This paper investigates the seismic performance of the prefabricated concrete-filled steel tubular (CFST) bridge pier in the bridge system-level. The proposed prefabricated CFST bridge pier is composed of circular thin-walled CFST double-column, precast I-shaped tie beams, and precast RC cap beam, which are assembled by simply on-stie assembly connections, with advantages in good seismic performance, convenient construction, and comparable material cost. A total of 12 two-span continuous beam bridge cases are designed, including 2 typical bridges with reinforced concrete (RC) piers and 10 bridges with CFST piers. Numerical research on the hysteretic performance of piers in bridge cases, dynamic responses of all bridge cases, and their seismic fragility. The results demonstrate that prefabricated CFST piers outperform RC piers in both load-bearing capacity and energy dissipation, and these piers exhibit reduced transversal displacement at the top and decreased maximum curvature when

Gu, Chao, Wang, Xuanding

Research on the Visibility Attenuation Model of Pavement Markings for Older Drivers Based on Retroreflective Luminance Coefficient

2025-99-0220

12/23/2025

222

Cheng, Lizhi, Guan, Yanyan, Cheng, Xinyu, Hu, Jiangbi, Fu, Youlei, Yang, Biyu, Song, Shousong

Research on SHM Acceleration Data Recovery Method Based on CNN-BILSTM

2025-99-0341

12/17/2025

Zhang, Xiangyi

Study on the Performance of High-Pressure Oxygen Cylinder Oxygen Supplemental System in Civil Aircraft Lavatories Based on Airworthiness Oxygen Requirements

2025-99-0307

12/17/2025

This paper focuses on the performance of the high-pressure oxygen cylinder oxygen supplemental system in the lavatory of civil aircraft. Due to the potential safety hazards of chemical oxygen generators in the lavatory, high-pressure gaseous oxygen cylinders are used instead. Through theoretical and study, the influence of the orifice on the oxygen flow rate is thoroughly investigated. Based on relevant principles, the calculation method of the gas flow characteristics in the orifice is determined. Considering the high initial pressure of the oxygen cylinder, the supersonic flow condition within approximately 20 minutes is mainly considered. The Simulink is used to simulate the system flow rate under different temperatures during cabin depressurization. Experimental verification shows that the oxygen flow rate under different temperatures meets the minimum oxygen demand, and the simulation results are highly consistent with the experimental results, indicating that the simulation

Wan, Shuting, Lei, Mingjun, Yu, Xiaoying

Study on the Sled Test of Far-Side Test and the Influencing Factors of Dummy Damage

2025-99-0331

12/17/2025

The addition of far-side occupants evaluation conditions in C-NCAP2024 version is an important consideration in the development of passive safety in vehicles. This article conducts analysis and research on key points such as test conditions, test results, and influencing factors. Firstly, introduce the test conditions, methods, and protection evaluation of far-side occupants. Secondly, analyze the distribution of factors such as airbag type, armrest height, test waveform, head offset, and dummy damage in the test data. Finally, analyze the influence of five factors, including airbag type, armrest height, test waveform, test conditions, and belt pre-tightening, on the test results. Analysis has found that the WorldSID 50th dummy’s lower neck MX is prone to exceeding high performance limits, compared to single chamber and double chamber airbags, three chamber airbags provide better protection for far-side occupants; For loading waveforms, the probability of the head being in the orange

He, Yonglong, Gu, Haiming, Guo, Xiaotian, Wang, Jingchen

Research on Risk Analysis of Emergencies in Heavy-Haul Railway Operations Based on Knowledge Graph

2025-99-0347

12/17/2025

Heavy-haul railways are a critical component of China’s dedicated freight rail network, serving as the primary land transport channel for energy and resource intermodal transportation. Their safe operation and transportation is essential for ensuring the reliable delivery of energy and raw materials. Taking the Shuohuang Heavy-haul Railway as a case study, based on the hazards identified across its entire operational chain, an ontology model structured as "professional module–task–process–hazard–risk attribute–management object" is constructed in this paper. Based on this model, a knowledge graph for heavy-haul railway operational emergencies is established. The study analyzes the connectivity between different nodes (e.g., work processes and hazards) in the knowledge graph and their potential relationships with risk values. Using directed graph-based degree centrality analysis, a risk assessment method incorporating node centrality is proposed. Risk values are computed at both the

Fu, Liqiang, Ren, Xiaolin, Rong, Lifan

Risk Assessment and Identification of Freight Vehicle Trip Chains

2025-99-0421

12/10/2025

Although the number of trucks is low, their accident rate is high, and the consequences of accidents are severe. This paper is based on GPS data from 100 trucks, with each trip chain defined by a vehicle’s stay time greater than 20 minutes. The kinematic parameters for each trip chain are then extracted, and the entropy weight method is used to calculate the weights of various parameters. A random forest model is applied to select 11 key indicators, including speed and acceleration. The entropy weight-TOPSIS algorithm is used to assess the risk of each trip chain for the trucks. Different combinations of continuous and discontinuous trip chain scenarios are constructed. Finally, support vector machines (SVM) and decision tree methods are used for risk prediction under different trip chain combinations. The results show that the 11 selected key indicators provide an accuracy of 95.74% for describing the sample. In general, the SVM model shows better prediction accuracy than the decision

Huang, Yunhe, Xiong, Zhihua, Li, Jiayu

Traffic Flow Risk Analysis on Expressway Straight Segments Using Drone Video

2025-99-0442

12/10/2025

In order to understand the changes of freeway traffic flow risk，drone videos was used to obtain vehicles trajectories on the freeway, analyzing the spatio-temporal interactions between vehicles, the propagation patterns of traffic conflicts, and the pattern of risk changes. Classify traffic flow states based on three-phase traffic theory. Starting from the frequency and severity of conflicts, the risk characteristics under different traffic flow states was investigated. The fuzzy C-means clustering algorithm was used to determine the risk level. Results indicate that the vehicles in the first lane on the left were more sensitive to the speed changes of the leading vehicles. The deceleration wave is highly consistent with the propagation path of traffic conflicts. When the backward propagation of deceleration waves, the collision risk also propagates backward simultaneously. In the process of transitioning from free flow to synchronized flow, high-risk state accounts for the highest

Ma, Xiaolong, Liu, Jianbei, Sun, Zhu, Wang, Jing

Automotive Engineering: December 2025

25AUTP1212/04/2025

IAA 2025 Coverage from Munich of IAA 2025 Qualcomm's Superbrains are here to help with automated driving Arbe chipset improves automated driving decisions DeepDrive's MG 250 generator brings dual-rotor power to PHEVs Horse Powertrain's Future Hybrid System can hybridize EVs Reducing SoC and SoH estimation errors: challenges and solutions in modern BMS New approaches to make SoC and SoH parameters more accurate will be required as battery demand keeps growing in the coming years. Driving safety forward: How simulation and MODSIM accelerate ADAS innovation Simulation has become mission-critical for ADAS development. Model-based systems engineering can integrate modeling and simulation from the start of the design process. Revolutionizing vehicle technology through intelligent actuators A look at E/E complexity at the endpoints, where microcontrollers play a crucial role. Automated fiber placement with Ramy Harik AFP can build complex, lightweight structures, but cost concerns keep its

Mitigating Biocompatibility Risks from Material and Supplier Changes in Medical Devices

TBMG-54341

12/01/2025

In this Q&A, Audrey Turley, director of lab operations – biosafety at Nelson Laboratories, spoke with Medical Design Briefs about the critical importance of monitoring and managing material changes in medical devices. Even seemingly minor shifts — such as switching suppliers or altering processing steps — can introduce unknown additives or variations that impact biocompatibility and, ultimately, patient safety. Turley discusses how manufacturers can effectively document and justify changes, maintain regulatory compliance, and strengthen supplier relationships to ensure ongoing device safety. She also shares insights into trends shaping post-pandemic supply-chain strategies and the growing emphasis on proactive risk assessment and communication across the product lifecycle.

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