Article
Construction & Building Technology
Chen Xia, Fengbo Sun, Zhuoqun Zhou, Teng Liu, Chengzhi Qi
Summary: With the rapid development of transportation networks in China, numerous tunnels are being constructed or planned in mountainous areas. However, some tunnels have to pass through active fault zones which can lead to their destruction. The current Chinese codes suggest three measures, but lack a quantitative design method. This study presents a design method for anti-dislocation deformation joints to enhance the ability of tunnels to withstand fault dislocation. Experimental model tests and numerical analyses were conducted to validate the method, and the results demonstrate its effectiveness in reducing the forces and bending moments on the tunnel lining. The proposed method can help mitigate the seismic damage of tunnels passing through active fault zones.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2022)
Article
Engineering, Multidisciplinary
Meng Ma, Minghang Li, Xiangyu Qu, Hougui Zhang
Summary: The intensity of metro-induced vibrations in tunnels is influenced by the condition of train wheels, causing significant differences in vibration intensity between passing trains. Vibration responses in tunnels increase with the operating mileage of passing trains, but decrease after wheel re-profiling.
Article
Multidisciplinary Sciences
Ryosuke Watanabe, Shiori Tanaka, Godai Miyaji, Daisuke Yoshino
Summary: Plasma medicine, using atmospheric-pressure plasma, is an innovative therapy attracting attention in the medical field. It can directly or indirectly affect lesions, promoting transdermal absorption for pharmaceutical and cosmetic applications.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Mechanical
Jun Lai, Jingmang Xu, Ping Wang, Zheng Yan, Shuguo Wang, Rong Chen, Jialin Sun
Summary: The study focused on the derailment of railway vehicles in turnouts, conducting field investigations and establishing dynamic models to analyze the derailment mechanism. Results showed that the simulation results were consistent with field investigations, indicating that the safety of the bogie depends on the status of both front and rear wheelset. This research provides valuable insights into dynamic derailment behavior and offers guidance on preventing wheel flange derailment in turnout areas.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Geosciences, Multidisciplinary
Xiangdong Niu, Huafen Sun, Kepeng Hou
Summary: This study investigated the flow-through characteristics of fine particulate matter in a mixed particle flow system. The experiment utilized a laboratory 3D physical model test method to analyze the flow of fine particles under uniform ore drawing conditions. The results showed that the smaller the particle size, the more significant the flow-through degree. Understanding these characteristics has both theoretical and practical significance for controlling ore lean loss and preventing mine disaster accidents in caving mining.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Engineering, Geological
Galina N. Antonovskaya, Irina P. Orlova, Natalia K. Kapustian
Summary: The degradation of railway subgrade in Russia is a common cause of train accidents due to the extensive railway system and weak soil conditions. In this study, a seismic monitoring technique utilizing moving trains as signal sources was introduced to probe the properties of the subgrade. By processing and analyzing the recorded signals from seismic sensors, the sensitive parameters of low-frequency signals generated by passing trains were identified, providing insights into changes in the subgrade state. Furthermore, an analytical model considering the viscosity of the substrate layer was proposed to describe the interaction between moving trains and the subgrade, allowing for an estimation of soil elasticity and viscosity caused by seasonal thawing.
CANADIAN GEOTECHNICAL JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Qi Wu, Bing Han, Jiaping Yu, Wutong Yan, Jinquan Zhang, Huibing Xie
Summary: This paper discusses the influence of vehicle parameters on the accuracy of identifying the bridge fundamental frequency from a passing vehicle and validates such influence through laboratory tests. It is found that the vehicle-to-bridge mass ratio and vehicle speed have a significant impact on the patterns of identified bridge frequency, and increasing the vehicle speed and vehicle-to-bridge mass ratio can lead to a higher deviation rate of the bridge frequency. Therefore, when identifying the bridge frequency, the influence of vehicle parameters should be taken into consideration.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Civil
Junyan Wang, Tiantian Wang, Mingzhi Yang, Bosen Qian, Kaiwen Wang
Summary: The study used a moving model to simulate the effect of high temperature at the entrance of a tunnel on the aerodynamic performance of a high-speed train. Results showed that pressure fluctuations decrease in high temperature tunnel conditions. The study aims to inspire further research on transient pressures in localized high temperature railway tunnels.
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
(2021)
Article
Computer Science, Artificial Intelligence
Xue Li, Yuanzhi Cheng
Summary: The effectiveness of the message aggregator in graph neural networks is not primarily due to the optimization of edge weights, but rather can be achieved through randomized attention. This finding emphasizes the importance of the network topology in achieving superior performance for message passing iterations.
KNOWLEDGE-BASED SYSTEMS
(2022)
Article
Automation & Control Systems
Randa Herzallah, David Lowe, Yazan Qarout
Summary: There is currently a lack of comprehensive understanding on how to apply fully decentralized control to networks of sparsely coupled nonlinear dynamical subsystems subject to noise to track a desired state. Research results demonstrate that utilizing probability theory and local message passing can implicitly infer global knowledge, enabling control of a global state through decentralized control signals applied to local subsystems without reference to a global current state.
IEEE TRANSACTIONS ON SYSTEMS MAN CYBERNETICS-SYSTEMS
(2022)
Article
Metallurgy & Metallurgical Engineering
Hu Hao, Xiang Huo-yue, Liu Ke-hong, Zhu Jin, Li Yong-le
Summary: This article discusses the controlling factors in wind-vehicle-bridge systems when two trains pass each other and proposes a wind tunnel testing device to measure the aerodynamic characteristics of moving vehicles under crosswinds. The results show that the test device has good repeatability, and the intersection mode, yaw angle, and lane spacing affect the aerodynamic coefficients of the leeward train. Additionally, there is a significant difference in aerodynamic coefficients between the head vehicle and the tail vehicle.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2022)
Article
Engineering, Civil
Xiaofang Li, Zaixin Wu, Jizhong Yang, Lei Zhang, Dan Zhou, Tianen Hu
Summary: Transient pressure variations on the surfaces of trains and platform screen doors (PSDs) were studied using a moving model test device. The study explored the propagation characteristics of pressure waves induced by high-speed trains passing through underground stations and tunnels. The study also analyzed the effects of train speed and station ventilation shaft position on pressure distribution. Ventilation shafts were found to influence the pressure waveform on train and PSD surfaces, and reduce peak pressure significantly. Single and double shafts at the rear end of the platform and the station, respectively, had the most significant impact on relieving transient pressure.
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
(2022)
Article
Computer Science, Artificial Intelligence
Li Zhang, Mohan Chen, Anurag Arnab, Xiangyang Xue, Philip H. S. Torr
Summary: In this paper, a dynamic graph message passing network is proposed to reduce the computational complexity compared to related works. Nodes in the graph are adaptively sampled for message passing, and node-dependent filter weights and affinity matrix are dynamically predicted for information propagation. Experimental results show significant improvements on four different tasks compared to baselines.
IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE
(2023)
Article
Operations Research & Management Science
Roberto Cominetti, Matteo Quattropani, Marco Scarsini
Summary: The paper discusses two classes of games where players are vertices of a directed graph, passing a "buck" to neighbors to maximize or minimize receiving frequency. Pure equilibria independent of initial distribution are proven to exist. In the case of a minimizing game on a graph with a Hamiltonian cycle, Nash equilibria are reached, with fairness measured using the price of anarchy and stability.
MATHEMATICS OF OPERATIONS RESEARCH
(2021)
Article
Clinical Neurology
John T. Butterfield, Clark C. Chen, Andrew W. Grande, Bharathi Jagadeesan, Ramachandra Tummala, Andrew S. Venteicher
Summary: Balloon test occlusion has a low rate of subsequent ischemic events, with no conclusive evidence of variation between methods of perfusion assessment. The choice of method should focus on reducing complication risk, the experience of the interventional team, and avoiding prolonged test occlusion times.
WORLD NEUROSURGERY
(2021)