Article
Engineering, Mechanical
Terenziano Raparelli, Luigi Mazza, Andrea Trivella
Summary: The paper describes tests conducted to determine the effectiveness of a simple method for reducing friction force in linear pneumatic actuators. The method involves using commercial lip seals in a non-conventional manner, mounted opposite to conventional installations. Two different non-conventional installations were tested, using commercial spring-energized seals made of different materials. The performance was evaluated by comparing leakage flow rate and friction force between the proposed installation and conventionally mounted seals.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Engineering, Mechanical
Yan Shi, Jiaqi Chang, Yixuan Wang, Xuelin Zhao, Qingzhen Zhang, Liman Yang
Summary: This paper proposes a differential pressure fitting method for an asymmetric differential pressure cylinder, overcoming some limitations of traditional methods. Experimental results validate the accuracy and effectiveness of this method.
CHINESE JOURNAL OF MECHANICAL ENGINEERING
(2022)
Article
Engineering, Civil
Marc Ehret
Summary: Braking forces in passenger trains are generated by disc brake units, with friction forces influenced by various factors such as relative velocity, temperatures, and normal pressure. A mathematical model has been developed to link these variables to the friction coefficient for accurate estimation of braking distances.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART F-JOURNAL OF RAIL AND RAPID TRANSIT
(2021)
Article
Automation & Control Systems
Zbigniew Pater, Janusz Tomczak, Tomasz Bulzak
Summary: Railcar axles are large-size parts manufactured using forging methods, and more efficient manufacturing methods are being sought. Cross wedge rolling (CWR) is a promising line of research in this respect. However, there are currently no rolling mills capable of manufacturing such large-size parts. By taking advantage of the symmetric shape of a railcar axle, simulations were made to demonstrate the effectiveness of a proposed rolling process, and the high quality of railcar axles produced under industrial conditions confirmed the effectiveness of the developed CWR method.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Computer Science, Artificial Intelligence
Yun Yuan, Yu Guan, Jingou Huang, Xin Li
Summary: Water-rail intermodal transportation can reduce cargo losses and transportation transferring costs. However, the imbalance between the capacity of the scheduled railway network and the large container freight demand greatly reduces operational efficiency. To minimize the total transportation cost and relocation cost, a railcar reallo-cation stochastic optimization model is formulated to deal with uncertain congestion in the railway network. To capture the uncertain busyness and queuing pattern, a hypercube spatial queue model is embedded in the optimization model by estimating the expected queue length and waiting time. To solve the proposed nonlinear nonconcave stochastic model, an approximate hypercube based iterative algorithm is proposed. A real-world case study is presented to show the effectiveness and efficiency of the proposed method. The proposed model outperforms the comparable deterministic model in the objective value. Sensitivity analyses on the ratio of the unit waiting cost and the unit travel cost for empty cars, and the total number of freight cars show the robustness of the proposed method.
ADVANCED ENGINEERING INFORMATICS
(2023)
Editorial Material
Hematology
Seong Lin Khaw, Paul Ekert
Summary: This study in Blood identifies a novel biomarker for poor outcome in acute lymphoblastic leukemia (ALL) and elucidates the biological connection between miR-497/195 repression and more aggressive disease.
Article
Economics
Yue Zu, Ruhollah Heydari, Kiran Chahar, Yudi Pranoto, Clark Cheng
Summary: This article presents a novel solution called Pre-blocking through Re-waybilling to minimize railcar cuts in freight railways by re-assigning empty railcars to customers, while considering supply, demand, and feasibility constraints.
TRANSPORTATION RESEARCH PART E-LOGISTICS AND TRANSPORTATION REVIEW
(2022)
Article
Engineering, Mechanical
Mustafa Dagdelen, Mehmet Ilteris Sarigecili
Summary: In this study, the friction torque estimation for semi-rotary pneumatic actuators has been automated using MATLAB/Stateflow (R) tools, which eliminates potential user or random errors and allows for more data processing. The system, integrated with a graphical user interface, enables easy utilization of the automated setup. The automated method accurately estimates the friction parameters and proves to be very helpful in control applications.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2023)
Review
Immunology
Catherine Sabatel, Fabrice Bureau
Summary: Respiratory mucosal surfaces are continuously exposed to innocuous non-self antigens and pathogen-associated molecular patterns (PAMPs). Despite the potential for immune responses, there are regulatory mechanisms in the lung that tightly control immune homeostasis and prevent the development of aberrant immune responses. Understanding these mechanisms could lead to the development of new therapeutic strategies for lung diseases like asthma.
FRONTIERS IN IMMUNOLOGY
(2023)
Article
Automation & Control Systems
Lingling Lv, Bingqian Zheng, Jinhua Zhang, Lei Zhang
Summary: This paper studies the parameter identification problem of linear discrete period time-varying (LDPV) systems and proposes a two-step identification algorithm based on the recursive least squares principle. By converting the LDPV system into a linear time-invariant system and combining with recursive least squares identification, a discrimination algorithm is suggested for parameter estimation.
IET CONTROL THEORY AND APPLICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Gerardo Hurtado-Hurtado, Luis Morales-Velazquez, Frank Otremba, Juan C. Jauregui-Correa
Summary: This research investigates the vibrations of a railway vehicle during braking and examines their relationship with the friction coefficient. The findings show that tangential forces have a significant impact on railway vehicles, especially under high friction coefficients and large creep values conditions.
APPLIED SCIENCES-BASEL
(2023)
Article
Energy & Fuels
Ahmed M. Nassef, Ahmed Fathy, Hegazy Rezk, Dalia Yousri
Summary: In this research, a new identification method based on the blade eagle search algorithm (BES) is proposed to extract the optimal parameters of the supercapacitor model. The results show that the proposed approach is promising in constructing a reliable equivalent circuit of supercapacitors and estimates the parameters' values very close to the real ones.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Engineering, Electrical & Electronic
Peng Wang, Zhenyuan Zhang, Tengfei Ma, Qi Huang, Wei-Jen Lee
Summary: This article proposes a novel parameter calibration approach for large-scale Wind Farm (WF) models, which accurately locates and adjusts the parameters through trajectory sensitivity and error tracing techniques, thereby improving model performance.
IEEE TRANSACTIONS ON POWER SYSTEMS
(2023)
Article
Chemistry, Multidisciplinary
Mengli Liu, Liang Chen, Zaiwang Zhao, Minchao Liu, Tiancong Zhao, Yuzhu Ma, Qiaoyu Zhou, Yasseen S. Ibrahim, Ahmed A. Elzatahry, Xiaomin Li, Dongyuan Zhao
Summary: In this study, the application of near-infrared optical brakes in mesoporous nanomotors was successfully achieved, enabling remote speed control of enzyme-based nanomotors. This innovative approach offers great potential for designing smart active drug delivery systems based on nanomotors.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Engineering, Civil
Renjie Shen, Xiangdong Qian, Jianfang Zhou, Chin-Long Lee
Summary: In this paper, a modified eigensystem realization algorithm is extended to nonviscous damping system for modal parameter identification and relaxation parameter calculation. The state space formulation is used to express the equation of motion with nonviscous damping. The proposed method establishes a nonlinear relationship between the eigenvalues and the damping parameters of a nonviscous damping system. The accuracy of the method is verified through numerical examples.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2023)
Article
Engineering, Mechanical
Tadeusz Piechowiak
VEHICLE SYSTEM DYNAMICS
(2009)
