sensing. By utilizing semantic voxel mapping and the innovative Extended-Octomap (ExOctomap) structure, the technique enables efficient semantic accessibility and collision-free trajectory search.
Article
Multidisciplinary Sciences
Tong Liu, Xianyue Shen, Qingming Ji, Jianlin Xiao, Jianlin Zuo, Zhongli Gao
Summary: This study investigated the displacements and 3D morphological changes of knee menisci under weight-bearing and early flexion conditions in healthy adults using MRI technology. The research revealed that menisci showed different changes in morphological patterns under various flexion angles and external loading conditions, providing a valuable reference for evaluating meniscal integrity.
SCIENTIFIC REPORTS
(2021)
Article
Automation & Control Systems
Jing Yu, Xi-meng Lin, Yan-ling Yang, Jin-Hui Cai
Summary: This study designed a new type of scanning probe, analyzed and tested its static and dynamic characteristics to ensure the accuracy of the probe, thus improving the measuring precision of the machine.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
